Backlight module

• US 9,417,374 B2
• Filed: 01/17/2014
• Issued: 08/16/2016
• Est. Priority Date: 11/08/2013
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Zhang, Yanxue, Hsiao, YuChun
• Primary Examiner(s): Hanley, Britt D
• Application Number:
  US14/240,353
• Publication Number:
  US 20150153502A1
• Time in Patent Office: 942 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• 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 1/133615 Edge-illuminating devices, i.e. illuminating from the side

Abstract

The present disclosure relates to a backlight module, including a backlight frame and a light guide plate placed inside the backlight frame, wherein a light-emitting element is provided at the inner side of a side wall of the backlight frame, a first reflective sheet is provided at a lower location under the light guide plate along the vertical direction, and a second reflective sheet is provided at a lower location under the light-emitting element along the vertical direction, the second reflective sheet being extended towards the inside of the backlight frame to a lower location under the light guide plate along the vertical direction. Through providing the second reflective sheet located under the light-emitting element and extending to a lower location under the light guide plate, the light scattered out under the light-emitting element can be guided into the light guide plate, thus effectively enhancing the efficiency of incident light guided into the light guide plate from the light-emitting element.

Claims

1. A backlight module, comprising:

a backlight frame; and

a light guide plate placed inside the backlight frame;

wherein;

a light-emitting element is provided at the inner side of a side wall of the backlight frame, and a first reflective sheet is provided at a lower location under the light guide plate along the vertical direction,

a second reflective sheet is provided at a lower location under the light-emitting element along the vertical direction, and the second reflective sheet extends towards the inside of the backlight frame to a lower location under the light guide plate along the vertical direction,

an elastic supporting member for buffering is provided between a lower location under the light guide plate along the vertical direction and an upper location above the bottom of the backlight frame along the vertical direction, and an accommodation recess for receiving the second reflective sheet is formed on the top of the elastic supporting member along the vertical direction, and

the second reflective sheet is engaged into the accommodation recess.

2. The backlight module according to claim 1, wherein the second reflective sheet is located under the first reflective sheet along the vertical direction.

3. The backlight module according to claim 1, wherein the first reflective sheet extends towards the side wall of the backlight frame to a lower location under the light-emitting element along the vertical direction.

4. The backlight module according to claim 2, wherein the first reflective sheet extends towards the side wall of the backlight frame to a lower location under the light-emitting element along the vertical direction.

5. The backlight module according to claim 1, wherein the second reflective sheet is bonded into the accommodation recess.

6. The backlight module according to claim 1, wherein a cooling fin is further provided between the light-emitting element and the backlight frame.

7. The backlight module according to claim 2, wherein a cooling fin is further provided between the light-emitting element and the backlight frame.

8. The backlight module according to claim 1, wherein the light guide plate is secured to the backlight frame from inside using a snap plate via a snap connection.

9. The backlight module according to claim 2, wherein the light guide plate is secured to the backlight frame from inside using a snap plate via a snap connection.

10. The backlight module according to claim 1, wherein the light-emitting element is an LED light source.

11. The backlight module according to claim 2, wherein the light-emitting element is an LED light source.