CN203757525U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN203757525U CN203757525U CN201420177122.3U CN201420177122U CN203757525U CN 203757525 U CN203757525 U CN 203757525U CN 201420177122 U CN201420177122 U CN 201420177122U CN 203757525 U CN203757525 U CN 203757525U
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- backlight module
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 229910021389 graphene Inorganic materials 0.000 claims description 13
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 7
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 7
- 238000005229 chemical vapour deposition Methods 0.000 claims description 5
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Abstract
The utility model relates to the technical field of displaying and discloses a backlight module and a display device which are used for improving the light effect of the light outlet face of the backlight module and prolonging the service life of the backlight module to further improve the displaying effect of the display device. The backlight module comprises a back plate with a containing groove, a reflection piece located in the containing groove, a light guide plate located above the reflection piece, a light-emitting diode light bar located on the end face of the light inlet side of the light guide plate and a transparent radiating plate. The transparent radiating plate comprises a base plate located between the reflection piece and the light guide plate and a lateral plate located between the end face of the light inlet side of the light guide plate and the light-emitting diode lamp bar. A radiating layer is arranged on the surface of one side of the transparent radiating plate or on the surfaces of two sides of the transparent radiating plate respectively.
Description
Technical field
The utility model relates to Display Technique field, relates in particular to a kind of backlight module and display unit.
Background technology
At present, the backlight module of liquid crystal indicator, according to the difference of distribution of light sources position, is divided into side entrance back module and down straight aphototropism mode set.As shown in Figure 1, existing side entrance back module comprises: have storage tank backboard 10, be positioned at reflector plate 11, LGP 12 that described storage tank sets gradually from the bottom to top, and be positioned at LED lamp bar (the light-emitting diode of the light inlet side end face of LGP 12, be called for short LED, light emitting diode).When backlight module work, the light that LED13a sends enters LGP 12 from the light inlet side of LGP 12, transmits LGP 12 from the upper surface of LGP 12.
But, luminous the discharged amount of heat of LED makes the heat being subject to of light inlet side of LGP higher, the inequality of being heated of LGP each several part, LGP each several part rising-heat contracting-cold amplitude is different and then cause LGP warpage, make the light efficiency of exiting surface of backlight module poor, for example on exiting surface, there is black and white shadow, thereby make the display effect of display unit poor, especially the LGP of small-medium size backlight module adopts PMMA(PolymethylMethacrylate conventionally, polymethyl methacrylate, be called for short PMMA) when material, its heat conductivility is poor, dispel the heat bad, this problem is particularly evident.
Backlight module adopts following three kinds of heat conduction and heat radiation methods to improve the light efficiency of exiting surface conventionally at present: use the higher LED of luminous efficiency, increase the distance between LED particle, reduce granule number, control heat source, but adopt the method easily to reduce the light efficiency of exiting surface; Adopt the backboard of engraved structure to dispel the heat in time, but the method is taking the heat radiation to streamed as main, radiating effect is poor; Employing is attached at the conductive graphite sheet in backboard outside, heat large area is all loose, LGP is heated evenly, but interval backboard and end reflector plate between conductive graphite sheet and LGP, radiating effect is limited, therefore still has the poor problem of light efficiency of the exiting surface of the backlight module that the inequality of being heated of LGP each several part causes.
Utility model content
The purpose of this utility model is to provide a kind of backlight module and display unit, in order to improve the light efficiency of exiting surface and the service life of prolongation backlight module of backlight module, and then improves the display effect of display unit.
In order to achieve the above object, the utility model provides a kind of backlight module, comprising:
Have the backboard of storage tank, be positioned at the reflector plate of described storage tank, be positioned at the LGP of described reflector plate top, and be positioned at the light-emitting diode light bar of the light inlet side end face of described LGP, described backlight module also comprises:
Transparent heat sink, comprises the base plate between described reflector plate and LGP, and side plate between light inlet side end face and the light-emitting diode light bar of described LGP, and a side surface or the both side surface of described transparent heat sink have heat dissipating layer.
