CN202118707U - Backlight module and liquid crystal display device - Google Patents

Abstract

The utility model discloses a backlight module and a liquid crystal display. The backlight module comprises a backlight, a heat dissipation plate and a graphite plate. A heat conduction layer is disposed between the backlight and the heat dissipation plate, the graphite plate is tightly attached to the heat dissipation plate, and the flat surface of the graphite plate is opposite to the backlight. The backlight module can improve efficiency of the heat dissipation plate and effectively reduces junction temperature of LED (light-emitting diode) lights.

Description

Module backlight and liquid crystal indicator

Technical field

The utility model relates to the liquid crystal display product field, relates in particular to a kind of module backlight and liquid crystal indicator with heat sink.

Background technology

At present, along with the LED LCD TV constantly develops towards high definition, high-brightness direction, the power of its LED lamp list lamp is also correspondingly increasing.The unfavorable situation of some that bring thus is, corresponding heat flow density increases, and particularly is in the LED-backlit lamp bar more than the 1.5W for single lamp power, and its requirement for heat abstractor has become more and more for harsh.

Under this background, traditional method is: the heat on the LED-backlit lamp bar is conducted to prefabricated screen aluminium backboard, and do thick and the processing of work blackout through shielding the aluminium backboard, to reduce the temperature of LED-backlit lamp bar.But thickening screen aluminium backboard can make that cost significantly increases.Simultaneously, because heat is limited through the distance of the horizontal outwards conduction of screen aluminium backboard, makes near the significantly resource in screen aluminium backboard axis not to be used effectively and dispel the heat, thereby caused many wastes.On the other hand, the heat of LED-backlit lamp bar conducts to screen aluminium backboard, when the temperature on causing screen aluminium backboard increases, and the environment temperature of power panel and machine core board that can correspondingly raise, thus increased the heat radiation cost of power panel and machine core board heater members.

The utility model content

The main purpose of the utility model is to provide a kind of module backlight and liquid crystal indicator, is intended to improve heat dispersion, reduces the heat radiation cost.

The purpose of the utility model realizes through following technical scheme:

A kind of module backlight comprises backlight and heat sink, and it also comprises graphite cake, is provided with heat-conducting layer between said backlight and the said heat sink, and said graphite cake is close on the said heat sink, and its table plane is relative with backlight.

Preferably; Said heat sink comprises plate-like base plate and protrudes said base plate bottom, the vertically disposed projection of said relatively base plate; Said backlight is adhered on the said projection through heat-conducting glue, and said graphite cake is close to one side relative with backlight on the said base plate.

Preferably, on the said base plate, the another side relative with graphite cake also is provided with the fin that several stretch out this face.

Preferably, said fin is linear array along the length direction of projection and is arranged on the said heat sink.

Preferably, also be provided with several bar shaped capillary radiating parts on the said fin.

A kind of liquid crystal indicator; Comprise back cover, bonnet and module backlight, its said module backlight comprises backlight and heat sink, wherein; Said module backlight also comprises graphite cake; Be provided with heat-conducting layer between said backlight and the said heat sink, said graphite cake is close on the said heat sink, and its table plane is relative with backlight.

Preferably, said back cover is provided with the grooving in order to ccontaining said module backlight.

Preferably, said bonnet is provided with several air-vents.

The heat that the utility model produces backlight (for example high-powered LED lamp) conducts fast gives heat sink; Utilize graphite flake in-plane high thermal conductivity on the heat sink with the fin samming; Effectively utilize the area of dissipation on fin top, improve the efficient of fin, effectively reduce LED lamp junction temperature.Because said back cover is the plastic material structure, the heat that the LED lamp produces is difficult to effectively reduce the bottom surface temperature of power panel and machine core board through the back cover conduction on the other hand; Simultaneously on bonnet, offer several air-vents, bar hole and air-vent are set, thereby can make itself and external environment exchange air-flow better in the part of machine core board; Reduced since upstream flow through the air themperature of fin, thereby reduced the environment temperature of machine core board and power panel, and then reduced power panel and the temperature rise of machine core board device; Final LED lamp, power panel and the machine core board temperature of reducing effectively fast; Improve backlight illumination, prolong the TV life-span, and cost is lower.

Description of drawings

Fig. 1 is the structural representation of the module backlight that provides of the utility model one embodiment;

Fig. 2 is the cooling plate structure sketch map of the module backlight that provides of the utility model one embodiment;

Fig. 3 is the schematic side view of heat sink among Fig. 2;

Fig. 4 is the elevational schematic view of heat sink among Fig. 2;

Fig. 5 is the partial enlarged drawing of A portion among Fig. 4;

Fig. 6 is the back cover structural representation of the liquid crystal indicator that provides of the utility model one embodiment;

Fig. 7 is the rear cover structure sketch map of the liquid crystal indicator that provides of the utility model one embodiment.

