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Número de publicaciónUSRE45796 E1
Tipo de publicaciónConcesión
Número de solicitudUS 13/169,359
Fecha de publicación10 Nov 2015
Fecha de presentación27 Jun 2011
Fecha de prioridad23 Dic 2004
También publicado comoUS7322732, US20060139945, USRE42598, WO2006071494A1
Número de publicación13169359, 169359, US RE45796 E1, US RE45796E1, US-E1-RE45796, USRE45796 E1, USRE45796E1
InventoresGerald H. Negley, Antony P. Van de Ven, Norbert Hiller
Cesionario originalCree, Inc.
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Light emitting diode arrays for direct backlighting of liquid crystal displays
US RE45796 E1
Resumen
A display panel for a flat panel display includes a planar array of LCD devices and a planar array of LED devices that is closely spaced apart from the planar array of LCD devices, at least some of the LED devices being disposed within a periphery of the array of LCD devices such that, in operation, the planar array of LED devices provides backlighting for the planar array of LCD devices. The planar array of LED devices can include at least one solid metal block having first and second opposing metal faces. The first metal face includes therein an array of reflector cavities, and the second metal face includes therein heat sink fins that are exposed at the back face of the flat panel display.
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Reclamaciones(54)
What is claimed is:
1. A display panel for a flat panel display comprising:
a front face comprising a planar array of liquid crystal display (LCD) devices; and
a back face comprising at least one solid metal block including first and second opposing metal faces that extend parallel to the array of LCD devices, wherein the first metal face is facing toward the array of LCD devices and the second metal face is facing away from the array of LCD devices, the first metal face including therein an array of reflector cavities and the second metal face including therein a plurality of heat sink fins that are exposed at the back face of the flat panel display; and
at least one LED device mounted in a respective reflector cavity such that, in operation, the reflector cavity reflects light that is emitted by the at least one LED device that is mounted therein away from the reflector cavity;
wherein the at least one solid metal block comprises a plurality of solid metal block tiles that are arranged in an array that is congruent to the planar array of LCD devices.
2. A display panel according to claim 1 in combination with a frame that is configured to surround the front and back faces of the display panel.
3. A display panel according to claim 2 in further combination with an electronics module that is supported by the frame and that is configured to control the array of LCD devices and the at least one LED device.
4. A display panel according to claim 1 wherein the planar array of LCD devices is at least 17 inches in size along a diagonal thereof.
5. A display panel according to claim 1 wherein the at least one LED device is configured to emit light that appears as white light.
6. A display panel according to claim 5 wherein the at least one LED device that is mounted in a respective reflector cavity and that is configured to emit light that appears as white light consists of:
a red LED device;
a blue LED device; and
two green LED devices.
7. A display panel according to claim 6 wherein the two green LED devices emit green light at different frequencies.
8. A display panel according to claim 1 further comprising:
a planar optical film that is located between the planar array of LCD devices and the at least one LED device such that, in operation, the at least one LED device transmits light through the planar optical film and to the planar array of LCD devices.
9. A display panel according to claim 1 in combination with other electrical and/or mechanical elements to provide a computer monitor and/or a television.
10. A display panel for a flat panel display comprising:
a front face comprising a planar array of liquid crystal display (LCD) devices; and
a back face comprising at least one solid metal block including first and second opposing metal faces that extend parallel to the array of LCD devices, wherein the first metal face is facing toward the array of LCD devices and the second metal face is facing away from the array of LCD devices, the first metal face including therein an array of reflector cavities and the second metal face including therein a plurality of heat sink fins that are exposed at the back face of the flat panel display; and
at least one LED device mounted in a respective reflector cavity such that, in operation, the reflector cavity reflects light that is emitted by the at least one LED device that is mounted therein away from the reflector cavity;
wherein the at least one solid metal block comprises a plurality of solid metal block bars that are arranged face-to-face to be congruent to the planar array of LCD devices.
11. A display panel according to claim 10 in combination with a frame that is configured to surround the front and back faces of the display panel.
12. A display panel according to claim 11 in further combination with an electronics module that is supported by the frame and that is configured to control the array of LCD devices and the at least one LED device.
13. A display panel according to claim 10 wherein the planar array of LCD devices is at least 17 inches in size along a diagonal thereof.
14. A display panel according to claim 10 wherein the at least one LED device is configured to emit light that appears as white light.
15. A display panel according to claim 14 wherein the at least one LED device that is mounted in a respective reflector cavity and that is configured to emit light that appears as white light consists of:
a red LED device;
a blue LED device; and
two green LED devices.
16. A display panel according to claim 15 wherein the two green LED devices emit green light at different frequencies.
17. A display panel according to claim 10 further comprising:
a planar optical film that is located between the planar array of LCD devices and the at least one LED device such that, in operation, the at least one LED device transmits light through the planar optical film and to the planar array of LCD devices.
18. A display panel according to claim 10 in combination with other electrical and/or mechanical elements to provide a computer monitor and/or a television.
19. A display panel for a flat panel display comprising:
a front face comprising a planar array of liquid crystal display (LCD) devices; and
a back face comprising at least one solid metal block including first and second opposing metal faces that extend parallel to the array of LCD devices, wherein the first metal face is facing toward the array of LCD devices and the second metal face is facing away from the array of LCD devices, the second metal face including therein a plurality of heat sink fins that are exposed at the back face of the flat panel display; and
a plurality of LED devices mounted on the first metal face;
wherein the at least one solid metal block comprises a plurality of solid metal block tiles that are arranged in an array that is congruent to the planar array of LCD devices.
20. A display panel according to claim 19 in combination with a frame that is configured to surround the front and back faces of the display panel.
21. A display panel according to claim 20 in further combination with an electronics module that is supported by the frame and that is configured to control the array of LCD devices and the at least one LED device.
22. A display panel according to claim 19 wherein the planar array of LCD devices is at least 17 inches in size along a diagonal thereof.
23. A display panel according to claim 19 wherein the at least one LED device is configured to emit light that appears as white light.
24. A display panel according to claim 23 wherein the at least one LED device that is mounted in a respective reflector cavity and that is configured to emit light that appears as white light consists of:
a red LED device;
a blue LED device; and
two green LED devices.
25. A display panel according to claim 24 wherein the two green LED devices emit green light at different frequencies.
26. A display panel according to claim 19 further comprising:
a planar optical film that is located between the planar array of LCD devices and the at least one LED device such that, in operation, the at least one LED device transmits light through the planar optical film and to the planar array of LCD devices.
27. A display panel according to claim 19 in combination with other electrical and/or mechanical elements to provide a computer monitor and/or a television.
28. A display panel for a flat panel display comprising:
a front face comprising a planar array of liquid crystal display (LCD) devices; and
a back face comprising at least one solid metal block including first and second opposing metal faces that extend parallel to the array of LCD devices, wherein the first metal face is facing toward the array of LCD devices and the second metal face is facing away from the array of LCD devices, the second metal face including therein a plurality of heat sink fins that are exposed at the back face of the flat panel display; and
a plurality of LED devices mounted on the first metal face;
wherein the at least one solid metal block comprises a plurality of solid metal block bars that are arranged face-to-face to be congruent to the planar array of LCD devices.
29. A display panel according to claim 28 in combination with a frame that is configured to surround the front and back faces of the display panel.
30. A display panel according to claim 29 in further combination with an electronics module that is supported by the frame and that is configured to control the array of LCD devices and the at least one LED device.
31. A display panel according to claim 28 wherein the planar array of LCD devices is at least 17 inches in size along a diagonal thereof.
32. A display panel according to claim 28 wherein the at least one LED device is configured to emit light that appears as white light.
33. A display panel according to claim 32 wherein the at least one LED device that is mounted in a respective reflector cavity and that is configured to emit light that appears as white light consists of:
a red LED device;
a blue LED device; and
two green LED devices.
34. A display panel according to claim 33 wherein the two green LED devices emit green light at different frequencies.
35. A display panel according to claim 28 further comprising:
a planar optical film that is located between the planar array of LCD devices and the at least one LED device such that, in operation, the at least one LED device transmits light through the planar optical film and to the planar array of LCD devices.
36. A display panel according to claim 28 in combination with other electrical and/or mechanical elements to provide a computer monitor and/or a television.
37. A flat panel comprising:
a plurality of solid metal block tiles, a respective one of which includes first and second opposing faces and four ends therebetween, the plurality of solid metal block tiles being connected end-to-end in the flat panel, the plurality of solid metal block tiles including mating surfaces therebetween; and
a plurality of light emitting diodes (LEDs), a respective one of which is mounted on the first face of a respective solid metal block tile in the flat panel.
38. A flat panel according to claim 37 wherein the plurality of solid metal block tiles are connected end-to-end in the flat panel in a two-dimensional array of solid metal block tiles.
39. A flat panel according to claim 37 in combination with a flat panel frame that is configured to surround the plurality of solid metal block tiles.
40. A flat panel according to claim 39 in further combination with a flat panel electronics module that is supported by the flat panel frame and that is configured to control the at least one of the LEDs.
41. A flat panel according to claim 37 wherein the plurality of solid metal block tiles that are connected end-to-end in the flat panel is at least 17 inches in size along a diagonal thereof.
42. A flat panel according to claim 37 wherein at least one of the LEDs is configured to emit light that appears as white light.
43. A flat panel according to claim 37 wherein a respective first face of a respective solid metal block tile includes a respective reflective cavity therein, and wherein the respective one of the LEDs is mounted in the respective reflective cavity.
44. A flat panel according to claim 37 in further combination with other electrical and/or mechanical elements of the flat panel.
45. A flat panel according to claim 37 wherein the second face includes therein a plurality of metal heat sink fins.
46. A flat panel comprising:
a plurality of solid metal block bars, a respective one of which includes first and second opposing faces and four ends therebetween, the plurality of solid metal block bars being connected end-to-end in the flat panel, the plurality of solid metal block bars including mating surfaces therebetween; and
a plurality of light emitting diodes (LEDs), a respective one of which is mounted on the first face of a respective solid metal block bar in the flat panel.
47. A flat panel according to claim 46 wherein the plurality of solid metal block bars are connected end-to-end in the flat panel in a one-dimensional array of bars.
48. A flat panel according to claim 46 in combination with a flat panel frame that is configured to surround the plurality of solid metal block bars.
49. A flat panel according to claim 48 in further combination with a flat panel electronics module that is supported by the flat panel frame and that is configured to control the at least one of the LEDs.
50. A flat panel according to claim 46 wherein the plurality of solid metal block bars that are connected end-to-end in the flat panel is at least 17 inches in size along a diagonal thereof.
51. A flat panel according to claim 46 wherein at least one of the LEDs is configured to emit light that appears as white light.
52. A flat panel according to claim 46 wherein a respective first face of a respective solid metal block bar includes a respective reflective cavity therein, and wherein the respective one of the LEDs is mounted in the respective reflective cavity.
53. A flat panel according to claim 46 in further combination with other electrical and/or mechanical elements of the flat panel.
54. A flat panel according to claim 46 wherein the second face includes therein a plurality of metal heat sink fins.
Descripción
CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority under 35 U.S.C. Section 120 as a continuation reissue application of U.S. application Ser. No. 12/696,050, filed Jan. 28, 2010, now U.S. Reissue Pat. No. Re. 42,598, which is a reissue of U.S. application Ser. No. 11/022,332, filed Dec. 23, 2004, now U.S. Pat. No. 7,322,732. Each of these applications is assigned to the assignee of the present application, and the disclosures of each of the above referenced applications are hereby incorporated herein by reference in their entirety as if set forth fully herein.