When the backlight module that technical solutions of the utility model provide is worked, be positioned at luminous the given out amount of heat of LED of the light inlet side end face of LGP, because transparent heat sink has good heat conductivility, the amount of heat being gathered between the light inlet side end face of LED and LGP shifts evenly diffusion in time via transparent heat sink, the comparatively uniformity that is heated of LGP each several part, the situation that can effectively prevent LGP warpage occurs, thereby effectively improve the light efficiency of the exiting surface of backlight module, and then improved the display effect of liquid crystal indicator; And, because the each several part of LGP is heated comparatively evenly, the inner thermal stress producing of LGP can be discharged in time, thereby effectively extend the service life of LGP, extend the service life of backlight module.
Preferably, described heat dissipating layer comprises Graphene heat dissipating layer.Because Graphene has, the transmitance of visible ray and infrared light is exceeded to 95%; Thermal conductivity factor is up to 5300W/mK, far above graphite flake (1500W/mK) and diamond (2000W/mK), therefore, the technical program can further improve the heat conductivility of transparent heat sink, thereby the generation of LGP warpage while further effectively preventing backlight module work, improve the light efficiency of exiting surface and the service life of prolongation backlight module of backlight module, and then improve the display effect of display unit.
Preferably, described Graphene heat dissipating layer comprises chemical vapor deposition layer or spool transfer layer.
Preferably, described transparent heat sink comprises glass heat sink, quartzy heat sink, PETG heat sink or polymethyl methacrylate heat sink.
Preferably, described transparent heat sink also comprises: the storage tank extending from described side plate, the top of described light emitting diode is coated in described storage tank.
The storage tank of transparent heat sink contacts with LED heat conduction, luminous LED discharged amount of heat can be transferred to whole transparent heat sink in time, the junction temperature that prevents the chip of LED raises and causes the luminous efficiency of chip and fluorescent material to swash the situation generation of penetrating decrease in efficiency, according to Arrhenius(Arrhenius) rule, 10 DEG C of the every reductions of temperature, the life-span of LED will extend twice, therefore, can effectively extend the service life of LED, and improve the luminous efficiency of LED, thereby further improve the light efficiency of the service life of backlight module and the exiting surface of backlight module.
Preferably, described side plate has the chamfering between the top of described side plate and the exiting surface of described LGP.
The side plate of transparent heat sink has the chamfering between the top of described side plate and the exiting surface of described LGP, the light that can make LED send converges to the light inlet side end face of LGP and enters in LGP, thereby improved the utilization rate of the light that LED sends.
Preferably, this backlight module also comprises: be arranged at the outer surface of described storage tank and the shading rubber belt of described chamfer surface.
The utility model also provides a kind of display unit, comprises the backlight module described in aforementioned arbitrary technical scheme.Because above-mentioned backlight module has above-mentioned technique effect, so the service life of this display unit is longer, and there is good display effect.
Brief description of the drawings
Fig. 1 is the cross-sectional view of existing side entrance back module;
Fig. 2 is the cross-sectional view of the backlight module of the utility model the first embodiment;
Fig. 3 is the cross-sectional view of the transparent heat sink of the backlight module of the utility model the first embodiment;
Fig. 4 is the cross-sectional view of the backlight module of the utility model the second embodiment;
Fig. 5 is the cross-sectional view of the backlight module of the utility model the 3rd embodiment;
Fig. 6 is the cross-sectional view of the transparent heat sink of the backlight module of the utility model the 3rd embodiment.
