CN201858541U - LED (light-emitting module) backlight module and display equipment with same - Google Patents
LED (light-emitting module) backlight module and display equipment with same Download PDFInfo
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- CN201858541U CN201858541U CN2010202675795U CN201020267579U CN201858541U CN 201858541 U CN201858541 U CN 201858541U CN 2010202675795 U CN2010202675795 U CN 2010202675795U CN 201020267579 U CN201020267579 U CN 201020267579U CN 201858541 U CN201858541 U CN 201858541U
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- led
- adhesive tape
- light
- lgp
- backlit module
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Abstract
The utility model provides an LED (light-emitting module) backlight module and display equipment with same, wherein the LED backlight module comprises a light guide plate and at least one LED light source arranged on one side of the light guide plate, wherein an adhesive tape is arranged between the LED light source and the light guide plate, and the adhesive tape contains diffusate with light diffusion effect. In addition, corrosion or polishing processing can be carried out on the light-emitting surface of the adhesive tape. By the utility model, under the premise that dimension and cost of the LED backlight module are not increased, the Hot Spot phenomenon in the LED backlight module can be effectively overcome, in the LED backlight module with the structure, no air layer exists between the LED light sources and the light guide plate, so the light loss caused by the occurrence of the air layer in the traditional structure can be reduced, and simultaneously, the resources can be saved.
Description
Technical field
The utility model relates to the LED applied technical field, specifically, and the display device that relates to a kind of LED-backlit module and use this LED-backlit module.
Background technology
In recent years, LED (Light Emitting Diode, light emitting diode) pollution-free because of it, color rendering good, advantage such as energy-conservation is widely used in lighting field, under the application of display devices such as LCD TV, laptop computer displays, LED has also replaced CCFL (Cold Cathode FluorescentLamp gradually, the cold cathode fluorescent lamp pipe), become the back light of main flow.But different with CCFL is, for the LED-backlit source of light inlet from the side, the lamp bar that a plurality of LED form is when luminous, because the luminous characteristics of LED self can form dark portion between two LED illuminating sources, and forms speck in the dead ahead of LED illuminating source.This phenomenon is called Hot Spot (focal point) or firefly phenomenon.This phenomenon can cause the edge brightness uniformity of display devices such as LCD TV to reduce, thereby influences the whole image quality.
Represented that as Fig. 1 is simple and easy the schematic diagram of Hot Spot phenomenon appears in a LED-backlit module, as shown in Figure 1, a plurality of LED illuminating sources 1 see through air layer 2 and shine LGP 3, the luminous range of exposures scope as shown by arrows of each LED illuminating source 1 will form HotSpot zone 4 and dark portion zone 5 at the LGP light in part like this.
For this problem, general improvement mode has following several at present:
1, arrange in the site of improving the LGP light in part;
2, under the constant situation of the picture dimension that guarantees display device, delay the firefly phenomenon by the size that adds length/width LGP (light inlet side);
3, when the LGP size constancy, the shell that increases display device is covered up the firefly phenomenon to the extension of picture;
4, reflective adhesive tape of increase or extinction adhesive tape suppress the firefly phenomenon on the LGP exiting surface above the LGP light in part, below the diffusion sheet.
Yet, present technology trends is that the thickness of the various display devices of requirement is more and more thinner, therefore require corresponding module thickness backlight also more and more thinner, especially when the light guide plate of module backlight during less than 1mm, Hot Spot phenomenon has been difficult to 1 solution by the way.Above-mentioned improvement mode 2 delays the firefly phenomenon by the size that increases LGP (light inlet side) length/width, be not only LGP but this mode increases, correspondingly, also need to increase a series of size of devices such as metal backing, reflector plate, prismatic lens, brightening piece, plastic cement frame, metal crimp component and housing, thereby increase the cost of module backlight.3 of improvement modes have directly reduced the picture dimension that the consumer buys, and influence the attractive in appearance of display device.In improvement mode 4, no matter increasing reflective adhesive tape above the LGP light in part still is the extinction adhesive tape, all can reduce the size that the consumer buys picture, increases module thickness backlight.
