BACKLIGHT MODULE AND DISPLAY DEVICE HAVING THE SAME

• US 20140152940A1
• Filed: 12/03/2013
• Published: 06/05/2014
• Est. Priority Date: 12/04/2012
• Status: Active Grant

• Current Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Wang, Fei, Bu, Zhanchang
• Granted Patent: US 9,304,241 B2
• Time in Patent Office: Days
• US Class Current: 349/62
• CPC Class Codes: G02B 6/0011 the light guides being planar or of plate-like form
• 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: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133314 Back frames
• CPC Class Codes: G02F 1/133628 with cooling means

Abstract

A backlight module includes: a frame; a backboard configured to support the frame; a radiator provided in the backboard and connected to an inner wall of the frame; a light source fixed to an inner wall of the radiator; a light guide plate relatively slidably mounted on the radiator and configured to guide light emitted by the light source; and at least one buffer mounted on the radiator and configured so that the radiator is moveable relative to the backboard against an elastic force of the buffer. The backlight module can effectively eliminate the phenomenon in which a shadow of the light source is present in pictures coming from the backlight module since the light guide plate presses against the light source after it is heated to expand. The present invention further provides a display device including the above backlight module.

Claims

1. A backlight module, including:

a frame;

a backboard configured to support the frame;

a radiator provided in the backboard and connected to an inner wall of the frame;

a light source fixed to an inner wall of the radiator;

a light guide plate relatively slidably mounted on the radiator and configured to guide light emitted by the light source; and

at least one buffer mounted on the radiator and configured so that the radiator is moveable relative to the backboard against an elastic force of the buffer.

2. The backlight module according to claim 1, wherein each buffer includes a bolt by which the radiator is provided on the backboard and a flexible gasket provided between a screw rod of the bolt and the radiator, and a receiving hole for receiving the flexible gasket is provided in a portion of the radiator where the bolt is mounted.

3. The backlight module according to claim 2, wherein the flexible gasket is made of silica gel or foam.

4. The backlight module according to claim 2, wherein there is further provided a washer between a screw cap of the bolt and the radiator.

5. The backlight module according to claim 4, wherein the washer is made of ABS or nylon.

6. The backlight module according to claim 1, wherein the buffer is uniformly distributed on the radiator.

7. The backlight module according to claim 1, wherein the light source is fixed on the radiator by bolts.

8. The backlight module according to claim 1, wherein the radiator is made of aluminum.

9. The backlight module according to claim 2, wherein,

the backboard includes a first body and a first vertical wall extending vertically from a periphery of the first body;

the radiator includes second body mounted on the first body and a second vertical wall extending vertically from one edge of the second body; and

a vertical portion of the frame is clamped between the first vertical wall and the second vertical wall.

10. The backlight module according to claim 9, wherein the receiving hole is formed in the second body of the radiator.

11. The backlight module according to claim 1, wherein the buffer is provided between a vertical wall of the radiator and a vertical portion of the frame.

12. A display device, including:

display screen; and

the backlight module according to claim 1, wherein the display screen is supported on the frame of the backlight module.

13. The display device according to claim 12, wherein each buffer includes a bolt by which the radiator is provided on the backboard and a flexible gasket provided between a screw rod of the bolt and the radiator, and a receiving hole for receiving the flexible gasket is provided in a portion of the radiator where the bolt is mounted.

14. The display device according to claim 13, wherein the flexible gasket is made of silica gel or foam.

15. The display device according to claim 13, wherein there is further provided a washer between a screw cap of the bolt and the radiator.

16. The display device according to claim 12, wherein the buffer is uniformly distributed on the radiator.

17. The display device according to claim 13, wherein,

the backboard includes first body and a first vertical wall extending vertically from a periphery of the first body;

the radiator includes a second body mounted on the first body and a second vertical wall extending vertically from one edge of the second body; and

a vertical portion of the frame is clamped between the first vertical wall and the second vertical wall.

18. The display device according to claim 17, wherein the receiving hole is formed in the second body of the radiator.

19. The display device according to claim 12, wherein the buffer is provided between a vertical wall of the radiator and a vertical portion of the frame.