CA2558961C - Optical integrating chamber lighting using multiple color sources for luminous applications - Google Patents

Optical integrating chamber lighting using multiple color sources for luminous applications Download PDF

Info

Publication number
CA2558961C
CA2558961C CA002558961A CA2558961A CA2558961C CA 2558961 C CA2558961 C CA 2558961C CA 002558961 A CA002558961 A CA 002558961A CA 2558961 A CA2558961 A CA 2558961A CA 2558961 C CA2558961 C CA 2558961C
Authority
CA
Canada
Prior art keywords
light
color
lighting fixture
fixture
aperture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA002558961A
Other languages
French (fr)
Other versions
CA2558961A1 (en
Inventor
Jack C. Rains, Jr.
Christopher Bates
Matthew Brown
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Advanced Optical Technologies LLC
Original Assignee
Advanced Optical Technologies LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Advanced Optical Technologies LLC filed Critical Advanced Optical Technologies LLC
Publication of CA2558961A1 publication Critical patent/CA2558961A1/en
Application granted granted Critical
Publication of CA2558961C publication Critical patent/CA2558961C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00Lighting devices or systems producing a varying lighting effect
    • F21S10/02Lighting devices or systems producing a varying lighting effect changing colors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00Lighting devices intended for fixed installation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources
    • F21V5/008Combination of two or more successive refractors along an optical axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/22Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/22Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/28Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02Details
    • G01J3/0205Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/0254Spectrometers, other than colorimeters, making use of an integrating sphere
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02Details
    • G01J3/10Arrangements of light sources specially adapted for spectrometry or colorimetry
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0205Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0252Diffusing elements; Afocal elements characterised by the diffusing properties using holographic or diffractive means
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0273Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278Diffusing elements; Afocal elements characterized by the use used in transmission
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0273Diffusing elements; Afocal elements characterized by the use
    • G02B5/0284Diffusing elements; Afocal elements characterized by the use used in reflection
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/0008Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted at the end of the fibre
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00Special procedures for taking photographs; Apparatus therefor
    • G03B15/02Illuminating scene
    • G03B15/06Special arrangements of screening, diffusing, or reflecting devices, e.g. in studio
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/04Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0404Signs, boards or panels, illuminated from behind the insignia the light source being enclosed in a box forming the character of the sign
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/04Signs, boards or panels, illuminated from behind the insignia
    • G09F13/06Signs, boards or panels, illuminated from behind the insignia using individual cut-out symbols or cut-out silhouettes, e.g. perforated signs
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/04Signs, boards or panels, illuminated from behind the insignia
    • G09F13/14Arrangements of reflectors therein
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/20Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B35/00Electric light sources using a combination of different types of light generation
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20Controlling the colour of the light
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20Controlling the colour of the light
    • H05B45/22Controlling the colour of the light using optical feedback
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30Driver circuits
    • H05B45/395Linear regulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
    • F21V11/10Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures of iris type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V2200/00Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/10Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of the optical fibres type
    • F21V2200/13Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of the optical fibres type the light being emitted at the end of the guide
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources
    • F21V5/002Refractors for light sources using microoptical elements for redirecting or diffusing light
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40Lighting for industrial, commercial, recreational or military use
    • F21W2131/406Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00Combination of light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00Combination of light sources
    • F21Y2113/10Combination of light sources of different colours
    • F21Y2113/13Combination of light sources of different colours comprising an assembly of point-like light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00Combination of light sources
    • F21Y2113/20Combination of light sources of different form
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00Photometry, e.g. photographic exposure meter
    • G01J1/02Details
    • G01J1/08Arrangements of light sources specially adapted for photometry standard sources, also using luminescent or radioactive material
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02Details
    • G01J3/0264Electrical interface; User interface
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/501Colorimeters using spectrally-selective light sources, e.g. LEDs
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20Controlling the colour of the light
    • H05B45/28Controlling the colour of the light using temperature feedback
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00Illumination
    • Y10S362/80Light emitting diode
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00Illumination
    • Y10S362/812Signs

Abstract

A system provides light of selectable spectral characteristic (e.g. a selectable color combination of light), for luminous applications such a signage and indicator lights (10). An optical integrating cavity (11) combines energy of different wavelengths from different sources, typically different colored LEDs. The cavity has a diffusively reflective interior surface (29) and an aperture (17) for allowing emission of combined light. Control of the intensity of emission of the sources sets the amount of each wavelength of light in the combined output and thus determines a spectral characteristic of the light output through the aperture. A deflector (25) shaped like a number, character, letter, or other symbol, may be coupled to a similarly shaped aperture. By combining several such fixtures, it is possible to spell out words and phrases, with selectable color lighting. Disclosed fixture examples use an extruded body member with appropriately located reflective surfaces to form both the cavity and deflector.

