CN212276186U

CN212276186U - Backlight module and display device

Info

Publication number: CN212276186U
Application number: CN202021372383.2U
Authority: CN
Inventors: 单晓东; 魏鑫; 温文涛
Original assignee: Shenzhen Titans Technology Co ltd
Current assignee: Shenzhen Titans Technology Co ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2021-01-01
Anticipated expiration: 2030-07-13

Abstract

The utility model relates to a backlight module and display device, it still includes heat abstractor including being located gluey frame and adhesion in the reflector layer of gluey frame bottom, light guide plate, diffusion barrier and the membrane that adds lustre to and butt that the orientation of keeping away from the reflector layer set gradually in gluey frame and in the sidelight source of light guide plate side, heat abstractor includes the heat-conducting plate, a plurality of heat dissipation strips of pasting that set up in the reflective membrane bottom surface side by side, the relative both sides of heat-conducting plate butt respectively in sidelight source and gluey frame inside wall, the one end of heat dissipation strip of pasting links in the heat-conducting plate, and is adjacent the heat dissipation strip of pasting passes the clearance between reflector layer and the gluey frame and keeps away from each other in the orientation of. The backlight module has the effect of improving the heat dissipation effect of the backlight module with the rubber frame.

Description

Backlight module and display device

Technical Field

The application relates to the field of illumination, especially, relate to a backlight unit and display device.

Background

Currently, the backlight module in the market is generally composed of an outer frame, a light guide plate and various films in the frame, and an LED side light source arranged on one side of the light guide plate. The LED side light source is formed by arranging densely arranged lamp beads, and can generate a large amount of heat under long-term work. The iron frame has better heat-conducting property, but compared with the iron frame, the rubber frame easily accumulates a large amount of heat in the backlight module due to the material characteristics of the rubber frame, under the condition that the LED side light source works for a long time, so that the backlight module has the phenomenon of local overheating, a member adopting the backlight module can be damaged to a certain extent, and the display effect and the service life of the liquid crystal display device are influenced.

SUMMERY OF THE UTILITY MODEL

In order to improve the heat dissipation effect of the backlight module with the rubber frame, the application provides a backlight module and a display device.

In a first aspect, the present application provides a backlight module, which adopts the following technical solution:

the utility model provides a backlight module, is including gluing the frame and adhesion in the reflection stratum of gluing the frame bottom, still including being located the light guide plate that glues the frame and set gradually in the direction of keeping away from the reflection stratum, diffusion barrier and the membrane that adds lustre to and butt in the sidelight source of light guide plate side, still includes heat abstractor, heat abstractor includes the heat-conducting plate, a plurality of sets up side by side in the heat dissipation strip of pasting of reflection stratum bottom surface, the relative both sides of heat-conducting plate butt respectively in sidelight source and gluey frame inside wall, the one end of heat dissipation strip is even in the heat-conducting plate, and is adjacent the heat dissipation strip of pasting passes the clearance between reflection stratum and the gluey frame and keeps away from.

Through adopting above-mentioned technical scheme, the heat-conducting plate sets up between the inside wall of sidelight source and gluey frame for absorb the heat that the sidelight source produced, the heat of heat dissipation welt absorption heat-conducting plate spreads the bottom surface of reflection stratum, and the bottom surface of reflection stratum links to each other with backlight unit's outside, makes the heat dissipation welt have better radiating effect.

Preferably, the medial surface and the lateral surface of gluing the frame link to each other through a plurality of screw hole, heat abstractor still includes from the lateral surface of gluing the frame and penetrate in the screw hole and the butt heat dissipation pole on the heat dissipation paster.

Through adopting above-mentioned technical scheme, the heat dissipation pole can absorb the heat on the conducting strip to play the radiating effect. The length of the radiator bar is set by people according to needs, and the longer the radiator bar is, the larger the radiating area is, and the better the effect of radiating heat absorbed from the heat conducting plate is.

Preferably, the heat dissipation device further comprises a heat dissipation lantern ring surrounding the outer side face of the rubber frame, and the heat dissipation lantern ring is abutted to the heat dissipation rod.

Through adopting above-mentioned technical scheme, the heat of heat dissipation pole can be absorbed to the heat dissipation lantern ring, and the heat dissipation lantern ring surrounds the lateral surface at gluey frame, has great surface area, and the heat dissipation glues the frame and keeps away from one side temperature of the sidelight source of heat dissipation pole relatively lower, and the radiating effect is better.

Preferably, one end of the heat dissipation strip, which is far away from the side light source, extends along the direction of the temperature gradient, and one end of the heat dissipation strip, which is far away from the side light source, is connected to the heat dissipation lantern ring.

