Liquid crystal display systems including LEDs

• US 20070211184A1
• Filed: 05/05/2006
• Published: 09/13/2007
• Est. Priority Date: 03/10/2006
• Status: Abandoned Application

• Current Assignee: Rambus International Ltd (Rambus Inc.)
• Original Assignee: Luminus Devices Incorporated (Sanan Optoelectronics Company Limited)
• Inventors: Karlicek, Robert, Erchak, Alexei
• Application Number:
  US11/429,649
• Publication Number:
  US 20070211184A1
• Time in Patent Office: Days
• US Class Current: 349/1
• CPC Class Codes: G02B 6/0028 Light guide, e.g. taper
• CPC Class Codes: G02B 6/0036 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133628 with cooling means
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48111 the wire connector extending above another semiconductor or solid-state body
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details

Abstract

Display systems, such as liquid crystal display systems (LCDs) that include light-emitting diodes (LEDs) as light sources are described. In certain embodiments, high-brightness LEDs are used to illuminate the display system, in combination with thermal management systems and other components described herein. The systems may be designed to use fewer numbers of LEDs for illumination while achieving a brightness comparable to, or exceeding, certain existing display systems of similar size.

Claims

1. A liquid crystal display system, comprising:

a liquid crystal display panel having an illumination area; and

at least one LED associated with the liquid crystal display panel such that light emitted from the LED illuminates the liquid crystal display panel,

wherein the number of LEDs per m² of the illumination area is less than 100.

2. A liquid crystal display system as in claim 1, wherein the liquid crystal display panel is back-lit.

3. A liquid crystal display system as in claim 1, wherein the liquid crystal display panel is edge-lit.

4. A liquid crystal display system as in claim 1, wherein the liquid crystal display panel is corner-lit.

5. A liquid crystal display system as in claim 1, wherein the liquid crystal display panel achieves a brightness of at least 5,000 nits.

6. A liquid crystal display system as in claim 1, wherein the liquid crystal display panel achieves a brightness of at least 10,000 nits.

7. A liquid crystal display system as in claim 1, wherein the liquid crystal display panel achieves a brightness of at least 15,000 nits.

8. A liquid crystal display system as in claim 1, wherein the LED is a red-green-blue LED.

9. A liquid crystal display system as in claim 1, wherein the LED is a red-green-blue-yellow LED.

10. A liquid crystal display system as in claim 1, wherein the LED is a red-green-blue-cyan-yellow LED.

11. A liquid crystal display system as in claim 1, wherein the LED is a single-colored LED.

12. A liquid crystal display system as in claim 1, wherein the LED comprises a photonic lattice.

13. A liquid crystal display system, comprising:

a liquid crystal display panel having an illumination area between 0.01 and 0.16 m²; and

a single LED associated with the liquid crystal display panel such that light emitted from the single LED illuminates the liquid crystal display panel.

14. A liquid crystal display system as in claim 13, wherein the liquid crystal display panel is back-lit.

15. A liquid crystal display system as in claim 13, wherein the liquid crystal display panel is edge-lit.

16. A liquid crystal display system as in claim 13, wherein the liquid crystal display panel is corner-lit.

17. A liquid crystal display system as in claim 13, wherein the liquid crystal display panel achieves a brightness of at least 5,000 nits.

18. A liquid crystal display system as in claim 13, wherein the liquid crystal display panel achieves a brightness of at least 10,000 nits.

19. A liquid crystal display system as in claim 13, wherein the liquid crystal display panel achieves a brightness of at least 15,000 nits.

20. A liquid crystal display system as in claim 13, wherein the LED is a red-green-blue LED.

21. A liquid crystal display system as in claim 13, wherein the LED is a red-green-blue-yellow LED.

22. A liquid crystal display system as in claim 13, wherein the LED is a red-green-blue-yellow-cyan LED.

23. A liquid crystal display system as in claim 13, wherein the LED comprises a photonic lattice.

24. A liquid crystal display system, comprising:

a liquid crystal display panel having an illumination area between 0.06 and 0.16 m²; and

at least one LED associated with the liquid crystal display panel such that light emitted from the at least one LED illuminates the liquid crystal display panel,

wherein the total number of LEDs is less than 20.