MULTIPLE REISSUE APPLICATIONS

More than one reissue application has been filed for the reissue of U.S. Pat. No. 7,322,732. The reissue applications are U.S. application Ser. No. 12/696,050, now U.S. Reissue Pat. No. Re. 42,598, and the present U.S. application Ser. No. 13/169,359, filed Jun. 24, 2011. The present U.S. application Ser. No. 13/169,359, filed on Jun. 27, 2011 is a continuation reissue application of U.S. application Ser. No. 12/696,050, filed on Jan. 28, 2010, which is a reissue of U.S. Pat. No. 7,322,732.

FIELD OF THE INVENTION

This invention relates to Liquid Crystal Display (LCD) devices, and more particularly, to backlighting of LCD devices.

BACKGROUND OF THE INVENTION

LCD devices are widely used in flat panel displays for monitors, televisions and/or other displays. As is well known to those having skill in the art, an LCD display generally includes a planar array of LCD devices that act as an array of optical shutters. Transmissive LCD displays employ backlighting using fluorescent tubes above, beside and sometimes behind the array of LCD devices. A diffusion panel behind the LCD devices can be used to redirect and scatter the light evenly to provide a more uniform display.

For example, it is known to use one or more fluorescent cold cathode tubes adjacent one or more edges of the planar array of LCD devices, and a light guide or light pipe that directs the light from the fluorescent cold cathode tubes, to illuminate the face of the planar array of LCD devices. Unfortunately, such edge lighting may be inefficient, with up to 50% or more of the light being lost.

It is also known to provide an array of fluorescent cold cathode tubes behind and facing the planar array of LCD devices. Unfortunately, an array of fluorescent cold cathode tubes may increase the thickness of the LCD display and/or increase the power consumption thereof. It also may be difficult to uniformly illuminate the planar array of LCD devices with the array of fluorescent cold cathode tubes.

Semiconductor light emitting devices, such as Light Emitting Diode (LED) devices, also may be used for edge illumination of a planar array of LCD devices. For example, U.S. patent application Ser. No. 10/898,608, filed Jul. 23, 2004, entitled Reflective Optical Elements for Semiconductor Light Emitting Devices, to coinventor Negley, and assigned to the assignee of the present invention, the disclosure of which is hereby incorporated herein by reference in its entirety as if set forth fully herein, describes side emission LEDs that may be used for large area LCD and/or television backlighting.