The realization of the utility model purpose, functional characteristics and excellent effect will combine specific embodiment and accompanying drawing to do further explanation below.

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment the said technical scheme of the utility model is done further to describe in detail; So that those skilled in the art can better understand the utility model and implementing, but the embodiment that lifts not conduct to the qualification of the utility model.

With reference to Fig. 1, the structural representation of the module backlight that Fig. 1 provides for the utility model one embodiment.Among the utility model embodiment, module 100 backlight comprises backlight 1 (for example LED lamp) and heat sink 2, and it also comprises graphite cake 3.Be provided with the heat-conducting layer (not shown) between backlight 1 and the said heat sink 2, heat-conducting layer can adopt two-sided heat-conducting glue to coat on the Heat Conduction Material and process, and also can adopt the two-sided heat-conducting glue of no base material and processes.When said two-sided heat-conducting glue is coated on the Heat Conduction Material, can all be coated with this two-sided heat-conducting glue on the two sides of said Heat Conduction Material, thereby this backlight 1 is sticked on the heat sink 2.Except that adopting two-sided heat-conducting glue, heat-conducting layer can also be other Heat Conduction Materials, and it is in order to stick to backlight 1 on the heat sink 2.Graphite cake 3 is close on the said heat sink 2, and its table plane is relative with backlight 1.The heat that graphite cake 3 can be given heat sink 2 with backlight 1 conduction is fast along planar diffusion, and the temperature of heat sink 2 various pieces is even, utilizes heat sink 2 top efficiently radiates heat areas thereby increase, thereby improves the radiating efficiency of heat sink 2.

The shape of heat sink 2 has kinds of schemes.As shown in Figures 2 and 3; In a preferred version of the utility model; Heat sink 2 comprises plate-like base plate 22 and protrudes base plate 22 bottoms, relative base plate 22 vertically disposed projections 23; This projection 23 is separated into the upper and lower with base plate 22, and what be positioned at projection 23 belows is the bottom of base plate 22, and what be positioned at projection 23 tops is the top of base plate 22.Backlight 1 adheres on the projection 23 through the two-sided heat-conducting glue of no base material, and graphite cake 3 covers the top of base plate 22, and is relative with backlight 1.On the heat sink 2, also be provided with several fin that stretches out this face 21 with graphite cake 3 relative another sides.During practical implementation, being arranged on the heat sink 2 of fin 21 rules, for example fin 21 is that length direction along projection 23 is linear array and is arranged on the heat sink 2.

More preferably, like Fig. 4 and shown in Figure 5, also be provided with several bar shaped capillary radiating parts 210 on the fin 21.A plurality of capillary radiating parts 210 can be being arranged on the fin 21 of rule, and for example a plurality of capillary radiating parts 210 interval each other equates, is arranged in uniformly on the fin 21.In addition, a plurality of capillary radiating parts 210 also can be irregular being arranged on the fin 21, and its purpose is for increasing the efficiently radiates heat area of this fin 21.A plurality of capillary radiating parts 210 also are set on a plurality of fin 21; Can make significantly increases the area of dissipation of fin 21 in limited space, thereby helps liquid crystal indicator, for example the volume of television set do thinner; Fin 21 can also be made anodization in advance simultaneously; Thereby increase the radiation heat transfer amount, further reduce the temperature rise of backlight 1, fin 21 surface temperatures also will reduce simultaneously; Help reducing the environment temperature of power panel and machine core board, reduce the heat radiation cost of relevant heater members such as power panel and machine core board.

With reference to Fig. 6 and Fig. 7, Fig. 6 is the back cover structural representation of the liquid crystal indicator that provides of the utility model one embodiment; Fig. 7 is the rear cover structure sketch map of the liquid crystal indicator that provides of the utility model one embodiment.In the present embodiment, liquid crystal indicator comprises back cover 400, power panel 200, machine core board 300 and module backlight 100.Wherein, module 100 backlight has comprised whole technical schemes of earlier figures 1 module backlight in embodiment illustrated in fig. 5.Module 100 for example backlight comprises backlight 1, heat sink 2, and graphite cake 3 are provided with heat-conducting layer between backlight 1 and the heat sink 2, and graphite cake 3 contacts and is provided with on it with heat sink 2.The relevant introduction in detail of module 100 backlight sees also preceding text.