The side light sources are usually LED light bars of limited length, and this structure determines that the heat distribution around the side light sources is uneven, usually presenting a high middle and low sides, so the temperature gradient of the heat around the side light sources is usually spread to both ends of the side light sources in a direction away from the side light sources. Through adopting above-mentioned technical scheme, the heat dissipation welt extends along temperature gradient direction, rather than evenly parallel arrangement, can be effectively with the heat dissipation welt from the heat-conducting plate absorbed heat towards everywhere diffusion. Meanwhile, the temperature of one side of the radiating rubber frame, which is far away from the side light source of the radiating rod, is relatively low, and the radiating effect is good.

Preferably, the heat conducting plate is a metal plate, and the heat radiating lantern ring is a metal ring.

Through adopting above-mentioned technical scheme, the metal has more good heat conductivility in being used for making the heat dissipation lantern ring of gluey frame, can accelerate the radiating effect of heat-conducting plate and heat dissipation lantern ring.

Preferably, the heat conducting plate is an aluminum sheet, and the heat radiating lantern ring is an aluminum ring.

Through adopting above-mentioned technical scheme, the aluminium material has good heat conductivity, only next to copper material and silver material, and the heat-conducting plate that the aluminum product was made can absorb the produced heat of sidelight source fast to transmit on heat dissipation furring strip and the heat dissipation lantern ring.

Preferably, a heat conducting glue is filled between the side light source and the heat conducting plate.

By adopting the technical scheme, as the side light source is provided with more electronic elements, the contact surface of the side light source and the heat conducting plate is in an uneven state, so that the side light source and the heat conducting plate are difficult to be tightly attached, and certain air can exist in a gap between the side light source and the heat conducting plate. The function of heat dissipation glue is to pack these gaps and exhaust air, compares with the air, and heat dissipation glue has higher heat conductivility, can strengthen the heat transfer efficiency between the sidelight source to the heat-conducting plate.

In a second aspect, the present application provides a display device, which adopts the following technical solutions:

a display device comprises the backlight module and a liquid crystal screen arranged on the backlight module.

Drawings

FIG. 1 is a first schematic view of a display device according to an embodiment of the present disclosure;

FIG. 2 is a second overall schematic diagram of a display device according to an embodiment of the present disclosure;

fig. 3 is an exploded view of a display device according to an embodiment of the present application;

fig. 4 is a partial sectional view of a display device in an embodiment of the present application.

Description of reference numerals:

1. a backlight module; 11. a rubber frame; 12. a reflective layer; 13. a light guide plate; 14. a diffusion membrane; 15. a brightness enhancement film; 16. a side light source;

17. a heat sink; 171. a heat conducting plate; 172. a heat dissipation sticker; 173. a heat dissipation rod; 174. a heat dissipation collar;

18. a threaded hole;

2. and a liquid crystal screen.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a display device, referring to fig. 1, the display device includes a backlight module 1 for providing backlight, and a liquid crystal screen 2 arranged on the backlight module 1 and used for controlling the light output of the backlight module 1.

Referring to fig. 2 and 3, the backlight module 1 includes a rubber frame 11, a side light source 16 disposed on the rubber frame 11, and a heat dissipation device 17 for accelerating the dissipation of heat generated by the side light source 16, and further includes a reflective layer 12, a light guide plate 13, a diffusion film 14, and a brightness enhancement film 15 disposed in the rubber frame 11, in this embodiment, the rubber frame 11 is a square frame body and made of a plastic material. The reflective layer 12 is adhered to the bottom of the plastic frame 11, and forms a chamber for accommodating the light guide plate 13, the diffusion film 14 and the brightness enhancement film 15 with the plastic frame 11, in the embodiment, the reflective layer 12 is a sheet body with a top surface matched with the outer contour of the bottom surface of the frame body, and four edges of the top surface of the reflective layer are adhered with a double-sided adhesive tape for connecting with the plastic frame 11. The light guide plate 13, the diffusion film 14, and the brightness enhancement film 15 are disposed in this order in a direction away from the reflection layer 12. The side light sources 16 abut against a side surface of the light guide plate 13, and in the present embodiment, the side light sources 16 are LED light bars, and the light emitting direction faces the inside of the light guide plate 13.

Referring to fig. 3 and 4, the heat sink 17 includes a heat conducting plate 171 and a plurality of heat dissipating strips 172 disposed side by side on the bottom surface of the reflective film. The heat conducting plate 171 is a square strip metal plate, and two opposite sides thereof are respectively abutted against the side light source 16 and the inner side wall of the rubber frame 11. One end of the heat dissipation strip 172 is connected to the heat conductive plate 171, and the adjacent heat dissipation strips 172 pass through the gap between the reflective layer 12 and the adhesive frame 11 and are away from each other in a direction away from the heat conductive plate 171, and in this embodiment, referring to fig. 2, the end of the heat dissipation strip 172 away from the side light source 16 extends in a temperature gradient direction. Since the side light sources 16 are typically LED light bars of finite length, this configuration determines that the heat distribution around the side light sources 16 is non-uniform, typically appearing high in the middle and low on both sides, and therefore the temperature gradient profile of the heat around the side light sources 16 is typically spread in a direction away from the side light sources 16 towards both ends of the side light sources 16. Therefore, the heat dissipation strips 172 extend in the direction of the temperature gradient, rather than being uniformly arranged in parallel, and the heat absorbed by the heat dissipation strips 172 from the heat conductive plate 171 can be effectively diffused everywhere. The heat conducting plate 171 and the heat dissipating attachment strip 172 may be made of metal materials such as stainless steel, copper, aluminum, etc., in this embodiment, the heat conducting plate 171 and the heat dissipating attachment strip 172 are both aluminum sheets, and the aluminum material has good thermal conductivity, and next to the copper material and the silver material, the heat conducting plate 171 made of the aluminum material can rapidly absorb the heat generated by the side light source 16 and transmit the heat to the heat dissipating attachment strip 172.

