Backlight module and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10310330-B2
Application number	US-201715566710-A
Country	US
Kind code	B2
Filing date	Apr 18, 2017
Priority date	Mar 17, 2017
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

A backlight module and liquid crystal display device are provided. The backlight module comprises a plastic frame, a reflection sheet, a light guide plate, a light source element, a hole glue and a heat dissipating element. The plastic frame comprises a first frame and a second frame disposed opposite each other. The heat dissipating element is disposed on the light source element, extending along an outer side surface of the first frame to a bottom portion of the reflection sheet, and is bonded to the corresponding hole glue on the second frame.

First claim

What is claimed is:

1. A backlight module, comprising:
a plastic frame comprising a first frame and a second frame disposed opposite each other, and a third frame and a fourth frame for connecting the first frame and the second frame;
a reflection sheet disposed on a bottom surface of the plastic frame;
a light guide plate disposed on the reflection sheet;
a light source element disposed on an inner side surface of the first frame;
a hole glue adhered to an upper surface of the plastic frame; and
a heat dissipating element disposed on the light source element, extending along an outer side surface of the first frame to a bottom portion of the reflection sheet, and being bonded to the corresponding hole glue on the second frame;
the hole glue comprising a first side portion adhered to the second frame, a second side portion adhered to the third frame, and a third side portion adhered to the fourth frame;
the heat dissipating element comprising a first bonding portion, a second bonding portion and an adhesive portion disposed between the first bonding portion and the second bonding portion;

wherein the adhesive portion is bonded to the reflection sheet through a fixation effect of the first bonding portion and the second bonding portion.

2. The backlight module according to claim 1 , wherein bonding lines are disposed at a boundary between the first bonding portion and the adhesive portion and at a boundary between the second bonding portion and the adhesive portion.

3. The backlight module according to claim 1 , wherein the first bonding portion is bonded to the light source element, and the second bonding portion is bonded to the hole glue corresponding to the second frame.

4. The backlight module according to claim 1 , wherein the heat dissipating element is a graphite sheet or a copper-aluminum foil.

5. A backlight module, comprising:
a plastic frame comprising a first frame and a second frame disposed opposite each other and a third frame and a fourth frame for connecting the first frame and the second frame;
a reflection sheet disposed on a bottom surface of the plastic frame;
a light guide plate disposed on the reflection sheet;
a light source element disposed on an inner side surface of the first frame;
a hole glue adhered to an upper surface of the plastic frame; and
a heat dissipating element disposed on the light source element, extending along an outer side surface of the first frame to a bottom portion of the reflection sheet, and being bonded to the corresponding hole glue on the second frame.

6. The backlight module according to claim 5 , wherein the hole glue comprises a first side portion adhered to the second frame, a second side portion adhered to the third frame, and a third side portion adhered to the fourth frame.

7. The backlight module according to claim 5 , wherein the heat dissipating element comprises a first bonding portion, a second bonding portion and an adhesive portion disposed between the first bonding portion and the second bonding portion, and the adhesive portion is bonded to the reflection sheet through a fixation effect of the first bonding portion and the second bonding portion.

8. The backlight module according to claim 7 , wherein bonding lines are disposed at a boundary between the first bonding portion and the adhesive portion and at a boundary between the second bonding portion and the adhesive portion.

9. The backlight module according to claim 7 , wherein the first bonding portion is bonded to the light source element, and the second bonding portion is bonded to the hole glue corresponding to the second frame.

10. The backlight module according to claim 5 , wherein the heat dissipating element is a graphite sheet or a copper-aluminum foil.

11. A liquid crystal display device including a backlight module and a liquid crystal display panel fixed on the backlight module, the backlight module comprising:
a plastic frame including a first frame and a second frame disposed opposite each other and a third frame and a fourth frame for connecting the first frame and the second frame;
a reflection sheet disposed on a bottom surface of the plastic frame;
a light guide plate disposed on the reflection sheet;
a light source element disposed on an inner side surface of the first frame;
a hole glue adhered to an upper surface of the plastic frame; and
a heat dissipating element disposed on the light source element, extending along an outer side surface of the first frame to a bottom portion of the reflection sheet, and being bonded to the corresponding hole glue on the second frame.

12. The liquid crystal display device according to claim 11 , wherein the hole glue comprises a first side portion adhered to the second frame, a second side portion adhered to the third frame, and a third side portion adhered to the fourth frame.

13. The liquid crystal display device according to claim 11 , wherein the heat dissipating element comprises a first bonding portion, a second bonding portion and an adhesive portion disposed between the first bonding portion and the second bonding portion, and the adhesive portion is bonded to the reflection sheet through a fixation effect of the first bonding portion and the second bonding portion.

14. The liquid crystal display device according to claim 11 , wherein the heat dissipating element is a graphite sheet or a copper-aluminum foil.

15. The liquid crystal display device according to claim 13 , wherein bonding lines are disposed at a boundary between the first bonding portion and the adhesive portion and at a boundary between the second bonding portion and the adhesive portion.

16. The liquid crystal display device according to claim 13 , wherein the first bonding portion is bonded to the light source element, and the second bonding portion is bonded to the hole glue corresponding to the second frame.

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Liu Zhongjie

Classifications

• G02F1/133608 Primary

  including particular frames or supporting means · CPC title

• G02B6/009

  of the light source in the package (G02B6/0021 takes precedence) · CPC title

• G02B6/0088

  of the light guide or other optical sheets in the package · CPC title

• G02B6/0055

  Reflecting element, sheet or layer · CPC title

• G02B6/0085 Primary

  Means for removing heat created by the light source from the package · CPC title