CN101526692A - Side-light type back light - Google Patents
Side-light type back light Download PDFInfo
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- CN101526692A CN101526692A CN200810101457A CN200810101457A CN101526692A CN 101526692 A CN101526692 A CN 101526692A CN 200810101457 A CN200810101457 A CN 200810101457A CN 200810101457 A CN200810101457 A CN 200810101457A CN 101526692 A CN101526692 A CN 101526692A
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- light
- guide plate
- type back
- light source
- light guide
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Abstract
The invention discloses a side-light type back light, which comprises at least one light source and a light guide plate, wherein a lens is correspondingly arranged between each light source and the light guide plate, and is used for converging incident light of the corresponding light source. The side-light type back light is provided with a lens used for converging the incident light of the corresponding light source between the light source and the light guide plate, thereby effectively improving the utilization rate of the incident light of the light source, reducing the attenuation of light intensity and increasing the brightness of a crystal liquid display screen.
Description
Technical field
The present invention relates to LCD (Liquid Crystal Display, LCD) field, especially a kind of side-light type back light (Back Light, BL).
Background technology
At present, (Flat Panel Display, FPD) in the technology, LCD occupy dominant position, and transmission type LCD is the main flow of current LCD technology in flat pannel display.Because LCD panel itself is not luminous, must add on the LCD panel that a light emitting source just can make LCD show, so backlight is absolutely necessary for transmission type LCD.
In general, according to the difference of distribution of light sources position, backlight can be divided into photometry formula backlight and direct-light-type backlight.Side-light type back light is mainly used in LCD at present, and direct-light-type backlight then is mainly used in LCD TV.
As shown in Figure 1, be the structural representation of side-light type back light in the prior art.Typical side-light type back light is made up of light source 1, light source reflecting housing 2, light guide plate 3 and reflecting plate 4.Its groundwork process is: the light that light source sends is coupled into after the light guide plate between bottom surface on the light guide plate and two sides back and forth from the light guide plate front end face that total reflection advances to light guide plate terminal surface direction, when being mapped to the scattering netted dot of bottom surface, thereby reflected light is to all directions scattering and destroy total reflection condition part scattered light and have an opportunity to transmit light guide plate from upper bottom surface, becomes output light.At present both at home and abroad the light source of the backlight that on LCD, generally uses be cold-cathode fluorescence lamp (Cold Cathode Fluorescent Lamp, CCFL), its life-span was 20,000 hours; For utilizing the scattered light that spills at reverse side to be provided with reflecting plate once more.
At least have following defective in the above-mentioned prior art: the light that passes light guide plate will could be exported through repeatedly reflecting, and the light intensity of output light is attenuated to a certain extent, has reduced the brightness of backlight.
Summary of the invention
The purpose of this invention is to provide a kind of side-light type back light,, reduce, improve utilization of incident light, increase the brightness of backlight owing to the more light intensity attenuation that causes of anaclasis number of times in order to reduce the refraction number of times of incident light in light guide plate from light source.
For achieving the above object, the invention provides a kind of side-light type back light, comprise at least one light source and light guide plate, wherein, the corresponding lens that are provided with between each light source and the described light guide plate are used to assemble the incident light from corresponding light source.
As shown from the above technical solution, the present invention is used to assemble lens from the incident light of corresponding light source by what set up between light source and light guide plate, can improve utilization of incident light effectively, reduce light intensity attenuation, increase the brightness of LCDs from light source.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the structural representation of side-light type back light in the prior art;
Fig. 2 is the structural representation of first embodiment of side-light type back light of the present invention;
Fig. 3 is another structural representation of first embodiment of side-light type back light of the present invention;
Fig. 4 is the structural representation of second embodiment of side-light type back light of the present invention;
Fig. 5 is another structural representation of second embodiment of side-light type back light of the present invention.
Embodiment
Brightness is an important parameter in the backlight performance, has only the backlight of high brightness could make that picture color is more bright-coloured.Side-light type back light of the present invention can provide the light of high brightness to improve the brightness of LCDs.