Reference numeral:
10-backboard 11-reflector plate
12-LGP 13a-LED
The transparent heat sink of 13b-PCB 14-
141-base plate 142-side plate
143-storage tank 144-chamfering
14a-heat dissipating layer
Detailed description of the invention
The object of the utility model embodiment is to provide a kind of backlight module and display unit, in order to improve the light efficiency of exiting surface and the service life of prolongation backlight module of backlight module, and then improves the display effect of display unit.In the backlight module that the utility model embodiment provides, transparent heat sink has good heat conductivility and contacts with LGP heat conduction, the amount of heat being gathered between the light inlet side end face of LED and LGP shifts evenly diffusion in time via transparent heat sink, make the comparatively uniformity that is heated of LGP each several part, the situation that can effectively prevent LGP warpage occurs, thereby effectively improve the light efficiency of the exiting surface of backlight module, and then improved the display effect of liquid crystal indicator; And, because the each several part of LGP is heated comparatively evenly, the inner thermal stress producing of LGP can be discharged in time, thereby effectively extends the service life of LGP and the service life of backlight module.
For making the purpose of this utility model, technical scheme and advantage clearer, by the following examples the utility model is described in further detail.
As shown in Figures 2 and 3, the utility model the first embodiment provide a kind of backlight module, comprising:
There is the backboard 10 of storage tank, be positioned at the reflector plate 11 of storage tank, be positioned at the LGP 12 of reflector plate 11 tops, and be positioned at the LED lamp bar of the light inlet side end face of LGP 12, also comprise:
Transparent heat sink 14, comprises the base plate 141 between reflector plate 11 and LGP 12, and side plate 142 between light inlet side end face and the LED lamp bar of LGP 12, and a side surface or the both side surface of transparent heat sink 14 have heat dissipating layer 14a.
When the backlight module that the present embodiment provides is worked, transparent heat sink 14 has good heat conductivility, LGP 12 contacts with transparent heat sink 14 heat conduction, the LED13a of LED lamp bar contacts with side plate 142 heat conduction of transparent heat sink 14, be positioned at luminous the given out amount of heat of LED13a of the light inlet side end face of LGP 12, shift in time evenly diffusion via transparent heat sink 14, compared to the inequality of being heated of LGP 12 in prior art, the comparatively uniformity that is heated of LGP 12 each several parts in the present embodiment, can effectively prevent that LGP 12 is because of the inequality of being heated, the degree of expanding with heat and contract with cold is different and cause that the situation of LGP 12 warpages occurs, thereby effectively improve the light efficiency of the exiting surface of backlight module, and then the display quality of raising liquid crystal indicator,
And the good heat conductivility of transparent heat sink 14, makes to have reduced in backlight module production process the physical property requirement to LGP 12, thereby effectively reduces the cost of LGP 12, and then reduce the production cost of product;
Further, because the each several part of LGP 12 is heated comparatively even, the inner thermal stress producing of LGP 12 in the utility model embodiment can be discharged in time, thereby effectively extend the service life of LGP 12, and do not need that backlight module is regularly carried out to life-extending experiment and accumulate on the thermal stress of LGP 12 inside to discharge, thereby reduced the production cost of product.
And, while being applied to backlight module due to this transparent heat sink 14, the miscellaneous part in backlight module is not had to special performance requirement (for example physical property and chemical property), for example backboard 10 can adopt metal backing 10, therefore, the utlity model has the potentiality of versatility and practical application.
Transparent heat sink 14 comprises glass heat sink, quartzy heat sink, PET heat sink (Polyethyleneterephthalate, PETG, be called for short PET) or PMMA heat sink, but be not limited to this, because PET has, light transmittance is high, thermal conductivity is good, the advantage of manufacture craft maturation, therefore, transparent heat sink preferably adopts PET heat sink.
