CN102287714A - Backlight system with optical grating - Google Patents
Backlight system with optical grating Download PDFInfo
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- CN102287714A CN102287714A CN 201110239372 CN201110239372A CN102287714A CN 102287714 A CN102287714 A CN 102287714A CN 201110239372 CN201110239372 CN 201110239372 CN 201110239372 A CN201110239372 A CN 201110239372A CN 102287714 A CN102287714 A CN 102287714A
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Abstract
The invention discloses a backlight system with an optical grating. The backlight system comprises at least one LED light source, a two-dimensional optical grating is arranged above each LED light source, a diffusion film is arranged above the two-dimensional optical grating, and a prism film is arranged above the diffusion film. When the LED light source is a blue LED, the backlight system further comprises a fluorescent film 3, and the fluorescent film 3 is arranged between the diffusion film 4 and the two-dimensional optical grating 2. The diffusion of a backlight source is realized by utilizing diffraction of the two-dimensional optical grating, thus an original optical beam passes through the light grating to form a plurality of light beams, and the plurality of light beams irradiate the diffusion film and forms a uniform surface optical source through multiple scattering of the diffusion film, thus the thickness of liquid crystal display backlight can be reduced, and the brightness can be increased.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly relate to a kind of back light system with grating.
Background technology
Liquid crystal display backlight has dual mode: straight-down negative and side entering type.Its structure is: the diffuser plate between light source, the reflector plate at light source, light source and the liquid crystal panel.The advantage of straight-down negative is that efficiency of light energy utilization height, bright dipping are even, often adopts straight-down negative in large scale liquid crystal shows.But in order to make bright dipping even, need certain distance between light source and the diffusion sheet in direct-type backlight, it is thin to make whole liquid crystal display to do like this.Simultaneously,, need on the LGP complicated scattering netted dot is set, increased the loss of luminous energy in order to eliminate the bright spot between the light source.Bright dipping simultaneously can not be enough even.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of back light system with grating is provided, utilize the two-dimensional grating diffraction to realize the diffusion of backlight, make an original light beam by forming a plurality of light beams after the grating, shine scattering film, repeatedly scattering by scattering film forms uniform surface light source, thereby can reduce the thickness of LCD backlight, improves brightness.
Technical solution of the present invention is as follows:
A kind of back light system with grating, its characteristics are that this back light system comprises at least one led light source, have two-dimensional grating above this each led light source, above all described two-dimensional gratings, have a diffusion barrier, above this diffusion barrier, have a prism film;
When described led light source was blue-ray LED, described back light system also comprised fluorescent film, and this fluorescent film is positioned at described diffusion barrier below.
Described two-dimensional grating is one deck grating film or multi-layer grating film.
The cycle of described grating film is identical or inequality, and the lattice structure of described grating film is identical or inequality.
The lattice structure of described grating is rectangle, triangle, annular or accurate crystalline form.
Compared with prior art, the invention has the beneficial effects as follows the diffusion that utilizes the two-dimensional grating diffraction to realize backlight, make bright dipping more even, the thickness of liquid crystal display is thinner, improves brightness.
Description of drawings
Fig. 1 is first kind of embodiment of the back light system of the present invention with grating.
Fig. 2 is second kind of embodiment of the back light system of the present invention with grating.
Fig. 3 is the third embodiment of the back light system of the present invention with grating.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is done further introduction, but should not limit protection scope of the present invention with this.
See also Fig. 1, Fig. 2 and Fig. 3, as shown in the figure, a kind of back light system with grating, comprise at least one led light source 1, above this each led light source 1, have two-dimensional grating 2, above all described two-dimensional gratings 2, have a diffusion barrier 4, above this diffusion barrier 4, have a prism film 5.When described led light source was blue-ray LED, described back light system also comprised fluorescent film 3, and this fluorescent film 3 is positioned at described diffusion barrier 4 belows.Two-dimensional grating 2 is one deck grating film or multi-layer grating film.The cycle of grating film is identical or inequality, and the lattice structure of described grating film is identical or inequality.The lattice structure of grating is rectangle, triangle, annular or accurate crystalline form.
Fig. 1 is first kind of embodiment of the back light system of the present invention with grating, and wherein each led light source 1 is a blue-ray LED, all has a two-dimensional grating 2 on each blue-ray LED.Form the light with two-dimensional lattice after the process of the light on blue-ray LED two-dimensional grating, the illumination of these dot matrix is mapped to fluorescent film 3, and blue-light excited gold-tinted forms white light at last.Diffusion barrier 4 is set above fluorescent film 3 forms a uniform surface light source, above this diffusion barrier 4, prism film 5 is set, in order to improve positive brightness.