Do not increase size and cost so the needs design is a kind of, and do not influence the attractive in appearance of display device, but can be good at solving the module backlight of Hot Spot phenomenon.
The utility model content
The utility model proposes at the Hot Spot phenomenon that exists in the LED-backlit module in the prior art, its purpose is to provide a kind of size and cost of not increasing, and do not influence the attractive in appearance of display device, but can solve the LED-backlit module of Hot Spot phenomenon and the display device of using this LED-backlit module well.
The LED-backlit module that the utility model provides comprises LGP and is arranged at least one LED illuminating source of described LGP one side, wherein also be provided with adhesive tape between LED illuminating source and described LGP, described adhesive tape contains the diffusion matter with light diffusion effect.
In addition, preferred construction is, is being provided with reflective adhesive tape on the side away from described LED illuminating source on the one side of described adhesive tape and the described LGP; Be provided with reflector plate in described adhesive tape with the relative another side of described reflective adhesive tape; And described LGP is carried by described reflector plate.
In addition, the utility model also provides another LED-backlit module, comprise LGP and at least one the LED illuminating source that is arranged on described LGP one side, wherein, also be provided with adhesive tape between described LED illuminating source and described LGP, the exiting surface of described adhesive tape is handled through excessive erosion or frosted.
On the other hand, the utility model also provides a kind of display device of LED-backlit module, comprising:
Aforesaid LED-backlit module; And
The diffusion sheet, prismatic lens and the two-way brightening piece that set gradually from inside to outside in a side of LGP bright dipping;
Light from the outgoing of LGP upper surface, form uniform surface light source via diffusion sheet diffusion back, again by prismatic lens with the direction of ray-collecting to outgoing, will be adjusted into the light of the needed polarization direction of polaroid under the liquid crystal panel that meets display device by the light that prismatic lens is collected by having the two two-way brightening pieces that utilize of P, S light again.
In addition, preferred construction is, display device also comprises plastic cement frame, metal bead, metallic support and the chassis of fixing described LED-backlit module and described diffusion sheet, prismatic lens, two-way brightening piece, wherein said metal bead is used for fixing the whole liquid crystal panel of described LED-backlit module, described metal bead and described plastic cement frame are fixed on the described metallic support, and described metallic support is fixed on the chassis.
After adopting above-mentioned technical scheme, can under the prerequisite that does not increase LED-backlit module size and cost, overcome the Hot Spot phenomenon in the existing LED-backlit module effectively, and in the LED-backlit module of this structure, there is not air layer between LED illuminating source and the LGP, reduce in the traditional structure light loss consumption that the existence because of air layer causes, saved the energy simultaneously.
Description of drawings
By below in conjunction with accompanying drawing embodiment being described, above-mentioned feature of the present utility model and technological merit will become apparent and understand easily.
Fig. 1 is the luminous schematic diagram of the LED-backlit module of expression conventional art.
Fig. 2 is the luminous schematic diagram of the utility model embodiment one LED-backlit module;
Fig. 3 is distribution of light figure in the utility model embodiment one LED-backlit module adhesive tape;
Fig. 4 is a kind of concrete structure schematic diagram of the utility model embodiment one LED-backlit module;
Fig. 5 is a concrete structure schematic diagram of using a kind of display device of the utility model embodiment one LED-backlit module;
Fig. 6 is the utility model embodiment two LED-backlit module adhesive tape exiting surface distribution of light figure.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and beneficial effect more cheer and bright, the utility model is done further detailed description below in conjunction with the drawings and specific embodiments.
Embodiment one
Fig. 2 is the luminous schematic diagram of expression the utility model embodiment one LED-backlit module, and Fig. 3 is distribution of light figure in the utility model embodiment one LED-backlit module adhesive tape.
