CN101684921A - Light mixing film for mixing light from light emitting diode backlight source and light emitting diode backlight source - Google Patents
Light mixing film for mixing light from light emitting diode backlight source and light emitting diode backlight source Download PDFInfo
- Publication number
- CN101684921A CN101684921A CN200810222972A CN200810222972A CN101684921A CN 101684921 A CN101684921 A CN 101684921A CN 200810222972 A CN200810222972 A CN 200810222972A CN 200810222972 A CN200810222972 A CN 200810222972A CN 101684921 A CN101684921 A CN 101684921A
- Authority
- CN
- China
- Prior art keywords
- led
- light
- mixing film
- substrate
- mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Planar Illumination Modules (AREA)
Abstract
The invention relates to a light mixing film for mixing light from a light emitting diode (LED) backlight source and an LED backlight source. The light mixing film comprises a substrate and mesh points arranged on the substrate, wherein the substrate is manufactured by a light-transparent material; and the mesh points are used for scattering light. The LED backlight source comprises the light mixing film, wherein the light mixing film is arranged between an LED and a diffusing sheet; and the mesh points on the light mixing film are at least arranged on the substrate right above the LED. Through the light mixing film, stronger light rays emitted by the LED can be partially transmitted and partially reflected back to the bottom reflecting film, thereby reducing the production of bright spots; and thus, light rays can be evenly mixed within a shorter distance, thereby reducing the light mixing distance of the direct LED backlight source and meeting the ultra-thin requirement for the direct LED backlight source.
Description
Technical field
The present invention relates to technical field of liquid crystal display, relate in particular to and a kind ofly can reduce mixing film and LED-backlit source light mixing distance, that be used for light emitting diode (LED) backlight mixed light.
Background technology
At present, many advantages such as LED-backlit relies on no mercury environmental protection, color reducibility is good, the life-span is long are becoming the backlight of LCD of main flow gradually.Expect 2010, the LED-backlit module utilization rate of Notebook will rise to 63% by present 20%, replace cold-cathode fluorescence lamp (CCFL) and become to take as the leading factor.Aspect large scale liquid crystal television set (TV), application based on the LED lamp of the dynamic area control technology of LED-backlit and high color reducibility, make color reducibility, contrast and the power consumption aspect of TV that the improvement of internal all be arranged, thereby, Samsung, Sony and domestic each big television manufacturer such as Hisense are also all developed the large scale liquid crystal TV of volume production LED-backlit one after another, release this serial product.
In the prior art, the large scale liquid crystal TV generally uses the direct-light type LED backlight structure.As shown in Figure 1, in the direct-light type LED backlight structure, LED 11 is arranged into array, and light is launched up, penetrates by the mixed light effect of certain distance.This distance provides by the supporter 12 support diffusion sheets 14 that are arranged on the end reflectance coating 13.Behind the mixed light, by diffusion sheet 14, brightness enhancement film 15, obtain luminous uniform backlight again.Because direct LED backlight can use the LED of red-green-blue, realizes white light by the proportioning of adjusting three kinds of colors, three crests of its RGB of the white light that obtains all clearly, therefore, color reducibility is fine.And being placed with of led array formula is beneficial to the accurate control of backlight being carried out single lamp, realizes the dynamic backlight Region control, thereby makes its contrast and power consumption significantly to improve.
The defective that prior art exists is, because the direct-light type LED backlight structure must provide certain light mixing distance, it is even the light of led array could to be mixed, and has so just increased thickness, is unfavorable for that LCD TV develops towards ultra-thin, low-power consumption, high colour gamut, high-contrast direction.
Summary of the invention
The objective of the invention is to propose a kind of mixing film and back light source in LED that is used for the back light source in LED mixed light, to reduce light mixing distance.
For achieving the above object, the invention provides a kind of mixing film that is used for the back light source in LED mixed light, comprise substrate and be arranged at site on the described substrate; Described substrate is made by light transmissive material; Described site is used for light is carried out scattering.