Description

OPTICAL INTEGRATING CHAMBER LIGHTING USING MULTIPLE COLOR SOURCES
FOR LUMINOUS APPLICATIONS
Technical Field [0001] The present subject matter relates to techniques and equipment to provide light having a selectable spectral characteristic (e.g. a selectable color characteristic), by combining selected amounts of light energy of different wavelengths from different sources, using an optical cavity, particularly for luminous applications such as signage, indicator lights and the like.
Background [0002] May luminous lighting applications, for signage or indicator lights or the like, would benefit from precisely controlled spectral characteristic of the radiant energy. It has long been known that combining the light of one color with the light of another color creates a third color. For example, the commonly used primary colors Red, Green and Blue of different ' amounts can be combined to produce almost any color in the visible spectrum.
Adjustment of the amount of each primary color enables adjustment of the spectral properties of the combined light stream. Recent developments for selectable color systems have utilized light emitting diodes as the sources of the different light colors.
[0003] Light emitting diodes (LEDs) were originally developed to provide visible indicators and information displays. For such luminance applications, the LEDs emitted relatively low power. However, in recent years, improved LEDs have become available that produce relatively high intensities of output light. These higher power LEDs, for example, have been used in arrays for traffic lights. Today, LEDs are available in almost any color in the color spectrum.
[0004] Systems are known which combine controlled amounts of projected light from at least two LEDs of different primary colors. Attention is directed, for example, to US patent nos. 6,459,919, 6,166,496 and 6,150,774. Typically, such systems have relied on using pulse-width modulation or other modulation of the LED driver signals to adjust the intensity of each LED color output. The modulation requires complex circuitry to implement.
Also, such prior systems have relied on direct radiation or illumination from the individual source LEDs. In some applications, the LEDs may represent undesirably bright sources if viewed directly. Also the direct illumination from LEDs providing multiple colors of light has not provided optimum combination throughout the field of illumination. In some systems, the observer can see the separate red, green and blue lights, from the LEDs at short distances from the fixture, even if the LEDs are covered by a translucent diffuser. Integration of colors by the eye becomes effective only at longer distances.
[0005] Another problem arises from long-term use of LED type light sources. As the LEDs age, the output intensity for a given input level of the LED drive current decreases. As a result, it may be necessary to increase power to an LED to maintain a desired output level.
This increases power consumption. In some cases, the circuitry may not be able to provide enough light to maintain the desired light output level. As performance of the LEDs of different colors declines differently with age (e.g. due to differences in usage), it may be difficult to maintain desired relative output levels and therefore difficult to maintain the desired spectral characteristics of the combined output. The output levels of LEDs also vary with actual temperature (thermal) that may be caused by difference in ambient conditions or different operational heating and/or cooling of different LEDs. Temperature induced changes in performance cause changes in the spectrum of light output.
[0006] US patent no. 6,007,225 to Ramer et al. (Assigned to Advanced Optical Technologies, L.L.C.) discloses a directed lighting system utilizing a conical light deflector. At least a portion of the interior surface of the conical deflector has a specular reflectivity. In several disclosed embodiments, the source is coupled to an optical integrating cavity; and an outlet aperture is coupled to the narrow end of the conical light deflector.
This patented lighting system provides relatively uniform light intensity and efficient distribution of light over a field of illumination defined by the angle and distal edge of the deflector. However, this patent does not discuss particular color combinations or effects.
[0007] Hence, a need still exists for a technique to efficiently combine energy from multiple sources having multiple wavelengths and direct the radiant energy effectively toward a desired field of illumination, particularly for luminous lighting applications. ' A related need still exists for such a system that does not require complex electronics (e.g.
modulation circuitry) to control the intensity of the energy output from the sources of the radiant energy of different wavelengths. A need also exists for a technique to effectively maintain a desired energy output level and the desired spectral character of the combined output as LED
performance decreases with age, preferably without requiring excessive power levels.
Summary [OOOS] Lighting fixtures disclosed herein use an optical cavity, having a diffusely reflective interior surface and an aperture for allowing emission of combined radiant energy.
Sources supply radiant energy into the interior of the cavity. At least two of the sources emit radiant energy of different wavelengths. The cavity effectively combines the energy of the different wavelengths, so that the radiant energy emitted through the aperture includes the radiant energy of the various wavelengths. The apparatus also includes a deflector for directing the combined light output in a desired manner.
[0009] For luminous applications, the deflector and typically the aperture will have the shape of a number, character, letter, or symbol. Several of these fixtures may be used together to spell out a word or phrase, and the color of each component of the word or phrase may be selectively controlled. Examples are disclosed in which the fixture is formed using an extruded body member. Interior surfaces of the extruded member, having appropriate reflectivity, form the cavity and the deflector.
[0010] Hence, a lighting fixture, for a luminous lighting application, might include first and second light sources providing light of first and second wavelengths. This fixture further includes an optical cavity having a diffusely reflective interior surface. The integrating cavity receives and combines light of the two different wavelengths from the sources.
An aperture allows emission of combined light, including both the wavelengths. This fixture also has a reflective deflector shaped like a number, character, letter, or symbol. A
proximal opening of the deflector is coupled to the aperture of the optical cavity. The deflector directs the combined light emitted through the aperture so as to provide a luminous representation of the number, character, letter, or symbol.
[0011 ] In a somewhat different aspect, a lighting fixture might include first and second light sources providing light of first and second wavelengths and an extruded body member.
The diffusely reflective optical integrating cavity is formed by a first reflective interior surface of the extruded body member. Again, the cavity receives and combines the light of the two different wavelengths and emits the combined light through an aperture. This fixture also includes a reflective deflector formed by a second reflective interior surface of the extruded body member. The deflector has a proximal opening coupled to the aperture of the optical integrating cavity, and it directs the combined light emitted through the aperture to a desired region.
[0012] A system using a lighting fixture as disclosed herein will include a control circuit, coupled to the sources for establishing output intensity of radiant energy of each of the sources. Control of the intensity of emission of the sources sets a spectral characteristic of the combined radiant energy emitted through the aperture.
[0013] In the examples, the points of entry of the energy from the sources into the cavity are located so that the emission points are not directly visible through the aperture.
Each source typically comprises one or more light emitting diodes (LEDs). It is possible to install any desirable number of LEDs. Hence, In several examples, the sources may comprise one or more LEDs for emitting light of a first color, and one or more LEDs for emitting light of a second color, wherein the second color is different from the first color. In a similar fashion, the apparatus may include additional LED sources of a third color, a fourth color, etc. To achieve the highest color-rendering index (CRI), the LED array may include LEDs of colors that effectively cover the entire visible spectrum.
[0014] The sources can include any color or wavelength, but typically include red, green, and blue. The integrating or mixing capability of the optical cavity serves to project light of any color, including white light, by adjusting the intensity of the various sources coupled to the cavity. Hence, it is possible to control color rendering index, as well as color temperature. The system works with the totality of light output from a family of LEDs.
However, to provide color adjustment or variability, it is not necessary to control the output of individual LEDs, except as the intensity of each contributes to the totality.
For example, it is not necessary to modulate the LED outputs. Also, the distribution pattern of the LEDs is not significant. The LEDs can be arranged in any manner to supply radiant energy within the optical cavity, although typically direct view from outside the fixture is avoided.
[0015] Other examples are disclosed which include one or more white light sources.
The white light source may be one or more white LEDs. Alternatively, such fixtures may utilize other light sources or lamps, such as incandescent or fluorescent light bulbs. In fixtures utilizing white light sources, the light from the colored LEDs provides an adjustment or correction to the white light output of the apparatus.
[0016] ' An exemplary system includes a number of "sleeper" LEDs that would be activated only when needed, for example, to maintain the light output, color, color temperature or thermal temperature. Hence, examples are also disclosed in which the first color LEDs comprise one or more initially active LEDs for emitting light of the first color and one or more initially inactive LEDs for emitting light of the first color on an as needed basis. Similarly, the second color LEDs include one or more initially active LEDs for emitting light of the second color and one or more initially inactive LEDs for emitting light of the second color on an as needed basis. In a similar fashion, the apparatus may include additional active and inactive LED sources of a third color, fourth color, etc. or active and inactive LED
sources of white light.
[0017] As noted in the background, as LEDs age or experience increases in thermal temperature, they continue to operate, but at a reduced output level. The use of the sleeper LEDs greatly extends the lifecycle of the fixtures. Activating a sleeper (previously inactive) LED, for example, provides compensation for the decrease in output of the originally active LED. There is also more flexibility in the range of intensities that the fixtures may provide.
[0018] A number of different examples of control circuits are discussed below.
In one example, the control circuitry comprises a color sensor coupled to detect color distribution in the combined radiant energy. Associated logic circuitry, responsive to the detected color distribution, controls the output intensity of the various LEDs, so as to provide a desired color distribution in the integrated radiant energy. In an example using sleeper LEDs, the logic circuitry is responsive to the detected color distribution to selectively activate the inactive light emitting diodes as needed, to maintain the desired color distribution in the combined light.
[0019] A number of other control circuit features also are disclosed. For example, the control circuitry may also include a temperature sensor. In such an example, the logic circuitry is also responsive to the sensed temperature, e.g. to reduce intensity of the source outputs to compensate for temperature increases. The control circuitry may include an appropriate device for manually setting the desired spectral characteristic, for example, one or more variable resistors or one or more dip switches, to allow a user to define or select the desired color distribution. Automatic controls also are envisioned. For example, the control circuitry may include a data interface coupled to the logic circuitry, for receiving data defining the desired color distribution. Such an interface would allow input of control data from a separate or even remote device, such as a personal computer, personal digital assistant or the like. A number of the devices, with such data interfaces, may be controlled from a common central location or device.
[0020] The control may be somewhat static, e.g. set the desired color reference index or desired.color temperature and the overall intensity and leave the device set-up in that manner for an indefinite period. The apparatus also may be controlled dynamically, for example, to vary the color of the combined light output and thereby provide special effects lighting. Also, such light settings are easily recorded and reused at a later time or even at a different location using a different system.
[0021] The disclosed apparatus may use a variety of different structures or arrangements for the optical integrating cavity. It is desirable that the interior cavity surface have a highly efficient diffusely reflective characteristic, e.g. a reflectivity of over 90%, with respect to the relevant wavelengths. In several examples, the cavity is formed of a diffusely reflective plastic material, such as a polypropylene having a 98% reflectivity and a diffuse reflective characteristic. Another example of a material with a suitable reflectivity is SPECTRALON. Alternatively, the optical integrating cavity may comprise a rigid substrate having an interior surface, and a diffusely reflective coating layer formed on the interior surface of the substrate so as to provide the diffusely reflective interior surface of the optical integrating cavity.
[0022] A variety of different shapes may be used for the interior reflective surface of the cavity. Although it may be triangular or in the shape of a pyramid, in several examples, the diffusely reflective interior surface of the optical integrating cavity has an extended volume having a rectangular cross-section. Other examples utilize a cavity shape corresponding to a substantial portion of a sphere (e.g. hemispherical) or a substantial portion of a cylinder (e.g.
approximating a half cylinder). a [0023] The disclosed devices have numerous applications, and the, output intensity and spectral characteristic may be tailored and/or adjusted to suit the particular application. For example, the intensity of the integrated radiant energy emitted through the aperture may be at a level for use in a lamination application or at a level sufficient for a task lighting application.
Exemplary luminous lighting systems provide symbol, letter number or character display lighting, for example, for signage.
[0024] Additional objects, advantages and novel features of the examples will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and the accompanying drawings or may be learned by production or operation of the examples. The objects and advantages of the present subject matter may be realized and attained by means of the methodologies, instrumentalities and combinations particularly pointed out in the appended claims.
Brief Description of the Drawings [0025] The 'drawing figures depict one or more implementations in accord with the present concepts, by way of example only, not by way of limitations. In the figures, like reference numerals refer to the same or similar elements.
[0026] Fig. 1 illustrates an example of a luminous application lighting system, with certain elements thereof shown in cross-section.
[0027] Fig. 2 is an isometric view of an extruded body member, of a fixture having the cross-section of Fig. 1.
[0028] Fig. 3 is a front view of a fixture for use in a luminous application, for example to represent the letter "L"
[0029] Fig. 4 is a front view of a fixture for use in a luminous application, representing the letter "L."
[0030] Fig. 5 is a functional block diagram of the electrical components, of one of the light emitting systems, using programmable digital, control logic.
[0031 ] Fig. 6 is a circuit diagram showing the electrical components, of one of the light emitting systems, using analog control circuitry.
[0032] Fig. 7 is a diagram, illustrating a munber of light emitting systems with common control from a master control unit.
[0033] Fig. 8 is a cross-sectional view of another example of an optical cavity LED
light fixture.
[0034] Fig. 9 is an isometric view of an extruded section of a fixture having the cross-section of Fig. 8.
[0035] Fig. 10 is a cross-sectional view of another example of an optical cavity LED
light fixture, using a combination of a white light source and a plurality of primary color light sources.
[0036] Fig. 11 is a cross-sectional view of another example of an optical cavity LED
light fixture, in this case using a deflector and a combination of a white light source and a plurality of primary color light sources.
Detailed Descri tp ion [0037] Reference now is made in detail to the examples illustrated in the accompairying drawings and discussed below. Fig. 1 is a cross-sectional illustration of a radiant energy distribution apparatus or system 10. For luminous lighting applications, such as signage and indicator lights, the apparatus emits light in the visible spectrum, although the system 10 may be used for lamination applications and/or with emissions in or extending into the infrared and/or ultraviolet portions of the radiant energy spectrum. Most of the disclosed examples are configured for luminous lighting applications. However, those skilled in the art will recognize that several of the systems discussed below that utilize extruded elements also may be adapted for task lighting or object/product lighting applications.
[0038] The illustrated system 10 includes an optical cavity 11 having a diffusely reflective interior surface, to receive and combine radiant energy of different colors/wavelengths. The cavity 11 may have various shapes. For example, the cavity may be hemispherical or semi-cylindrical. In this fixture 10, the cavity 11 has a substantially rectangular cross-section. Fig. 2 is an isometric view of a portion of a fixture having the cross-section of Fig. l, showing several of the components formed as a single extrusion of the desired cross section. Figs. 3 and 4 then show use of such a fixture arranged so as to construct lighted letters. The optical cavity 11 in many of the examples discussed below, e.g.
in the examples of Figs. 1-4, is typically an optical integrating cavity having an extended volume with a rectangular cross-section.
[0039] The disclosed apparatus may use a variety of different structures or arrangements for the optical integrating cavity, however, the illustrated examples utilize an extruded body member having reflective surfaces at appropriate locations. At least a substantial portion of the interior surfaces) of the cavity 11 exhibits) diffuse reflectivity. It is desirable that the cavity surface have a highly efficient reflective characteristic, e.g. a reflectivity equal to or greater than 90%, with respect to the relevant wavelengths. In the example of Fig. 1, the surface is highly diffusely reflective to energy in the visible, near-infrared, and ultraviolet wavelengths.
[0040] The cavity 11 may be formed of a diffusely reflective plastic material extruded in the desired shape. One example of suitable plastic is a polypropylene having a 97%
reflectivity and a diffuse reflective characteristic. Such a highly reflective polypropylene is available from Ferro Corporation - Specialty Plastics Group, Filled and Reinforced Plastics Division, in Evansville, IN. Another example of a plastic material with a suitable reflectivity is SPECTRALON. Alternatively, the optical integrating cavity may comprise a rigid extruded substrate having an interior surface, and a diffusely reflective coating layer formed on the interior surface of the substrate so as to provide the diffusely reflective interior surface of the optical integrating cavity. The coating layer, for example, might take the form of a flat-white paint or white powder coat. A suitable paint might include a zinc-oxide based pigment, consisting essentially of an uncalcined zinc oxide and preferably containing a small amount of a dispersing agent. The pigment is mixed with an alkali metal silicate vehicle-binder, which preferably is a potassium silicate, to form the coating material. For more information regarding the exemplary paint, attention is directed to US patent application serial number 09/866,516, which was filed May 29, 2001, by Matthew Brown, which issued as US. Patent No.
6,700,112 on March 2, 2004.
[0041] For purposes of the discussion, assiune that the fixture includes an extruded body. A rectangular section 13 of the body has a diffusely reflective interior surface forming the cavity 11. The extruded member may be formed of a diffusely reflective plastic, or the member may be extruded of plastic or other materials and have a diffusely reflective coating or paint on the interior surface forming the cavity 11. As a result, the cavity 11 is an integrating type optical cavity.
[0042) The rectangular section 13 includes a wall 15. The wall 15 has an aperture 17 for allowing emission of combined radiant energy. In the example, the aperture 17 is a passage through the approximate center of the wall 15, although the aperture may be at any other convenient location on the wall 15 or elsewhere on the rectangular section 13.
Because of the diffuse reflectivity within the cavity 11, light within the cavity is integrated before passage out of the aperture 17. In the example of Fig. 1, the apparatus 10 is shown emitting the combined radiant energy upward through the aperture 17, for convenience. However, the apparatus 10 may be oriented in any desired direction to perform a desired application function, for example to provide visible luminance to persons in a particular direction or location with respect to the fixture. Also, the optical integrating cavity 11 may have more than one aperture 17, for example, oriented to allow emission of integrated light in two or more different directions or regions, e.g. as required to represent a particular character or symbol or a number of such symbols in a desired arrangement.
[0043] The apparatus 10 also includes sources of radiant energy of different wavelengths. In the first example, the sources are LEDs 19, two of which are visible in the illustrated cross-section. The LEDs 19 supply radiant energy into the interior of the optical integrating cavity 11. As shown, the points of emission into the interior of the optical integrating cavity are not directly visible through the aperture 17. At least two of the LEDs emit radiant energy of different wavelengths, e.g. Red (R) and Green (G).
Additional LEDs of the same or different colors may be provided. The cavity 11 effectively integrates the energy of different wavelengths, so. that the integrated or combined radiant energy emitted through the aperture 17 includes the light of all the various wavelengths in relative amounts substantially corresponding to the relative intensities of input into the cavity 11.
[0044] The source LEDs 19 can include LEDs of any color or wavelength.
Typically, an array of LEDs for a visible light application includes at least red, green, and blue LEDs.
The integrating or mixing capability of the cavity 11 serves to project light of any color, including white light, by adjusting the intensity of the various sources coupled to the cavity.
Hence, it is possible to control color rendering index (CRI), as well as color temperature. The system 10 works with the totality of light output from a family of LEDs 19.
However, to provide color adjustment or variability, it is not necessary to control the output of individual LEDs, except as they contribute to the totality. For example, it is not necessary to modulate the LED outputs. Also, the distribution pattern of the individual LEDs and their emission points into the cavity are not significant. The .LEDs 19 can be arranged in any manner to supply radiant energy within the cavity, although it is preferred that direct view of the LEDs from outside the fixture is minimized or avoided.
[0045] In this example, light outputs of the LED sources 19 are coupled directly to openings at points on the interior of the cavity 11, to emit radiant energy directly into the interior of the optical integrating cavity. The LEDs may be located to emit light at points on the interior wall of the rectangular section 13,. although preferably such points would still be in regions out of the direct line of sight through the aperture 17. For ease of construction, however, the openings for the LEDs 19 are formed through the wall 15. On the wall 15, the openings/LEDs may be at any convenient locations.
[0046] The apparatus 10 also includes a control circuit 21 coupled to the LEDs 19 for establishing output intensity of radiant energy of each of the LED sources.
The control circuit 21 typically includes a power supply circuit coupled to a source, shown as an AC power source 23. The control circuit 21 also includes an appropriate number of LED driver circuits for controlling the power applied to each of the individual LEDs 19 and thus the intensity of radiant energy supplied to the cavity 11 for each different wavelength.
Control of the intensity of emission of the sources sets a spectral characteristic of the combined radiant energy emitted through the aperture 17 of the optical integrating cavity. The control circuit 21 may be responsive to a number of different control input signals, for example, to one or more user inputs as shown by the arrow in Fig. 1. Although not visible in this illustration, feedback may also be provided. Specific examples of the control circuitry are discussed in more detail later.
[0047] The aperture 17 may serve as the system output, directing integrated color light to a desired area or region. Although not shown in this example the aperture 17 may have a grate, lens or diffuser (e.g. a holographic element) to help distribute the output light and/or to close the aperture against entry of moisture of debris. The aperture 17 may have any shape desired to facilitate a particular luminance application and provide light passage for transmission of reflected and integrated light outward from the cavity 11.
[0048] For luminous applications, the system 10 includes a reflective deflector 25 to further process and direct the light emitted from the aperture 17 of the optical integrating cavity 11. The deflector 25 has a reflective interior surface 29. When viewed in cross-section, the reflective portion of the deflector expands outward laterally from the aperture 17, as it extends away from the cavity 11 toward the region to be illuminated. In a circular implementation, the deflector 25 would be conical, e.g. to represent a period or dot. However, in the example of Fig. 2, the deflector is formed by two opposing panels 25a and 25b of the extruded body. The inner surfaces 29a and 29b of the panels are reflective. All or portions of the deflector surfaces may be diffusely reflective, quasi-specular or specular. For some examples, it may be desirable to have one panel surface 29a diffusely reflective and have specular reflectivity on the other panel surface 29b.
[0049] As shown in Fig. 1, a small opening at a proximal end of the deflector 25 is coupled to the aperture 17 of the optical integrating cavity l 1. The deflector 25 has a larger opening 27 at a distal end thereof. The angle of the interior surface 29 and size of the distal opening 27 of the deflector 25 define an angular field of radiant energy emission from the apparatus 10. The large opening of the deflector 25 may be covered with a grating, a plate or the exemplary lens 31 (which is omitted from Fig. 2, for convenience). The lens 31 may be clear or translucent to provide a diffuse transmissive processing of the light passing out of the large opening. Prismatic materials, such as a sheet of microprism plastic or glass also may be used.
[0050] The overall shape of the fixture in system 10 may be chosen to provide a desired luminous shape, for example, in the shape of any selected number, character, letter, or other symbol. Fig. 3, for example, shows a view of such a fixture, as if looking back from the area receiving the light, with the lens removed from the output opening of the deflector 25. In this example, the aperture 171 and the output opening of the deflector 251 are both rectangular, although they may have somewhat rounded corners. Alternatively, the deflector may be somewhat oval in shape. To the observer, the fixture will appear as a tall rectangular light. If the long dimension of the rectangular shape is extended or elongated sufficiently, the lighted fixture might appear as a lighted letter I. The shapes of the cavity and the aperture may vary, for example, to have rounded ends, and the deflector may be contoured to match the aperture, for example, to provide softer or sharper edges and/or to create a desired font style for the letter.
[0051 ] Fig. 4 shows a view of another example of such a fixture, again as if looking back from the area receiving the light with the lens removed from the output opening of the deflector 25. In this example, the aperture 172 and the output opening of the deflector 252 are both L-shaped. When lighted, the observer will perceive the fixture as a lighted letter L. Of course, the shapes of the aperture and deflector openings may vary somewhat, for example, by using curves or rounded corners, so the letter approximates the shape for a different type font.
[0052] The extruded body construction illustrated in Fig. 2 may be curved or bent for use in different letters or numbers or other characters/symbols. By combining several versions of the fixture 10, shaped to represent different letters or numbers, it becomes possible to spell out any desired word or phrase. Control of the amplitudes of the drive currents applied to the LEDs 19 of each fixture controls the amount of each light color supplied into the respective optical integrating cavity and thus the combined light output color of each number, character, letter, or other symbol of the word or phrase.
[0053] In some examples, at least a substantial portion of the reflective interior surface 29 of the deflector 25 exhibits specular reflectivity with respect to the integrated radiant energy.
As discussed in US patent no. 6,007,225, for some applications, it may be desirable to construct the deflector 25 so that at least some portions) of the inner surface 29 exhibit diffuse reflectivity or exhibit a different degree of specular reflectivity (e.g., quasi-secular), so as to tailor the performance of the deflector 25 to the particular application. For other applications, it may also be desirable for the entire interior surface 29 of the deflector 25 to have a diffuse reflective characteristic.
[0054] In the illustrated example, the large distal opening 27 of the deflector 25 is roughly the same size as the cavity 11. In some applications, this size relationship may be convenient for construction purposes. However, a direct relationship in size of the distal end of the deflector and the cavity is not required. The large end of the deflector may be larger or smaller than the cavity structure. As a practical matter, the size of the cavity is optimized to provide the integration or combination of light colors from the desired number of LED sources 19. The size, angle and shape of the deflector 25 determine the area that will receive the luminous radiation from the combined or integrated light emitted from the cavity 11 emitted via the aperture 17.
[0055] In the examples, each source of radiant energy of a particular wavelength comprises one or more light emitting diodes (LEDs). Within the chamber, it is possible to process light received from any desirable number of such LEDs. Hence, in several examples, then sources may comprise one or more LEDs for emitting light of a first color, and one or more LEDs for emitting light of a second color, wherein the second color is different from the first color. In a similar fashion, the apparatus may include additional sources comprising one or more LEDs of a third color, a fourth color, etc. To achieve the highest color rendering index (CRI), the LED array may include LEDs of various wavelengths that cover virtually the entire visible spectrum. Examples with additional sources of substantially white light are discussed later. ' [0056] Figs. 3 and 4 also depict use of initially inactive or "sleeper" LEDs.
In these examples, the array of LEDs 19 includes initially active LEDs for providing red (R), green (G) and blue (B) light. Specifically, there are two red (R) LEDs, one green (G) LED and one blue (B) LED. The array of LEDs 19 in these examples also includes sleeper LEDs of each type. In the examples, the sleeper LEDs might include one Red sleeper (RS) LED, one Green sleeper (GS) LED and one Blue sleeper (BS) LED.
[0057] The control circuit 21 controls the power provided to each of the LEDs 19. The cavity 11 effectively integrates the energy of different wavelengths, from the various LEDs 19, so that the integrated light energy emitted through the apertures 17 and 27 includes the radiant energy of all the various wavelengths. Control of the intensity of emission of the sources, by the control circuit 21, sets a spectral characteristic of the combined radiant energy emitted through the aperture 35. The control also activates one or more dormant LEDs, on an "as-needed" basis, when extra output of a particular wavelength or color is required in order to maintain the light output, color, color temperature, and/or thermal temperature. As discussed later with regard to an exemplary control circuit, the system 10 could have a color sensor coupled to provide feedback to the control circuit 21. The sensor could be within the cavity or the deflector or at an outside point illuminated by the integrated light from the fixture. The control may also be responsive to other sensors, such as a temperature sensor and/or an overall intensity sensor.
[0058] As LEDs age, they continue to operate, but at a reduced output level.
The use of the sleeper LEDs greatly extends the lifecycle of the fixtures. Activating a sleeper (previously inactive) LED, for example, provides compensation for the decrease in output of the originally active LED. There is also more flexibility in the range of intensities that the fixtures may provide.
[0059] In the examples discussed above relative to Fig. 1 to 4, the LED
sources were coupled directly to openings at the points on the interior of the cavity, to emit radiant energy directly into the interior of the optical integrating cavity. It is also envisioned that the sources may be somewhat separated from the cavity, in which case, the device might include optical fibers or other forms of light guides coupled between the sources and the optical integrating cavity, to supply radiant energy from the sources to the emission points into the interior of the cavity.
[0060] The disclosed devices have numerous applications, and the output intensity and spectral characteristic may be tailored and/or adjusted to suit the particular application. For example, the intensity of the integrated radiant energy emitted through the aperture may be at a level for use in a lamination application or at a level sufficient for a task lighting application.
Illumination of a specific object or person also is possible. A number of other control circuit features also may be implemented. For example, the control may maintain a set color characteristic in response to feedback from a color sensor. The control circuitry may also include a temperature sensor. In such 'an example, the logic circuitry is also responsive to the sensed temperature, e.g. to reduce intensity of the source outputs to compensate for temperature increases. The control circuitry may include an appropriate device for manually setting the desired spectral characteristic, for example, one or more variable resistors or one or more dip switches, to allow a user to define or select the desired color distribution.
[0061] Automatic controls also are envisioned. For example, the control circuitry may include a data interface coupled to the logic circuitry, for receiving data defining the desired color distribution. Such an interface would allow input of control data from a separate or even remote device, such as a personal computer, personal digital assistant or the like. A number of the devices, with such data interfaces, may be controlled from a common central location or device.
[0062] The control may be somewhat static, e.g. set the desired color reference index or desired color temperature and the overall intensity, and leave the device set-up in that manner for an indefinite period. Also, light settings are easily recorded and reused at a later time or even at a different location using a different system.
[0063] To appreciate the features and examples of the control circuitry outlined above, it may be helpful to consider specific examples with reference to appropriate diagrams.
[0064] Fig. 5 is a block diagram of exemplary circuitry for the sources and associated control circuit, providing digital programmable control, which may be utilized with a light integrating fixture of the type described above. In this circuit example, the sources of radiant energy of the various types takes the form of an LED array 111. The array 111 comprises two or more LEDs of each of the three primary colors, red green and blue, represented by LED
blocks 113, 115 and 117. For example, the array may comprise six red LEDs 113, three green LEDs 115 and three blue LEDs 117.
[0065] The LED array in this example also includes a number of additional or "other"
LEDs 119. There are several types of additional LEDs that are of particular interest in the present discussion. One type of additional LED provides one or more additional wavelengths of radiant energy for integration within the chamber. The additional wavelengths may be in the visible portion of the light spectrum, to allow a greater degree of color adjustment.
Alternatively, the additional wavelength LEDs may provide energy in one or more wavelengths outside the visible spectrum, for example, in the infrared range or the ultraviolet range.
[0066] The second type of additional LED that may be included in the system is a sleeper LED. As discussed above, some LEDs would be active, whereas the sleepers would be inactive, at least during initial operation. Using the circuitry of Fig. 5 as an example, the Red LEDs 113, Green LEDs 115 and Blue LEDs 117 might normally be active. The LEDs would be sleeper LEDs, typically including one or more LEDs of each color used in the particular system.
[0067] The third type of other LED of interest is a white LED. For white luminous applications, one or more white LEDs provide increased intensity. The primary color LEDs then provide light for color adjustment and/or correction.
[0068] The electrical components shown in Fig. 5 also include an LED control system 120. The system 120 includes driver circuits for the various LEDs and a microcontroller. The driver circuits supply electrical current to the respective LEDs 113 to 119 to cause the LEDs to emit light. The driver circuit 121 drives the Red LEDs 113, .the driver circuit 123 drives the green LEDs 115, and the driver circuit 125 drives the Blue LEDs 117. In a similar fashion, when active, the driver circuit 127 provides electrical current to the other LEDs 119. If the other LEDs provide another color of light, and are connected in series, there may be a single driver circuit 127. If the LEDs are sleepers, it may be desirable to provide a separate driver circuit 127 for each of the LEDs 119. The intensity of the emitted light of a given LED is proportional to the level of current supplied by the respective driver circuit.