As Fig. 2, shown in Figure 3, the LED-backlit module comprises a plurality of LED illuminating sources 1 and LGP 3, and a plurality of LED illuminating sources 1 are arranged at the side of LGP 3; Between LED illuminating source 1 and LGP 3, be provided with adhesive tape 7, and adhesive tape 7 contains the diffusion matter 8 with light diffusion effect.After entering adhesive tape 7 from the light of LED illuminating source 1 outgoing, a part of light directly sees through adhesive tape 7 and enter LGP 3 after the another side outgoing of adhesive tape 7, enters LGP 3 from the adhesive tape another side again after the diffusion of a part of light through diffusion matter 8 in the adhesive tape 7.
For reaching optimum optical effect, in a preferred implementation of the present utility model, the width that is arranged on the adhesive tape 7 between LED illuminating source 1 and the LGP 3 is generally less than 2mm, and maximum is no more than the width that plastic cement frame (with reference to Fig. 5) that the LED-backlit module installed stretches into picture.In a specific embodiment of the present utility model, adhesive tape 7 selects for use refractive index and LGP refractive index basically identical (being generally refractive index about 1.48), light transmittance in the silica gel more than 90% or other glue classes.
In a specific embodiment of the present utility model, adopt the technology that spreads will spread matter 8 and insert in the adhesive tape 7, and can be according to the diffusion effect of needs adjustment diffusion matter 8 in adhesive tape 7 of specific product.The diffusion effect that diffuses into diffusion matter 8 in the adhesive tape 7 can have at least following three kinds of modes to adjust:
1) adds S in liquid (optical ink or the pure colloid) lining of glue
iO
2Powder.Because S
iO
2Have the light diffusion effect, so S
iO
2Addition is many more, and diffusion effect is obvious more.
At this, the glue viscosity generally about 5000cps, after evenly stirring, by using IR (infrared ray) baking oven, made glue solidify in 30-60 minute 50 ℃-100 ℃ bakings; Perhaps by using the exposure of UV (ultraviolet ray) exposure machine that glue is solidified, using the time of UV exposure machine exposure is about 30 minutes.
Before colloid solidified, the glue viscosity generally about 5000cps, can come if shorten hardening time by the use amount that reduces the solvent of regulating the glue viscosity, and the solvent of regulating the glue viscosity can vapor away in the glue solidification process.
2) under the situation of optical ink components unchanged, increase adhesive tape thickness.Owing to contain S in the optical ink
iO
2Deng the light diffusate, therefore increasing adhesive tape thickness is equivalent to increase S
iO
2Use amount, thus diffusion effect increased.
In addition, for the light that LED illuminating source 1 is sent is obtained diffusion effect preferably by adhesive tape 7 time, in a preferred implementation of the present utility model, diffusion matter 8 is preferably the nanometer of at least a material among SiO2, TiO2, SnO2, CaCO2, Nb2O5, ZnO2, MgF2, CeO2, Al2O3, HfO2, Na3LaF6, the LaF6 to micron powder.
Fig. 4 is a kind of concrete structure schematic diagram of the utility model embodiment one LED-backlit module.As shown in Figure 4, LED illuminating source 1 is installed on the aluminium base 10, adhesive tape 7 is arranged between LED illuminating source 1 and the LGP 3, and the LED illuminating source can utilize aluminium base 10 heat radiations with better radiating effect, and light is injected LGP 3 by adhesive tape 7.Diffuse into diffusion matter 8 in the adhesive tape 7, and the one side of adhesive tape 7 is adhesive with the reflective adhesive tape 13 of one deck, is provided with reflector plate 15 with reflective adhesive tape 13 relative another sides on the adhesive tape 7 with light diffusion effect.And also carry on the reflector plate 15 and adhesive tape 7 tight adjacent LGPs 3, that is to say, reflector plate 15 carries adjacent adhesive tape 7 and LGP 3 simultaneously, thereby be respectively the light cremasteric reflex face of injecting adhesive tape 7 and LGP 3 lower surfaces, with the exitance of increase light, thus the utilization rate of raising light.