Described substrate is made by polymethyl methacrylate, Merlon or glass; Described substrate can be diffusion sheet or diffusion barrier; Thickness can be 0.2mm～2mm.Described site can be arranged on the described substrate by screen printing mode; Described site comprises that silica or titanium dioxide reach the glue that mixes with described silica or titanium dioxide; Described site can have triangle, semicircular surface.
The present invention also provides a kind of above-mentioned back light source in LED that is used for the mixing film of back light source in LED mixed light that comprises, described mixing film is arranged between LED and the diffusion sheet; Site on the described mixing film is arranged on the substrate directly over the described LED at least.
In the technique scheme, direct LED backlight is by above-mentioned mixing film, LED can be emitted than the transmission of high light line part, end reflectance coating is returned in partial reflection, so just reduced the generation of speck, it is even in shorter distance light to be mixed, thereby has reduced the light mixing distance of direct LED backlight, has satisfied the ultra-thin requirement of direct LED backlight.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the direct-light type LED backlight structural representation that the large scale liquid crystal TV uses in the prior art;
Fig. 2 is used for the structural representation of the mixing film embodiment of back light source in LED mixed light for the present invention;
Fig. 3 is the structural representation of back light source in LED embodiment of the present invention;
Fig. 4 is the side view of back light source in LED embodiment of the present invention.
The specific embodiment
In order to realize even light mixing, do not increase the light mixing distance of direct LED backlight and the quantity of LED again, the embodiment of the invention is by increasing one deck mixing film above LED lamp group, on this mixing film corresponding each group LED lamp directly over be provided with the site, LED can be emitted than the transmission of high light line part, end reflectance coating is returned in partial reflection, has so just reduced the generation of speck, and it is even in shorter distance light to be mixed.
Fig. 2 is used for the structural representation of the mixing film embodiment of back light source in LED mixed light for the present invention.Mixing film comprises substrate 21 and is arranged at site 22 on the described substrate 21.Described substrate 21 can be made by light transmissive material such as polymethyl methacrylate (PMMA), Merlon (PC) or the glass of high permeability, also can be made by the light transmissive material with diffusion, as diffusion sheet of the prior art or diffusion barrier.Diffusion sheet or diffusion barrier are all made by PMMA or PC, and have the effect of light diffusion, the substrate that the described substrate 21 of present embodiment can be PMMA or PC, or diffusion sheet or the diffusion barrier made by these two kinds of materials, also or glass substrate.The thickness of substrate 21 can be 0.2mm～2mm.Described site 22 is used for light is carried out scattering.For further improving the mixed light effect, this site 22 with high reflectance can have irregular surface, as triangle, semicircle or random matsurface.21 places, no site then have high transmittance relatively on the substrate 21, and the luminous energy after the diffusion is seen through smoothly.Site 22 can obtain by modes such as serigraphy, injection mouldings.As, site 22 can be silica (SiO2) or titanium dioxide (TiO2) mixes a certain proportion of glue, generates on substrate 21 by serigraphy.Commercial as the rapids forever light guide ink VINYEIGHT series of Japan etc.
When the mixing film in the foregoing description is used for direct LED backlight, mixing film is arranged at LED lamp and other film materials such as diffusion barrier material, between the brightness enhancement film material etc., and the area distribution of corresponding LED lamp has the site in the mixing film, because this site has higher reflectivity, the highlights reflection that the LED direct projection can be gone out, penetrate by the end reflectance coating reflection of direct LED backlight again, thereby make the LED lamp become the larger area area source than the spot light of small size, under the constant situation of LED quantity, increase the mixed light effect, thereby reduced the light mixing distance of direct LED backlight.
Fig. 3 is the structural representation of back light source in LED embodiment of the present invention.Mixing film 32 is placed in the top of led array 31, is diffusion barrier material 33 on the mixing film 32, is brightness enhancement film material 34 then.Mixing film 32 can be any one mixing film that provides among the above-mentioned film embodiment.