As shown in Figure 2, be the structural representation of first embodiment of side-light type back light of the present invention.Present embodiment comprises a light source 10, light guide plate 20, light source reflecting housing 30, reflecting plate 40, and wherein the corresponding convex lens 50 that are provided with between light source 10 and the light guide plate 20 are used to assemble the incident light from light source 10.The height of convex lens 50 should be identical with the height of light guide plate or be close, should concentrate between 1 ° to 10 ° so that enter the ray refraction angle of light guide plate, promptly this incident light is 1～10 ° from the included angle A that the front end face of light guide plate 20 is coupled into light guide plate 20 backs and horizontal direction as far as possible.The focal length of convex lens 50 can be 0.5mm～2mm, and the position at light source 10 centers should be that the center of circle and radius are in the annulus of 0.1mm～0.8mm in the focus with convex lens 50.
The convex lens of present embodiment by between light source and light guide plate, increasing, utilize convex lens to regulate to enter the incident direction of light of light guide plate, what the feasible refraction number of times of light in light guide plate that enters light guide plate tried one's best lacks, can improve the utilization factor of light so effectively, increase the brightness of LCDs, can also make brightness backlight more even simultaneously.In order to reduce the size of backlight, the surface configuration of the adjacent side of convex lens and light guide plate will match each other, and can allow the distance between convex lens and the light guide plate as far as possible little like this, thereby when guaranteeing to obtain the identical optical effect, has reduced the size of backlight.
Further, for increase backlight the brightness of light can be provided, in the present embodiment a plurality of light sources can also be set, correspondingly, can be at the corresponding convex lens that are provided with between each light source and the light guide plate, it is corresponding with it that promptly each light source all has convex lens.As shown in Figure 3, be another structural representation of first embodiment of side-light type back light of the present invention.The placement situation of the placement location of each light source when a light source is arranged is identical, guarantee that it is between 1 ° to 10 ° that the refraction angle of light in light guide plate mainly concentrates on, thereby more effectively improve utilization of incident light, reduce the decay of light intensity, increased the brightness and the uniformity coefficient of LCD panel.
As shown in Figure 4, be the structural representation of second embodiment of side-light type back light of the present invention.Compare with a last embodiment, in the present embodiment, can replace convex lens 50, can realize identical effect equally with Fresnel Lenses 60.Fresnel Lenses is to rely on the Fresnel theory to be developed by plano-convex lens, and it is a kind of alienation of plano-convex lens, and it has characteristics such as short focal length, large aperture and thickness are little, can obtain illumination condition more soft, even light distribution.Similarly, as shown in Figure 5, be another structural representation of second embodiment of side-light type back light of the present invention.Place Fresnel Lenses in the present embodiment with respect to the situation of placing convex lens, can dwindle the distance between light source and the light guide plate, thereby reduce the weight of LCDs, make LCDs lightweight more, miniaturization.
The lens with converging ray effect of the above embodiment of the present invention by between light source and light guide plate, increasing, utilize lens to regulate to enter the incident direction of light of light guide plate, can reduce the refraction number of times of light in light guide plate that enters light guide plate, thereby improve the utilization factor of light effectively, increase the brightness of LCDs, can also make brightness backlight more even simultaneously.Matching each other of the surface configuration of the adjacent side of scioptics and light guide plate can be so that the distance between lens and the light guide plate be as far as possible little, thereby can realize the backlight that size is less when guaranteeing to obtain the identical optical effect.
It should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not limit it, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solution of the present invention.
Claims (7)
1, a kind of side-light type back light comprises at least one light source and light guide plate, it is characterized in that, the corresponding lens that are provided with between each light source and the described light guide plate are used to assemble the incident light from corresponding light source.
2, side-light type back light according to claim 1 is characterized in that the focus that is centered close to corresponding lens of described light source is that center of circle radius is in the annulus of 0.1mm～0.8mm.
3, side-light type back light according to claim 1, the focal length that it is characterized in that described lens is 0.5～2mm.
4,, it is characterized in that described lens are convex lens according to claim 1,2 or 3 described side-light type back lights.