The material of heat dissipating layer 14a can be Graphene, but is not limited to this, other materials with high transmission rate and high thermal conductivity also can, can also be for example the transparent high-thermal-conductivity epoxy resin of LED encapsulation use.Graphene is the new material of the individual layer laminated structure that is made up of carbon atom, carbon atom is the flat film of honeycomb lattice with sp2 hybridized orbit composition hexangle type, it is a kind of two-dimensional material of only having a carbon atom thickness, because Graphene has very excellent characteristic, it be the thinnest be in the world the hardest nano material also, and there is superpower mechanical performance, the transmitance of visible ray and infrared light is exceeded to 95%; Thermal conductivity factor is up to 5300W/mK, far above graphite flake (1500W/mK) and diamond (2000W/mK), therefore, in the utility model, the material of heat dissipating layer 14a preferably adopts Graphene, can further improve the heat conductivility of transparent heat sink, thus the generation of LGP warpage while further effectively preventing backlight module work.
In the time that heat dissipating layer 14a is Graphene heat dissipating layer, the preparation method of Graphene heat dissipating layer has multiple, for example, can be vacuum filtration method, spin coating method, injection cladding process, chemical vapour deposition technique or spool transfer method.The uniformity of the single-layer graphene of making due to chemical vapour deposition technique and spool transfer method is higher than 90%, and size can exceed 30 inches, therefore, preferably adopts chemical vapour deposition technique and spool transfer method to make Graphene heat dissipating layer in the utility model.
While work due to backlight module, the luminous amount of heat discharging of LED causes that the junction temperature of the chip of LED raises, cause the thermal stress non-uniform Distribution of chip, the luminous efficiency of chip and fluorescent material are swashed and penetrate decrease in efficiency, in the time that temperature exceedes certain value, the luminous efficiency of LED and life-span are index and successively decrease, thereby the luminous efficiency of LED is reduced, shorten service life, and shorten the service life of backlight module, and the light efficiency of the exiting surface of backlight module reduces.
Therefore, as shown in Figure 4, as the second embodiment of the present utility model, on the basis of the first embodiment, transparent heat sink 14 also comprises: the storage tank 143 extending from side plate 142, the top of LED13a is coated in storage tank 143.
Storage tank 143 is specifically as follows the bending part and the side plate 142 that extend from the top of side plate 142 and forms, and the end of bending part and the PCB(printed substrate of light-emitting diode light bar that extend, Printed CircuitBoard, be called for short PCB) between there is gap, the top that is light emitting diode is placed in storage tank 143, the surface of transparent heat sink 14 coated LED13a, the storage tank of transparent heat sink 14 contacts with LED13a heat conduction, the luminous LED amount of heat discharging can be transferred to whole transparent heat sink 14 in time, the junction temperature that prevents the chip of LED raises and causes the luminous efficiency of chip and fluorescent material to swash the situation generation of penetrating decrease in efficiency, according to Arrhenius(Arrhenius) rule, 10 DEG C of the every reductions of temperature, the life-span of LED will extend twice, therefore, can effectively extend the service life of LED, and improve the luminous efficiency of LED, thereby further improve the light efficiency of the service life of backlight module and the exiting surface of backlight module,
Meanwhile, transparent heat sink 14 is only coated on the surface of LED13a, and does not contact with the printed substrate PCB13b of LED lamp bar, has effectively prevented the impact of the electric property of transparent heat sink 14 on LED lamp bar.
Along with the slimming of backlight module, the thickness of LGP is more and more thinner, the thickness of LGP even reaches 0.2mm, the height of LED is due to the restriction of himself structure, slimming degree is limited, in the light that LED sends, higher than cannot entering LGP, the part of LGP cause the utilization rate of the light that LED sends to reduce, therefore, in order effectively to improve the utilization rate of the light that LED sends, as shown in Figure 5 and Figure 6, in preferred the 3rd embodiment of the utility model, side plate 142 has the chamfering 144 between the top of side plate 142 and the exiting surface of LGP 12.
While adopting transparent heat sink 14 to dispel the heat, after backlight module has been assembled, due to the thickness of transparent heat sink 14 self, likely make the gap between the tip position of LED13a and the exiting surface position of LGP 12 increase, side plate 142 has the chamfering 144 between the top of side plate 142 and the exiting surface of LGP 12, the base that is chamfering 144 is concordant with the exiting surface of LGP 12, the light that can make LED send converges to the light inlet side end face of LGP and enters in LGP, thereby improved the utilization rate of the light that LED sends.