In the present embodiment, the side view of back light source in LED as shown in Figure 4.LED 42 is luminous up, the substrate 44 of part light penetration mixing film 32 penetrates, part light runs into the site 45 back generation scatterings of mixing film 32 in addition, light towards the lower edge each to scattering, after through end reflectance coating 41 reflexs, pass mixing film 32 more up or be scattered once more, constantly repeat this process.The light that sees through mixing film 32 penetrates through diffusion barrier material 47 and 48 effects of brightness enhancement film material again, has realized even mixed light and towards center angle optically focused.Wherein, mixing film 32 supports by little supporter 43, and diffusion barrier material 47 and brightness enhancement film material 48 support by big supporter 46.When mixing film 32 sizes hour, can not have little supporter 43.When mixing film 32 sizes are big, as more than 32 o'clock, be subjected to gravity deformation easily, need little supporter 43 and support, to prevent distortion.When the distance between mixing film 32 and the led array 31 is enough to reach when satisfying the mixed light effect of requirement, can there be big supporter 46 yet, at this moment, diffusion barrier material 47 and brightness enhancement film material 48 stick together with mixing film 32.
In the present embodiment, site 45 can not only distribute LED lamp group directly over, can also be distributed on the whole base plate 44, the dot density of position is greater than the dot density of other position distribution on the substrate 44 directly over the corresponding LED lamp group.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1, a kind of mixing film that is used for the back light source in LED mixed light is characterized in that, comprises substrate and is arranged at site on the described substrate; Described substrate is made by light transmissive material; Described site is used for light is carried out scattering.
2, the mixing film that is used for the back light source in LED mixed light according to claim 1 is characterized in that, described substrate is made by polymethyl methacrylate, Merlon or glass.
3, the mixing film that is used for the back light source in LED mixed light according to claim 1 is characterized in that, described substrate is diffusion sheet or diffusion barrier.
4, the mixing film that is used for the back light source in LED mixed light according to claim 1 is characterized in that, described substrate thickness is 0.2mm～2mm.
5, according to each described mixing film that is used for the back light source in LED mixed light among the claim 1-4, it is characterized in that described site is arranged on the described substrate by screen printing mode.
6, the mixing film that is used for the back light source in LED mixed light according to claim 5 is characterized in that, described site comprises that silica or titanium dioxide reach the glue that mixes with described silica or titanium dioxide.
7, according to each described mixing film that is used for the back light source in LED mixed light among the claim 1-4, it is characterized in that described site has triangle, semicircular surface.
8, a kind ofly comprise each described back light source in LED that is used for the mixing film of back light source in LED mixed light among the aforesaid right requirement 1-7, it is characterized in that described mixing film is arranged between LED and the diffusion sheet; Site on the described mixing film is arranged on the substrate directly over the described LED at least.
9, back light source in LED according to claim 8 is characterized in that, the dot density on the substrate directly over the described LED is greater than other parts of described substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810222972A CN101684921A (en) | 2008-09-24 | 2008-09-24 | Light mixing film for mixing light from light emitting diode backlight source and light emitting diode backlight source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810222972A CN101684921A (en) | 2008-09-24 | 2008-09-24 | Light mixing film for mixing light from light emitting diode backlight source and light emitting diode backlight source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101684921A true CN101684921A (en) | 2010-03-31 |
Family