SUMMARY OF THE INVENTION

Some embodiments of the present invention provide a display panel for a flat panel display that includes a planar (i.e., a two dimensional) array of LCD devices and a planar array of LED devices that is closely spaced apart from the planar array of LCD devices, at least some of the LED devices being disposed within a periphery of the array of LCD devices such that, in operation, the planar array of LED devices provides backlighting for the planar array of LCD devices. In some embodiments, the planar arrays of LCD and LED devices are at least 17 inches in size along a diagonal thereof. In other embodiments, the planar array of LED devices is configured to emit light that appears as white light. In still other embodiments of the present invention, the LED devices in the planar array of LED devices are spaced sufficiently close to one another so as to provide uniform backlighting of the planar array of LCD devices.

In some embodiments, the planar array of LED devices is configured to transmit light from the planar array of LED devices through the planar array of LCD devices, along a light path that extends generally perpendicular to the planar arrays of LCD and LED devices. In other embodiments, the light path does not redirect the light to be parallel to the planar arrays of LCD and LED devices. In still other embodiments, a reflector-free light path is provided between the planar array of LED devices and the planar array of LCD devices. In yet other embodiments, the planar array of LED devices is configured to emit light generally parallel to the planar array of LCD devices. In these embodiments, an array of reflectors may be configured to redirect the light that is emitted generally parallel to the planar array of LCD devices along a light path that extends generally perpendicular to the planar arrays of LCD and LED devices.

In other embodiments, a planar optical film is located between the planar array of LCD devices and the planar array of LED devices, such that, in operation, the planar array of LED devices transmits light through the planar optical film and to the planar array of LCD devices. The planar optical film may include polarizers, scatterers and/or other optical elements.

In some embodiments of the invention, the planar array of LED devices includes at least one solid metal block having first and second opposing metal faces that extend parallel to the array of LCD devices. The first metal face is facing toward the array of LCD devices, and the second metal face is facing away from the array of LCD devices. The first metal face includes therein an array of reflector cavities, and the second metal face includes therein a plurality of heat sink fins. At least one LED device is mounted in a respective reflector cavity such that, in operation, the reflector cavity reflects light that is emitted by the at least one LED device that is mounted therein away from the reflector cavity. In some embodiments, the at least one LED device that is mounted in the respective reflector cavity is configured to emit light that appears as white light in operation. In other embodiments, the at least one LED device that is mounted in the respective reflector cavity consists of a red LED device, a blue LED device and two green LED devices. In some embodiments, the two green LED devices emit green light at different frequencies.

It will be understood that embodiments of the invention have been described above in connection with display panels for flat panel displays. However, other embodiments of the invention can provide an LED-based backlighting system for an LCD display, according to any of the embodiments that were described above. Moreover, still other embodiments of the invention can add other components such as a frame and/or electronics to provide a flat panel display. Analogous backlighting methods also may be provided.

Other embodiments of the present invention provide a flat panel display that includes a front face comprising a planar (i.e., two dimensional) array of LCD devices, and a back face comprising at least one solid metal block. The solid metal block includes first and second opposing metal faces that extend parallel to the array of LCD devices. The first metal face is facing toward the array of LCD devices, and the second metal face is facing away from the array of LCD devices. The first metal face includes therein an array of reflector cavities and the second metal face includes therein a plurality of heat sink fins that are exposed at the back face of the flat panel display. At least one LED device is mounted in a respective reflector cavity such that, in operation, the reflector cavity reflects light that is emitted by the at least one LED device that is mounted therein away from the reflector cavity.

In some embodiments, the solid metal block is a single solid metal block that is congruent to the planar array of LCD devices. In other embodiments, the at least one solid metal block includes a plurality of solid metal block tiles that are arranged in an array that is congruent to the planar array of LCD devices. In still other embodiments, the at least one solid metal block includes a plurality of solid metal block bars that are arranged face-to-face to be congruent to the planar array of LCD devices.

In still other embodiments, a frame is provided that is configured to surround the front and back faces of the flat panel displays. The planar array of LCD devices may be at least 17 inches diagonal, the LED devices may be configured to emit light that appears as white light, the at least one LED device can include a red LED, a blue LED and two green LEDs, and/or an electronics module may be provided that is supported by the frame and is configured to control the LCD and LED devices, according to any of the embodiments that were described above.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of display panels for flat panel displays according to various embodiments of the present invention.

FIG. 2 is a perspective view of display panels for flat panel displays of FIG. 1.

FIG. 3 is an enlarged view of a portion of a display panel for a flat panel display of FIG. 1.

FIG. 4 is a cross-sectional view of display panels for flat panel displays according to other embodiments of the present invention.

FIG. 5 is a cross-sectional view of flat panel displays according to still other embodiments of the present invention.

FIGS. 6 and 7 are plan views of flat panel displays of FIG. 5 according to still other embodiments of the present invention.

FIG. 8 is a plan view of a portion of a first face of a solid metal block of an array of LED devices according to various embodiments of the present invention.

FIG. 9 is a cross-sectional view of display panels for flat panel displays according to various other embodiments of the present invention.

DETAILED DESCRIPTION

The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. However, this invention should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the thickness of layers and regions are exaggerated for clarity. Like numbers refer to like elements throughout. As used herein the term “and/or” includes any and all combinations of one or more of the associated listed items and may be abbreviated as “/”.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, regions, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, steps, operations, elements, components, and/or groups thereof.

It will be understood that when an element such as a layer or region is referred to as being “on” or extending “onto” another element, it can be directly on or extend directly onto the other element or intervening elements may also be present. In contrast, when an element is referred to as being “directly on” or extending “directly onto” another element, there are no intervening elements present. It will also be understood that when an element is referred to as being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention.

Furthermore, relative terms, such as “lower”, “base”, or “horizontal”, and “upper”, “top”, or “vertical” may be used herein to describe one element's relationship to another element as illustrated in the Figures. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. For example, if the device in the Figures is turned over, elements described as being on the “lower” side of other elements would then be oriented on “upper” sides of the other elements. The exemplary term “lower”, can therefore, encompasses both an orientation of “lower” and “upper,” depending on the particular orientation of the figure. Similarly, if the device in one of the figures is turned over, elements described as “below” or “beneath” other elements would then be oriented “above” the other elements. The exemplary terms “below” or “beneath” can, therefore, encompass both an orientation of above and below. Moreover, the terms “front” and “back” are used herein to describe opposing outward faces of a flat panel display. Conventionally, the viewing face is deemed the front, but the viewing face may also be deemed the back, depending on orientation.

Embodiments of the present invention are described herein with reference to cross section illustrations that are schematic illustrations of idealized embodiments of the present invention. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, embodiments of the present invention should not be construed as limited to the particular shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, a region illustrated or described as flat may, typically, have rough and/or nonlinear features. Moreover, sharp angles that are illustrated, typically, may be rounded. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

FIG. 1 is a cross-sectional view of display panels for flat panel displays according to various embodiments of the present invention. As shown in FIG. 1, these display panels 100 according to various embodiments of the present invention, include a planar (i.e., two dimensional) array 110 of LCD devices, and a planar array 120 of LED devices 130 that is closely spaced apart from the planar array 110 of LCD devices, at least some of the LED devices 130 being disposed within a periphery 110a of the array 110 of LCD devices such that, in operation, the planar array 120 of LED devices 130 provides backlighting for the planar array 110 of LCD devices.