Shown in Fig. 5, preferred as the utility model, backlight module also comprises and is arranged at the outer surface of storage tank 143 and the surperficial shading rubber belt (not shown) of chamfering 144, shading rubber belt makes the light that LED13a sends enter LGP 12 from the light inlet side end face of LGP 12 as much as possible, effectively improve the utilization rate of the light that LED sends, and then improved the light efficiency of the exiting surface of backlight module.
Based on the backlight module providing in above-described embodiment, the utility model also provides a kind of display unit, comprises the backlight module that above-described embodiment provides.Because above-mentioned backlight module has above-mentioned technique effect, so the service life of this display unit is longer, and there is good display effect.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if these amendments of the present utility model and within modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (8)
1. a backlight module, comprising: have the backboard of storage tank, be positioned at the reflector plate of described storage tank, be positioned at the LGP of described reflector plate top, and be positioned at the light-emitting diode light bar of the light inlet side end face of described LGP, it is characterized in that, also comprise:
Transparent heat sink, comprises the base plate between described reflector plate and LGP, and side plate between light inlet side end face and the light-emitting diode light bar of described LGP, and a side surface or the both side surface of described transparent heat sink have heat dissipating layer.
2. backlight module as claimed in claim 1, described heat dissipating layer comprises Graphene heat dissipating layer.
3. backlight module as claimed in claim 2, is characterized in that, described Graphene heat dissipating layer comprises chemical vapor deposition layer or spool transfer layer.
4. backlight module as claimed in claim 1, is characterized in that, described transparent heat sink comprises glass heat sink, quartzy heat sink, PETG heat sink or polymethyl methacrylate heat sink.
5. the backlight module as described in as arbitrary in claim 1～4, is characterized in that, described transparent heat sink also comprises: the storage tank extending from described side plate, the top of described light emitting diode is coated in described storage tank.
6. backlight module as claimed in claim 5, is characterized in that, described side plate has the chamfering between the top of described side plate and the exiting surface of described LGP.
7. backlight module as claimed in claim 6, is characterized in that, also comprises: be arranged at the outer surface of described storage tank and the shading rubber belt of described chamfer surface.
8. a display unit, is characterized in that, comprises the backlight module as described in as arbitrary in claim 1～7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177122.3U CN203757525U (en) | 2014-04-11 | 2014-04-11 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177122.3U CN203757525U (en) | 2014-04-11 | 2014-04-11 | Backlight module and display device |
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| CN201420177122.3U Expired - Fee Related CN203757525U (en) | 2014-04-11 | 2014-04-11 | Backlight module and display device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515041A (en) * | 2014-12-15 | 2015-04-15 | 深圳市华星光电技术有限公司 | Backlight module structure |
| CN104676449A (en) * | 2014-12-31 | 2015-06-03 | 苏州通尔泰新材料科技有限公司 | LED (light emitting diode) light shading film with convex groove structure |
| CN105739182A (en) * | 2016-04-27 | 2016-07-06 | 合肥惠科金扬科技有限公司 | Heat radiating structure of display device and display device |