ID=42048210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810222972A Pending CN101684921A (en) | 2008-09-24 | 2008-09-24 | Light mixing film for mixing light from light emitting diode backlight source and light emitting diode backlight source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101684921A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213397A (en) * | 2010-04-08 | 2011-10-12 | 海洋王照明科技股份有限公司 | Light guide and manufacturing method |
| WO2013033936A1 (en) * | 2011-09-08 | 2013-03-14 | 深圳市华星光电技术有限公司 | Led backlight module and liquid crystal display device |
| CN103256563A (en) * | 2013-05-09 | 2013-08-21 | 京东方科技集团股份有限公司 | Reflective film, backlight module and display device |
| TWI556038B (en) * | 2014-10-16 | 2016-11-01 | 蘇州璨宇光學有限公司 | Backlight module |
| TWI662336B (en) * | 2018-03-29 | 2019-06-11 | 友達光電股份有限公司 | Backlight module with light modulation device |
| CN110456558A (en) * | 2018-05-08 | 2019-11-15 | 京东方科技集团股份有限公司 | Optical film material, backlight and display device |
| CN111240094A (en) * | 2020-03-12 | 2020-06-05 | 京东方科技集团股份有限公司 | Area light source |
| WO2021047023A1 (en) * | 2019-09-12 | 2021-03-18 | 武汉华星光电技术有限公司 | Backlight module |
-
2008
- 2008-09-24 CN CN200810222972A patent/CN101684921A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213397A (en) * | 2010-04-08 | 2011-10-12 | 海洋王照明科技股份有限公司 | Light guide and manufacturing method |
| WO2013033936A1 (en) * | 2011-09-08 | 2013-03-14 | 深圳市华星光电技术有限公司 | Led backlight module and liquid crystal display device |
| CN103256563A (en) * | 2013-05-09 | 2013-08-21 | 京东方科技集团股份有限公司 | Reflective film, backlight module and display device |
| CN103256563B (en) * | 2013-05-09 | 2015-02-11 | 京东方科技集团股份有限公司 | Backlight module and display device |
| TWI556038B (en) * | 2014-10-16 | 2016-11-01 | 蘇州璨宇光學有限公司 | Backlight module |
| TWI662336B (en) * | 2018-03-29 | 2019-06-11 | 友達光電股份有限公司 | Backlight module with light modulation device |
| CN110456558A (en) * | 2018-05-08 | 2019-11-15 | 京东方科技集团股份有限公司 | Optical film material, backlight and display device |
| CN110456558B (en) * | 2018-05-08 | 2022-08-19 | 京东方科技集团股份有限公司 | Optical film material, backlight source and display device |
| WO2021047023A1 (en) * | 2019-09-12 | 2021-03-18 | 武汉华星光电技术有限公司 | Backlight module |
| CN111240094A (en) * | 2020-03-12 | 2020-06-05 | 京东方科技集团股份有限公司 | Area light source |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7703973B2 (en) | Backlight module | |
| US8814377B2 (en) | Backlight unit and display apparatus using the same | |
| CN101684921A (en) | Light mixing film for mixing light from light emitting diode backlight source and light emitting diode backlight source | |
| US7656580B2 (en) | Light diffusing sheet with two kinds of light diffusion particles | |
| CN102767762B (en) | Backlight module | |
| US10241255B2 (en) | Backlight module and liquid crystal display | |
| JP2010272245A (en) | Backlight unit and liquid crystal display equipped with this | |
| CN100427975C (en) | Backlight module and diffusion board structure used thereby | |
| CN101206280A (en) | Light guide board and back light module unit using the same | |
| CN101000387A (en) | Prism and backlight module using the prism | |
| TW200817726A (en) | Light guide plate and back-lighted module having light guide plate | |
| CN101936489A (en) | Backlight module and optical assembly thereof | |
| KR20120067550A (en) | Backlight unit and liquid crystal display using the same | |
| JP2007241272A (en) | Light diffusion film | |
| US20090130340A1 (en) | Light diffusion plate and backlight module using the same | |
| CN108267893B (en) | A kind of no light guide plate bottom luminous backlight source | |
| JP2012018880A (en) | Planar lighting device, image display device, and optical sheet | |
| KR20110135097A (en) | Liquid crystal display device module | |
| CN101666459A (en) | Backlight membrane material and LED backlight source | |
| CN201973601U (en) | Novel backlight module | |
| CN202469747U (en) | Sidelight-type backlight module and display device | |
| KR100838681B1 (en) | Optical sheet, backlight unit and liquid crystal display device using the same | |
| KR20070109125A (en) | Diffusing plate, back light unit and liquid crystal display having the same | |
| KR101418119B1 (en) | Backlight unit and liquid crystal display device having the same | |
| CN201859228U (en) | Light diffusion plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100331 |
|
| RJ01 | Rejection of invention patent application after publication |