Backlight Module and Liquid Crystal Display Device Using the Same

• US 20100128195A1
• Filed: 11/17/2009
• Published: 05/27/2010
• Est. Priority Date: 11/21/2008
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Hsu, Po-Tang, Hsu, Chih-Fu, Ko, Chien-Ming, Li, Yueh-Han
• Application Number:
  US12/619,875
• Publication Number:
  US 20100128195A1
• Time in Patent Office: Days
• US Class Current: 349/58
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133605 including specially adapted reflectors
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G02F 2203/68 Green display, e.g. recycling, reduction of harmful substances

Abstract

The present invention is a backlight module including a housing, a reflective sheet, and a light source module. The housing has an inner side surface, an outer side surface, and a plurality of first openings. The reflective sheet is disposed on the inner side surface and has a plurality of second openings corresponding to the first openings. The light source module has a plurality of light sources, wherein the light source module is disposed on the outer side surface, and each of the light sources may penetrate each of the first openings and the second openings. When the light sources are dimmed or have other problems, the light source module can be taken apart from the housing to repair them easily.

Claims

1. A backlight module, comprising:

a housing having an inner side surface, an outer side surface, and a plurality of first openings;

a reflective sheet disposed on the inner side surface, the reflective sheet having a plurality of second openings corresponding to the first openings; and

a light source module having a plurality of light sources, wherein the light source module is disposed on the outer side surface, the light sources penetrate the first openings and the second openings.

2. The backlight module of claim 1, wherein the housing further includes a back wall, and the inner side surface and the outer side surface respectively form opposite two surfaces of the back wall.

3. The backlight module of claim 1, further comprising of a plurality of optical films disposed parallel to the reflective sheet.

4. The backlight module of claim 1, wherein each of the light sources penetrates each of the first openings and the second openings.

5. The backlight module of claim 4, wherein a cross-section of each of the light source along a direction parallel to the housing corresponds to a shape of each of the first openings.

6. The backlight module of claim 1, wherein the light source module is composed of a printed circuit board with the light sources disposed thereon, the printed circuit board is disposed outside the outer side surface of the housing.

7. The backlight module of claim 6, wherein an upper surface of the printed circuit board is unexposed in the first openings.

8. The backlight module of claim 1, further comprising a heat dissipation unit disposed on the other side of the light source module opposite to the light sources.

9. The backlight module of claim 8, wherein the heat dissipation unit includes a heat sink, a heat pipe, or a heat dissipation post.

10. The backlight module of claim 1, wherein the light source module includes a light emitting diode module, and the light sources include a plurality of light emitting diode light sources.

11. A display device, comprising:

a liquid crystal display panel;

a front frame; and

a backlight module disposed in the front frame and under the liquid crystal display panel, the backlight module including;

a housing having an inner side surface, an outer side surface, and a plurality of first openings;

a reflective sheet disposed on the inner side surface, the reflective sheet having a plurality of second openings corresponding to the first openings; and

a light source module having a plurality of light sources, wherein the light source module is disposed on the outer side surface, and the light sources penetrate the first openings and the second openings;

wherein the front frame and the housing enclose the backlight module, the reflective sheet, and the liquid crystal display panel therein.

12. The display device of claim 11, wherein the housing further includes a back wall, and the inner side surface and the outer side surface respectively form two opposite sides of the back wall.

13. The display device of claim 11, further comprising a plurality of optical films disposed between the reflective sheet and the liquid crystal display panel and parallel to the reflective sheet.

14. The display device of claim 11, wherein each of the light sources penetrates each of the first openings and the second openings.

15. The display device of claim 14, wherein a cross-section of each of the light source along a direction parallel to the housing corresponds to a shape of each of the first openings.

16. The display device of claim 11, wherein the light source module is composed of a printed circuit board with the light sources disposed thereon, the printed circuit board is disposed outside the outer side surface of the housing.

17. The display device of claim 16, wherein an upper surface of the printed circuit board is unexposed in the first openings.

18. The display device of claim 11, further comprising a heat dissipation unit disposed on the other side of the light source module opposite to the light sources.

19. The display device of claim 18, wherein the heat dissipation unit includes a heat sink, a heat pipe, or a heat dissipation post.

20. The display device of claim 11, wherein the light source module includes a light emitting diode module, and the light sources include a plurality of light emitting diode light sources.