In the utility model, liquid crystal indicator refers in particular to the LED TV that has adopted module 100 backlight, in addition, is understood that liquid crystal indicator also comprises the associated electrical product that other have adopted module 100 backlight.Because adopted the technical scheme of earlier figures 1 module backlight in embodiment illustrated in fig. 5, the utility model liquid crystal indicator can improve the efficient of fin, thereby effectively reduces the service life that LED lamp junction temperature prolongs liquid crystal indicator.

In the present embodiment, back cover 400 is provided with the grooving (not shown) in order to ccontaining module 100 backlight, and module backlight 100 is connected on the back cover 400 through jockeys such as screw rods.

Further, back cover 400 is a plastic material, adopts plastic construction to substitute traditional aluminium back board structure.Because the thermal conductivity factor of plastics is very little; The heat that the LED lamp produces is difficult to through this back cover 400 planar conductive; Effectively reduce the bottom surface temperature of power panel 200 and machine core board 300, reduced the heat radiation cost of machine core board 300 and power panel 200, reduced back cover 400 costs simultaneously.

Like Fig. 6 and shown in Figure 7, liquid crystal indicator also comprises the bonnet 500 that is fixedly set on the back cover 400, and bonnet 500 is provided with several air-vents 50, and bonnet 500 can use screw lock on back cover 400.

Continuation is provided with several air-vents 50 with reference to Fig. 7 above the bonnet 500, after cold air gets into from bottom air-vent 50; With fin 21 heat convections; Take away most of heat, and at facial air-vent place 50 with the extraneous air-flow heat-shift that gets into, thereby reduce machine core board 300 and the environment temperature of power panel 200 within the back cover 400; Air-vent 50 flows out the external world to final hot-air from the top, and then takes away the heat of liquid crystal indicator inner heat device.

Further, among the utility model embodiment, also can bar hole and air-vent be set, with better and external environment exchange air-flow at machine core board 300.

Because back cover 400 is plastic material structures, the heat that the LED lamp produces is difficult to effectively reduce the bottom surface temperature of power panel 200 and machine core board 300 through back cover 400 conduction.Simultaneously, owing on bonnet 500, offer several air-vents 50, bar hole and air-vent are set in the part of machine core board 300; Thereby can make itself and external environment exchange air-flow better; Reduced since upstream flow through the air themperature of fin 21, thereby reduced the environment temperature of machine core board 300 and power panel 200, and then reduced power panel 200 and machine core board 300 device temperature rises; Final LED lamp, power panel 200 and machine core board 300 temperature of reducing effectively fast; Improve backlight illumination, prolong the TV life-span, and cost is lower.

The above is merely the preferred embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the utility model.

Claims (10)

1. a module backlight comprises backlight and heat sink, it is characterized in that, also comprises graphite cake, is provided with heat-conducting layer between said backlight and the said heat sink, and said graphite cake is close on the said heat sink, and its table plane is relative with backlight.

2. module backlight as claimed in claim 1; It is characterized in that; Said heat sink comprises plate-like base plate and protrudes said base plate bottom, the vertically disposed projection of said relatively base plate; Said backlight is adhered on the said projection through heat-conducting glue, and said graphite cake is close to one side relative with backlight on the said base plate.

3. module backlight as claimed in claim 2 is characterized in that, on the said base plate, the another side relative with graphite cake also is provided with the fin that several stretch out this face.

4. module backlight as claimed in claim 3 is characterized in that, said fin is linear array along the length direction of projection and is arranged on the said heat sink.

5. like claim 3 or 4 described modules backlight, it is characterized in that, also be provided with several bar shaped capillary radiating parts on the said fin.

6. liquid crystal indicator; Comprise back cover, bonnet and module backlight, its said module backlight comprises backlight and heat sink, it is characterized in that; Said module backlight also comprises graphite cake; Be provided with heat-conducting layer between said backlight and the said heat sink, said graphite cake is close on the said heat sink, and its table plane is relative with backlight.

7. liquid crystal indicator as claimed in claim 6; It is characterized in that; Said heat sink comprises plate-like base plate and protrudes said base plate bottom, the vertically disposed projection of said relatively base plate; Said backlight is adhered on the said projection through heat-conducting glue, and said graphite cake is close to one side relative with backlight on the said base plate.

8. liquid crystal indicator as claimed in claim 7; It is characterized in that; On the said base plate; The another side relative with graphite cake also is provided with the fin that several stretch out this face, and said fin is linear array along the length direction of projection and is arranged on the said heat sink, and also is provided with several bar shaped capillary radiating parts on the said fin.

9. like each described liquid crystal indicator in the claim 6 to 8, it is characterized in that said back cover is provided with the grooving in order to ccontaining said module backlight.

10. liquid crystal indicator as claimed in claim 9 is characterized in that said bonnet is provided with several air-vents.

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