CA2395402A1 - Solid state lamp - Google Patents

Solid state lamp Download PDF

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Publication number
CA2395402A1
CA2395402A1 CA002395402A CA2395402A CA2395402A1 CA 2395402 A1 CA2395402 A1 CA 2395402A1 CA 002395402 A CA002395402 A CA 002395402A CA 2395402 A CA2395402 A CA 2395402A CA 2395402 A1 CA2395402 A1 CA 2395402A1
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CA
Canada
Prior art keywords
light
lamp
disperser
light source
separator
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.)
Granted
Application number
CA002395402A
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French (fr)
Other versions
CA2395402C (en
Inventor
Eric J. Tarsa
Brian Thibeault
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Wolfspeed Inc
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Individual
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Filing date
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Publication of CA2395402A1 publication Critical patent/CA2395402A1/en
Application granted granted Critical
Publication of CA2395402C publication Critical patent/CA2395402C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/68—Details of reflectors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/767—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having directions perpendicular to the light emitting axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/20—Dichroic filters, i.e. devices operating on the principle of wave interference to pass specific ranges of wavelengths while cancelling others
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light 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
    • G02B6/0008—Light 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/30—Semiconductor lasers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/505—Wavelength conversion elements characterised by the shape, e.g. plate or foil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • H01L33/60—Reflective elements

Abstract

The invention provides a new solid state lamp (10) emitting a light useful f or room illumination and other applications. It comprises a solid state Light Source (12) which transmits light through a Separator (14) to a Disperser (1 6) that disperses the light in a desired pattern and/or changes its color. In o ne embodiment, the Light Source (12) is a blue emitting LED operating with current high enough for room illumination, the Separator (14) is a light pip e or fiber optic device, and the Disperser (16) disperses the light radially a nd converts some of the blue light to yellow to produce a white light mixture. The Separator (14) spaces the Light Source a sufficient distance from the Disperser (16) such that heat from the Light Source (12) will not transfer t o the Disperser (16) when the Light Source (12) is carrying elevated currents necessary for room illumination.

Claims (38)