[0069] The current output of each driver circuit is controlled by the higher level logic of the system. In this digital control example, that logic is implemented by a programmable microcontroller 129, although those skilled in the art will recognize that the logic could take other forms, such as discrete logic components, an application specific integrated circuit (ASIC), etc.
[0070] The LED driver circuits and the microcontroller 129 receive power from a power supply 131, which is connected to an appropriate power source (not separately shown).
For most task-lighting applications, the power source will be an AC line current source, however, some applications may utilize DC power from a battery or the like.
The power supply 129 converts the voltage and current from the source to the levels needed by the driver circuits 121-127 and the microcontroller 129.
[0071] A programmable microcontroller typically includes or has coupled thereto random-access memory (RAM) for storing data and read-only memory (ROM) and/or electrically erasable read only memory (EEROM) for storing control programming and any pre-defined operational parameters, such as pre-established light 'recipes.' The microcontroller 129 itself comprises registers and other components for implementing a central processing unit (CPU) and possibly an associated arithmetic logic unit. The CPU implements the program to process data in the desired manner and thereby generate desired control outputs.
[0072] The microcontroller 129 is programmed to control the LED driver circuits 121-127 to set the individual output intensities of the LEDs to desired levels, so that the combined light emitted from the aperture of the cavity has a desired spectral characteristic and a desired overall intensity. The microcontroller 129 may be programmed to essentially establish and maintain or preset a desired 'recipe' or mixture of the available wavelengths provided by the LEDs used in the particular system. The microcontroller 129 receives control inputs specifying the particular 'recipe' or mixture, as will be discussed below. To insure that the desired mixture is maintained, the microcontroller receives a color feedback signal from an appropriate color sensor. The microcontroller may also ~ be responsive to a feedback signal from a temperature sensor, for example, in or near the optical integrating cavity.
[0073] The electrical system will also include one or more control inputs 133 for inputting information instructing the microcontroller 129 as to the desired operational settings.
A number of different types of inputs may be used and several alternatives are illustrated for convenience. A given installation may include a selected one or more of the illustrated control input mechanisms.
[0074] As one example, user inputs may take the form of a number of potentiometers 135. The number would typically correspond to the number of different light wavelengths provided by the particular LED array 111. The potentiometers 135 typically connect through one or more analog to digital conversion interfaces provided by the microcontroller 129 (or in associated circuitry). To set the parameters for the integrated light output, the user adjusts the potentiometers 135 to set the intensity for each color. The microcontroller 129 senses the input settings and controls the LED driver circuits accordingly, to set corresponding intensity levels for the LEDs providing the light of the various wavelengths.
[0075] Another user input implementation might utilize one or more dip switches 137.
For example, there might be a series of such switches to input a code corresponding to one of a number of recipes. The memory used by the microcontroller 129 would store the necessary intensity levels for the different color LEDs in the array 111 for each recipe. Based on the input code, the microcontroller 129 retrieves the appropriate recipe from memory. Then, the microcontroller 129 controls the LED driver circuits 121-127 accordingly, to set corresponding intensity levels for the I,EDs 113-119 providing the light of the various wavelengths.
[0076] As an alternative or in addition to the user input in the form of potentiometers 135 or dip switches 137, the microcontroller 129 may be responsive to control data supplied from a separate source or a remote source. For that purpose, some versions of the system will include one or more communication interfaces. One example of a general class of such interfaces is a wired interface 139. One type of wired interface typically enables communications to and/or from a personal ,computer or the like, typically within the premises in which the fixture operates. Examples of such local wired interfaces include LTSB, RS-232, and wire-type local area network (LAN) interfaces. Other wired interfaces, such as appropriate modems, might enable cable or telephone line communications with a remote computer, typically outside the premises. Other examples of data interfaces provide wireless communications, as represented by the interface 141 in the drawing. Wireless interfaces, for example, use radio frequency (RF) or infrared (IR) links. The wireless communications may be local on-premises communications, analogous to a wireless local area network (WLAN).

Alternatively, the wireless communications may enable communication with a remote device outside the premises, using wireless links to a wide area network.
[0077] As noted above, the electrical components may also include one or more feedback sensors,143, to provide system performance measurements as feedback signals to the control logic, implemented in this example by the microcontroller 129. A
variety of different sensors may be used, alone or in combination, for different applications. In the illustrated examples, the set 143 of feedback sensors includes a color sensor 145 and a temperature sensor 147. Although not shown, other sensors, such as an overall intensity sensor, may be used. The sensors are positioned in or around the system to measure the appropriate physical condition, e.g. temperature, color, intensity, etc.
[0078] The color sensor 145, for example, is coupled to detect color distribution in the integrated radiant energy. The color sensor may be coupled to sense energy within the optical integrating cavity 1l, within the deflector 25 or at a point in the field illuminated by the pa~.-ticular system 10. However, in many cases, the wall 15 or another part of the rectangular section 13 may pass some of the integrated light from the cavity 11, in which case, it is actually sufficient to place the color light sensors) 145 adjacent any such partially transmissive point on the outer wall that forms the cavity.
[0079] Various examples of appropriate color sensors are known. For example, the color sensor may be a digital compatible sensor, of the type sold by TAOS, Inc. Another suitable sensor might use the quadrant light detector disclosed in US patent no. 5,877,490, with appropriate color separation on the various light detector elements (see US
patent no. 5,914,487 for discussion of the color analysis).
[0080] The associated logic circuitry, responsive to the detected color distribution, controls the output intensity of the various LEDs, so as to provide a desired color distribution in the integrated radiant energy, in accord with appropriate settings. In an example using sleeper LEDs, the logic circuitry is responsive to the detected color distribution to selectively activate the inactive light emitting diodes as needed, to maintain the desired color distribution in the integrated radiant energy. The color sensor measures the color of the integrated radiant energy produced by the system and provides a color measurement signal to the microcontroller 129. If using the TAOS, Inc. color sensor, for example, the signal is a digital signal derived from a color to frequency conversion.

[0081] The temperature sensor 147 may be a simple thermo-electric transducer with an associated analog to digital converter, or a variety of other temperature detectors may be used.
The temperature sensor is positioned on or inside of the fixture, typically at a point that is near the LEDs or other sources that produce most of the system heat. The temperature sensor 147 provides a signal representing the measured temperature to the microcontroller 129. The system logic, here implemented by the microcontroller 129, can adjust intensity of one or more of the LEDs in response to the sensed temperature, e.g. to reduce intensity of the source outputs to compensate for temperature increases. The program of the micTOCOntroller 129, however, would typically manipulate the intensities of the various LEIOs so as to maintain the desired color balance between the various wavelengths of light used in the system, even though it may vary the overall intensity with temperature. For example, if temperature is increasing due to increased drive current to the active LEDs (with increased age or heat), the controller may deactivate one or more of those LEDs and activate a corresponding number of the sleepers, since the newly activated sleepers) will provide similar output in response to lower current and thus produce less heat.
[0082] The above discussion of Fig. 5 related to programmed digital implementations of the control logic. Those skilled in the art will recognize that the control also may be implemented using analog circuitry. Fig. 6 is a circuit diagram of a simple analog control for a lighting apparatus (e.g. of the type shown in Fig: 1) using Red, Green and Blue LEDs. The user establishes the levels of intensity for each type of radiant energy emission (Red, Green or Blue) by operating a corresponding one of the potentiometers. The circuitry essentially comprises driver circuits for supplying adjustable power to two or three sets of LEDs (Red, Green and Blue) and analog logic circuitry for;, adjusting the output of each driver circuit in accord with the setting of a corresponding potentiometer. Additional potentiometers and associated circuits would be provided for additional colors of LEDs. Those skilled in the art should be able to implement the illustrated analog. driver and control logic of Fig. 6 without further discussion.
[0083] The systems described above have a wide range of luminous applications, where there is a desire to set or adjust color provided by a lighting fixture. Some lighting applications involve a common overall control strategy for a number of the systems. As noted in the discussion of Fig. 5, the control circuitry may include a communication interface 139 or 141 allowing the microcontroller 129 to communicate with another processing system. Fig. 7 illustrates an example in which control circuits 21 of a number of the radiant energy generation systems with the light integrating and distribution type fixture communicate with a master control unit 151 via a communication network 153. The master control unit 151 typically is a programmable computer with an appropriate user interface, such as a personal computer or the like. The communication network 153 may be a LAN or a wide area network, of any desired type. The communications allow an operator to control the color and output intensity of all of the linked systems, for example to provide combined lighting effects from a number of fixtures that together spell our a word or phrase.
[0084] In the examples above, a deflector and a lens were used to provide further optical processing of the integrated light emerging from the aperture 17 of the fixture. A
variety of other optical processing devices. may be used in place of or in combination with those optical processing elements. Examples include various types of diffusers, collimators, variable focus mechanisms, and iris or aperture size control mechanisms.
[0085] Figs. 8 and 9 show another extruded type lighting fixture, but here adapted for a somewhat directed light throw. The fixture 330 includes an optical integrating cavity 331 having a diffusely reflective inner surface, as in the earlier examples. In this fixture, the cavity 331 again has a substantially rectangular cross-section. Fig. 9 is an isometric view of a section of an extruded body member forming a portion of the fixture. The isometric view, for example, shows several of the components, particularly the rectangular section 333 and the deflector, formed as a single extrusion of the desired cross section, but without any end-caps.
[0086] As shown in these figures, the fixture 330 includes several initially-active LEDs and several sleeper LEDs, generally shown at 339, similar to those in the earlier examples. The LEDs emit controlled amounts of multiple colors of light into the optical integrating cavity 341 formed by the inner surfaces of a rectangular member 333. A power source and control circuit similar to those used in the earlier examples provide the drive currents for the LEDs 339, and in view of the similarity, the power source and control circuit are omitted from Fig. 8, to simplify the illustration. One or more apertures 337, of the shape desired to facilitate the particular lighting application, provide light passage for transmission of reflected and integrated light outward from the cavity 341.

