Backlight module and display device

Patent metadata

Field	Value
Publication number	US-9594208-B2
Application number	US-201514431000-A
Country	US
Kind code	B2
Filing date	Jan 16, 2015
Priority date	Dec 24, 2014
Publication date	Mar 14, 2017
Grant date	Mar 14, 2017

Abstract

A backlight module includes a mold frame, a light guide plate, a light bar light source, and an optic film. The light guide plate, the light source, and the optic film are disposed in the mold frame. The light source is arranged between the light guide plate and the mold frame. The optic film and the light guide plate are stacked on each other. The backlight module includes a heat dissipation frame that includes first, second, and third heat dissipation walls. The third heat dissipation wall is opposite to the first heat dissipation wall and the second heat dissipation wall is connected to the first and third heat dissipation walls. An end of the mold frame at which the light source is arranged is received between the first and third heat dissipation walls and the mold frame is in tight engagement with the second heat dissipation wall.

First claim

What is claimed is:

1. A backlight module, comprising a mold frame, a light guide plate, a light bar light source, and an optic film, the light guide plate, the light source, and the optic film being disposed in the mold frame, the light source being arranged between a light incidence side of the light guide plate and the mold frame, the optic film and the light guide plate being arranged to stack on each other, wherein the backlight module further comprises a heat dissipation frame, the heat dissipation frame comprising a first heat dissipation wall, a second heat dissipation wall, and a third heat dissipation wall that is opposite to the first heat dissipation wall, the second heat dissipation wall being connected to the first heat dissipation wall and the third heat dissipation wall, an end of the mold frame at which the light source is arranged being received between the first heat dissipation wall and the third heat dissipation wall in such a way that the mold frame is in tight engagement with the second heat dissipation wall;
wherein the light source comprises a light source circuit board, the light source circuit board and the mold frame being fixed together by a double-sided adhesive tape; and
wherein the first heat dissipation wall is fixed to the mold frame and the light source circuit board by the double-sided adhesive tape and the double-sided adhesive tape extends to an edge portion of a surface of the optic film.

2. The backlight module as claimed in claim 1 , wherein the third heat dissipation wall is located at an end of the light source that is distant from the first heat dissipation wall and supports the mold frame and the light incidence side of the light guide plate.

3. The backlight module as claimed in claim 2 , wherein a reflector plate is included between the light guide plate and the third heat dissipation wall.

4. The backlight module as claimed in claim 1 , wherein the double-sided adhesive tape is made of a thermally conductive material.

5. A display device, comprising a backlight module and a liquid crystal panel, the backlight module comprising a mold frame, a light guide plate, a light bar light source, and an optic film, the light guide plate, the light source, and the optic film being disposed in the mold frame, the light source being arranged between a light incidence side of the light guide plate and the mold frame, the optic film and the light guide plate being arranged to stack on each other, wherein the backlight module further comprises a heat dissipation frame, the heat dissipation frame comprising a first heat dissipation wall, a second heat dissipation wall, and a third heat dissipation wall that is opposite to the first heat dissipation wall, the second heat dissipation wall being connected to the first heat dissipation wall and the third heat dissipation wall, an end of the mold frame at which the light source is arranged being received between the first heat dissipation wall and the third heat dissipation wall in such a way that the mold frame is in tight engagement with the second heat dissipation wall; and the liquid crystal panel is disposed on the backlight module and the liquid crystal panel is fixed to the first heat dissipation wall and the optic film;
wherein the light source comprises a light source circuit board, the light source circuit board and the mold frame being fixed together by a double-sided adhesive tape, the first heat dissipation wall being fixed to the mold frame and the light source circuit board by the double-sided adhesive tape, the double-sided adhesive tape extending to an edge portion of a surface of the optic film.

6. The display device as claimed in claim 5 , wherein the liquid crystal panel comprises a lower polarizer, a first glass layer, a second glass layer, and an upper polarizer, the lower polarizer, the first glass layer, the second glass layer, and the upper polarizer being sequentially stacked, the first glass layer being located on the lower polarizer, the lower polarizer and the optic film being fixed to each other by the double-sided adhesive tape that extends to the optic film.

7. The display device as claimed in claim 6 , wherein the display device further comprises a flexible circuit board and a chip, the first glass layer comprising an extension section, the flexible circuit board and the chip being mounted on the extension section, the extension section being disposed on the first heat dissipation wall of the heat dissipation frame.

8. The display device as claimed in claim 6 , wherein the light source comprises a light source circuit board, the light source circuit board and the mold frame being fixed together by a double-sided adhesive tape.

9. The display device as claimed in claim 8 , wherein the first heat dissipation wall is fixed to the mold frame and the light source circuit board by the double-sided adhesive tape and the double-sided adhesive tape extends to an edge portion of a surface of the optic film.

10. The display device as claimed in claim 9 , wherein the third heat dissipation wall is located at an end of the light source that is distant from the first heat dissipation wall and supports the mold frame and the light incidence side of the light guide plate.

11. The display device as claimed in claim 10 , wherein a reflector plate is included between the light guide plate and the third heat dissipation wall.

12. The display device as claimed in claim 11 , wherein the double-sided adhesive tape is made of a thermally conductive material.

Assignees

• Shenzhen China Star Optoelect
• Shenzhen China Star Optoelect

Inventors

• Zhou Gege

Classifications

• G02F2001/133302

  Physics · mapped topic

• G02F1/133528

  Polarisers · CPC title

• G02B6/005

  provided by one optical element, or plurality thereof, placed on the light output side of the light guide · CPC title

• G02F1/133615

  Edge-illuminating devices, i.e. illuminating from the side · CPC title

• G02B6/0091

  of the light source relative to the light guide (G02B6/0021 takes precedence) · CPC title