[미국특허]
Light emitting diode (LED) picture element
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F21V-007/04
F21V-007/00
출원번호
US-0608383
(2003-06-27)
발명자
/ 주소
Ward,Matthew
출원인 / 주소
Element Labs, Inc.
대리인 / 주소
Fliesler Meyer, LLP
인용정보
피인용 횟수 :
41인용 특허 :
20
초록
A picture element lamp is disclosed that mixes light from LEDs in a light guide. The light guide expands the perceived light source and can redirect the light toward viewing locations.
대표청구항▼
The invention claimed is: 1. A display system comprising: a group of lamps, each lamp including different colored LEDs so that the lamps can glow with different color light produced by mixing light of different colored LEDs, each lamp including an edge-lit light guide using substantially total inte
The invention claimed is: 1. A display system comprising: a group of lamps, each lamp including different colored LEDs so that the lamps can glow with different color light produced by mixing light of different colored LEDs, each lamp including an edge-lit light guide using substantially total internal reflection to spread the light over a larger area; and a control unit that drives the colors of the lamps in accordance with a video signal. 2. The system of claim 1, wherein the lamps include a lamp housing. 3. The system of claim 1, wherein the LEDs are positioned on a circuit board. 4. The system of claim 1, wherein the group of lamps is a grid of lamps. 5. The system of claim 4, wherein the pitch between lamps is 20 mm or greater. 6. The system of claim 1, wherein the lamp includes a diffuser plate. 7. The system of claim 6, wherein the diffuser plate increases the contrast of the color. 8. The system of claim 1, wherein light from the LEDs goes into one end of the light guide and comes out the front of the light guide. 9. The system of claim 1, wherein the light guide includes a collimator. 10. The system of claim 1, wherein the light guide includes facets for reflecting light forward. 11. The system of claim 1, wherein the light guide is rectangular. 12. The system of claim 1, wherein the light guide extends out from a base. 13. The system of claim 1, wherein the light guide forms a bulb. 14. The system of claim 13, wherein the bulb includes a center cavity. 15. The system of claim 1, further comprising a frame to hold the group of lamps. 16. The system of claim 15, further comprising an additional frame containing another group of lamps. 17. The system of claim 1, further comprising a video processor adapted to provide the video signal to the control unit. 18. The system of claim 1, wherein the control unit uses a subset of the pixels in the video signal. 19. The system of claim 18, wherein the subset is determined by address information. 20. A display system comprising: a group of lamps, at least some of the lamps being greater than or equal to 20 mm in pixel size and using at least one LED to produce light of different colors, the lamps including an edge-lit light guide using substantially total internal reflection; and a control unit that sets the color of the lamps in accordance with a video signal. 21. The system of claim 20, wherein the lamps include a light guide to spread the light over a wider area. 22. The system of claim 21, wherein light from different colored LEDs is mixed in the light guide. 23. The system of claim 20, wherein the group of lamps is a grid of lamps. 24. The system of claim 20, wherein multiple LEDs or LED clusters on a lamp are driven with the same signal to create a single pixel lamp. 25. The system of claim 20, wherein the LED is an organic LED. 26. The system of claim 20, wherein the LED is an polymer LED. 27. A display system comprising: a group of lamps, each lamps including LEDs an edge-lit light guide substantially total internal using reflections to spread the light over a larger area; and a control unit that adjusts the intensity of the LEDs in accordance with a video signal. 28. The system of claim 27 wherein the lamp has multiple colored LEDs and the control unit is adapted to drive the colors of the lamps in accordance with the video signal. 29. The system of claim 27, wherein the lamps include a lamp housing. 30. The system of claim 27, wherein the LEDs are positioned on a circuit board. 31. The system of claim 27, wherein the group of lamps is a grid of lamps. 32. The system of claim 31, wherein the pitch between lamps is 20 mm or greater. 33. The system of claim 27, wherein the lamp includes a diffuser plate. 34. The system of claim 33, wherein the diffuser plate increases the contrast of the color. 35. The system of claim 27, wherein light from the LEDs goes into one end of the light guide and comes out the front of the light guide. 36. The system of claim 27, wherein the light guide includes a collimator. 37. The system of claim 27, wherein the light guide includes facets for reflecting light forward. 38. The system of claim 27, wherein the light guide is rectangular. 39. The system of claim 27, wherein the light guide extends out from a base. 40. The system of claim 27, wherein the light guide forms a bulb. 41. The system of claim 40, wherein the bulb includes a center cavity. 42. The system of claim 27, further comprising a frame to hold the group of lamps. 43. The system of claim 42, further comprising an additional frame containing another group of lamps. 44. The system of claim 27, further comprising a video processor adapted to provide the video signal to the control unit. 45. The system of claim 27, wherein the control unit uses a subset of the pixels in the video signal. 46. The system of claim 45, wherein the subset is determined by address information. 47. A display system including: a frame; a number of edge-lit tiles in the frame, each edge-lit tile having different colored LEDs mounted to a side end surface of the tile, the tile using substantially total internal reflection to mix the light from the different colored LEDs and glow from a second surface that is not opposite to the first surface; and a control unit that uses a video signal to cause each of the lamps to glow with a color as determined by the video signal. 48. A display system comprising: a number of picture elements, each picture element including edge-lit light guide, each edge-lit picture elements with different colored LEDs mounted to a side end surface, the light guide using substantially total internal reflection to mix the light from the different colored LEDs and distribute the light in a 360 degree pattern; and a control unit that uses a video signal to cause each of the picture elements to glow with a color as determined by the video signal.
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