[0087] The fixture 330 in this example (Fig. 8) includes a deflector to further process and direct the light emitted from the apeuture 337 of the optical integrating cavity 341, in this can somewhat to the left of and above the fixture 330 in the orientation shown. The deflector is formed by two opposing panels 345a and 345b of the extruded body of the fixture. The panel 345a is relatively flat and angled somewhat to the left, in the illustrated orientation. Assuming a vertical orientation of the fixture as shown in Fig. 8, the panel 345b extends vertically upward from the edge of the aperture 337 and is bent back at about 90°. The shapes and angles of the panels 345a and 345b are chosen to direct the light to a particular area of a wall or product display that is to be illuminated, and may vary from application to application.
[0088] Each panel 345a, 345b has a reflective interior surface 349a, 349b. As in the earlier examples, all or portions of the deflector surfaces may be diffusely reflective, quasi-specular or specular. In the example, the deflector panel surface 349b is diffusely reflective, and the deflector panel surface 349a has a specular reflectivity, to optimize distribution of emitted light over the desired area illuminated by the fixture 330. The output opening of the deflector 345 may be covered with a grating, a plate or lens, in a manner similar to the example of Fig. 1, although in the illustrated example (Figs. 8 and 9), such an element is omitted.
[0089] Materials for construction of the cavity and the deflector and the types of LEDs that may be used are similar to those discussed relative to the example of Figs. 1 and 2, although the number and intensities of the LEDs may be different, to achieve the output parameters desired for a particular application. The extruded body construction illustrated in Figs. 8 and 9 may be curved or bent for use in different letters or numbers or other characters/symbols, as discussed above relative to Figs. 1-4.
[0090] Fig. 10 is a cross sectional view of another example of an extruded constmction of lighting fixture 350. The fixture 350 includes an optical integrating cavity 351 having a diffusely reflective inner surface, as in the earlier examples. In this fixture, the cavity 351 again has a substantially rectangular cross-section. As shown, the fixture 350 includes at least one white light source, represented by the white LED 355. The fixture also includes several LEDs 359 of the various primary colors, typically red (R), green (G) and blue (B, not visible in this cross-sectional view). The LEDs 359 include both initially-active LEDs and sleeper LEDs, and the LEDs 359 are similar to those in the earlier examples. Again, the LEDs emit controlled amounts of multiple colors of light into the optical integrating cavity 351 formed by the inner surfaces of a rectangular member 353. A power source and control circuit similar to those used in the earlier examples provide the drive currents for the LEDs 359, and in this example, that same circuit controls the drive current applied to the white LED 355. In view of the similarity, the power source and control circuit are omitted from Fig. 10, to simplify the illustration.
[0091] One or more apertures 357, of the shape desired to facilitate the particular lighting application, provide light passage for transmission of reflected and integrated light' outward from the cavity 351. The aperture may be laterally centered, as in the earlier examples; however, in this example, the aperture is off center to facilitate a light-throw to the left (in the illustrated orientation). Materials for construction of the cavity and the deflector and the types of LEDs that may be used are similar to those discussed relative to the earlier examples. Again, an extruded fixture of the illustrated cross section may be elongated, curved or bent, as desired to facilitate any desired application.
[0092] Here, it is assumed that the fixture 350 is intended to principally provide white light. The presence of the white light source 355 increases the intensity of white light that the fixture produces. The control of the outputs of the primary color LEDs 359 allows the operator i to correct for any variations of the white light from the source 355 from normal white light andlor to adjust the color balanceltemperature of the light output. For example, if the white light source 355 is an LED as shown, the white light it provides tends to be rather blue. The intensities of light output from the LEDs 359 can be adjusted to compensate for this blueness, for example, to provide a light output approximating sunlight or light from a common incandescent source, as or when desired.
[0093] The fixture 350 may have any desired output processing element(s), as discussed above with regard to various earlier examples. In the illustrated embodiment (Fig. 10), the fixture 350 includes a deflector to further process and direct the light emitted from the aperture 357 of the optical integrating cavity 351, in this case somewhat toward the left of and above the fixture 350. The deflector is formed by two opposing panels 365a and 365b having reflective inner surfaces 365a and 365b. Although other shapes may be used to direct the light output to the desired area or region, the illustration shows the panel 365a, 365b as relatively flat panels set at somewhat different angle extending to the left, in the illustrated orientation. Of course, as for all the examples,. the fixture may be turned at any desired angle or orientation to direct the light to a particular region from which a person will observe its luminance or to an object or person to be illuminated by the fixture, in a given application.
[0094] As noted, each panel 365a, 365b has a reflective interior surface 369a, 369b. As in the earlier examples, all or portions of the deflector surfaces may be, diffusely reflective, quasi-specular or specular. In the example, the deflector panel surface 369b is diffusely reflective, and the deflector panel surface 369a has a specular reflectivity, to optimize distribution of emitted light over the desired region intended to receive light from the fixture 350. The output opening of the deflector 365 may be covered with a grating, a plate or lens, in a manner similar to the example of Fig. l, although in the illustrated example (Fig. 10), such an element is omitted.
[0095] The extruded body construction illustrated in Fig. 10 may be curved or bent for use in different letters or numbers or other characters/symbols, as discussed above relative to Figs. 1-4.
[0096] Fig. 11 is a cross-sectional view of another example of an optical integrating cavity type light fixture 370. This example uses a deflector and lens to optically process the light output, and like the example of Fig. 10 the fixture 370 includes LEDs to produce various colors of light in combination with a white light source. The fixture 370 includes an optical integrating cavity 371, having a semi-circular cross-section. The fixture may be approximately hemispherical, or the fixture 370 may be elongated. The extruded body construction illustrated in Fig. 11 may be curved or bent for use in different letters or numbers or other characters/symbols, as discussed above relative to Figs. 1-4.
[0097] The surfaces of the extruded body forming the interior surfaces) of the cavity 371 are diffusely reflective. One or more apertures 377 provide a light passage for transmission of reflected and integrated light outward from the cavity 371.
Materials, sizes, orientation, positions and possible shapes for the elements forming, the cavity and the types/numbers of LEDs have been discussed above.
[0098] As shown, the fixture 370 includes at least one white light source.
Although the white light source could comprise one or more LEDs, as in the previous example (Fig. 10), in this embodiment, the white light source comprises ~a lamp 375. The lamp may be any convenient form of light bulb, such as an incandescent or fluorescent light bulb; and there may be one, two or more bulbs to produce a desired amount of white light. A
preferred example of the lamp 375 is a quartz halogen light bulb. The fixture also includes several LEDs 379 of the various primary colors, typically red (R), green (G) and blue (B, not visible in this cross-sectional view), although additional colors may be provided or other color LEDs may be substituted for the RGB LEDs. Some LEDs will be active from initial operation.
Other LEDs may be held in reserve as sleepers. The LEDs 379 are similar to those in the earlier examples, for emitting controlled amounts of multiple colors of light into the optical integrating cavity 371.
[0099] A power source and control circuit similar to those used in the earlier examples provide the drive currents for the LEDs 359. In view of the similarity, the power source and control circuit for the LEDs are omitted from Fig. 1 l, to simplify the illustration. The lamp 375 may be controlled by the same or similar circuitry, or the lamp may have a fixed power source.
[0100] The white light source 375 may be positioned at a point that is not directly visible through the aperture 377 similar to the positions of the LEDs 379.
However, for applications requiring relatively high white light output intensity, it may be preferable to position the white light source 375 to emit a substantial portion of its light output directly through the aperture 377.
[0101] The fixture 370 may incorporate any of the further optical processing elements discussed above. In the illustrated version, however, the fixture 370 includes a deflector 385 to fiuther process and direct the light emitted from the aperture 377 of the optical integrating cavity 371. The deflector 385 has a reflective interior surface 389 and expands outward laterally from the aperture, as it extends away from the cavity toward the region to be illuminated. In a circular implementation, the deflector 385 would be conical.
Of course, for applications using other fixture shapes, the deflector may be formed by two or more panels of desired sizes and shapes, e.g. as in Figs. 1, 2 and 8-10. The interior surface 389 of the deflector 385 is reflective. As in the earlier examples, all or portions of the reflective deflector surfaces) may be diffusely reflective, quasi-specular, specular or combinations thereof.
[0102] As shown in Fig. 11, a small opening at a proximal end of the deflector 385 is coupled to the aperture 377 of the optical integrating cavity 311. The deflector 385 has a larger opening at a distal end thereof. ~ The angle of the interior surface 389 and size of the , distal opening of the deflector 385 define an angular field of radiant energy emission from the apparatus 370.

[0103] The large opening of the deflector 385 is covered with a grating, a plate or the exemplary lens 387. The lens 387 may be clear or translucent to provide a diffuse transmissive processing of the light passing out of the large opening. Prismatic materials, such as a sheet of microprism plastic or glass also rnay be used. In applications where a person may look directly at the fixture 370 from the illuminated region, it is preferable to use a translucent material for the lens 387, to shield the observer from directly viewing the lamp 375.
[0104] The fixture 370 thus includes a deflector 385 and lens 387, for optical processing of the integrated light emerging from the cavity 371 via the aperture 377. Of course, other optical processing elements may be used in place of or in combination with the deflector 385 and/or the lens 387.
[0105] In the fixture of Fig. l l, the lamp 375 provides substantially white light of relatively high intensity. The integration of the light from the LEDs 379 in the cavity 375 supplements the light from the lamp 375 with additional colors, and the amounts of the different colors of light from the LEDs can be precisely controlled. Control of the light added from the LEDs can provide color correction and/or adjustment, as discussed above relative to the embodiment of Fig. 10.
[0106] ' As shown by the discussion above, each of the various radiant energy emission systems with multiple color sources and an optical cavity to combine the energy from the sources provides a highly effective means to control the color produced by one or more fixtures. The output color characteristics are controlled simply by controlling the intensity of each of the sources supplying radiant energy to the chamber.
[0107] Settings for a desirable .color are easily reused or transferred from one system/fixture to another. If color/temperature/balance offered by particular settings are found desirable, e.g. to provide special effects lighting on signage displayed at a number of different locations, it is a simple matter to record those settings from operation of one sign and apply them to similar fixtures forming signs at the other locations.
[0108] The methods for defining and transferring set conditions can utilize manual recordings of settings and input of the settings to the different lighting systems. However, it is preferred to utilize digital control, in systems such as described above relative to Figs. 10 and 12. Once input to a given lighting system, a particular set of parameters for a product or individual become another 'preset' lighting recipe stored in digital memory, which can be quickly and easily recalled and used each time that the particular product or person is to be illuminated.
[0109] While the foregoing has described what are considered to be the best mode and/or other examples, it is understood that various modifications may be made therein and that the subject matter disclosed herein may be implemented in various forms and examples, and that they may be applied in numerous applications, only some of which have been described herein. It is intended by the following claims to claim any and all modifications and variations that fall within the true scope of the present concepts.

Claims (32)

1. A lighting fixture, for a luminous lighting application, the fixture comprising:
a first of source of light of a first wavelength;
a second source of light of a second wavelength, the second wavelength being different from the first wavelength;
an optical cavity having a diffusely reflective interior surface for receiving and combining light of the first and second wavelengths from the sources, and having an aperture for allowing emission of combined light of both the first wavelength and the second wavelength; and a reflective deflector shaped like a number, character, letter, or symbol, having a proximal opening coupled to the aperture of the optical cavity, for directing the combined light emitted through the aperture so as to provide a visible luminous representation of the number, character, letter, or symbol.
2. The lighting fixture of claim 1, further comprising an extruded body member, wherein the optical cavity and the reflective deflector are formed by reflective surfaces of the extruded body member.
3. The lighting fixture of claim 1, further comprising a transmissive light diffusing member across a distal opening of the reflective deflector.
4. The lighting fixture of claim 1, wherein the aperture is shaped like a number, character, letter, or symbol.
5. The lighting fixture of claim 1, wherein the reflective deflector has a reflective inner surface coupled to the aperture to deflect at least some of the combined light, and at least a substantial portion of the reflective inner surface of the deflector exhibits a diffuse reflective characteristic with respect to the combined light.
6. The lighting fixture of claim 5, wherein:
a first portion of the reflective inner surface of the deflector exhibits a diffuse reflective characteristic with respect to the combined light; and a second portion of the reflective inner surface of the deflector exhibits a specular reflective characteristic with respect to the combined light.
7. The lighting fixture of any of claims 1-6, in combination with control circuitry coupled to the first and second sources for establishing output intensity of light output of each of the sources, so as to set a spectral characteristic of combined light emitted by the fixture.
8. The lighting fixture of any of claims 1-6, wherein:
the first source comprises one or more light emitting diodes for emitting light of a first visible color; and the second source comprises one or more light emitting diodes for emitting light of a second visible color, wherein the second color is different from the first color.
9. The lighting fixture of claim 8, wherein:
the one or more first color light emitting diodes comprise an initially active light emitting diode for emitting light of the first color and an initially inactive light emitting diode for emitting light of the first color on an as needed basis; and the one or more second color light emitting diodes comprises an initially active light emitting diode for emitting light of the second color and an initially inactive light emitting diode for emitting light of the second color on an as needed basis.
10. The lighting fixture of claim 9, further comprising a third source for supplying substantially white light into the optical cavity for combination with the light of the first and second wavelengths.
11. The lighting fixture of claim 10, wherein the third source comprises at least one white light emitting diode, halide light bulb, quartz halogen light bulb, incandescent light bulb or fluorescent light bulb.
12. The lighting fixture of any of claims 1-6, further comprising a third source for supplying light of a third wavelength into the optical cavity for combination with the light of the first and second wavelengths, the third wavelength being different from the first wavelength and from the second wavelength.
13. The lighting fixture of claim 12, wherein:
the first source comprises one or more light emitting diodes for emitting light of a first visible color;
the second source comprises one or more light emitting diodes for emitting light of a second visible color, wherein the second color is different from the first color; and the third source comprises one or more light emitting diodes for emitting light of a third visible color, wherein the third color is different from the first color and from the second color.
14. The lighting fixture of claim 13, wherein the first, second and third colors are red, green and blue, respectively.
15. A plurality of lighting fixtures as specified in any of claims 1-6 arranged to spell out a word or phrase.
16. A lighting network comprising:
a plurality of lighting fixtures, each as specified in any of claims 1-6;
a plurality of control circuits, each coupled to the first and second sources of a respective one of the lighting fixtures for establishing output intensity of light output of each of the sources of the respective lighting fixture, so as to set a spectral characteristic of the combined light emitted by the respective lighting fixture; and a master controller communicatively networked to the control circuits, for providing a common control of all light emissions by the lighting fixtures.
17. The lighting network of claim 16, wherein the lighting fixtures are arranged to spell out a word or phrase.
18. A lighting fixture, comprising:
a first of source of light of a first wavelength;
a second source of light of second wavelength, the second wavelength being different from the first wavelength;
an extruded body member;
a diffusely reflective optical integrating cavity formed by at least one first reflective interior surface of the extruded body member, for receiving and combining light of the first and second wavelengths from the sources, and having an aperture for allowing emission of combined light of both the first wavelength and the second wavelength; and a reflective deflector formed by at least one second reflective interior surface of the extruded body member, the reflective deflector having a proximal opening coupled to the aperture of the optical integrating cavity, for directing the combined light emitted through the aperture to a desired region.
19. The lighting fixture of claim 18, wherein the reflective deflector has a shape like a number, character, letter, or symbol, for directing the combined light emitted through the aperture so as to provide a luminous representation of the number, character, letter, or symbol.
20. The lighting fixture of claim 19, wherein the aperture is shaped like a number, character, letter, or symbol.
21. The lighting fixture of claim 19, wherein the at least one second reflective interior surface exhibits a diffuse reflective characteristic with respect to the combined light.
22. The lighting fixture of any of claims 18-21, in combination with control circuitry coupled to the first and second sources for establishing output intensity of light output of each of the sources, so as to set a spectral characteristic of combined light emitted by the fixture.
23. The lighting fixture of any of claims 18-21, wherein:
the first source comprises one or more light emitting diodes for emitting light of a first visible color; and the second source comprises one or more light emitting diodes for emitting light of a second visible color, wherein the second color is different from the first color.
24. The lighting fixture of claim 23, wherein:
the one or more first color light emitting diodes comprise an initially active light emitting diode for emitting light of the first color and an initially inactive light emitting diode for emitting light of the first color on an as needed basis; and the one or more second color light emitting diodes comprises an initially active light emitting diode for emitting light of the second color and an initially inactive light emitting diode for emitting light of the second color on an as needed basis.
25. The lighting fixture of claim 24, further comprising a third source for supplying substantially white light into the optical cavity for combination with the light of the first and second wavelengths.
26. The lighting fixture of claim 25, wherein the third source comprises at least one white light emitting diode, halide light bulb, quartz halogen light bulb, incandescent light bulb or fluorescent light bulb.
27. The lighting fixture of any of claims 18-21, further comprising a third source for supplying light of a third wavelength into the optical cavity for combination with the light of the first and second wavelengths, the third wavelength being different from the first wavelength and from the second wavelength.
28. The lighting fixture of claim 27, wherein:
the first source comprises one or more light emitting diodes for emitting light of a first visible color;
the second source comprises one or more light emitting diodes for emitting light of a second visible color, wherein the second color is different from the first color; and the third source comprises one or more light emitting diodes for emitting light of a third visible color, wherein the third color is different from the first color and from the second color.
29. The lighting fixture of claim 28, wherein the first, second and third colors are red, green and blue, respectively.
30. A plurality of lighting fixtures as specified in any of claims 18-21, wherein:
the reflective deflector in each respective fixture has a shape like a respective number, character, letter, or symbol, for directing the combined light emitted through the aperture so as to provide a visible luminous representation of the respective number, character, letter, or symbol;

the aperture in each respective fixture is shaped like the respective number, character, letter, or symbol; and the plurality of lighting fixtures are arranged to spell out a word or phrase.
31. A lighting network comprising:
a plurality of lighting fixtures, each as specified in any of claims 18-21;
a plurality of control circuits, each coupled to the first and second sources of a respective one of the lighting fixtures for establishing output intensity of light output of each of the sources of the respective lighting fixture, so as to set a spectral characteristic of the combined light emitted by the respective lighting fixture; and a master controller communicatively networked to the control circuits, for providing a common control of all light emissions by the lighting fixtures.
32. The lighting network of claim 31, wherein:
the reflective deflector in each respective fixture has a shape like a respective number, character, letter, or symbol, for directing the combined light emitted through the aperture so as to provide a visible luminous representation of the respective number, character, letter, or symbol;
the aperture in each respective fixture is shaped like the respective number, character, letter, or symbol; and the plurality of lighting fixtures are arranged to spell out a word or phrase.
CA002558961A 2004-04-27 2005-04-25 Optical integrating chamber lighting using multiple color sources for luminous applications Expired - Fee Related CA2558961C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/832,464 2004-04-27
US10/832,464 US6995355B2 (en) 2003-06-23 2004-04-27 Optical integrating chamber lighting using multiple color sources
PCT/US2005/014092 WO2005106963A2 (en) 2004-04-27 2005-04-25 Optical integrating chamber lighting using multiple color sources for luminous applications