5, side-light type back light according to claim 4 is characterized in that the shape of the front end face of the shape of the one side that described convex lens are relative with described light guide plate and described light guide plate is mated mutually.
6,, it is characterized in that described lens are Fresnel Lenses according to claim 1,2 or 3 described side-light type back lights.
7, side-light type back light according to claim 6 is characterized in that the shape of the front end face of the shape of the one side that described Fresnel mirror is relative with light guide plate and described light guide plate is mated mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810101457A CN101526692A (en) | 2008-03-06 | 2008-03-06 | Side-light type back light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810101457A CN101526692A (en) | 2008-03-06 | 2008-03-06 | Side-light type back light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101526692A true CN101526692A (en) | 2009-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810101457A Pending CN101526692A (en) | 2008-03-06 | 2008-03-06 | Side-light type back light |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244840A (en) * | 2012-02-08 | 2013-08-14 | 东莞万士达液晶显示器有限公司 | Polarized light source assembly |
| CN103742834A (en) * | 2013-10-18 | 2014-04-23 | 友达光电股份有限公司 | Transparent display device and backlight module used by same |
| WO2015070452A1 (en) * | 2013-11-13 | 2015-05-21 | 深圳市华星光电技术有限公司 | Backlight module |
| CN105020655A (en) * | 2015-08-06 | 2015-11-04 | 麦格纳斯太尔汽车技术（上海）有限公司 | Front anti-collision early-warning and displaying module for automobile |
| CN106444161A (en) * | 2016-12-21 | 2017-02-22 | 深圳Tcl新技术有限公司 | Liquid crystal display device |
| CN106773323A (en) * | 2017-02-23 | 2017-05-31 | 惠州市华阳多媒体电子有限公司 | A kind of efficiency of light energy utilization backing structure high |
| CN107783223A (en) * | 2017-09-27 | 2018-03-09 | 深圳Tcl新技术有限公司 | Backlight module and display device |
| WO2018145455A1 (en) * | 2017-02-09 | 2018-08-16 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN112180651A (en) * | 2020-10-29 | 2021-01-05 | 浙江富申科技有限公司 | Electronic paper display module integrated with light emitting source |
| WO2021031404A1 (en) * | 2019-08-20 | 2021-02-25 | Tcl华星光电技术有限公司 | Backlighting module and display device |
-
2008
- 2008-03-06 CN CN200810101457A patent/CN101526692A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244840A (en) * | 2012-02-08 | 2013-08-14 | 东莞万士达液晶显示器有限公司 | Polarized light source assembly |
| CN103742834A (en) * | 2013-10-18 | 2014-04-23 | 友达光电股份有限公司 | Transparent display device and backlight module used by same |
| WO2015070452A1 (en) * | 2013-11-13 | 2015-05-21 | 深圳市华星光电技术有限公司 | Backlight module |
| CN105020655A (en) * | 2015-08-06 | 2015-11-04 | 麦格纳斯太尔汽车技术（上海）有限公司 | Front anti-collision early-warning and displaying module for automobile |
| CN106444161A (en) * | 2016-12-21 | 2017-02-22 | 深圳Tcl新技术有限公司 | Liquid crystal display device |
| WO2018145455A1 (en) * | 2017-02-09 | 2018-08-16 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN106773323A (en) * | 2017-02-23 | 2017-05-31 | 惠州市华阳多媒体电子有限公司 | A kind of efficiency of light energy utilization backing structure high |
| CN107783223A (en) * | 2017-09-27 | 2018-03-09 | 深圳Tcl新技术有限公司 | Backlight module and display device |
| WO2019062239A1 (en) * | 2017-09-27 | 2019-04-04 | 深圳Tcl新技术有限公司 | Backlight module and display device |
| WO2021031404A1 (en) * | 2019-08-20 | 2021-02-25 | Tcl华星光电技术有限公司 | Backlighting module and display device |
| CN112180651A (en) * | 2020-10-29 | 2021-01-05 | 浙江富申科技有限公司 | Electronic paper display module integrated with light emitting source |
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Application publication date: 20090909 |