FIG. 2 is a perspective view of flat panel displays of FIG. 1 according to various embodiments of the present invention. As shown in FIG. 2, the LED devices 130 in the planar array 120 may be spaced apart from one another so as to provide substantially uniform backlighting of the planar array of LCD devices 110. The LED devices 130 may be packed in a random array, a grid array, and/or using hexagonal packing, as shown in FIG. 2. Uniform and/or non-uniform packing may be provided.

Embodiments of the present invention may provide uniform backlighting for large area display panels. The display panels may be combined with other electrical and/or mechanical elements to provide computer monitors, televisions and/or other flat panel displays. As used herein, “uniform” backlighting means that an ordinary viewer, who views the display at a conventional viewing distance, is not aware of any variation in backlighting intensity. In some embodiments, variations of less than about 25% may provide uniform intensity, whereas, in other embodiments, variations of less than 5% may provide uniform intensity. In some embodiments, these displays are rectangular and, in some embodiments, may be square. As used herein, a large area display has a diagonal size D of at least 17″. However, other embodiments of the invention may be used with displays that are smaller than 17″ diagonal. Moreover, the pitch P between adjacent LED devices 130 in the array also may be arranged to allow a uniform backlighting of the planar array of LCD devices, according to some embodiments of the invention, as will be described in detail below.

Embodiments of the present invention that are described in FIGS. 1 and 2 can provide direct backlighting of flat panel liquid crystal displays. In particular, as shown in FIG. 1, the planar array 120 of LED devices 130 is configured to transmit light from the planar array 120 of LED devices 130 to the planar array 110 of LCD devices along a light path 140 that extend generally perpendicular to the planar arrays 110, 120 of LCD and LED devices. In some embodiments, the light path 140 does not redirect the light to be parallel to the planar arrays 110, 120 of LCD and LED devices. In other embodiments, the light path between the planar array 120 of LED devices 130 and the planar array 110 of LCD devices is reflector-free. In yet other embodiments, at least some of the LED devices 130 are disposed within a periphery of the array 110 of LCD devices.

By providing direct backlighting, the thickness of the display panel 100 may be reduced and/or the optical efficiency may be enhanced compared to edge backlighting. Moreover, in some embodiments, the need for diffusing and/or light guide elements between the planar array 110 of LCD devices and the planar array 120 of LED devices 130 also may be reduced or eliminated.

As was described above, in some embodiments of the present invention, the LED devices 130 in the planar array 120 of LED devices 130 are spaced sufficiently close to one another, so as to provide uniform backlighting of the planar array 110 of LCD devices. In particular, the light path 140 of FIG. 1 is illustrated by showing the half angle of illumination, i.e., the angle of illumination wherein the light output falls by one half the light output on the optical axis. By placing the LEDs sufficiently close so that the half angles of illumination just overlap, as shown in FIG. 1, uniform illumination of the array 110 of LCD devices may be provided, according to some embodiments of the present invention.

FIG. 3 is an exploded view of a portion of the display panel for the flat panel display of FIG. 1, illustrating geometries that can provide uniform direct illumination according to various embodiments of the present invention. As shown in FIG. 3, the half angle of illumination is denoted by θ, the spacing between the planar array 110 of LCD devices and the planar array 120 of LED devices 130 is denoted by x, and the pitch between adjacent LED devices 130 is 2y. It will be understood by those having skill in the art that smaller pitches than 2y may be used, but may not be needed to provide uniform illumination. Moreover, larger pitches may provide non-uniform illumination or may provide uniform illumination using diffusers and/or other optical elements in the light path.

As was described above, some embodiments of the present invention can eliminate the need for at least some optical films that are conventionally used in some flat panel displays. Conventionally, these optical films may include polarizers, light scattering films, light guide films, etc. In other embodiments of the invention, some of these optical films may be eliminated, but other optical films may still be used. For example, a polarizing film still may be used. Accordingly, as shown in FIG. 4, an optical film 410 may be placed between the array 110 of LCD devices and the array 120 of LED devices 130.

FIG. 5 is a cross-sectional view of flat panel displays 600 according to other embodiments of the present invention. In these embodiments, the planar array 120 of LED devices 130 includes at least one solid metal block 500 including first and second opposing metal faces 500a, 500b, respectively, that extend parallel to the array 110 of LCD devices. The first metal face 500a faces toward the array 110 of LCD devices, and the second metal face 500b faces away from the array 110 of LCD devices. The first metal face 500a includes therein an array of reflector cavities 510, and the second metal face 500b includes therein a plurality of heat sink fins 530. At least one LED device 130 is mounted in a respective reflector cavity 510 such that, in operation, the reflector cavity 510 reflects light that is emitted by the at least one LED device 130 that is mounted therein from the reflector cavity 510 along the optical path 140, as shown in FIG. 5.

In some embodiments, the reflector cavity 510 includes at least one sidewall 502 that is configured to reflect light that is emitted from the LED 130 in the cavity 510 along the optical path 140. Moreover, in some embodiments, a flexible film 1420 also may be provided that extends across one or more of the cavities 510. The flexible film 560 may include therein optical elements such as lenses, phosphor and/or other optical elements therein.

Many different embodiments of planar arrays 120 of LED devices 130 may be provided according to various embodiments of the present invention, as are described, for example, in U.S. Publication No. 2006/0097385, published May 11, 2006, entitled Solid Metal Block Semiconductor Light Emitting Device Mounting Substrates and Packages Including Cavities and Heat Sinks, and Methods of Packaging Same, to coinventor Negley, and U.S. Publication No. 2006/0124953, published Jun. 15, 2006, entitled Semiconductor Light Emitting Device Mounting Substrates and Packages Including Cavities and Cover Plates, and Methods Of Packaging Same, to coinventor Negley, both of which are assigned to the assignee of the present invention, the disclosures of both which are hereby incorporated herein by reference in their entirety as if set forth fully herein.

In particular, as described in the abstract of U.S. Publication No. 2006/0097385, published May 11, 2006, a mounting substrate for a semiconductor light emitting device includes a solid metal block having first and second opposing metal faces. The first metal face includes a cavity that is configured to mount at least one semiconductor light emitting device therein, and to reflect light that is emitted by at least one semiconductor light emitting device that is mounted therein away from the cavity. The second metal face includes heat sink fins therein. One or more semiconductor light emitting devices are mounted in the cavity. Reflective coatings, conductive traces, insulating layers, pedestals, through holes, lenses, flexible films, optical elements, phosphor, integrated circuits and/or optical coupling media also may be provided in the package. Related packaging methods also may be provided.

Moreover, as described in the abstract of U.S. Publication No. 2006/0124953, published Jun. 15, 2006, a mounting substrate for a semiconductor light emitting device includes a solid metal block having first and second opposing metal faces. The first metal face includes a cavity that is configured to mount at least one semiconductor light emitting device therein, and to reflect light that is emitted by at least one semiconductor light emitting device that is mounted therein away from the cavity. One or more semiconductor light emitting devices are mounted in the cavity. A cap having an aperture is configured to matingly attach to the solid metal block adjacent the first metal face such that the aperture is aligned to the cavity. Reflective coatings, conductive traces, insulating layers, pedestals, through holes, lenses, flexible films, optical elements, phosphor, integrated circuits, optical coupling media, recesses and/or meniscus control regions also may be provided in the package. Related packaging methods also may be provided.