Publications (2)

Publication Number Publication Date
CA2558961A1 CA2558961A1 (en) 2005-11-10
CA2558961C true CA2558961C (en) 2009-07-21

Family

ID=35242245

Family Applications (4)

Application Number Title Priority Date Filing Date
CA002680501A Abandoned CA2680501A1 (en) 2004-04-27 2005-04-25 Optical integrating chamber lighting using multiple color sources to adjust white light
CA2558958A Expired - Fee Related CA2558958C (en) 2004-04-27 2005-04-25 Optical integrating chamber lighting using multiple color sources to adjust white light
CA002558961A Expired - Fee Related CA2558961C (en) 2004-04-27 2005-04-25 Optical integrating chamber lighting using multiple color sources for luminous applications
CA002558957A Expired - Fee Related CA2558957C (en) 2004-04-27 2005-04-26 Precise repeatable setting of color characteristics for lighting applications

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA002680501A Abandoned CA2680501A1 (en) 2004-04-27 2005-04-25 Optical integrating chamber lighting using multiple color sources to adjust white light
CA2558958A Expired - Fee Related CA2558958C (en) 2004-04-27 2005-04-25 Optical integrating chamber lighting using multiple color sources to adjust white light

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002558957A Expired - Fee Related CA2558957C (en) 2004-04-27 2005-04-26 Precise repeatable setting of color characteristics for lighting applications

Country Status (5)

Country Link
US (8) US6995355B2 (en)
EP (3) EP1740882A4 (en)
JP (3) JP2007535114A (en)
CA (4) CA2680501A1 (en)
WO (3) WO2005106408A2 (en)

