FLAT PANEL DISPLAY HAVING BACKLIGHT MODULE

• US 20070189042A1
• Filed: 02/07/2007
• Published: 08/16/2007
• Est. Priority Date: 02/08/2006
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: Chi Mei Optoelectronics (InnoLux Corporation)
• Inventors: Lin, Wen-Tsung, Pai, Wei-Ming, Lan, Wen-Chin
• Application Number:
  US11/672,257
• Publication Number:
  US 20070189042A1
• Time in Patent Office: Days
• US Class Current: 362/632
• CPC Class Codes: F21V 29/763 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133612 Electrical details
• CPC Class Codes: G02F 1/133628 with cooling means
• CPC Class Codes: H05K 1/056 the metal substrate being covered by an organic insulating layer
• CPC Class Codes: H05K 3/0058 Laminating printed circuit boards onto other substrates, e.g. metallic substrates H05K1/0281 takes precedence

Abstract

A backlight module includes a metal back plate having a front surface, an insulating layer disposed on the front surface of the metal back plate, a metal layout layer disposed on the insulating layer, the metal layout layer including signal lines, and at least one light emitting diode coupled to the signal lines of the metal layout layer.

Claims

1. A backlight module comprising:

a metal back plate having a front surface;

an insulating layer disposed on the front surface of the metal back plate;

a metal layout layer disposed on the insulating layer, the metal layout layer comprising signal lines; and

at least one light emitting diode coupled to the signal lines of the metal layout layer.

2. The backlight module of claim 1 wherein the insulating layer comprises at least one of a fiber reinforced epoxy substrate and a composite epoxy substrate.

3. The backlight module of claim 1 wherein the insulating layer comprises a heat dissipating compound that is an electrically insulating material.

4. The backlight module of claim 1, further comprising at least one heat dissipating fin disposed on a back surface of the metal back plate.

5. The backlight module of claim 1, further comprising an optical film disposed between the light emitting diode and a liquid crystal layer, the optical film being held in place by a portion of the metal back plate.

6. The backlight module of claim 5 wherein the optical film comprises at least one of a prism film, a diffuser, and a brightness enhancement film.

7. A display comprising:

a spatial light modulator;

an optical film;

a backlight module comprising

a metal back plate having a front surface;

an electrically insulating layer disposed on the front surface of the metal back plate;

a metal layout layer disposed on the electrically insulating layer, the metal layout layer comprising signal lines; and

at least one light emitting diode coupled to the signal lines of the metal layout layer;

wherein the metal back plate is configured to provide a structural support for the optical film, and the optical film is configured to process light from the at least one light emitting diode before the light reaches the spatial light modulator.

8. The display of claim 7 wherein the optical film comprises at least one of a prism film, a diffuser, and a brightness enhancement film.

9. The display of claim 7 wherein the spatial light modulator comprises liquid crystal cells.

10. The display of claim 7 wherein the spatial light modulator is held between a front frame and a back frame.

11. The display of claim 10 wherein the optical film is held between the back frame and the metal back plate.

12. A display comprising:

a spatial light modulator;

a light guide plate having an edge having a lateral surface, the light guide plate having a front surface facing the spatial light modulator;

an edge-lit backlight module comprising

a metal back plate to provide structural support for the light guide plate;

an electrically insulating layer disposed on a surface of the metal back plate, the surface of the metal back plate facing the lateral surface of the light guide plate;

a metal layout layer disposed on the electrically insulating layer, the metal layout layer comprising signal lines; and

at least one light emitting diode coupled to the signal lines of the metal layout layer;

wherein the lateral surface of the light guide plate is configured to receive light from the at least one light emitting diode and direct the light from the front surface of the light guide plate towards the spatial light modulator.

13. The display of claim 12 wherein the metal back plate has a shape configured to receive and support an edge of the light guide plate, the edge having the lateral surface.

14. The display of claim 12 wherein the spatial light modulator comprises liquid crystal cells.

15. The display of claim 12 wherein the metal back plate comprises heat dissipating fins.

16. A backlight module, comprising:

a light guide plate having a lateral surface;

a metal back plate having a front surface, the metal back plate having a shape configured to receive and support a portion of the light guide plate, the front surface of the metal back plate facing the lateral surface of the light guide plate;

an insulating layer disposed on the front surface of the metal back plate;

a metal layout layer disposed on the insulating layer, the metal layout layer comprising signal lines; and

at least one light emitting diode coupled to the signal lines of the metal layout layer.

17. The backlight module of claim 16 wherein the insulating layer comprises at least one of a fiber reinforced epoxy substrate and a composite epoxy substrate.

18. The backlight module of claim 16 wherein the insulating layer comprises a heat dissipating compound that is an electrically insulating material.

19. The backlight module of claim 16, further comprising at least one heat dissipating fin disposed on a back surface of the metal back plate.

20. The backlight module of claim 16, further comprising a reflector disposed on a back surface of the light guide plate, the lateral surface connected to an edge of the front surface and an edge of the back surface.

21. The backlight module of claim 16, further comprising an optical film disposed on the front surface of the light guide plate.

22. The backlight module of claim 21, wherein the optical film comprises at least one of a prism, a diffuser, and a brightness enhancement film.

23. A liquid crystal display comprising:

a backlight module comprising;

a metal back plate having a front surface,

an insulating layer disposed on the front surface of the metal back plate,

a metal layout layer disposed on the insulating layer, and

at least one light emitting diode coupled to the metal layout layer; and

a liquid crystal panel disposed in front of the at least one light emitting diode.

24. The liquid crystal display of claim 23 wherein the insulating layer comprises at least one of a fiber reinforced epoxy substrate and a composite epoxy substrate.

25. The liquid crystal display of claim 23 wherein the insulating layer comprises a heat dissipating compound that is an electric insulator.

26. The liquid crystal display of claim 23 wherein the backlight module comprises at least one heat dissipating fin disposed on a back surface of the metal back plate.

27. The liquid crystal display of claim 23, further comprising an optical film between the light emitting diode and the liquid crystal panel.

28. The liquid crystal display of claim 27 wherein the optical film comprises at least one of a prism, a diffuser, and a brightness enhancement film.

29. A liquid crystal display, comprising:

a backlight module comprising;

a light guide plate having a lateral surface and a top surface,

a metal back plate having a front surface and a shape configured to receive and support a portion of the light guide plate, the front surface of the metal back plate facing the lateral surface of the light guide plate,

an electrically insulating layer disposed on the front surface of the metal back plate,

a metal layout layer disposed on the electrically insulating layer, and

at least one light emitting diode coupled to the metal layout layer; and

a liquid crystal panel disposed in front of the front surface of the metal back plate.

30. The liquid crystal display of claim 29 wherein the insulating layer comprises at least one of a fiber reinforced epoxy substrate and a composite epoxy substrate.

31. The liquid crystal display of claim 29 wherein the insulating layer comprises a heat dissipating compound that is an electric insulator.

32. The liquid crystal display of claim 29 wherein the backlight module comprises at least one heat dissipating fin disposed on a back surface of the metal back plate.

33. The liquid crystal display of claim 29, further comprising an optical film disposed between the front surface of the metal back plate and the liquid crystal panel.

34. The liquid crystal display of claim 33 wherein the optical film comprises at least one of a prism, a diffuser, and a brightness enhancement film.

35. The liquid crystal display of claim 29 wherein the backlight module comprises a reflector disposed at a bottom surface of the light guide plate.