1. A lamp, comprising:
a light source (12);
a disperser (16) that scatters, focuses, or directs light passing through its and a separator (14), said light source (12) and disperser (16) spaced apart by said separator (14), at least some of the light from said light source (12) directed along said separator (14) and through said disperser (16).
2. The lamp of claim 1, wherein said disperser (16) scatters light in a predefined pattern.
3. The lamp of claim 1, wherein said disperser (16) scatters light in a spherical pattern.
4. The lamp of claim 1, wherein said disperser (16) contains material to change the wavelength of at least some of the light passing through it.
5. The lamp of claim 1, wherein said light source (12) is at least one light emitting diode or at least one laser (31).
6. The lamp of claim 1, wherein said separator (14) spaces said light source (12) and disperser (16) a sufficient distance to prevent substantial heat transfer from said light source (12) to said disperser (16).
7. The lamp of claim 1, wherein said light source (12) emits an output light flux sufficient for illumination.
8. The lamp of claim 1, further comprising an at least partially transparent enclosure (63) surrounding said light source (12), separator (14), and disperser (16).
9. The lamp of claim 8, wherein said enclosure (63) changes the wavelength of at least some of the light from said light source (12).
10. The lamp of claim 8, wherein said enclosure (63) disperses light from said light source (12).
11. The lamp of claim 1, further comprising a reflective lamp enclosure (61), said disperser (62) positioned within said lamp enclosure (61) such that at least some of the light from said disperser (62) reflects off said lamp enclosure (61) as a directional beam.
12. The lamp of claim 1, wherein said separator (14) scatters, disperses, redirects, or wavelength converts at least some of said light from said light source (12).
13. The lamp of claim 4, wherein said light source (12) is an LED or laser that emits blue light and said disperser (53) converts the wavelength of some of said blue light to yellow light, whereby said disperser (53) emits a white light combination of blue and yellow.
14. The lamp of claim 13, wherein said disperser (53) includes at least one of said yellow emitting phosphor, flourescent dye, or flourescent polymer to produce said wavelength conversion.
15. The lamp of claim 4, wherein said light source (12) is a LED or laser (31) emitting light of one wavelength, said disperser (16) converting substantially all of the light to one or more different wavelengths.
16. The lamp of claim 4, wherein said light source (12) emits ultraviolet light, said disperser (16) converting substantially all of the ultraviolet light to colors that combine to produce white light.
17. The lamp of claim 1, further comprising a heat sink (39) around said light source (12) to draw away heat generated by said light source (12).
18. The lamp of claim 1, wherein said disperser (54) further comprises at least one optical element (55) to shape the light through it.
19. The lamp of claim 1, wherein said disperser (56) further comprises at least one mask or other patterned surface to shape the light emitted from said disperser.
20. The lamp of claim 1, wherein said disperser (52) further comprises materials to scatter at least some of the light passing through it.
21. A lamp, comprising:
a light source (12);
a disperser (16) that mixes and disperses light passing through it; and a separator (14), said light source 912) and disperser (16) spaced apart by said separator (14) a sufficient distance to prevent substantial heat transfer from said light source (12) to said disperser (16), at least some of the light from said light source (12) directed along said separator (14) and through said disperser (16).
22. The lamp of claim 21, wherein said light source (31) comprises at least one light emitting diode.
23. The lamp of claim 21, wherein said light source (31) comprises at least one laser.
24. The lamp of claim 21, wherein said light source (31a,31b) comprises at least two light emitting diodes, the light from said diodes (31a,31b) mixing in said separator (23) and disperser (16) such that said lamp emits a combination of light from said LEDs.
25. The lamp of claim 24, wherein a current is respectively applied to said LEDs (31a,31b) causing them to emit light, said respective currents manipulated to control combination of light emitted from said lamp.
26. The lamp of claim 21, wherein said light source (31a,31b) emits blue and yellow light, said disperser (16) emitting a white light combination of blue and yellow.
27. The lamp of claim 21, wherein said light source (12) emits red, green, and blue light, said disperser (16) emitting a white light combination of red, green, and blue.
28. The lamp of claim 21, further comprising an at least partially transparent enclosure (63) surrounding said light source (12), separator (14), and disperser (16).
29. The lamp of claim 21, wherein said enclosure (63) scatters light from said light source (12).
30. The lamp of claim 21, wherein said enclosure (63) changes the wavelength at least some of the light from said light source (12).
31. The lamp of claim 21, further comprising a reflective lamp enclosure (61), said disperser (62) positioned within said lamp enclosure (61) such that at least some of the light from said disperser (62) reflects off said lamp enclosure (61) as a directional beam.
32. The lamp of claim 21, further comprising a heat sink (39) around said light source (12) to draw away heat generated by said light source.
33. The lamp of claim 21, wherein said disperser (54) contains optical elements (55) to shape the light emitting from said disperser (54).
34. The lamp of claim 21, wherein said disperser contains at least one mask (56) to shape the light emitted from said disperser.
35. A lamp, comprising:
a light source (47) comprising at least one solid state laser;
a disperser (49) that mixes and disperses light passing through it; and a separator comprising (48a,48b), said light source (47) and disperser (49) mounted on and spaced apart by said separator (48a,48b), at least some of the light from said light source (47) directed through said disperser (49).
36. The lamp of claim 35, wherein said separator (48a,48b) comprises one or more offset rods.
37. The lamp of claim 35, wherein said separator (48a,48b) comprises a hollow tube.
38. The lamp of claim 35, wherein said solid state laser (47) emits an output light flux sufficient for room illumination.