Families Citing this family (272)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040052076A1 (en) * 1997-08-26 2004-03-18 Mueller George G. Controlled lighting methods and apparatus
US6995355B2 (en) * 2003-06-23 2006-02-07 Advanced Optical Technologies, Llc Optical integrating chamber lighting using multiple color sources
US20070051883A1 (en) * 2003-06-23 2007-03-08 Advanced Optical Technologies, Llc Lighting using solid state light sources
US7145125B2 (en) * 2003-06-23 2006-12-05 Advanced Optical Technologies, Llc Integrating chamber cone light using LED sources
US7521667B2 (en) * 2003-06-23 2009-04-21 Advanced Optical Technologies, Llc Intelligent solid state lighting
US20070138978A1 (en) * 2003-06-23 2007-06-21 Advanced Optical Technologies, Llc Conversion of solid state source output to virtual source
US20070235639A1 (en) * 2003-06-23 2007-10-11 Advanced Optical Technologies, Llc Integrating chamber LED lighting with modulation to set color and/or intensity of output
US20070171649A1 (en) * 2003-06-23 2007-07-26 Advanced Optical Technologies, Llc Signage using a diffusion chamber
US20080005944A1 (en) * 2003-06-23 2008-01-10 Advanced Optical Technologies, Llc Signage using a diffusion chamber
US7307704B2 (en) * 2004-04-19 2007-12-11 Carrier Corporation Light delivery control system and method
ATE456000T1 (en) * 2004-08-06 2010-02-15 Koninkl Philips Electronics Nv LED ARRANGEMENT
US7598859B2 (en) * 2004-08-13 2009-10-06 Osram Sylvania Inc. Method and system for controlling lighting
WO2006017890A1 (en) * 2004-08-17 2006-02-23 Jands Pty Ltd Lighting control
US7144131B2 (en) 2004-09-29 2006-12-05 Advanced Optical Technologies, Llc Optical system using LED coupled with phosphor-doped reflective materials
US20060131505A1 (en) * 2004-12-17 2006-06-22 Eastman Kodak Company Imaging element
DE102004060890A1 (en) 2004-12-17 2006-06-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Motor vehicle headlight element
US7316497B2 (en) * 2005-03-29 2008-01-08 3M Innovative Properties Company Fluorescent volume light source
US8388523B2 (en) 2005-04-01 2013-03-05 Welch Allyn, Inc. Medical diagnostic instrument having portable illuminator
DE102005035007B4 (en) * 2005-07-22 2008-03-20 Erco Leuchten Gmbh lamp
US7777955B2 (en) * 2005-07-29 2010-08-17 Optical Research Associates Rippled mixers for uniformity and color mixing
KR20070016541A (en) * 2005-08-04 2007-02-08 삼성전자주식회사 Light generating unit and display device having the same
US20070097358A1 (en) * 2005-11-01 2007-05-03 Oon Chin H System and method for obtaining multi-color optical intensity feedback
US7914173B2 (en) 2005-11-17 2011-03-29 Koninlijke Philips Electronics N.V. Lamp assembly
TWI384182B (en) * 2005-12-12 2013-02-01 Koninkl Philips Electronics Nv Lamp assembly
CN101460779A (en) 2005-12-21 2009-06-17 科锐Led照明技术公司 Lighting device
CN101365929A (en) * 2006-01-09 2009-02-11 皇家飞利浦电子股份有限公司 Light sensor with integrated temperature sensor functionality
US7942548B2 (en) * 2006-01-17 2011-05-17 Mitsubishi Heavy Industries, Ltd. Light-source lamp and projector
RU2008138562A (en) * 2006-02-27 2010-04-10 ВОО ДЗЕОН ГРИН Ко., Лтд. (KR) INTEGRATED LIGHT, SIGN AND INFORMATION DISPLAY
WO2007101336A1 (en) * 2006-03-06 2007-09-13 Les Industries Harnois Inc. Hybrid greenhouse
JP2009530065A (en) * 2006-03-22 2009-08-27 ザ・キュレイターズ・オブ・ザ・ユニバーシティ・オブ・ミズーリ Apparatus and method for evaluating fixation inhibition
US7365991B2 (en) * 2006-04-14 2008-04-29 Renaissance Lighting Dual LED board layout for lighting systems
US7777166B2 (en) 2006-04-21 2010-08-17 Cree, Inc. Solid state luminaires for general illumination including closed loop feedback control
US7625103B2 (en) * 2006-04-21 2009-12-01 Cree, Inc. Multiple thermal path packaging for solid state light emitting apparatus and associated assembling methods
CN101438339B (en) * 2006-05-04 2012-12-05 皇家飞利浦电子股份有限公司 Lighting device with an array of controlled emitters with shared control and feedback
JP4944948B2 (en) * 2006-05-05 2012-06-06 クリー インコーポレイテッド Lighting device
US7846391B2 (en) 2006-05-22 2010-12-07 Lumencor, Inc. Bioanalytical instrumentation using a light source subsystem
US7695164B2 (en) * 2006-05-24 2010-04-13 Osram Gesellschaft Mit Beschraenkter Haftung Illumination system for imaging illumination with a high level of homogeneity
US7530710B2 (en) * 2006-05-24 2009-05-12 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Color-tunable illumination system for imaging illumination
JP4805026B2 (en) * 2006-05-29 2011-11-02 シャープ株式会社 LIGHT EMITTING DEVICE, DISPLAY DEVICE, AND LIGHT EMITTING DEVICE CONTROL METHOD
US20070279914A1 (en) * 2006-06-02 2007-12-06 3M Innovative Properties Company Fluorescent volume light source with reflector
US20070280622A1 (en) * 2006-06-02 2007-12-06 3M Innovative Properties Company Fluorescent light source having light recycling means
WO2008006205A1 (en) * 2006-07-13 2008-01-17 Tir Technology Lp Light source and method for optimising illumination characteristics thereof
US7759882B2 (en) * 2006-07-31 2010-07-20 Microsemi Corp.—Analog Mixed Signal Group Ltd. Color control for scanning backlight
JP2008042329A (en) * 2006-08-02 2008-02-21 Canon Inc Image reader, and control method thereof
EP2062015A1 (en) * 2006-08-25 2009-05-27 Philips Intellectual Property & Standards GmbH Optical lighting device
JP2008059887A (en) * 2006-08-31 2008-03-13 Sony Corp Planar light source device and liquid crystal display device assembly
JP4801159B2 (en) * 2006-08-31 2011-10-26 京セラ株式会社 Light source driving circuit, light source component including the light source driving circuit, and display device
US8207686B2 (en) * 2006-09-05 2012-06-26 The Sloan Company, Inc. LED controller and method using variable drive currents
ES2529431T3 (en) * 2006-09-06 2015-02-20 Koninklijke Philips N.V. Lighting control
US7607798B2 (en) * 2006-09-25 2009-10-27 Avago Technologies General Ip (Singapore) Pte. Ltd. LED lighting unit
US7857457B2 (en) * 2006-09-29 2010-12-28 3M Innovative Properties Company Fluorescent volume light source having multiple fluorescent species
US7794114B2 (en) * 2006-10-11 2010-09-14 Cree, Inc. Methods and apparatus for improved heat spreading in solid state lighting systems
US8363069B2 (en) 2006-10-25 2013-01-29 Abl Ip Holding Llc Calibration method and apparatus for lighting fixtures using multiple spectrum light sources and light mixing
KR101284041B1 (en) * 2006-11-03 2013-07-09 삼성디스플레이 주식회사 Light emitting module
US7654716B1 (en) 2006-11-10 2010-02-02 Doheny Eye Institute Enhanced visualization illumination system
CN101617411B (en) * 2006-11-30 2012-07-11 科锐公司 Lighting device and lighting method
JP2008140704A (en) * 2006-12-04 2008-06-19 Stanley Electric Co Ltd Led backlight
US20080136770A1 (en) * 2006-12-07 2008-06-12 Microsemi Corp. - Analog Mixed Signal Group Ltd. Thermal Control for LED Backlight
EP2106198A1 (en) * 2006-12-08 2009-09-30 Sharp Kabushiki Kaisha Light source and light irradiating device
US20100039804A1 (en) * 2006-12-20 2010-02-18 Koninklijke Philips Electronics N.V. Illuminating device
JP4948546B2 (en) * 2006-12-21 2012-06-06 パイオニア株式会社 Organic EL light emitting device
US7845822B2 (en) * 2006-12-29 2010-12-07 Koninklijke Philips Electronics N.V. Illumination device including a color selecting panel for recycling unwanted light
US7498753B2 (en) * 2006-12-30 2009-03-03 The Boeing Company Color-compensating Fluorescent-LED hybrid lighting
CN101222797B (en) * 2007-01-08 2011-06-01 香港应用科技研究院有限公司 Light emitting diode backlight system and method capable of adjusting color range
EP2111137A4 (en) * 2007-02-12 2013-03-06 Ge Lighting Solutions Llc Led lighting systems for product display cases
US8258682B2 (en) * 2007-02-12 2012-09-04 Cree, Inc. High thermal conductivity packaging for solid state light emitting apparatus and associated assembling methods
WO2008098360A1 (en) * 2007-02-16 2008-08-21 Koninklijke Philips Electronics N.V. Optical system for luminaire
WO2008106590A2 (en) 2007-02-28 2008-09-04 Doheny Eye Institute Portable handheld illumination system
US20080219017A1 (en) * 2007-03-06 2008-09-11 Lear Corporation Multi-Color to White Light-Emitting Diode for Map Pocket Light
CN201007456Y (en) * 2007-03-06 2008-01-16 欧阳杰 Lighting device with LED as light source
US20080228508A1 (en) * 2007-03-13 2008-09-18 Renaissance Lighting, Inc. Monitoring connect time and time of operation of a solid state lighting device
US7560677B2 (en) * 2007-03-13 2009-07-14 Renaissance Lighting, Inc. Step-wise intensity control of a solid state lighting system
US7478922B2 (en) * 2007-03-14 2009-01-20 Renaissance Lighting, Inc. Set-point validation for color/intensity settings of light fixtures
US20080238338A1 (en) * 2007-03-30 2008-10-02 Stephen Andrew Latham Method and system for providing scalable and configurable illumination
US20080266846A1 (en) * 2007-04-24 2008-10-30 Computime, Ltd. Solar Lamp with a Variable Display
RU2502135C2 (en) * 2007-05-24 2013-12-20 Конинклейке Филипс Электроникс Н.В. System and method for automatically creating specific atmosphere by controlling contributions of sensorial perceptible stimulus means
JP5291094B2 (en) * 2007-05-24 2013-09-18 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Color variable lighting system
JP5290279B2 (en) * 2007-05-29 2013-09-18 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Lighting system, lighting fixture and backlighting unit
EP2156223B1 (en) * 2007-06-04 2011-12-21 Koninklijke Philips Electronics N.V. Color-tunable illumination system, lamp and luminaire
WO2008149310A2 (en) * 2007-06-05 2008-12-11 Udayan Kanade A programmable light source
CN101743488B (en) 2007-07-17 2014-02-26 科锐公司 Optical elements with internal optical features and methods of fabricating same
US8197079B2 (en) * 2007-07-18 2012-06-12 Ruud Lighting, Inc. Flexible LED lighting systems, fixtures and method of installation
US8098375B2 (en) * 2007-08-06 2012-01-17 Lumencor, Inc. Light emitting diode illumination system
DE202007011973U1 (en) * 2007-08-27 2009-01-02 Ruppel, Stefan LED cluster arrangement with constant current switch
TW200910287A (en) * 2007-08-31 2009-03-01 Ledtech Electronics Corp Array type light-emitting device with high color rendering index
TWI331397B (en) * 2007-09-03 2010-10-01 Ledtech Electronics Corp Array type light-emitting device with high color rendering index
JP4390854B2 (en) * 2007-09-14 2009-12-24 株式会社浅葱クリエイト Lighting device
US7806569B2 (en) * 2007-09-28 2010-10-05 Osram Sylvania Inc. Lighting system with removable light modules
US7984999B2 (en) 2007-10-17 2011-07-26 Xicato, Inc. Illumination device with light emitting diodes and moveable light adjustment member
US9086213B2 (en) * 2007-10-17 2015-07-21 Xicato, Inc. Illumination device with light emitting diodes
JP4452737B2 (en) * 2007-10-25 2010-04-21 大塚電子株式会社 Luminometer and measuring method
US20090122566A1 (en) * 2007-11-13 2009-05-14 Glen Cunningham Vehicle tail light assembly and method of use
DE102007059133B4 (en) 2007-12-07 2023-04-06 OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung Substrate for an LED submount, LED submount and LED light source
CN101904178A (en) * 2007-12-19 2010-12-01 皇家飞利浦电子股份有限公司 Loudspeaker cover
EP2076096A1 (en) * 2007-12-24 2009-07-01 Tecnolux Italia S.A.S. di Benito Tacconi e C. Illumination device and process for adjusting the brightness of the light emitted by said illumination device
CN102016401A (en) * 2007-12-24 2011-04-13 本杰明·摩尔公司 System for representing colors including an integrating light capsule
US8432584B2 (en) * 2007-12-26 2013-04-30 Lexmark International, Inc. Scanner and system employing composite illumination
TW200933075A (en) * 2008-01-21 2009-08-01 Jiahn-Chang Wu Reflection type lamp
US9151884B2 (en) * 2008-02-01 2015-10-06 3M Innovative Properties Company Fluorescent volume light source with active chromphore
DE102008015039A1 (en) * 2008-03-14 2009-09-24 OBE OHNMACHT & BAUMGäRTNER GMBH & CO. KG Device and method for the diffuse illumination of a linear area
US9155170B2 (en) * 2008-03-20 2015-10-06 Cooper Technologies Company Conductive magnetic coupling system
JP2009229757A (en) * 2008-03-21 2009-10-08 Leds Craft Co Ltd Open type led channel character
JP5113573B2 (en) * 2008-03-24 2013-01-09 パナソニック株式会社 LED lighting device
US20090290343A1 (en) * 2008-05-23 2009-11-26 Abl Ip Holding Inc. Lighting fixture
US8172424B2 (en) * 2009-05-01 2012-05-08 Abl Ip Holding Llc Heat sinking and flexible circuit board, for solid state light fixture utilizing an optical cavity
US7845825B2 (en) * 2009-12-02 2010-12-07 Abl Ip Holding Llc Light fixture using near UV solid state device and remote semiconductor nanophosphors to produce white light
US8021008B2 (en) * 2008-05-27 2011-09-20 Abl Ip Holding Llc Solid state lighting using quantum dots in a liquid
US7980728B2 (en) 2008-05-27 2011-07-19 Abl Ip Holding Llc Solid state lighting using light transmissive solid in or forming optical integrating volume
US8028537B2 (en) * 2009-05-01 2011-10-04 Abl Ip Holding Llc Heat sinking and flexible circuit board, for solid state light fixture utilizing an optical cavity
US8212469B2 (en) 2010-02-01 2012-07-03 Abl Ip Holding Llc Lamp using solid state source and doped semiconductor nanophosphor
CN102057214B (en) * 2008-06-10 2014-09-03 皇家飞利浦电子股份有限公司 Light output device and method
US20090315478A1 (en) * 2008-06-19 2009-12-24 Mccolgin Jerry L Lighting system having master and slave lighting fixtures
US8240875B2 (en) * 2008-06-25 2012-08-14 Cree, Inc. Solid state linear array modules for general illumination
DE102008031987A1 (en) * 2008-07-07 2010-04-15 Osram Gesellschaft mit beschränkter Haftung lighting device
KR101004532B1 (en) * 2008-07-18 2010-12-31 재단법인 한국조명연구원 Lighting Device using a LED Lamp
US8288951B2 (en) 2008-08-19 2012-10-16 Plextronics, Inc. Organic light emitting diode lighting systems
WO2010022105A2 (en) * 2008-08-19 2010-02-25 Plextronics, Inc. Organic light emitting diode products
WO2010022101A2 (en) * 2008-08-19 2010-02-25 Plextronics, Inc. Organic light emitting diode lighting devices
TWI537900B (en) * 2008-08-19 2016-06-11 索爾維美國有限公司 User configurable mosaic light emitting apparatus
WO2010025738A1 (en) * 2008-09-05 2010-03-11 Martin Professional A/S Light fixture with an electrodeless plasma source
WO2010030173A1 (en) * 2008-09-10 2010-03-18 Eldolab Holding B.V. Lighting assembly for an image capturing system comprising led elements
JP5536075B2 (en) * 2008-10-10 2014-07-02 コーニンクレッカ フィリップス エヌ ヴェ Method and apparatus for controlling multiple light sources with a single regulator circuit to provide light of variable color and / or color temperature
US20100098399A1 (en) * 2008-10-17 2010-04-22 Kurt Breish High intensity, strobed led micro-strip for microfilm imaging system and methods
WO2010064168A2 (en) * 2008-12-05 2010-06-10 Koninklijke Philips Electronics N.V. Method and system of controlling illumination characteristics of a plurality of lighting segments
CN101761796B (en) * 2008-12-24 2012-07-18 富准精密工业(深圳)有限公司 Light emitting diode lamp
EP2315003B1 (en) * 2009-01-20 2017-11-29 Otsuka Electronics Co., Ltd. Quantum efficiency measuring device and quantum efficiency measuring method
US7600882B1 (en) * 2009-01-20 2009-10-13 Lednovation, Inc. High efficiency incandescent bulb replacement lamp
US8242462B2 (en) * 2009-01-23 2012-08-14 Lumencor, Inc. Lighting design of high quality biomedical devices
US8653737B2 (en) * 2009-04-14 2014-02-18 Phoseon Technology, Inc. Controller for semiconductor lighting device
TWI402571B (en) * 2009-04-22 2013-07-21 Advanced Optoelectronic Tech Backlight module with complementary color zone
DE102009018428A1 (en) * 2009-04-22 2010-10-28 Vishay Electronic Gmbh Circuit for a light-emitting diode arrangement and light-emitting diode module
JP5286571B2 (en) * 2009-05-22 2013-09-11 大塚電子株式会社 Total luminous flux measuring apparatus and total luminous flux measuring method
KR100934202B1 (en) * 2009-05-26 2009-12-29 김동영 LED level meter by self-power generation and its measuring method
US8836532B2 (en) * 2009-07-16 2014-09-16 Gentex Corporation Notification appliance and method thereof
WO2011010429A1 (en) * 2009-07-24 2011-01-27 パナソニック株式会社 Cooking appliance
US8098433B2 (en) * 2009-12-11 2012-01-17 Solatube International, Inc. Direct and indirect light diffusing devices and methods
US8568011B2 (en) 2009-08-20 2013-10-29 Solatube International, Inc. Daylighting devices with auxiliary lighting system and light turning features
US9713211B2 (en) 2009-09-24 2017-07-18 Cree, Inc. Solid state lighting apparatus with controllable bypass circuits and methods of operation thereof
US8777449B2 (en) * 2009-09-25 2014-07-15 Cree, Inc. Lighting devices comprising solid state light emitters
US9285103B2 (en) 2009-09-25 2016-03-15 Cree, Inc. Light engines for lighting devices
DE102009047788A1 (en) 2009-09-30 2011-03-31 Osram Opto Semiconductors Gmbh Lighting device for a camera and method for operating the same
EP2499425A1 (en) 2009-11-11 2012-09-19 Danmarks Tekniske Universitet Diffusely radiating led light system
US20110115407A1 (en) * 2009-11-13 2011-05-19 Polar Semiconductor, Inc. Simplified control of color temperature for general purpose lighting
US20110127555A1 (en) * 2009-12-02 2011-06-02 Renaissance Lighting, Inc. Solid state light emitter with phosphors dispersed in a liquid or gas for producing high cri white light
US8118454B2 (en) 2009-12-02 2012-02-21 Abl Ip Holding Llc Solid state lighting system with optic providing occluded remote phosphor
US8217406B2 (en) * 2009-12-02 2012-07-10 Abl Ip Holding Llc Solid state light emitter with pumped nanophosphors for producing high CRI white light
US9163802B2 (en) * 2009-12-02 2015-10-20 Abl Ip Holding Llc Lighting fixtures using solid state device and remote phosphors to produce white light
US20110154700A1 (en) * 2009-12-29 2011-06-30 Chris Ioakimidis Illuminated sign for electronic devices
CA2729481A1 (en) * 2010-01-30 2011-07-30 Koninklijke Philips Electronics N.V. Lighting control system for a plurality of luminaires
US9719012B2 (en) * 2010-02-01 2017-08-01 Abl Ip Holding Llc Tubular lighting products using solid state source and semiconductor nanophosphor, E.G. for florescent tube replacement
US20110199765A1 (en) * 2010-02-12 2011-08-18 Abl Ip Holding Llc Linear LED Lamp
WO2011100756A1 (en) 2010-02-15 2011-08-18 Abl Ip Holding Llc Constructive occlusion lighting system and applications thereof
US8517550B2 (en) * 2010-02-15 2013-08-27 Abl Ip Holding Llc Phosphor-centric control of color of light
US8205998B2 (en) * 2010-02-15 2012-06-26 Abl Ip Holding Llc Phosphor-centric control of solid state lighting
US8128262B2 (en) 2010-03-30 2012-03-06 Abl Ip Holdings Llc Lighting applications with light transmissive optic contoured to produce tailored light output distribution
US8322884B2 (en) 2010-03-31 2012-12-04 Abl Ip Holding Llc Solid state lighting with selective matching of index of refraction
WO2011123622A1 (en) * 2010-04-01 2011-10-06 Wavien, Inc. Led illumination system with recycled light
US8330394B2 (en) * 2010-04-09 2012-12-11 Young Lighting Technology Inc. Light source of LED and method for producing light source with varying color while dimming
US8297798B1 (en) 2010-04-16 2012-10-30 Cooper Technologies Company LED lighting fixture
US8089207B2 (en) * 2010-05-10 2012-01-03 Abl Ip Holding Llc Lighting using solid state device and phosphors to produce light approximating a black body radiation spectrum
EP2662057B1 (en) 2010-05-13 2018-10-17 Doheny Eye Institute Self contained illuminated infusion cannula systems
US8601757B2 (en) 2010-05-27 2013-12-10 Solatube International, Inc. Thermally insulating fenestration devices and methods
US20110299854A1 (en) * 2010-06-07 2011-12-08 Greenwave Reality, Inc. Light Bulb with IR Transmitter
US11274808B2 (en) 2010-06-17 2022-03-15 Rtc Industries, Inc. LED lighting assembly and method of lighting for a merchandise display
US9222645B2 (en) 2010-11-29 2015-12-29 RTC Industries, Incorporated LED lighting assembly and method of lighting for a merchandise display
EP2583269A4 (en) * 2010-06-17 2014-12-31 Light Bohrd Llc Systems and methods for luminescent display
EP2583535A1 (en) * 2010-06-18 2013-04-24 B/E Aerospace Inc. Modular light emitting diode system for vehicle illumination
WO2011163672A2 (en) * 2010-06-25 2011-12-29 Axlen Technologies, Inc. Adjustable solid state illumination module having array of light pixels
US9101036B2 (en) 2010-08-20 2015-08-04 Research Triangle Institute Photoluminescent nanofiber composites, methods for fabrication, and related lighting devices
US9441811B2 (en) 2010-08-20 2016-09-13 Research Triangle Institute Lighting devices utilizing optical waveguides and remote light converters, and related methods
KR20130099951A (en) 2010-08-20 2013-09-06 리서치 트라이앵글 인스티튜트, 인터내셔널 Color-tunable lighting devices and methods for tunning color output of lighting devices
US10883702B2 (en) * 2010-08-31 2021-01-05 Ideal Industries Lighting Llc Troffer-style fixture
KR101762320B1 (en) * 2010-09-07 2017-07-27 엘지이노텍 주식회사 Illumination device
US20120140463A1 (en) * 2010-12-07 2012-06-07 Kinzer David J Led profile luminaire
DE102011050873A1 (en) 2010-12-08 2012-06-14 Schott Ag Display device e.g. 7-segment display, for use in cooking surface of modern glass ceramic cooking appliance, has optical compensation filter arranged between glass ceramic front side and light that is arranged in rear side region
DE202010013087U1 (en) * 2010-12-08 2011-02-24 Schott Ag display
KR101499369B1 (en) 2010-12-08 2015-03-05 쇼오트 아게 Display
US8820959B2 (en) * 2011-01-03 2014-09-02 Michael O. Nevins Hybrid source lighting system
US8389957B2 (en) 2011-01-14 2013-03-05 Lumencor, Inc. System and method for metered dosage illumination in a bioanalysis or other system
US8466436B2 (en) 2011-01-14 2013-06-18 Lumencor, Inc. System and method for metered dosage illumination in a bioanalysis or other system
DE102011002960B3 (en) * 2011-01-21 2012-04-26 Osram Ag Solar simulator and method for operating a solar simulator
US10178723B2 (en) * 2011-06-03 2019-01-08 Cree, Inc. Systems and methods for controlling solid state lighting devices and lighting apparatus incorporating such systems and/or methods
AT511114B1 (en) * 2011-02-25 2015-11-15 Hierzer Andreas LIGHT RAIL SYSTEM
CN102651933A (en) * 2011-02-28 2012-08-29 欧司朗股份有限公司 Lighting device and method for automatically controlling color temperature of lights emitted by same
WO2012148651A2 (en) 2011-04-08 2012-11-01 Brite Shot, Inc. Led array lighting assembly
DE102011102567B4 (en) * 2011-05-26 2023-05-25 OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung lighting device
US9839083B2 (en) 2011-06-03 2017-12-05 Cree, Inc. Solid state lighting apparatus and circuits including LED segments configured for targeted spectral power distribution and methods of operating the same
DE202011110029U1 (en) 2011-06-06 2012-10-08 Schott Ag display device
WO2013011405A1 (en) * 2011-07-15 2013-01-24 Koninklijke Philips Electronics N.V. Controller for light-emitting devices
WO2013010579A1 (en) * 2011-07-18 2013-01-24 Osram Ag Lamp element and lamp arrangement
US8928240B2 (en) 2011-08-16 2015-01-06 Abl Ip Holding Llc Method and system for driving organic LED's
US8760074B2 (en) 2011-08-25 2014-06-24 Abl Ip Holding Llc Tunable white luminaire
US8928249B2 (en) 2011-08-25 2015-01-06 Abl Ip Holding Llc Reducing lumen variability over a range of color temperatures of an output of tunable-white LED lighting devices
US8736186B2 (en) 2011-11-14 2014-05-27 Cree, Inc. Solid state lighting switches and fixtures providing selectively linked dimming and color control and methods of operating
CN103930714B (en) * 2011-11-17 2016-08-24 皇家飞利浦有限公司 There is the mixed uniformly LED-based direct-view illuminator of light output
WO2013082183A1 (en) 2011-11-30 2013-06-06 Solatube International, Inc. Daylight collection systems and methods
US9347623B2 (en) * 2011-12-27 2016-05-24 Koninklijke Philips N.V. Reflector device and lighting device comprising such a reflector device
US20140355243A1 (en) * 2011-12-27 2014-12-04 Koninklijke Philips N.V. Lighting device comprising a reflector device
US10663652B2 (en) 2011-12-30 2020-05-26 Fraen Corporation Light mixing systems with a glass light pipe
US9995872B2 (en) 2011-12-30 2018-06-12 Fraen Corporation Light mixing systems with a glass light pipe
US9642515B2 (en) 2012-01-20 2017-05-09 Lumencor, Inc. Solid state continuous white light source
US9167656B2 (en) 2012-05-04 2015-10-20 Abl Ip Holding Llc Lifetime correction for aging of LEDs in tunable-white LED lighting devices
US10251233B2 (en) 2012-05-07 2019-04-02 Micron Technology, Inc. Solid state lighting systems and associated methods of operation and manufacture
DE102012209131A1 (en) * 2012-05-31 2013-12-05 Osram Gmbh LIGHTING DEVICE WITH SEMICONDUCTOR LIGHT SOURCES AND COMMON DIFFUSER
JP6004767B2 (en) * 2012-06-14 2016-10-12 三菱電機株式会社 Light source device
US9217561B2 (en) 2012-06-15 2015-12-22 Lumencor, Inc. Solid state light source for photocuring
JP5479543B2 (en) 2012-07-19 2014-04-23 大塚電子株式会社 Optical property measuring device
US9980343B1 (en) * 2012-08-20 2018-05-22 Peter Sussman Tunable white light box
US9921397B2 (en) 2012-12-11 2018-03-20 Solatube International, Inc. Daylight collectors with thermal control
US8982467B2 (en) 2012-12-11 2015-03-17 Solatube International, Inc. High aspect ratio daylight collectors
TW201424649A (en) * 2012-12-19 2014-07-01 Hon Hai Prec Ind Co Ltd Electrical censer
US10231300B2 (en) 2013-01-15 2019-03-12 Cree, Inc. Systems and methods for controlling solid state lighting during dimming and lighting apparatus incorporating such systems and/or methods
US9402292B1 (en) * 2013-07-10 2016-07-26 Musco Corporation Providing, measuring and demonstrating highly effective uplighting
CN103383102A (en) * 2013-08-07 2013-11-06 安徽三安光电有限公司 Light-emitting device and control method thereof
EP3044633B1 (en) * 2013-09-11 2020-11-04 Heraeus Noblelight America LLC Large area high-uniformity uv source with many small emitters
US9976725B2 (en) * 2013-09-20 2018-05-22 Osram Sylvania Inc. Solid-state luminaire with pixelated control of light beam distribution
EP2851610B1 (en) * 2013-09-20 2017-04-26 Osram Sylvania Inc. Solid-state luminaire with electronically adjustable light beam distribution
JP6045725B2 (en) * 2014-01-02 2016-12-14 フィリップス ライティング ホールディング ビー ヴィ Light emitting module
US9662409B2 (en) 2014-05-23 2017-05-30 Abl Ip Holding Llc Combinatorial light device for general lighting and lighting with beneficial wavelengths
US9696200B2 (en) 2014-05-23 2017-07-04 Abl Ip Holding Llc Combinatorial light device for general lighting and lighting for machine vision
JP2014150293A (en) * 2014-05-30 2014-08-21 Mitsubishi Electric Corp Light-emitting device
DE102014018940A1 (en) * 2014-12-22 2016-06-23 Sata Gmbh & Co. Kg Apparatus and method for assessing surfaces, in particular of paint or lacquer surfaces
US9816675B2 (en) 2015-03-18 2017-11-14 Solatube International, Inc. Daylight collectors with diffuse and direct light collection
AU2016232714A1 (en) 2015-03-18 2017-10-26 Solatube International, Inc. Daylight collectors with diffuse and direct light collection
US9719852B2 (en) * 2015-05-13 2017-08-01 Datacolor Holding Ag System and method for compensating light source drift at different wavelengths with a single reference channel in a light measuring device
EP3325401A1 (en) 2015-07-17 2018-05-30 ABL IP Holding LLC Systems and methods to provide configuration data to a software configurable lighting device
US10349488B2 (en) 2015-07-17 2019-07-09 Abl Ip Holding Llc Software configurable lighting device
DE102015114955A1 (en) * 2015-09-07 2017-03-09 Cruse Spezialmaschinen GmbH Lighting system and imaging device
JP6611036B2 (en) * 2015-09-10 2019-11-27 パナソニックIpマネジメント株式会社 Light emitting device and light source for illumination
US10100984B2 (en) * 2015-10-15 2018-10-16 GE Lighting Solutions, LLC Indirect light mixing LED module for point-source applications
CN109315050B (en) 2016-01-28 2020-05-29 生态照明公司 Method for producing tunable white light with high color rendering
US10492264B2 (en) 2016-01-28 2019-11-26 EcoSense Lighting, Inc. Lighting systems for providing tunable white light with functional diode emissions
EP3214763B1 (en) * 2016-03-01 2023-09-06 Aptiv Technologies Limited Actuation plate with icon illumination for a sensor switch button
KR101793384B1 (en) * 2016-07-22 2017-11-03 주식회사 루멘스 Lighting apparatus
US9801250B1 (en) 2016-09-23 2017-10-24 Feit Electric Company, Inc. Light emitting diode (LED) lighting device or lamp with configurable light qualities
US10893587B2 (en) 2016-09-23 2021-01-12 Feit Electric Company, Inc. Light emitting diode (LED) lighting device or lamp with configurable light qualities
US10141533B2 (en) 2016-10-31 2018-11-27 B/E Aerospace, Inc. Quantum dot-based lighting system for an aircraft
US9868390B1 (en) * 2016-10-31 2018-01-16 B/E Aerospace, Inc. LED lighting assembly using a dynamic color mixing scheme
EP3336417B1 (en) * 2016-12-15 2020-04-08 Signify Holding B.V. Visible and uv lighting system
CN206432177U (en) * 2016-12-23 2017-08-22 台湾太豪企业股份有限公司 The double-colored keycap of light-permeable
US10091855B2 (en) 2017-01-13 2018-10-02 ETi Solid State Lighting Inc. Manually controllable LED correlated color temperature light fixture
US20180231211A1 (en) * 2017-01-17 2018-08-16 Nulite Lighting Novel Reflector Lighting Fixtures
US10620447B2 (en) * 2017-01-19 2020-04-14 Cognex Corporation System and method for reduced-speckle laser line generation
US10393355B2 (en) 2017-03-02 2019-08-27 International Business Machines Corporation Lighting pattern optimization for a task performed in a vicinity
WO2018229022A1 (en) * 2017-06-13 2018-12-20 Philips Lighting Holding B.V. Led module for emitting signals
DE102017006756B4 (en) * 2017-07-17 2019-11-07 Emz-Hanauer Gmbh & Co. Kgaa Color temperature variable lighting device and household electrical appliance with such a lighting device
ES2859494T3 (en) 2017-07-21 2021-10-04 Signify Holding Bv Light emitting module
JP6723964B2 (en) * 2017-09-25 2020-07-15 Eizo株式会社 Atmosphere temperature estimation device, atmosphere temperature estimation method, program and system
WO2019139637A1 (en) 2018-01-11 2019-07-18 Ecosense Lighting Inc. Multi-channel systems for providing tunable light with high color rendering and biological effects
US10674579B2 (en) 2018-01-26 2020-06-02 Abl Ip Holding Llc Lighting fixture with selectable color temperature
JP2019186087A (en) * 2018-04-12 2019-10-24 シャープ株式会社 Light source device, illumination equipment and projector equipment
US10856384B2 (en) 2018-05-29 2020-12-01 Abl Ip Holding Llc Lighting system with configurable color temperatures
US10585292B2 (en) 2018-06-28 2020-03-10 Fraen Corporation Low-profile color-mixing lightpipe
US10448471B1 (en) 2018-06-29 2019-10-15 Abl Ip Holding Llc Lighting system with configurable dimming
US10952292B2 (en) 2018-08-09 2021-03-16 Abl Ip Holding Llc Programmable driver for variable light intensity
US11102858B2 (en) * 2018-10-30 2021-08-24 Rockwell Collins, Inc. Controllable micro light emitting diode system and method
US11282276B2 (en) 2018-11-16 2022-03-22 Contraventum, Llc Collaborative light show authoring for tessellated geometries
US10874006B1 (en) 2019-03-08 2020-12-22 Abl Ip Holding Llc Lighting fixture controller for controlling color temperature and intensity
CN110013231B (en) * 2019-04-24 2021-08-24 中国计量大学上虞高等研究院有限公司 Sleep environment illumination condition identification method
CN109998497B (en) * 2019-04-24 2021-08-06 中国计量大学上虞高等研究院有限公司 Sleep-in detection and judgment system in luminous environment
US11259377B2 (en) 2019-05-17 2022-02-22 Abl Ip Holding Llc Color temperature and intensity configurable lighting fixture using de-saturated color LEDs
CN110231748A (en) * 2019-06-13 2019-09-13 江苏理工学院 Lighting device for machine vision
CA3096225C (en) 2019-10-17 2022-11-15 Abl Ip Holding Llc Selectable lighting intensity and color temperature using luminaire lens
US11828455B2 (en) 2019-12-06 2023-11-28 Bae Systems Plc Light source
JP7082149B2 (en) * 2020-02-25 2022-06-07 矢崎総業株式会社 Lighting equipment
US11641708B2 (en) 2020-08-28 2023-05-02 Abl Ip Holding Llc Light fixture controllable via dual networks
US11083061B1 (en) 2020-10-16 2021-08-03 Abl Ip Holding Llc Systems to control light output characteristics of a lighting device
US11564302B2 (en) 2020-11-20 2023-01-24 Feit Electric Company, Inc. Controllable multiple lighting element fixture
US11147136B1 (en) 2020-12-09 2021-10-12 Feit Electric Company, Inc. Systems and apparatuses for configurable and controllable under cabinet lighting fixtures
EP4019917A1 (en) * 2020-12-23 2022-06-29 OTT HydroMet B.V. Pyranometer and method of detecting a soiling on a dome in a pyranometer
KR102566752B1 (en) * 2021-08-13 2023-08-17 주식회사 신코 Microplate fluorescence measurement device with improved light source
US11796140B1 (en) * 2022-08-15 2023-10-24 Alliance Sports Group, L.P. Lighting device having a vivid and dulling light source with controlled duty cycling thereof