In order not increase the thickness of LED-backlit module and display device, and dwindle the vertical lighting angle of LED, make more light be transferred to picture central authorities, the cumulative thickness of adhesive tape 7 and reflective adhesive tape 13 is no more than the thickness of LGP 3.The accumulation direction that vertically is adhesive tape 7 and reflective adhesive tape 13 among Fig. 4.
In addition, reflective adhesive tape 19 also is being installed on away from the side of LED illuminating source 1 on the LGP 3, at work, be reflected sheet 15 and DOT17 of the light that incides LGP 3 lower surfaces reflexes to the upper surface of LGP 3, is transferred to LGP is reflexed to LGP 3 once more by reflective glue 19 bands away from the light on the side of LED illuminating source 1 upper surface; In addition reflective adhesive tape 13 and reflector plate 15 also will reach the upper surface of adhesive tape 7 and lower surface and angle for the first time less than the whole reflected back adhesive tape 7 of the light of the angle of total reflection from the light of LED illuminating source 1 outgoing in adhesive tape 7, and through being transferred in the LGP 3 after the diffusion in the adhesive tape 7.By the synergy of above reflective adhesive tape 13, reflective adhesive tape 19 and reflector plate 15, just the light from 1 outgoing of LED illuminating source all can be conducted, reflexes to the upper surface of LGP 3 by adhesive tape 7 and LGP 7, thereby improved the utilization rate of light.
At last, components such as above-mentioned aluminium base 11, adhesive tape 7, LGP 3 and reflector plate 15 further are fixedly mounted on have just constituted a LED-backlit module as shown in Figure 4 above the metal chassis 16.
In a preferred implementation of the present utility model, reflective adhesive tape 13 and reflective adhesive tape 19 materials can be SiO2, TiO2, SnO2, CaCO2, Nb2O5, ZnO2, MgF2, CeO2, Al2O3, HfO2, Na3LaF6, the nanometer of LaF6TiO2 at least a material wherein is to micron powder or other nanometers to the micro-foaming material of micron order high index of refraction is tied and the binder of high transmission rate, paste on the film substrate by roll extrusion or compound mode and to form, film substrate is generally by PET, PVC, PC, PBT, PE, PP, PMMA, one or more synthetic material constitutes among the ABS.
The above-mentioned LED-backlit module that the utility model provides is provided with the adhesive tape 7 that diffuses into the diffusion matter with light diffusion effect between LED illuminating source 1 and LGP 3, can under the prerequisite that does not increase LED-backlit module size and cost, overcome the Hot Spot phenomenon in the existing LED-backlit module effectively, and in the LED-backlit module of this structure, there is not air layer between LED illuminating source and the LGP, reduce in the traditional structure light loss consumption that the existence because of air layer causes, saved the energy simultaneously.
Fig. 5 is a concrete structure schematic diagram of using a kind of display device of the utility model embodiment one LED-backlit module.As shown in Figure 5, display device comprises plastic cement frame 23, LED-backlit module shown in Fig. 4 is installed in the plastic cement frame 23, aluminium base 10 and reflective adhesive tape 19 are fixing by plastic cement frame 23 as the outer of LED-backlit module, and the side in LGP 3 bright dippings is equipped with diffusion sheet 20 from inside to outside successively, prismatic lens 21 and two-way brightening piece 22, light from the outgoing of LGP upper surface, form uniform surface light source via diffusion sheet 20 diffusion backs, again by prismatic lens 21 with the direction of ray-collecting, again by having P to outgoing, the two two-way brightening pieces 22 that utilize of S light will be adjusted into the light of the needed polarization direction of polaroid under the liquid crystal panel that meets display device by the light that prismatic lens 21 is collected.