Still referring to FIG. 5, the planar array 120 of LED devices 130 may be configured to act as the back face of a flat panel display 600 according to various embodiments of the present invention. More particularly, the display 600 of FIG. 5 includes a front face 570a that comprises the planar array 110 of LCD devices. A back face 570b comprises the at least one solid metal block 500 including the first and second opposing metal faces 500a, 500b, respectively, that extend parallel to the array 110 of LCD devices. The first metal face 500a is facing toward the array 110 of LCD devices, and the second metal face 120b is facing away from the array 110 of LCD devices. The first metal face 500a includes therein an array of reflective cavities 510, and the second metal face 500b includes therein a plurality of heat sink fins 530 that are exposed at the back face 570b of the flat panel display 600. At least one LED device 130 is mounted in a respective reflector cavity 510 such that, in operation, the reflector cavity 510 reflects light that is emitted by the at least one LED device 130 that is mounted therein away from the reflector cavity 510. Accordingly, the at least one solid metal block 500 forms an exposed back face of the flat panel display 100. An electronics module 550 also may be included that is electrically connected to the LED devices 130 and the LCD devices 110. A frame 540 and/or other mechanical elements may be used to maintain the array of LCD devices 110 and the array 120 of LED devices 130 in closely spaced apart relation facing one another. The electronics module 550 also may be supported by the frame 540.

Various configurations of solid metal blocks 500 may be used according to various embodiments of the present invention. For example, as shown in FIG. 5, the solid metal block 500 may be a single solid metal block that is congruent to the planar array of LCD devices 110. In other embodiments, as shown in FIG. 6, a plurality of solid metal block bars 600 are arranged face-to-face, to be congruent to the planar array 110 of LCD devices. In still other embodiments, as shown in FIG. 7, a plurality of solid metal block tiles 700 are arranged in an array that is congruent to the planar array 110 of LCD devices. The solid metal block bars 600 and/or tiles 700 may be maintained in place by the frame 540 and/or by various interconnection schemes, including mating surfaces and/or fasteners on the bars and/or tiles that can provide mechanical and/or electrical interconnection of the LED devices 130 on the various bars 600 and/or tiles 700.

FIG. 8 is a plan view of a portion of the first face 500a of a solid metal block 500 according to various embodiments of the present invention, illustrating how multiple LEDs may be placed in a single cavity according to various embodiments of the present invention. In particular, as shown in FIG. 8, a semiconductor white light pixel 800 includes a red LED device 810R, a blue LED device 810B, a first green LED device 810G1 and a second green LED device 810G2. The first and second green LED devices 810G1 and 810G2, respectively, emit light at different green frequencies. For example, in some embodiments, the first green LED device 810G1 can emit at 534 nm and the second green LED device 810G2 can emit at 528 nm. The red LED device 810R can emit at 625 nm and the blue LED device 810B can emit at 460 nm. The red, blue, first green and second green LED devices 810R, 810B, 810G1, 810G2, respectively, are configured to emit light that appears as a pixel of white light in operation.

In other embodiments, a single red, green and blue LED device may be configured to emit light that appears as a pixel of white light in operation. For example, in some embodiments, the die size of the red, green and/or blue LED devices may be selected to meet a desired brightness and/or intensity balancing. In one embodiment, standard LEDs marketed by the assignee of the present invention may be used wherein, for example, a C460XT290-Sxx00-A blue LED (290 μm×290 μm), a green C527XB500-S0100-A LED and a conventional red LED may be used. The larger green LED die can provide sufficient optical brightness and may reduce assembly costs compared to a pixel that includes, red, blue, first green and second green LED devices. Other configurations may be used to provide a desired lumen requirements using properly sized die.

FIG. 9 is a cross-sectional view of display panels for flat panel displays according to other embodiments of the present invention. As shown in FIG. 9, these display panels 900 according to other embodiments of the present invention include at least one solid metal block 500 including first and second opposing faces 500a, 500b, respectively, that extend generally parallel to the array 110 of LCD devices. The first metal face 500a includes therein an array of reflector cavities 510 and the second metal face 500b includes therein a plurality of heat sink fins 530. At least one LED device 130 is mounted in a respective reflector cavity 510 such that, in operation, the reflector cavity 510 reflects light that is emitted by the at least one LED device 130 that is mounted therein from the reflector cavity along an optical path 140, as shown in FIG. 9.

In embodiments of FIG. 9, the planar array of LED devices 130 is configured to emit light generally parallel to the planar array of LCD devices 110. Moreover, an array of reflectors 910 also is provided. The reflectors 910 are generally oblique with respect to the first space 500a, and are configured to redirect the light that is emitted generally parallel to the planar array of LCD devices 110 along the light path 140 that extends generally perpendicular to the planar arrays of LCD and LED devices. Accordingly, some geometries according to embodiments of the present invention can provide optical cavities that are generally perpendicular or oblique to the first face 500a and can use a secondary optical reflector 910 to move the photons from generally parallel to the first face 500a to generally orthogonal to the first face 500a. In some embodiments, a flexible film including optical elements may extend parallel to the arrays of LCD and LED devices, similar to the flexible film 560 of FIG. 5. In other embodiments, separate flexible films may be provided across the cavities 510, extending generally orthogonal to the arrays of LCD and LED devices.

It also will be understood by those having skill in the art that various combinations and subcombinations of embodiments of FIGS. 1-9 may be provided according to other embodiments of the present invention. Thus, for example, embodiments of FIG. 9 may be combined with embodiments of FIGS. 5, 6, 7 and/or 8.

In the drawings and specification, there have been disclosed embodiments of the invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being set forth in the following claims.

