LIQUID CRYSTAL DISPLAY AND BACKLIGHT MODULE

• US 20080074580A1
• Filed: 09/21/2006
• Published: 03/27/2008
• Est. Priority Date: 09/21/2006
• Status: Active Grant

• Current Assignee: HannStar Display Corporation
• Original Assignee: HannStar Display Corporation
• Inventors: Chang, Chih-Li
• Granted Patent: US 7,671,936 B2
• Time in Patent Office: Days
• US Class Current: 349/65
• 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 6/009 of the light source in the package G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side

Abstract

A liquid crystal display has a light guide plate, a liquid crystal panel disposed on the light guide plate, a frame having a compartment for containing the light guide plate and a frame wall having an opening and a light bar cavity, and a light bar buried in the light bar cavity via the opening.

Claims

1. A liquid crystal display, comprising:

a light guide plate;

a liquid crystal panel disposed on the light guide plate;

a frame having a compartment for containing the light guide plate and a frame wall having an opening and a light bar cavity; and

a light bar buried in the light bar cavity via the opening.

2. The liquid crystal display of claim 1, wherein the light bar comprises a substrate and a light source positioned on a surface of the substrate.

3. The liquid crystal display of claim 2, wherein the surface faces the light guide plate.

4. The liquid crystal display of claim 2, wherein the substrate is a printed circuit board.

5. The liquid crystal display of claim 2, wherein the substrate comprises a conductive pad.

6. The liquid crystal display of claim 2, wherein the substrate has a hole.

7. The liquid crystal display of claim 2, wherein the light source is a light emitting diode.

8. The liquid crystal display of claim 7, wherein the light emitting diode is a side-view light emitting diode, a top-view light emitting diode, or a white light emitting diode.

9. The liquid crystal display of claim 2, wherein the opening has a narrow portion and a broad portion.

10. The liquid crystal display of claim 9, wherein a height of the narrow portion is equal to or lager than a thickness of the substrate.

11. The liquid crystal display of claim 9, wherein a height of the broad portion is equal to or larger than a thickness of the substrate and the light source.

12. The liquid crystal display of claim 9, wherein a width of the broad portions is equal to or larger than the width of light source.

13. The liquid crystal display of claim 2, wherein the divergence angle of the light source is ±

80 degrees.

14. The liquid crystal display of claim 13, wherein the divergence angle of the light source is ±

60 degrees.

15. The liquid crystal display of claim 1, wherein a height of the opening is equal to or larger than the thickness of the light bar.

16. The liquid crystal display of claim 1, wherein the frame is composed of materials with high reflectivity material or white material.

17. The liquid crystal display of claim 1, wherein the frame is composed of light absorbed material or black material.

18. The liquid crystal display of claim 1, further comprises a screw securing the light bar.

19. The liquid crystal display of claim 1, further comprises a tape securing the light bar.

20. The liquid crystal display of claim 1, wherein the frame comprises a fixing strip supporting the light guide plate.

21. A backlight module, comprising:

a light guide plate;

a frame having a compartment for containing the light guide plate and a frame wall having an opening and a light bar cavity; and

a light bar buried in the light bar cavity via the opening, wherein an outer side of the light bar is exposed from the frame.