Liquid crystal panel in the display device comprises electrode district 25 and the middle effective viewing area 26 that is positioned at periphery, in addition, is provided with the polaroid (not shown) in the upper and lower surface sea of liquid crystal panel.Diffusion sheet 20, prismatic lens 21 and two-way brightening piece 22 are fixing by plastic cement frame 23, and liquid crystal panel is fixed in the plastic cement frame 23, and the width of the electrode district 25 of liquid crystal panel stretches into the width of picture greater than plastic cement frame 23, and greater than the width of adhesive tape 7.Whole liquid crystal panel is fixing by metal bead 27, and metal bead 27 and plastic cement frame 23 are fixed on the metallic support 24, and metallic support 24 is fixed on the chassis 16.
Embodiment two
Fig. 6 is the utility model case study on implementation two LED-backlit module adhesive tape exiting surface distribution of light figure.As shown in Figure 6, similar to embodiment one is, the LED-backlit module comprises a plurality of LED illuminating sources 1 and LGP 3, and a plurality of LED illuminating sources 1 are arranged at the side of LGP 3; Between LED illuminating source 1 and LGP 3, be provided with adhesive tape 7.Different with embodiment one is, does not contain diffusion matter in the adhesive tape 7 in the present embodiment two, does corrosion on the exiting surface 28 of LGP 3 one sides or frosted is handled but close in adhesive tape 7.Rely on this structure, after entering adhesive tape 7 from the light of LED illuminating source 1 outgoing, diffusion can take place in emergent ray when directive exiting surface 28, thereby makes the exiting surface of adhesive tape 7 form the area source of homogeneous, reduce Hot Spot, and then improve the uniformity of the brightness of the light that penetrates LGP.
In addition, the utility model also can be integrated the characteristics of embodiment one and embodiment two, diffusion matter is set in adhesive tape inside, the exiting surface of adhesive tape is done corrosion or frosted simultaneously and handled, under light-source brightness height or less demanding situation, adopt the adhesive tape of exiting surface corrosion or frosted can better solve Hot Spot phenomenon to the picture center brightness.
The LED-backlit module that the utility model provides can be applied to various display devices such as LCD TV, notebook display, can overcome the Hot Spot phenomenon in the display device effectively, and do not increase the size and the production cost of end product, and can improve luminous efficiency, energy savings.
Though described the principle of the present utility model and the specific embodiment at this new LED back light module unit structure and the display device of using this LED-backlit module above; but; those skilled in the art should be understood that; above-mentioned specific descriptions are just better explained the purpose of this utility model; and be not to qualification of the present utility model; under above-mentioned instruction of the present utility model; those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description; and these improvement and distortion; all drop in the protection domain of the present utility model, protection domain of the present utility model is limited by claim and equivalent thereof.
Claims (8)
1. a LED-backlit module comprises LGP and at least one the LED illuminating source that is arranged on described LGP one side, it is characterized in that,
Also be provided with adhesive tape between described LED illuminating source and described LGP, described adhesive tape contains the diffusion matter with light diffusion effect.
2. according to the described LED-backlit module of claim 1, it is characterized in that,
Described adhesive tape is that the refractive index basically identical, light transmittance of refractive index and described LGP is at the silica gel more than 90%.
3. according to the described LED-backlit module of claim 1, it is characterized in that,
Be provided with reflective adhesive tape on the side away from described LED illuminating source on the one side of described adhesive tape and the described LGP;
Be provided with reflector plate in described adhesive tape with the relative another side of described reflective adhesive tape; And
Described LGP is carried by described reflector plate.
4. according to the described LED-backlit module of claim 1, it is characterized in that,
Lower surface at described LGP is provided with the site of light towards the scattering of LGP upper surface.
5. according to the described LED-backlit module of claim 1, it is characterized in that,
Described LED illuminating source is installed on the aluminium base.
6. a LED-backlit module comprises LGP and at least one the LED illuminating source that is arranged on described LGP one side, it is characterized in that,
Also be provided with adhesive tape between described LED illuminating source and described LGP, the exiting surface of described adhesive tape is handled through excessive erosion or frosted.