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US404255214 Nov 197516 Ago 1977Warner-Lambert CompanyComposition for hydrophilic lens blank and method of casting
US410723822 Ene 197615 Ago 1978Exxon Research & Engineering Co.Graft copolymerization process
US414194121 Sep 197727 Feb 1979American Optical CorporationContact lens casting method
US456201828 Ene 198531 Dic 1985Neefe Charles WMethod of casting optical surfaces on lens blanks
US465092211 Mar 198517 Mar 1987Texas Instruments IncorporatedThermally matched mounting substrate
US47940484 May 198727 Dic 1988Allied-Signal Inc.Ceramic coated metal substrates for electronic applications
US482642418 Sep 19862 May 1989Canon Kabushiki KaishaLens barrel made by injection molding
US491849714 Dic 198817 Abr 1990Cree Research, Inc.Blue light emitting diode formed in silicon carbide
US49356657 Nov 198819 Jun 1990Mitsubishi Cable Industries Ltd.Light emitting diode lamp
US496686228 Ago 198930 Oct 1990Cree Research, Inc.Method of production of light emitting diodes
US502496616 Abr 199018 Jun 1991At&T Bell LaboratoriesMethod of forming a silicon-based semiconductor optical device mount
US502716828 Ago 198925 Jun 1991Cree Research, Inc.Blue light emitting diode formed in silicon carbide
US50879495 Mar 199111 Feb 1992Hewlett-Packard CompanyLight-emitting diode with diagonal faces
US511027830 Nov 19905 May 1992Pilkington Visioncare, Inc.Injection molding apparatus for producing a toric lens casting mold arbor
US51436603 Dic 19901 Sep 1992National Research Development CorporationMethod of casting a contact lens
US516681528 Feb 199124 Nov 1992Novatel Communications, Ltd.Liquid crystal display and reflective diffuser therefor including a reflection cavity section and an illumination cavity section
US52100515 Jun 199111 May 1993Cree Research, Inc.High efficiency light emitting diodes from bipolar gallium nitride
US527784024 Abr 199211 Ene 1994Mitsubishi Rayon Co., Ltd.Phosphor paste compositions and phosphor coatings obtained therefrom
US529876830 Dic 199229 Mar 1994Sharp Kabushiki KaishaLeadless chip-type light emitting element
US533894422 Sep 199316 Ago 1994Cree Research, Inc.Blue light-emitting diode with degenerate junction structure
US53746681 May 198920 Dic 1994Mitsui Toatsu Chemicals, Inc.Casting epoxy resin, polythiol and releasing agent to form lens
US539399313 Dic 199328 Feb 1995Cree Research, Inc.Buffer structure between silicon carbide and gallium nitride and resulting semiconductor devices
US541634223 Jun 199316 May 1995Cree Research, Inc.Blue light-emitting diode with high external quantum efficiency
US552358920 Sep 19944 Jun 1996Cree Research, Inc.Vertical geometry light emitting diode with group III nitride active layer and extended lifetime
US560413512 Ago 199418 Feb 1997Cree Research, Inc.Method of forming green light emitting diode in silicon carbide
US56311907 Oct 199420 May 1997Cree Research, Inc.Method for producing high efficiency light-emitting diodes and resulting diode structures
US5660461 *8 Dic 199426 Ago 1997Quantum Devices, Inc.Arrays of optoelectronic devices and method of making same
US566948616 May 199623 Sep 1997Fuji Polymeritech Co., Ltd.Illuminated switch
US57395548 May 199514 Abr 1998Cree Research, Inc.Double heterojunction light emitting diode with gallium nitride active layer
US575373015 May 199119 May 1998Mitsui Toatsu Chemicals, Inc.Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur-containing urethane resin lens and lens prepared thereby
US581375327 May 199729 Sep 1998Philips Electronics North America CorporationUV/blue led-phosphor device with efficient conversion of UV/blues light to visible light
US585106328 Oct 199622 Dic 1998General Electric CompanyLight-emitting diode white light source
US585776725 Feb 199712 Ene 1999Relume CorporationThermal management system for L.E.D. arrays
US585827820 Feb 199712 Ene 1999Futaba Denshi Kogyo K.K.Phosphor and method for producing same
US58825539 Jun 199716 Mar 1999Guide CorporationMulti-color lens assembly injection molding process and apparatus
US591247720 May 199715 Jun 1999Cree Research, Inc.High efficiency light emitting diodes
US59593161 Sep 199828 Sep 1999Hewlett-Packard CompanyMultiple encapsulation of phosphor-LED devices
US59684229 Jun 199819 Oct 1999Bausch & Lomb IncorporatedInjection molding process for rotationally asymmetric contact lens surfaces
US606072919 Nov 19989 May 2000Rohm Co., Ltd.Light-emitting device
US606686120 May 199823 May 2000Siemens AktiengesellschaftWavelength-converting casting composition and its use
US606944028 Abr 199930 May 2000Nichia Kagaku Kogyo Kabushiki KaishaLight emitting device having a nitride compound semiconductor and a phosphor containing a garnet fluorescent material
US612060013 Abr 199819 Sep 2000Cree, Inc.Double heterojunction light emitting diode with gallium nitride active layer
US615624218 Mar 19985 Dic 2000Hoya CorporationMethod of injection molding plastic lens
US617768824 Nov 199823 Ene 2001North Carolina State UniversityPendeoepitaxial gallium nitride semiconductor layers on silcon carbide substrates
US618454429 Dic 19986 Feb 2001Rohm Co., Ltd.Semiconductor light emitting device with light reflective current diffusion layer
US618760620 Sep 199913 Feb 2001Cree, Inc.Group III nitride photonic devices on silicon carbide substrates with conductive buffer interlayer structure
US62012627 Oct 199713 Mar 2001Cree, Inc.Group III nitride photonic devices on silicon carbide substrates with conductive buffer interlay structure
US621922324 Sep 199817 Abr 2001Nec CorporationSolid electrolyte capacitor and method of producing the same
US625225430 Nov 199826 Jun 2001General Electric CompanyLight emitting device with phosphor composition
US63296761 Mar 199911 Dic 2001Toru TakayamaFlat panel solid state light source
US6331111 *24 Sep 199918 Dic 2001Cao Group, Inc.Curing light system useful for curing light activated composite materials
US63469734 Nov 199712 Feb 2002Casio Computer Co., Ltd.Electroluminescent panel-attached electronic device
US637318822 Dic 199816 Abr 2002Honeywell International Inc.Efficient solid-state light emitting device with excited phosphors for producing a visible light output
US638341723 Sep 19997 May 2002Paulson Manufacturing CorporationMethod for injection molding a curvilinear lens
US639123122 Nov 199921 May 2002Younger Mfg. Co.Method for side-fill lens casting
US640412520 Oct 199911 Jun 2002Sarnoff CorporationMethod and apparatus for performing wavelength-conversion using phosphors with light emitting diodes
US648038919 Mar 200212 Nov 2002Opto Tech CorporationHeat dissipation structure for solid-state light emitting device package
US64983559 Oct 200124 Dic 2002Lumileds Lighting, U.S., LlcHigh flux LED array
US65172181 Dic 200011 Feb 2003Relume CorporationLED integrated heat sink
US652191514 Mar 200118 Feb 2003Asahi Rubber Inc.Light-emitting diode device
US653132811 Oct 200111 Mar 2003Solidlite CorporationPackaging of light-emitting diode
US65626431 Oct 200113 May 2003Solidlite CorporationPackaging types of light-emitting diode
US65769307 Dic 200010 Jun 2003Osram Opto Semiconductors GmbhLight-radiating semiconductor component with a luminescence conversion element
US659976820 Ago 200229 Jul 2003United Epitaxy Co., Ltd.Surface mounting method for high power light emitting diode
US663935628 Mar 200228 Oct 2003Unity Opto Technology Co., Ltd.Heat dissipating light emitting diode