In addition, the heat conducting glue is filled between the side light source 16 and the heat conducting plate 171, and the contact surface between the side light source 16 and the heat conducting plate 171 is uneven due to the large number of electronic elements on the side light source 16, so that the side light source 16 and the heat conducting plate 171 are difficult to be tightly attached, and a certain amount of air exists in the gap between the side light source 16 and the heat conducting plate 171. The heat dissipation paste fills the gaps and discharges air, and has a higher heat conduction capability than air, so that the heat transfer efficiency between the side light source 16 and the heat conduction plate 171 can be enhanced.

Referring to fig. 4, the inner side surface and the outer side surface of the rubber frame 11 are connected through a plurality of threaded holes 18, the heat dissipation device 17 further includes a heat dissipation rod 173 penetrating into the threaded hole 18 from the outer side surface of the rubber frame 11 and abutting against the heat dissipation attachment strip 172, and a heat dissipation collar 174 surrounding the outer side surface of the rubber frame 11, and the heat dissipation collar 174 abuts against the heat dissipation rod 173. The heat dissipation collar 174 can absorb heat of the heat dissipation rod 173, and the heat dissipation collar 174 surrounds the outer side surface of the rubber frame 11, so that the surface area is large, and the temperature of the side of the heat dissipation rubber frame 11 away from the side light source 16 of the heat dissipation rod 173 is relatively low, so that the heat dissipation effect is good. The end of the heat dissipation strip 172 away from the side light source 16 is connected to the heat dissipation collar 174, and the side of the heat dissipation rubber frame 11 away from the side light source 16 of the heat dissipation rod 173 has a relatively low temperature, so that the heat dissipation effect is good. The heat dissipating collar 174 may be made of a metal material such as stainless steel, copper, aluminum, etc., and in this embodiment, the heat dissipating collar 174 is an aluminum ring.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A backlight module (1) comprises a rubber frame (11), a reflecting layer (12) adhered to the bottom of the rubber frame (11), a light guide plate (13), a diffusion film (14), a brightness enhancement film (15) and a side light source (16) abutted to the side face of the light guide plate (13), wherein the light guide plate (13), the diffusion film (14) and the brightness enhancement film (15) are sequentially arranged in the rubber frame (11) in the direction away from the reflecting layer (12), it is characterized by also comprising a heat dissipation device (17), wherein the heat dissipation device (17) comprises a heat conduction plate (171) and a plurality of heat dissipation adhesive strips (172) which are arranged on the bottom surface of the reflective film side by side, the two opposite sides of the heat conducting plate (171) are respectively abutted against the side light source (16) and the inner side wall of the rubber frame (11), one end of each heat dissipation strip (172) is connected with the heat conducting plate (171), and the adjacent heat dissipation strips (172) penetrate through the gap between the reflecting layer (12) and the rubber frame (11) and are far away from each other in the direction far away from the heat conducting plate (171).

2. The backlight module as claimed in claim 1, wherein the inner side and the outer side of the rubber frame (11) are connected by a plurality of threaded holes (18), and the heat sink (17) further comprises heat dissipation rods (173) penetrating into the threaded holes (18) from the outer side of the rubber frame (11) and abutting against the heat dissipation strips (172).

3. The backlight module as claimed in claim 2, wherein the heat sink (17) further comprises a heat dissipating collar (174) surrounding the outer side of the frame (11), the heat dissipating collar (174) abuts against the heat dissipating rod (173).

4. The backlight module according to claim 3, wherein the end of the heat dissipation strip (172) away from the side light source (16) extends along the direction of the temperature gradient, and the end of the heat dissipation strip (172) away from the side light source (16) is connected to the heat dissipation collar (174).

5. The backlight module according to claim 4, wherein the heat conductive plate (171) is a metal plate, and the heat dissipating collar (174) is a metal ring.

6. The backlight module according to claim 5, wherein the heat conductive plate (171) is an aluminum sheet, and the heat dissipating collar (174) is an aluminum ring.

7. The backlight module according to claim 1, wherein a thermal conductive glue is filled between the side light source (16) and the thermal conductive plate (171).

8. A display device, comprising the backlight module (1) as claimed in any one of claims 1 to 7, and further comprising a liquid crystal screen (2) disposed on the backlight module (1).