7. the display device of a LED-backlit module is characterized in that, comprising:
As each described LED-backlit module in the claim 1～6; And
The diffusion sheet, prismatic lens and the two-way brightening piece that set gradually from inside to outside in a side of LGP bright dipping;
Light from the outgoing of LGP upper surface, form uniform surface light source via diffusion sheet diffusion back, again by prismatic lens with the direction of ray-collecting to outgoing, will be adjusted into the light of the needed polarization direction of polaroid under the liquid crystal panel that meets display device by the light that prismatic lens is collected by having the two two-way brightening pieces that utilize of P, S light again.
8. according to the described display device of claim 7, it is characterized in that described display device also comprises:
Plastic cement frame, metal bead, metallic support and the chassis of fixing described LED-backlit module and described diffusion sheet, prismatic lens, two-way brightening piece, wherein said metal bead is used for fixing the whole liquid crystal panel of described LED-backlit module, described metal bead and described plastic cement frame are fixed on the described metallic support, and described metallic support is fixed on the chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202675795U CN201858541U (en) | 2010-07-22 | 2010-07-22 | LED (light-emitting module) backlight module and display equipment with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202675795U CN201858541U (en) | 2010-07-22 | 2010-07-22 | LED (light-emitting module) backlight module and display equipment with same |
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| CN201858541U true CN201858541U (en) | 2011-06-08 |
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| CN2010202675795U Expired - Lifetime CN201858541U (en) | 2010-07-22 | 2010-07-22 | LED (light-emitting module) backlight module and display equipment with same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102338297A (en) * | 2010-07-22 | 2012-02-01 | 歌尔声学股份有限公司 | LED (Light-emitting Diode) backlight module and display equipment with same |
| CN102967892A (en) * | 2011-08-30 | 2013-03-13 | 原相科技股份有限公司 | Reflector and optical touch device using same |
| WO2013033940A1 (en) * | 2011-09-09 | 2013-03-14 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| WO2013075354A1 (en) * | 2011-11-21 | 2013-05-30 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN103376495A (en) * | 2012-04-18 | 2013-10-30 | 昆山康佳电子有限公司 | Light guide plate and backlight module |
| US8614775B2 (en) | 2011-09-09 | 2013-12-24 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and liquid crystal display |
| CN103840069A (en) * | 2012-11-23 | 2014-06-04 | 展晶科技(深圳)有限公司 | LED light emitting device manufacturing method |
| CN103939799A (en) * | 2014-03-31 | 2014-07-23 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
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- 2010-07-22 CN CN2010202675795U patent/CN201858541U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338297A (en) * | 2010-07-22 | 2012-02-01 | 歌尔声学股份有限公司 | LED (Light-emitting Diode) backlight module and display equipment with same |
| CN102967892A (en) * | 2011-08-30 | 2013-03-13 | 原相科技股份有限公司 | Reflector and optical touch device using same |
| US9046963B2 (en) | 2011-08-30 | 2015-06-02 | Pixart Imaging Inc. | Reflective mirror and optical touch device using the same |
| CN102967892B (en) * | 2011-08-30 | 2015-12-02 | 原相科技股份有限公司 | Reflector for optical touch device and optical touch device using same |
| WO2013033940A1 (en) * | 2011-09-09 | 2013-03-14 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| US8614775B2 (en) | 2011-09-09 | 2013-12-24 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and liquid crystal display |
| WO2013075354A1 (en) * | 2011-11-21 | 2013-05-30 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN103376495A (en) * | 2012-04-18 | 2013-10-30 | 昆山康佳电子有限公司 | Light guide plate and backlight module |
| CN103840069A (en) * | 2012-11-23 | 2014-06-04 | 展晶科技(深圳)有限公司 | LED light emitting device manufacturing method |
| CN103939799A (en) * | 2014-03-31 | 2014-07-23 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
| CN103939799B (en) * | 2014-03-31 | 2015-11-25 | 京东方科技集团股份有限公司 | A kind of backlight module and liquid crystal indicator |
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Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |
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Granted publication date: 20110608 |
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