25. A liquid crystal display system as in claim 24, wherein the liquid crystal display panel is back-lit.

26. A liquid crystal display system as in claim 24, wherein the liquid crystal display panel is edge-lit.

27. A liquid crystal display system as in claim 24, wherein the liquid crystal display panel is corner-lit.

28. A liquid crystal display system as in claim 24, wherein the LED comprises a photonic lattice.

29. A liquid crystal display system, comprising:

a liquid crystal display panel having an illumination area between 0.16 and 0.6 m²; and

at least one LED associated with the liquid crystal display panel such that light emitted from the at least one LED illuminates the liquid crystal display panel,

wherein the total number of LEDs is between 2 and 50.

30. A liquid crystal display system as in claim 29, wherein the liquid crystal display panel is back-lit.

31. A liquid crystal display system as in claim 29, wherein the liquid crystal display panel is edge-lit.

32. A liquid crystal display system as in claim 29, wherein the liquid crystal display panel is corner-lit.

33. A liquid crystal display system as in claim 29, wherein the LED comprises a photonic lattice.

34. A liquid crystal display system, comprising:

a liquid crystal display panel having an illumination area between 0.6 and 1.0 m²; and

at least one LED associated with the liquid crystal display panel such that light emitted from the at least one LED illuminates the liquid crystal display panel,

wherein the total number of LEDs is between 10 and 100.

35. A liquid crystal display system as in claim 34, wherein the liquid crystal display panel is back-lit.

36. A liquid crystal display system as in claim 34, wherein the liquid crystal display panel is edge-lit.

37. A liquid crystal display system as in claim 34, wherein the liquid crystal display panel is corner-lit.

38. A liquid crystal display system as in claim 34, wherein the LED comprises a photonic lattice.

39. A liquid crystal display system, comprising:

a liquid crystal display panel having an illumination area greater than 0.45 m²; and

at least one LED associated with the liquid crystal display panel such that light emitted from the at least one LED illuminates the liquid crystal display panel,

wherein the total number of LEDs is less than 100.

40. A liquid crystal display system as in claim 39, wherein the liquid crystal display panel is back-lit.

41. A liquid crystal display system as in claim 39, wherein the liquid crystal display panel is edge-lit.

42. A liquid crystal display system as in claim 39, wherein the liquid crystal display panel is corner-lit.

43. A liquid crystal display system as in claim 39, wherein the LED comprises a photonic lattice.

44. A monitor, comprising:

a display panel; and

a single LED associated with the display panel such that light emitted from the single LED illuminates the display panel.

45. A monitor as in claim 44, wherein the display panel is a 7 inch panel.

46. A monitor as in claim 44, wherein the display panel is a 15 inch panel.

47. A monitor as in claim 44, wherein the display panel is a 17 inch panel.

48. A monitor as in claim 44, wherein the display panel is a 19 inch panel.

49. A monitor as in claim 44, wherein the display panel is a 24 inch panel.

50. A monitor as in claim 44, wherein the liquid crystal display panel is back-lit.

51. A monitor as in claim 44, wherein the liquid crystal display panel is edge-lit.

52. A monitor as in claim 44, wherein the liquid crystal display panel is corner-lit.

53. A monitor as in claim 44, wherein the monitor is a computer monitor.

54. A monitor as in claim 44, wherein the monitor is a laptop monitor.

55. A monitor as in claim 44, wherein the monitor is a television monitor.

56. A monitor as in claim 44, wherein the LED comprises a photonic lattice.

57. A monitor, comprising:

a display panel having an illumination area between 0.06 and 0.30 m²; and

less than 20 LEDs associated with the display panel such that light emitted from the LEDs illuminates the display panel.

58. A monitor, comprising:

a liquid crystal display panel having an illumination area greater than 0.45 m²; and

at least one LED associated with the liquid crystal display panel such that light emitted from the at least one LED illuminates the liquid crystal display panel,

wherein the total number of LEDs is less than 100.

59. A monitor as in claim 58, wherein the liquid crystal display panel is back-lit.

60. A monitor as in claim 58, wherein the liquid crystal display panel is edge-lit.

61. A monitor as in claim 58, wherein the liquid crystal display panel is corner-lit.

62. A monitor as in claim 58, wherein the monitor is a computer monitor.

63. A monitor as in claim 58, wherein the monitor is a laptop monitor.

64. A monitor as in claim 58, wherein the monitor is a television monitor.

65. A monitor as in claim 58, wherein the LED comprises a photonic lattice.