Family Cites Families (172)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1911576A (en) * 1933-05-30 Traffic signal
US737411A (en) * 1903-05-11 1903-08-25 William F Coakley Box-fastener.
US3385434A (en) * 1965-09-21 1968-05-28 Mandrel Industries Apparatus for classifying objects according to their internal structure
US3780357A (en) * 1973-02-16 1973-12-18 Hewlett Packard Co Electroluminescent semiconductor display apparatus and method of fabricating the same
US4677533A (en) 1984-09-05 1987-06-30 Mcdermott Julian A Lighting fixture
US4962687A (en) 1988-09-06 1990-10-16 Belliveau Richard S Variable color lighting system
US4992704A (en) 1989-04-17 1991-02-12 Basic Electronics, Inc. Variable color light emitting diode
JPH0352782U (en) * 1989-09-29 1991-05-22
US5365084A (en) 1991-02-20 1994-11-15 Pressco Technology, Inc. Video inspection system employing multiple spectrum LED illumination
US5241459A (en) * 1992-06-01 1993-08-31 Eastman Kodak Company Integrating cylinder with end input illumination for use as an illuminator in a film scanner
AU6034394A (en) 1993-02-11 1994-08-29 Louis A. Phares Controlled lighting system
AU6245594A (en) * 1993-02-18 1994-09-14 Tomico Products, Inc. Low wattage light-enhancing collar
US5471052A (en) 1993-10-25 1995-11-28 Eaton Corporation Color sensor system using a secondary light receiver
JP3229472B2 (en) * 1993-12-22 2001-11-19 キヤノン株式会社 Ink jet recording head and ink jet recording apparatus
US5453849A (en) * 1994-02-07 1995-09-26 Unisys Corporation Integrating cylinder for object illumination
US5400228A (en) 1994-07-12 1995-03-21 Kao; Pin-Chi Full color illuminating unit
US5899557A (en) 1994-08-11 1999-05-04 Mcdermott; Kevin Multi-source lighting device
JPH08180978A (en) * 1994-12-22 1996-07-12 Matsushita Electric Works Ltd Variable color lighting system
US5757111A (en) 1995-04-03 1998-05-26 Sato; Giichiro Night light with phosphorescent element
JP3677814B2 (en) * 1995-05-26 2005-08-03 松下電工株式会社 Lighting control device
US5650843A (en) * 1995-10-19 1997-07-22 Eastman Kodak Company Feedback control apparatus for a light integrating cavity
US5608213A (en) * 1995-11-03 1997-03-04 The United States Of America As Represented By The Secretary Of The Air Force Spectral distribution emulation
US5733028A (en) 1996-01-23 1998-03-31 Advanced Optical Technologies, Llc. Apparatus for projecting electromagnetic radiation with a tailored intensity distribution
US6334700B2 (en) 1996-01-23 2002-01-01 Advanced Optical Technologies, L.L.C. Direct view lighting system with constructive occlusion
US5705804A (en) 1996-01-23 1998-01-06 Science Applications International Corporation Quadrant light detector
US6238077B1 (en) 1996-01-23 2001-05-29 Advanced Optical Technologies, L.L.C. Apparatus for projecting electromagnetic radiation with a tailored intensity distribution
US5773819A (en) 1996-01-23 1998-06-30 Advanced Optical Technologies, Llc. Single element light detector
US6043873A (en) 1997-01-10 2000-03-28 Advanced Optical Technologies, Llc Position tracking system
US6064061A (en) 1998-03-31 2000-05-16 Advanced Optical Technologies, L.L.C. Enhancements in radiant energy transducer systems
US5803592A (en) * 1996-11-22 1998-09-08 Austin Air Systems Limited Light source
US5966393A (en) 1996-12-13 1999-10-12 The Regents Of The University Of California Hybrid light-emitting sources for efficient and cost effective white lighting and for full-color applications
US6808859B1 (en) 1996-12-31 2004-10-26 Hyundai Electronics Industries Co., Ltd. ArF photoresist copolymers
US5914487A (en) 1997-01-22 1999-06-22 Advanced Optical Technologies, Llc Radiant energy transducing apparatus with constructive occlusion
US6626558B2 (en) 1997-02-28 2003-09-30 Electro Optical Sciences Inc. Apparatus for uniform illumination of an object
WO1998039805A1 (en) 1997-03-03 1998-09-11 Koninklijke Philips Electronics N.V. White light-emitting diode
US5752766A (en) 1997-03-11 1998-05-19 Bailey; James Tam Multi-color focusable LED stage light
US6007209A (en) 1997-03-19 1999-12-28 Teledyne Industries, Inc. Light source for backlighting
US5838247A (en) 1997-04-01 1998-11-17 Bladowski; Witold S. Solid state light system
US5877849A (en) 1997-05-12 1999-03-02 Advanced Optical Technologies, Llc Object detection system
US6975079B2 (en) 1997-08-26 2005-12-13 Color Kinetics Incorporated Systems and methods for controlling illumination sources
US6967448B2 (en) 1997-08-26 2005-11-22 Color Kinetics, Incorporated Methods and apparatus for controlling illumination
US7064498B2 (en) * 1997-08-26 2006-06-20 Color Kinetics Incorporated Light-emitting diode based products
US6292901B1 (en) 1997-08-26 2001-09-18 Color Kinetics Incorporated Power/data protocol
US6806659B1 (en) 1997-08-26 2004-10-19 Color Kinetics, Incorporated Multicolored LED lighting method and apparatus
US6888322B2 (en) 1997-08-26 2005-05-03 Color Kinetics Incorporated Systems and methods for color changing device and enclosure
US6016038A (en) 1997-08-26 2000-01-18 Color Kinetics, Inc. Multicolored LED lighting method and apparatus
US6965205B2 (en) 1997-08-26 2005-11-15 Color Kinetics Incorporated Light emitting diode based products
US6869204B2 (en) 1997-08-26 2005-03-22 Color Kinetics Incorporated Light fixtures for illumination of liquids
US20020113555A1 (en) * 1997-08-26 2002-08-22 Color Kinetics, Inc. Lighting entertainment system
US6548967B1 (en) * 1997-08-26 2003-04-15 Color Kinetics, Inc. Universal lighting network methods and systems
US6608453B2 (en) 1997-08-26 2003-08-19 Color Kinetics Incorporated Methods and apparatus for controlling devices in a networked lighting system
US6211626B1 (en) 1997-08-26 2001-04-03 Color Kinetics, Incorporated Illumination components
US6936978B2 (en) 1997-08-26 2005-08-30 Color Kinetics Incorporated Methods and apparatus for remotely controlled illumination of liquids
US6717376B2 (en) 1997-08-26 2004-04-06 Color Kinetics, Incorporated Automotive information systems
US7038398B1 (en) * 1997-08-26 2006-05-02 Color Kinetics, Incorporated Kinetic illumination system and methods
US6528954B1 (en) * 1997-08-26 2003-03-04 Color Kinetics Incorporated Smart light bulb
US6459919B1 (en) 1997-08-26 2002-10-01 Color Kinetics, Incorporated Precision illumination methods and systems
US6624597B2 (en) 1997-08-26 2003-09-23 Color Kinetics, Inc. Systems and methods for providing illumination in machine vision systems
US6781329B2 (en) 1997-08-26 2004-08-24 Color Kinetics Incorporated Methods and apparatus for illumination of liquids
US20030133292A1 (en) 1999-11-18 2003-07-17 Mueller George G. Methods and apparatus for generating and modulating white light illumination conditions
US7014336B1 (en) 1999-11-18 2006-03-21 Color Kinetics Incorporated Systems and methods for generating and modulating illumination conditions
US6720745B2 (en) 1997-08-26 2004-04-13 Color Kinetics, Incorporated Data delivery track
US6897624B2 (en) 1997-08-26 2005-05-24 Color Kinetics, Incorporated Packaged information systems
US6774584B2 (en) * 1997-08-26 2004-08-10 Color Kinetics, Incorporated Methods and apparatus for sensor responsive illumination of liquids
US6777891B2 (en) * 1997-08-26 2004-08-17 Color Kinetics, Incorporated Methods and apparatus for controlling devices in a networked lighting system
US6007225A (en) 1997-10-16 1999-12-28 Advanced Optical Technologies, L.L.C. Directed lighting system utilizing a conical light deflector
US6222172B1 (en) * 1998-02-04 2001-04-24 Photobit Corporation Pulse-controlled light emitting diode source
JPH11297480A (en) * 1998-04-14 1999-10-29 Moriyama Sangyo Kk Color lighting method, and color lighting system
US6607794B1 (en) 1998-04-16 2003-08-19 Alliedsignal Inc. Light-reflecting molded articles and methods of making the same
US6224237B1 (en) * 1998-04-16 2001-05-01 Honeywell International Inc. Structure for achieving a linear light source geometry
US6220730B1 (en) * 1998-07-01 2001-04-24 Light & Sound Design, Ltd. Illumination obscurement device
US6793374B2 (en) 1998-09-17 2004-09-21 Simon H. A. Begemann LED lamp
TW417842U (en) * 1998-09-28 2001-01-01 Koninkl Philips Electronics Nv Lighting system
ES2299260T5 (en) * 1998-09-28 2011-12-20 Koninklijke Philips Electronics N.V. LIGHTING SYSTEM.
US6149283A (en) 1998-12-09 2000-11-21 Rensselaer Polytechnic Institute (Rpi) LED lamp with reflector and multicolor adjuster
US6219140B1 (en) * 1998-12-16 2001-04-17 Eastman Kodak Company Apparatus for compensation for spectral fluctuation of a light source and a scanner incorporating said apparatus
US6127783A (en) 1998-12-18 2000-10-03 Philips Electronics North America Corp. LED luminaire with electronically adjusted color balance
US6273589B1 (en) 1999-01-29 2001-08-14 Agilent Technologies, Inc. Solid state illumination source utilizing dichroic reflectors
US6299329B1 (en) 1999-02-23 2001-10-09 Hewlett-Packard Company Illumination source for a scanner having a plurality of solid state lamps and a related method
US6183086B1 (en) 1999-03-12 2001-02-06 Bausch & Lomb Surgical, Inc. Variable multiple color LED illumination system
US6200002B1 (en) 1999-03-26 2001-03-13 Philips Electronics North America Corp. Luminaire having a reflector for mixing light from a multi-color array of leds
JP2000321126A (en) 1999-05-14 2000-11-24 Canon Inc Integrating sphere and spectroscopic measuring apparatus employing it
US6257737B1 (en) 1999-05-20 2001-07-10 Philips Electronics Na Low-profile luminaire having a reflector for mixing light from a multi-color linear array of LEDs
US6786625B2 (en) 1999-05-24 2004-09-07 Jam Strait, Inc. LED light module for vehicles
US6139166A (en) 1999-06-24 2000-10-31 Lumileds Lighting B.V. Luminaire having beam splitters for mixing light from different color ' LEDs
TW498148B (en) * 1999-06-25 2002-08-11 Koninkl Philips Electronics Nv Vehicle headlamp and a vehicle
US6280054B1 (en) 1999-07-02 2001-08-28 Zight Corporation Image generator having an improved illumination system
US6442718B1 (en) * 1999-08-23 2002-08-27 Sun Microsystems, Inc. Memory module test system with reduced driver output impedance
US6222623B1 (en) 1999-09-03 2001-04-24 Mars Incorporated Integrating light mixer
JP3427017B2 (en) * 1999-09-17 2003-07-14 シルバーメイキング株式会社 Sign letters or graphics with internal lighting
US6686691B1 (en) 1999-09-27 2004-02-03 Lumileds Lighting, U.S., Llc Tri-color, white light LED lamps
US6361192B1 (en) * 1999-10-25 2002-03-26 Global Research & Development Corp Lens system for enhancing LED light output
US6422718B1 (en) * 1999-11-18 2002-07-23 Integrated Systems Technologies Limited Non-imaging light source for uniform illumination applications
US6184628B1 (en) 1999-11-30 2001-02-06 Douglas Ruthenberg Multicolor led lamp bulb for underwater pool lights
US6357889B1 (en) 1999-12-01 2002-03-19 General Electric Company Color tunable light source
US6513949B1 (en) 1999-12-02 2003-02-04 Koninklijke Philips Electronics N.V. LED/phosphor-LED hybrid lighting systems
US6286979B1 (en) 2000-02-24 2001-09-11 David P. Ramer Constructive occlusion lighting system with ported cavity and fan structure
JP2001249207A (en) * 2000-03-06 2001-09-14 Minolta Co Ltd Light mixing device, illumination device and device for measuring reflection characteristic
US6621239B1 (en) * 2000-03-14 2003-09-16 Richard S. Belliveau Method and apparatus for controlling the temperature of a multi-parameter light
US6357893B1 (en) * 2000-03-15 2002-03-19 Richard S. Belliveau Lighting devices using a plurality of light sources
DE20007134U1 (en) * 2000-04-18 2000-08-17 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Luminaire with adjustable color location
JP2001307502A (en) * 2000-04-25 2001-11-02 R D S Kk Spot-light and light source unit
US6744693B2 (en) * 2000-05-03 2004-06-01 N.V. Adb Ttv Technologies Sa Lighting fixture
TWI240788B (en) * 2000-05-04 2005-10-01 Koninkl Philips Electronics Nv Illumination system, light mixing chamber and display device
US6733139B2 (en) * 2000-06-05 2004-05-11 Hewlett-Packard Development Company, L.P. Projector with narrow-spectrum light source to complement broad-spectrum light source
JP2002008405A (en) * 2000-06-21 2002-01-11 Moritex Corp Lighting equipment and lighting optical system
US7202613B2 (en) * 2001-05-30 2007-04-10 Color Kinetics Incorporated Controlled lighting methods and apparatus
JP4288553B2 (en) * 2000-07-25 2009-07-01 富士フイルム株式会社 Camera strobe device
WO2002011497A1 (en) * 2000-07-27 2002-02-07 Color Kinetics Incorporated Lighting control using speech recognition
US6527411B1 (en) 2000-08-01 2003-03-04 Visteon Corporation Collimating lamp
AU2001285408A1 (en) 2000-08-07 2002-02-18 Color Kinetics Incorporated Automatic configuration systems and methods for lighting and other applications
US7042172B2 (en) * 2000-09-01 2006-05-09 Color Kinetics Incorporated Systems and methods for providing illumination in machine vision systems
US6636003B2 (en) 2000-09-06 2003-10-21 Spectrum Kinetics Apparatus and method for adjusting the color temperature of white semiconduct or light emitters
JP5030345B2 (en) 2000-09-29 2012-09-19 三洋電機株式会社 Semiconductor device
JP2002163907A (en) 2000-11-24 2002-06-07 Moriyama Sangyo Kk Lighting system and lighting unit
US20020064043A1 (en) 2000-11-29 2002-05-30 Tb Optical Co., Ltd. Light source of illumination for light guide
US6441558B1 (en) * 2000-12-07 2002-08-27 Koninklijke Philips Electronics N.V. White LED luminary light control system
US6547416B2 (en) 2000-12-21 2003-04-15 Koninklijke Philips Electronics N.V. Faceted multi-chip package to provide a beam of uniform white light from multiple monochrome LEDs
JP3496644B2 (en) 2001-01-12 2004-02-16 シーシーエス株式会社 Lighting equipment for inspection
US6523977B2 (en) 2001-02-20 2003-02-25 Prokia Technology Co., Ltd. Illuminating apparatus including a plurality of light sources that generate primary color light components
US7038399B2 (en) * 2001-03-13 2006-05-02 Color Kinetics Incorporated Methods and apparatus for providing power to lighting devices
US6801003B2 (en) 2001-03-13 2004-10-05 Color Kinetics, Incorporated Systems and methods for synchronizing lighting effects
US6510995B2 (en) * 2001-03-16 2003-01-28 Koninklijke Philips Electronics N.V. RGB LED based light driver using microprocessor controlled AC distributed power system
US6836083B2 (en) 2001-03-23 2004-12-28 Matsushita Electric Industrial Co., Ltd. Illumination light supply system
US6883929B2 (en) 2001-04-04 2005-04-26 Color Kinetics, Inc. Indication systems and methods
JP3940596B2 (en) * 2001-05-24 2007-07-04 松下電器産業株式会社 Illumination light source
US6700112B2 (en) 2001-05-29 2004-03-02 Advanced Optical Technologies, Llc High-reflectance paint for high-intensity optical applications
US6614013B2 (en) 2001-05-30 2003-09-02 Watt Stopper, Inc. Illumination management system
US6840652B1 (en) 2001-07-31 2005-01-11 Hi-Lite Safety Systems, L.C. Lighting enhanced by magnified reflective surfaces
US6985163B2 (en) * 2001-08-14 2006-01-10 Sarnoff Corporation Color display device
GB2369730B (en) 2001-08-30 2002-11-13 Integrated Syst Tech Ltd Illumination control system
US6525668B1 (en) 2001-10-10 2003-02-25 Twr Lighting, Inc. LED array warning light system
US6630801B2 (en) 2001-10-22 2003-10-07 Lümileds USA Method and apparatus for sensing the color point of an RGB LED white luminary using photodiodes
EP1321902B1 (en) * 2001-12-20 2015-08-12 MEI, Inc. Currency acceptor and light source for use therein
US6851834B2 (en) 2001-12-21 2005-02-08 Joseph A. Leysath Light emitting diode lamp having parabolic reflector and diffuser
JP3760865B2 (en) * 2002-01-08 2006-03-29 日産自動車株式会社 Vehicle headlamp
JP2005038605A (en) * 2002-02-12 2005-02-10 Daisei Denki Kk Lighting apparatus
US6759814B2 (en) 2002-03-28 2004-07-06 Eastman Kodak Company Illuminator and method of making same
US7168833B2 (en) * 2002-04-05 2007-01-30 General Electric Company Automotive headlamps with improved beam chromaticity
DE10216085A1 (en) 2002-04-11 2003-11-06 Sill Franz Gmbh Color changing spotlights
PT1502483E (en) * 2002-05-09 2009-03-10 Philips Solid State Lighting Led dimming controller
US7159986B2 (en) * 2002-05-20 2007-01-09 Swales & Associates, Inc. Wide field collimator
JP3952168B2 (en) * 2002-06-11 2007-08-01 富士通株式会社 Electronic device, liquid crystal display device and light guide plate
JP2005530349A (en) * 2002-06-13 2005-10-06 クリー インコーポレイテッド Emitter package with saturation conversion material
US8100552B2 (en) * 2002-07-12 2012-01-24 Yechezkal Evan Spero Multiple light-source illuminating system
DE10233768A1 (en) * 2002-07-25 2004-02-12 Philips Intellectual Property & Standards Gmbh Lamp system with green-blue gas discharge lamp and yellow-red LED
JP4083516B2 (en) * 2002-09-03 2008-04-30 株式会社小糸製作所 Vehicle headlamp
US7114834B2 (en) 2002-09-23 2006-10-03 Matrix Railway Corporation LED lighting apparatus
KR100628264B1 (en) * 2002-09-26 2006-09-27 엘지.필립스 엘시디 주식회사 back light unit of liquid crystal display device
US6966206B2 (en) * 2002-10-10 2005-11-22 John D. Brush & Co., Inc. Snap-in lock retention system for a safe
US6744223B2 (en) 2002-10-30 2004-06-01 Quebec, Inc. Multicolor lamp system
US20040151008A1 (en) * 2003-02-03 2004-08-05 Artsyukhovich Alexander N. Variable spot size illuminators with enhanced homogeneity and parfocality
US20040188594A1 (en) 2003-05-01 2004-09-30 Brown Steven W. Spectrally tunable solid-state light source
US6960872B2 (en) 2003-05-23 2005-11-01 Goldeneye, Inc. Illumination systems utilizing light emitting diodes and light recycling to enhance output radiance
US7040774B2 (en) * 2003-05-23 2006-05-09 Goldeneye, Inc. Illumination systems utilizing multiple wavelength light recycling
US6869206B2 (en) * 2003-05-23 2005-03-22 Scott Moore Zimmerman Illumination systems utilizing highly reflective light emitting diodes and light recycling to enhance brightness
JP4438457B2 (en) * 2003-05-28 2010-03-24 株式会社日立製作所 Storage area allocation method, system, and virtualization apparatus
US6995355B2 (en) 2003-06-23 2006-02-07 Advanced Optical Technologies, Llc Optical integrating chamber lighting using multiple color sources
US20070235639A1 (en) * 2003-06-23 2007-10-11 Advanced Optical Technologies, Llc Integrating chamber LED lighting with modulation to set color and/or intensity of output
US7521667B2 (en) 2003-06-23 2009-04-21 Advanced Optical Technologies, Llc Intelligent solid state lighting
US7145125B2 (en) 2003-06-23 2006-12-05 Advanced Optical Technologies, Llc Integrating chamber cone light using LED sources
CA2533195C (en) * 2003-07-22 2011-05-10 Tir Systems Ltd. System and method for the diffusion of illumination produced by discrete light sources
CA2533209A1 (en) * 2003-07-23 2005-01-27 Tir Systems Ltd. Control system for an illumination device incorporating discrete light sources
US7157111B2 (en) * 2003-09-30 2007-01-02 Sharp Laboratories Of America, Inc. MOCVD selective deposition of C-axis oriented PB5GE3O11 thin films on In2O3 oxides
US7121690B1 (en) 2004-02-26 2006-10-17 Advanced Optical Technologies, Llc Constructive occlusion with a transmissive component
US7108413B2 (en) 2004-03-11 2006-09-19 Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. Sampling for color control feedback using an optical cable
US7025464B2 (en) * 2004-03-30 2006-04-11 Goldeneye, Inc. Projection display systems utilizing light emitting diodes and light recycling
US7012382B2 (en) * 2004-04-30 2006-03-14 Tak Meng Cheang Light emitting diode based light system with a redundant light source
US7048385B2 (en) * 2004-06-16 2006-05-23 Goldeneye, Inc. Projection display systems utilizing color scrolling and light emitting diodes
US7202608B2 (en) * 2004-06-30 2007-04-10 Tir Systems Ltd. Switched constant current driving and control circuit
EP1779708B1 (en) * 2004-08-06 2021-06-30 Signify Holding B.V. Lighting system including photonic emission and detection using light-emitting elements
US7144131B2 (en) 2004-09-29 2006-12-05 Advanced Optical Technologies, Llc Optical system using LED coupled with phosphor-doped reflective materials