US6652123 *7 May 200125 Nov 2003Jiahn-Chang WuLight emitting diode display having heat sinking circuit rails
US66866091 Oct 20023 Feb 2004Ultrastar LimitedPackage structure of surface mounting led and method of manufacturing the same
US670706918 Jun 200216 Mar 2004Samsung Electro-Mechanics Co., LtdLight emission diode package
US673446519 Nov 200211 May 2004Nanocrystals Technology LpNanocrystalline based phosphors and photonic structures for solid state lighting
US674407727 Sep 20021 Jun 2004Lumileds Lighting U.S., LlcSelective filtering of wavelength-converted semiconductor light emitting devices
US678336213 Dic 200131 Ago 2004Cao Group, Inc.Dental curing light using primary and secondary heat sink combination
US6789921 *25 Mar 200314 Sep 2004Rockwell CollinsMethod and apparatus for backlighting a dual mode liquid crystal display
US67911516 Ene 200314 Sep 2004Highlink Technology CorporationBase of optoelectronic device
US68242943 Jul 200230 Nov 2004Cao Group, Inc.Light for use in activating light-activated materials, the light having a plurality of chips mounted in a gross well of a heat sink, and a dome covering the chips
US685313112 Nov 20028 Feb 2005General Electric CompanySingle phosphor for creating white light with high luminosity and high CRI in a UV LED device
US6948840 *25 Oct 200227 Sep 2005Everbrite, LlcLight emitting diode light bar
US7001059 *7 Oct 200321 Feb 2006Samsung Electronics Co., Ltd.Two-way backlight assembly and two-way liquid crystal display apparatus having the same
US704252730 Ago 20019 May 2006Nec CorporationField sequential display of color video picture with color breakup prevention
US713476726 Jul 200414 Nov 2006Chunghwa Picture TubesStructure for improving backlight uniformity
US7355562 *17 Feb 20048 Abr 2008Thomas SchubertElectronic interlocking graphics panel formed of modular interconnecting parts
US20020006044 *30 Abr 200117 Ene 2002Koninklijke Philips Electronics N.V.Assembly of a display device and an illumination system
US2002012316425 Ene 20025 Sep 2002Slater David B.Light emitting diodes including modifications for light extraction and manufacturing methods therefor
US2002017235415 Mar 200221 Nov 2002Kengo NishiHighly recyclable keypad with a key top and method of separating the same
US200300064187 May 20029 Ene 2003Emerson David ToddGroup III nitride based light emitting diode structures with a quantum well and superlattice, group III nitride based quantum well structures and group III nitride based superlattice structures
US200300322127 Ago 200113 Feb 2003Bily WangLED focusing cup in a stacked substrate
US200300672649 Oct 200210 Abr 2003Agilent Technologies, Inc.Light-emitting diode and method for its production
US2003008034124 Ene 20021 May 2003Kensho SakanoLight emitting diode, optical semiconductor element and epoxy resin composition suitable for optical semiconductor element and production methods therefor
US2003009845925 Nov 200229 May 2003Citizen Electronics Co., Ltd.Light emitting diode device
US2003012831314 Dic 200110 Jul 2003Eastman Kodak CompanyLight diffusion material with color temperature correction
US2003015386111 Feb 200214 Ago 2003Royer George R.Wound treatment bandage
US2003017357512 Feb 200118 Sep 2003Dominik EisertRadiation emitting semiconductor device
US2003018982926 Feb 20039 Oct 2003Matsushita Electric Industrial Co., Ltd.LED illumination apparatus and card-type LED illumination source
US2004004122227 May 20034 Mar 2004Loh Ban P.Power surface mount light emitting die package
US200400417574 Sep 20024 Mar 2004Ming-Hsiang YangLight emitting diode display module with high heat-dispersion and the substrate thereof
US200400562609 Sep 200325 Mar 2004Slater David B.Phosphor-coated light emitting diodes including tapered sidewalls, and fabrication methods therefor
US2004006589428 Ago 20028 Abr 2004Takuma HashimotoLight emitting device using led
US200400665567 Oct 20028 Abr 2004Eastman Kodak CompanyVoided polymer film containing layered particulates
US2004007995722 Oct 200329 Abr 2004Andrews Peter ScottPower surface mount light emitting die package
US2004009573815 Nov 200220 May 2004Der-Ming JuangBase plate for a light emitting diode chip
US2004012015516 Abr 200224 Jun 2004Ryoma SuenagaLight-emitting apparatus
US2004021197027 May 200328 Oct 2004Yoshiaki HayashimotoSemiconductor light emitting device with reflectors having cooling function
US2004022243311 Ago 200311 Nov 2004Lamina CeramicsLight emitting diodes packaged for high temperature operation
US2004025342724 Oct 200216 Dic 2004Hiroshi YokogawaComposite thin film holding substrate, transparent conductive film holding substrate, and panel light emitting body
US2004026421214 Jun 200430 Dic 2004Lg.Philips Lcd Co., Ltd.Liquid crystal display module and driving apparatus thereof
US20050007780 *23 Jun 200413 Ene 2005Stephen FeuerbornModular lighting with blocks
US200500517829 Sep 200310 Mar 2005Negley Gerald H.Transmissive optical elements including transparent plastic shell having a phosphor dispersed therein, and methods of fabricating same
US200500517899 Sep 200310 Mar 2005Negley Gerald H.Solid metal block mounting substrates for semiconductor light emitting devices, and oxidizing methods for fabricating same
US20060013014 *30 Jun 200519 Ene 2006Robert HaymanDental light devices having an improved heat sink
US2006001812223 Jul 200426 Ene 2006Negley Gerald HReflective optical elements for semiconductor light emitting devices
US20060023448 *30 Jul 20042 Feb 2006Mok Thye LIllumination apparatus and method
US2006006125923 Sep 200423 Mar 2006Negley Gerald HSemiconductor light emitting devices including patternable films comprising transparent silicone and phosphor, and methods of manufacturing same
US2006006328921 Sep 200423 Mar 2006Negley Gerald HMethods of coating semiconductor light emitting elements by evaporating solvent from a suspension
US20060087866 *22 Oct 200427 Abr 2006Ng Kee YLED backlight
US2006009738525 Oct 200411 May 2006Negley Gerald HSolid metal block semiconductor light emitting device mounting substrates and packages including cavities and heat sinks, and methods of packaging same
US20060124953 *14 Dic 200415 Jun 2006Negley Gerald HSemiconductor light emitting device mounting substrates and packages including cavities and cover plates, and methods of packaging same
US2006015265112 Ene 200513 Jul 2006Negley Gerald HSolid colloidal dispersions for backlighting of liquid crystal displays
US20100220472 *3 Mar 20102 Sep 2010Dahm Jonathan SMethod and apparatus for using light emitting diodes
EP0439227A121 Ene 199131 Jul 1991Philips Electronics N.V.Semiconductor device comprising a support, method of manufacturing it, and method of manufacturing the support
EP1045458A229 Jul 199718 Oct 2000Nichia Chemical Industries, Ltd.Light source system and display device
EP1059667A229 Mar 200013 Dic 2000Sanyo Electric Co., Ltd.Hybrid integrated circuit device
EP1139439A122 Feb 20014 Oct 2001Relume CorporationLed integrated heat sink
GB2371629A Título no disponible
JP2000101147A Título no disponible
JP2000174347A Título no disponible
JP2000183405A Título no disponible
JP2000286455A Título no disponible
JP2000286458A Título no disponible
JP2001077427A Título no disponible
JP2001077433A Título no disponible
JP2001144334A Título no disponible
JP2001230453A Título no disponible