| CN105842920A (en) * | 2016-04-29 | 2016-08-10 | 佛山市南海区联合广东新光源产业创新中心 | LED backlight module |
| CN106090837A (en) * | 2016-07-27 | 2016-11-09 | 深圳天珑无线科技有限公司 | A kind of backlight module and display screen |
| WO2017084425A1 (en) * | 2015-11-19 | 2017-05-26 | 合一智能科技（深圳）有限公司 | Display module and manufacturing method therefor |
| CN109283611A (en) * | 2018-10-22 | 2019-01-29 | 东莞市银泰丰光学科技有限公司 | A kind of guide-lighting mould group and preparation method thereof using ITO conduction |
| CN109817674A (en) * | 2019-01-30 | 2019-05-28 | 武汉华星光电半导体显示技术有限公司 | A kind of backboard and its display panel |
| CN109975900A (en) * | 2017-12-27 | 2019-07-05 | 宁波长阳科技股份有限公司 | A kind of reflectance coating and the preparation method and application thereof with heat conducting coating |
| CN111045251A (en) * | 2019-12-19 | 2020-04-21 | 武汉华星光电技术有限公司 | Side-in backlight structure and display device |
| CN112557396A (en) * | 2020-12-23 | 2021-03-26 | 东软睿驰汽车技术（沈阳）有限公司 | Detection method and related equipment |
| CN113203062A (en) * | 2021-05-20 | 2021-08-03 | 宁波公牛生活电器有限公司 | Lighting device and bathroom heater |
| CN114397782A (en) * | 2021-12-31 | 2022-04-26 | 惠科股份有限公司 | Backlight module, forming method thereof and display device |
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- 2014-04-11 CN CN201420177122.3U patent/CN203757525U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515041A (en) * | 2014-12-15 | 2015-04-15 | 深圳市华星光电技术有限公司 | Backlight module structure |
| CN104676449A (en) * | 2014-12-31 | 2015-06-03 | 苏州通尔泰新材料科技有限公司 | LED (light emitting diode) light shading film with convex groove structure |
| WO2017084425A1 (en) * | 2015-11-19 | 2017-05-26 | 合一智能科技（深圳）有限公司 | Display module and manufacturing method therefor |
| CN105739182A (en) * | 2016-04-27 | 2016-07-06 | 合肥惠科金扬科技有限公司 | Heat radiating structure of display device and display device |
| CN105842920A (en) * | 2016-04-29 | 2016-08-10 | 佛山市南海区联合广东新光源产业创新中心 | LED backlight module |
| CN106090837A (en) * | 2016-07-27 | 2016-11-09 | 深圳天珑无线科技有限公司 | A kind of backlight module and display screen |
| CN109975900A (en) * | 2017-12-27 | 2019-07-05 | 宁波长阳科技股份有限公司 | A kind of reflectance coating and the preparation method and application thereof with heat conducting coating |
| CN109975900B (en) * | 2017-12-27 | 2021-07-06 | 宁波长阳科技股份有限公司 | Reflecting film with heat-conducting coating and preparation method and application thereof |
| CN109283611A (en) * | 2018-10-22 | 2019-01-29 | 东莞市银泰丰光学科技有限公司 | A kind of guide-lighting mould group and preparation method thereof using ITO conduction |
| CN109283611B (en) * | 2018-10-22 | 2021-02-23 | 东莞市银泰丰光学科技有限公司 | Light guide module conducting electricity by using Indium Tin Oxide (ITO) and preparation method thereof |
| CN109817674A (en) * | 2019-01-30 | 2019-05-28 | 武汉华星光电半导体显示技术有限公司 | A kind of backboard and its display panel |
| US11056671B2 (en) | 2019-01-30 | 2021-07-06 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Backplate having graphene layer on polyethylene terephthalate layer and flexible display panel thereof |
| CN111045251A (en) * | 2019-12-19 | 2020-04-21 | 武汉华星光电技术有限公司 | Side-in backlight structure and display device |
| CN112557396A (en) * | 2020-12-23 | 2021-03-26 | 东软睿驰汽车技术（沈阳）有限公司 | Detection method and related equipment |
| CN113203062A (en) * | 2021-05-20 | 2021-08-03 | 宁波公牛生活电器有限公司 | Lighting device and bathroom heater |
| CN114397782A (en) * | 2021-12-31 | 2022-04-26 | 惠科股份有限公司 | Backlight module, forming method thereof and display device |
| US11809043B2 (en) | 2021-12-31 | 2023-11-07 | HKC Corporation Limited | Backlight module, forming method thereof, and display device |
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