Also Published As

Publication number Publication date
CA2558958C (en) 2010-11-16
WO2005105381A3 (en) 2006-04-06
WO2005106408A3 (en) 2006-05-04
US7604375B2 (en) 2009-10-20
JP2007535116A (en) 2007-11-29
EP1740350A2 (en) 2007-01-10
US20060203483A1 (en) 2006-09-14
WO2005106408A2 (en) 2005-11-10
US20050161586A1 (en) 2005-07-28
CA2558961A1 (en) 2005-11-10
WO2005106963A3 (en) 2006-05-26
US7374311B2 (en) 2008-05-20
EP1740883A4 (en) 2008-07-30
US7148470B2 (en) 2006-12-12
CA2558958A1 (en) 2005-11-10
CA2680501A1 (en) 2005-11-10
EP1740883A2 (en) 2007-01-10
US20060081773A1 (en) 2006-04-20
US20090109669A1 (en) 2009-04-30
US7497590B2 (en) 2009-03-03
EP1740882A2 (en) 2007-01-10
EP1740350A4 (en) 2008-07-30
CA2558957C (en) 2010-01-12
WO2005106963A2 (en) 2005-11-10
US20080205053A1 (en) 2008-08-28
US7883239B2 (en) 2011-02-08
JP2007535115A (en) 2007-11-29
WO2005105381A2 (en) 2005-11-10
US20100008087A1 (en) 2010-01-14
US20060268543A1 (en) 2006-11-30
JP2007535114A (en) 2007-11-29
US20060268544A1 (en) 2006-11-30
US6995355B2 (en) 2006-02-07
EP1740882A4 (en) 2008-08-06
CA2558957A1 (en) 2005-11-10
US7625098B2 (en) 2009-12-01

Similar Documents

Publication Publication Date Title
CA2558961C (en) Optical integrating chamber lighting using multiple color sources for luminous applications
US20070051883A1 (en) Lighting using solid state light sources
US7157694B2 (en) Integrating chamber cone light using LED sources
US20070138978A1 (en) Conversion of solid state source output to virtual source
US8222584B2 (en) Intelligent solid state lighting
US20070235639A1 (en) Integrating chamber LED lighting with modulation to set color and/or intensity of output
US20060237636A1 (en) Integrating chamber LED lighting with pulse amplitude modulation to set color and/or intensity of output
US20070171649A1 (en) Signage using a diffusion chamber
US20080005944A1 (en) Signage using a diffusion chamber

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20200831