Backlight module and liquid crystal display including the same

• US 9,372,301 B2
• Filed: 01/24/2014
• Issued: 06/21/2016
• Est. Priority Date: 08/09/2013
• 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: Hsiao, Yu Chun, Chen, Shih Hsiang, Zhou, Gege
• Primary Examiner(s): Hanley, Britt D
• Application Number:
  US14/240,358
• Publication Number:
  US 20150212257A1
• Time in Patent Office: 879 Days
• Field of Search: None
• US Class Current: 1/1
• 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 6/0091 of the light source relative to the light guide G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133322 Mechanical guidance or alignment of LCD panel support components
• CPC Class Codes: G02F 1/133628 with cooling means
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/503 Arrangements improving the resistance to shock

Abstract

The present disclosure relates to a backlight module and a liquid crystal display using the backlight module. The backlight module comprises an outer frame, a glue frame, a bending heat dissipating plate, and a light guide plate all amounted within the outer frame, a light source lamp facing the light guide plate being arranged on the side wall of the heat dissipating plate at the light-incoming side of the light guide plate. An inserting port is formed on the glue frame, a first positioning hole corresponding to the inserting port is formed on the side wall of the heat dissipating plate at the light-incoming side of the light guide plate, and a second positioning hole corresponding to the first positioning hole is formed on the outer frame. The portion of the outer frame around the second positioning hole is depressed inwards and extends into the inserting port to position the glue frame. The outer frame, the glue frame, and the heat dissipating plate are fixed together by a fixing bolt passing through the first positioning hole and the second positioning hole. The backlight module according to the present disclosure is able to greatly narrow the frame of the liquid crystal display without causing other problems to the liquid crystal display.

Claims

1. A backlight module, comprising

an outer frame, and a glue frame, a bent heat dissipating plate and a light guide plate all mounted within the outer frame, a light source lamp facing the light guide plate being arranged on the side wall of the heat dissipating plate at the light-incoming side of the light guide plate,

wherein:

an inserting port is formed on the glue frame,

a first positioning hole corresponding to the inserting port is formed on the side wall of the heat dissipating plate at the light-incoming side of the light guide plate, and a second positioning hole corresponding to the first positioning hole is formed on the outer frame,

the portion of the outer frame around the second positioning hole is depressed inwards and extends into the inserting port to position the glue frame, and the outer frame, the glue frame and the heat dissipating plate are fixed together by a fixing bolt passing through the first positioning hole and the second positioning hole,

the fixing bolt comprises a body with a cylinder and an accommodation groove, and a screw in cooperation with the accommodation groove, and

when being assembled, the cylinder is fixedly connected to the first positioning hole, and the accommodation groove, facing away from the light guide plate, is accommodated in the second positioning hole, with the screw fixedly coupled to the accommodation groove from a region outside the outer frame and compressing the outer frame.

2. The backlight module according to claim 1, wherein the cross section of the cylinder is smaller than that of the accommodation groove.

3. The backlight module according to claim 2, wherein the cylinder is in rivet connection with the first positioning hole, and the screw is in threaded connection with the accommodation groove.

4. The backlight module according to claim 3, wherein the cylinder of the fixing bolt does not protrude out of the inner surface of the heat dissipating plate.

5. The backlight module according to claim 4, wherein the screw does not protrude out of the plane of the outer frame.

6. The backlight module according to claim 1, wherein the fixing bolt comprises a cylinder and a locking cap in cooperation with the cylinder,

when being assembled, the cylinder is configured to extend through the first positioning hole and the second positioning hole, with a first end portion of the cylinder being fixedly connected to the first positioning hole, and the locking cap is fixedly coupled to a second end portion of the cylinder from a region outside of the outer frame.

7. The backlight module according to claim 6, wherein the cylinder is in the shape of a stepped shaft, a portion with relatively small cross-section in the cylinder being the first end portion and a portion with relatively large cross-section being the second end portion.

8. The backlight module according to claim 7, wherein the first end portion of the cylinder is in rivet connection with the first positioning hole and the locking cap is in threaded connection with the second end portion of the cylinder.

9. The backlight module according to claim 8, wherein the first end portion of the cylinder does not protrude out of the inner surface of the heat dissipating plate.

10. The backlight module according to claim 9, wherein neither the second end portion of the cylinder nor the locking cap protrudes out of the plane of the outer frame.

11. A liquid crystal display including the backlight module according to claim 1.