JP2002118293A Título no disponible
JP2002158378A Título no disponible
JP2002223004A Título no disponible
JP2002280616A Título no disponible
JP2003017755A Título no disponible
JP2003243718A Título no disponible
JP2003318448A Título no disponible
JPH0983018A Título no disponible
JPH1098215A Título no disponible
JPH04159519A Título no disponible
JPH05152609A Título no disponible
JPH06151974A Título no disponible
JPH06177429A Título no disponible
JPH06244458A Título no disponible
JPH08116095A Título no disponible
JPH08162676A Título no disponible
JPH09146089A Título no disponible
JPH09246603A Título no disponible
JPH10242513A Título no disponible
JPH11261114A Título no disponible
JPH11298047A Título no disponible
WO1997024706A220 Dic 199610 Jul 1997Cree Research, Inc.True color flat panel display using an led dot matrix and led dot matrix drive method and apparatus
WO1997024706A320 Dic 199613 Nov 1997Cree Research IncTrue color flat panel display using an led dot matrix and led dot matrix drive method and apparatus
WO2001043113A123 Nov 200014 Jun 2001Koninklijke Philips Electronics N.V.Display systems incorporating light-emitting diode light source
WO2001061764A130 Nov 200023 Ago 2001Osram Opto Semiconductors GmbhRadiation-emitting semiconductor element, method for production thereof and radiation emitting optical component
WO2002059982A124 Ene 20021 Ago 2002Nichia CorporationLight emitting diode, optical semiconductor elemet and epoxy resin composition suitable for optical semiconductor element and production methods therefor
WO2003056876A213 Dic 200210 Jul 2003Digital Optics International CorporationUniform illumination system
WO2003056876A313 Dic 20024 Dic 2003Digital Optics Internat CorpUniform illumination system
WO2003091771A127 Mar 20036 Nov 2003Koninklijke Philips Electronics N.V.Compact lighting system and display device
Otras citas
Referencia
1"Notification of Transmittal of The International Search Report and the Written Opinion of the International Searching Authority, or the Declaration", "Written Opinion of the International Searching Authority" and "International Search Report", PCT/2004/017326, Jul. 14, 2005.
2Aavid Thermalloy, LLC, Extrusion Profiles, retrieved Oct. 18, 2004 from http://www.aavidthermalloy.com/products/extrusion/index.shtml.
3Andrews, Methods for Packaging A Light Emitting Devices, U.S. Appl. No. 60/557,924, filed Mar. 31, 2004.
4Andrews, Reflector Packages and Methods for Packaging of a Semiconductor Light Emitting Devices, U.S. Appl. No. 60/558,314, filed Mar. 31, 2004.
5Cabot Corporation, Using Nanogel in Daylighting Systems, retrieved Jan. 11, 2005 from http://w1.cabot-corp.com/Controller.jsp? . . . .
6Craford, Overview of Device Issues in High-Brightness Light-Emitting Diodes, Chapter, High Brightness Light Emitting Diodes: Semiconductors and Semimetals, vol. 48, Stringfellow et al. ed., Academic Press, 1997, pp. 47-63.
7Cree, Inc., Cree Optoelectronics LED Product Line, Publication CPR3AX, Rev. D, 2001-2002.
8Heatron, ELPOR® Product Information, retrieved Oct. 6, 2004 from http://www.heatron.com.
9Heatron, Metal Core PCBs for LED Light Engines (Product Brochure), retrieved from http://www.heatron.com.
10International Search Report, PCT/US03/27912, Jan. 30, 2004.
11IRC Advanced Film Division, Insulated Aluminum Substrates (Product Brochure) retrieved from http://www.irctt.com, copyright 2002.
12IRC Advanced Film Division, Thick Film Application Specific Capabilities (Product Brochure), retrieved from http://www.irctt.com, copyright 2002.
13Loh, Power Surface Mount Light Emitting Die Package, U.S. Appl. No. 10/446,532, filed May 27, 2003.
14Morris, IRC's Anotherm(TM) PC Boards Eliminate Heat for Automotive LED Applications, Mar. 16, 2004 Press Release, retrieved Sep. 17, 2004 from http://www.irctt.com/pages/Anotherm-PressRelease.cfm.
15Morris, IRC's Anotherm™ PC Boards Eliminate Heat for Automotive LED Applications, Mar. 16, 2004 Press Release, retrieved Sep. 17, 2004 from http://www.irctt.com/pages/Anotherm-PressRelease.cfm.
16Negley et al., Methods of Coating Semiconductor Light Emitting Elements by Evaporating Solvent From a Suspension, U.S. Appl. No. 10/946,587, filed Sep. 21, 2004.
17Negley et al., Solid Block Mounting Substrates for Semiconductor Light Emitting Devices and Oxidizing Methods for Fabricating Same, U.S. Appl. No. 10/659,108, filed Sep. 9, 2003.
18Negley et al., Solid Colloidal Dispersions for Backlighting of Liquid Crystal Displays, U.S. Appl. No. 11/034,240, filed Jan. 12, 2005.
19Negley et al., Transmissive Optical Elements Including Transparent Plastic Shell Having a Phosphor Dispersed Therein, and Methods of Fabricating Same, U.S. Appl. No. 10/659,240, filed Sep. 9, 2003.
20Negley, Reflective Optical Elements for Semiconductor Light Emitting Devices, U.S. Appl. No. 10/898,608, filed Jul. 23, 2004.
21Negley, Semiconductor Light Emitting Device Mounting Substrates and Packages Including Cavities and Cover Plates, and Methods of Packaging Same, U.S. Appl. No. 11/011,748, filed Dec. 14, 2004.
22Negley, Semiconductor Light Emitting Devices Including Patternable Films Comprising Transparent Silicone and Phosphor, and Methods of Manufacturing Same, U.S. Appl. No. 10/947,704, filed Sep. 23, 2004.
23Negley, Solid Metal Block Semiconductor Light Emitting Devices Mounting Substrates and Packages Including Cavities and Heat Sinks, and Methods of Packaging Same, U.S. Appl. No. 10/972,910, filed Oct. 25, 2004.
24Notification of Transmittal of The International Search Report and The Written Opinion of the International Searching Authority, or the Declaration, International Search Report and Written Opinion of the International Searching Authority, PCT/US2004/017325, Sep. 28, 2004.
25Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration, International Search Report, and Written Opinion of the International Searching Authority, PCT International Application No. PCT/US2004/017326, Jul. 14, 2005.
26Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration, International Search Report, and Written Opinion of the International Searching Authority, PCT International Application No. PCT/US2005/023873, May 8, 2006.
27Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration, International Search Report, and Written Opinion of the International Searching Authority, PCT International Application No. PCT/US2005/043719, May 26, 2006.
28Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration, International Search Report, and Written Opinion of the International Searching Authority, PCT International Application No. PCT/US2005/044805, May 9, 2006.
29Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration, International Search Report, and Written Opinion of the INternational Searching Authority, PCT International Application No. PCT/US2006/000414, May 8, 2006.
30Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration, International Search Report, and Written Opinion of the International Searching Authority, PCT International Application No. PCT/US2006/002117, May 30, 2006.
31Slater, Jr. et al., Phosphor-Coated Light Emitting Diodes Including Tapered Sidewalls and Fabrication Methods Therefor, U.S. Appl. No. 60/411,980, filed Sep. 19, 2002.
Clasificaciones
Clasificación internacionalF21V7/04, G02F1/1335, F21V29/505
Clasificación cooperativaG02F1/133603, G02F2001/133628, G02F1/133605