40. A lamp, comprising:
a light source (12) comprising at least one light emitting diode that emits on output light flux sufficient for room illumination;
a disperser (16) that disperses light passing through it;
a separator (14), said light source (12) and disperser (16) spaced apart by said separator (14) a sufficient distance to prevent substantial heat transfer from said light source (12) to said disperser (16), at least some of the light from said light source (12) directed along said separator (14) and through said disperser (16);
a lamp enclosure (63) that is a least partially transparent and containing materials to change the wavelength of at least some of the light which passes through it, said enclosure surrounding said light source (12), separator (14) and disperser (16) such that light dispersed by said disperser (16) passes through said enclosure (63).

41. The lamp of claim 40, wherein said light source (12) is a blue light emitting diode or laser and said lamp enclosure (63) includes a wavelength converting material which changes some of said blue light to yellow light, whereby said disperses (14) emits a white light combination of blue and yellow.

42. The lamp of claim 40, wherein said enclosure (63), disperses (16), or separator (14) includes yellow phosphor to produce said wavelength conversion.

43. The lamp of claim 40, wherein said enclosure (63), disperses (16), or separator (14) includes a flourescent dye or polymer to produce said wavelength conversion.

44. The lamp of claim 40, wherein said light source (12) is an ultraviolet light emitting diode or laser, said lamp enclosure (63), disperses (16), or separator (14) includes a wavelength converting material which converts substantially all of the ultraviolet light to colors which combine to produce colored or white light.

45. A multiple element lamp, comprising:
at least two individual lamps (42,43) whose light mixes to produce the light from said multiple element lamp, each said individual lamp comprising:
a light source (12);
a disperses (16) that scatters, focuses, or directs light passing through it; and an elongated separator (14), said light source (12) and disperses (16) spaced apart by said separator (14), at least some of the light from said light source (12) directed along said separator (14) and through said disperses (16).

46. The lamp of claim 45, having two said individual lamps (42,43) wherein one said individual lamp (42) emits blue light and the other said individual lamp emits yellow light (43) such that said multiple element lamp emits white light.

47. The lamp of claim 45, having three individual lamps, emitting red, green, and blue light, said multiple element lamp emitting a white light combination of red, green, and blue.

48. The lamp of claim 45, wherein a current is applied to each said individual lamp (42,43) causing them to emit light, the current applied to said individual lamps (42,43) manipulated to control the color of light emitted from said multiple element lamp.

49. A method for producing disperse light, comprising:
generating light at a first location (12);
transmitting at least some of the light (14) to another location (16) which is out of substantial heat transfer communication with said first location; and scattering or converting the wavelength of some of the light at said other location (16), and dispersing all of the light.
CA2395402A 1999-12-03 2000-11-08 Solid state lamp Expired - Lifetime CA2395402C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US16881899P 1999-12-03 1999-12-03
US60/168,818 1999-12-03
US09/537,531 2000-03-29
US09/537,531 US6350041B1 (en) 1999-12-03 2000-03-29 High output radial dispersing lamp using a solid state light source
PCT/US2000/030593 WO2001040702A1 (en) 1999-12-03 2000-11-08 Solid state lamp

Publications (2)

Publication Number Publication Date
CA2395402A1 true CA2395402A1 (en) 2001-06-07
CA2395402C CA2395402C (en) 2011-04-05

Family

ID=26864481

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2395402A Expired - Lifetime CA2395402C (en) 1999-12-03 2000-11-08 Solid state lamp

Country Status (13)

Country Link
US (1) US6350041B1 (en)
EP (2) EP1234139B1 (en)
JP (2) JP2003515899A (en)
KR (1) KR100757762B1 (en)
CN (1) CN1204356C (en)
AT (1) ATE423293T1 (en)
AU (1) AU1586901A (en)
CA (1) CA2395402C (en)
DE (1) DE60041591D1 (en)
HK (1) HK1048655B (en)
MY (1) MY124220A (en)
TW (1) TW512215B (en)
WO (1) WO2001040702A1 (en)

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JP5478575B2 (en) 2014-04-23

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