Fig. 2 is second kind of embodiment of the back light system of the present invention with grating, and substantially the same manner as Example 1, difference is to have two layers of two-dimensional grating 2 on blue-ray LED.Light on the blue-ray LED is through forming the light with two-dimensional lattice after the ground floor two-dimensional grating, above this ground floor two-dimensional grating, second layer two-dimensional grating is arranged still, make a branch of light be divided into several Shu Guang once more, the illumination of these dot matrix is mapped to fluorescent film 3, blue-light excited gold-tinted, form white light at last, compare one deck two-dimensional grating of embodiment 1, such that bright dipping is set is more even.Above fluorescent film 3, be provided with diffusion barrier 4, form a uniform surface light source, above this diffusion barrier 4, also be provided with prism film 5, in order to improve positive brightness.
Fig. 3 is the third embodiment of the back light system of the present invention with grating, and is substantially the same manner as Example 2, and difference is that wherein led light source 1 is white light LEDs.A branch of white light LEDs is divided into multi-beam through after the grating, is placed with diffusion barrier 4 and prism film 5 above exiting surface successively, and the repeatedly scattering formation uniform surface light source by diffusion barrier improves brightness by prism film 5 at last, forms the uniform white light illumination.
Claims (4)
1. back light system with grating, it is characterized in that, this back light system comprises at least one led light source (1), has two-dimensional grating (2) in this each led light source (1) top, have a diffusion barrier (4) in the top of all described two-dimensional gratings (2), have a prism film (5) in the top of this diffusion barrier (4); When described led light source was blue-ray LED, described back light system also comprised fluorescent film (3), and this fluorescent film (3) is positioned at the top of described diffusion barrier (4) below and described two-dimensional grating (2).
2. as claims 1 described back light system, it is characterized in that described two-dimensional grating (2) is one deck grating film or multi-layer grating film with grating.
3. as claims 2 described back light systems with grating, it is characterized in that the cycle of described grating film is identical or inequality, the lattice structure of described grating film is identical or inequality.
4. as claims 3 described back light systems, it is characterized in that the lattice structure of described grating is rectangle, triangle, annular or accurate crystalline form with grating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110239372 CN102287714A (en) | 2011-08-19 | 2011-08-19 | Backlight system with optical grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110239372 CN102287714A (en) | 2011-08-19 | 2011-08-19 | Backlight system with optical grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102287714A true CN102287714A (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110239372 Pending CN102287714A (en) | 2011-08-19 | 2011-08-19 | Backlight system with optical grating |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107092129A (en) * | 2016-09-30 | 2017-08-25 | 深圳市玲涛光电科技有限公司 | Light source assembly, display device and electronic equipment |
| CN108139038A (en) * | 2015-10-09 | 2018-06-08 | 松下知识产权经营株式会社 | Wavelength converter and lighting device |
| CN109324443A (en) * | 2018-11-23 | 2019-02-12 | 京东方科技集团股份有限公司 | A kind of backlight module, display device and optical device |
| CN110161600A (en) * | 2019-07-09 | 2019-08-23 | 京东方科技集团股份有限公司 | A kind of array substrate and preparation method thereof and liquid crystal display device |
| CN110262129A (en) * | 2019-06-19 | 2019-09-20 | 合肥工业大学 | A kind of backlight module and its liquid crystal display of application |
| US20190361294A1 (en) * | 2018-05-22 | 2019-11-28 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Planar backlight module and lcd panel |
| WO2019223202A1 (en) * | 2018-05-22 | 2019-11-28 | 武汉华星光电技术有限公司 | Backlight module having surface light source, and liquid crystal display panel |
| CN111812887A (en) * | 2019-04-11 | 2020-10-23 | 合肥工业大学 | Laser backlight module and liquid crystal display using same |
| US20220026766A1 (en) * | 2019-04-11 | 2022-01-27 | Hefei University Of Technology | Backlight module, liquid crystal display, and electronic device |
| CN114002882A (en) * | 2021-11-26 | 2022-02-01 | 杭州英诺维科技有限公司 | Mini LED backlight module structure |
| CN114002882B (en) * | 2021-11-26 | 2024-04-30 | 杭州英诺维科技有限公司 | Mini LED backlight module structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108139038A (en) * | 2015-10-09 | 2018-06-08 | 松下知识产权经营株式会社 | Wavelength converter and lighting device |
| CN107092129A (en) * | 2016-09-30 | 2017-08-25 | 深圳市玲涛光电科技有限公司 | Light source assembly, display device and electronic equipment |
| US20190361294A1 (en) * | 2018-05-22 | 2019-11-28 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Planar backlight module and lcd panel |
| WO2019223202A1 (en) * | 2018-05-22 | 2019-11-28 | 武汉华星光电技术有限公司 | Backlight module having surface light source, and liquid crystal display panel |
| CN109324443A (en) * | 2018-11-23 | 2019-02-12 | 京东方科技集团股份有限公司 | A kind of backlight module, display device and optical device |
| CN111812887A (en) * | 2019-04-11 | 2020-10-23 | 合肥工业大学 | Laser backlight module and liquid crystal display using same |
| US20220026766A1 (en) * | 2019-04-11 | 2022-01-27 | Hefei University Of Technology | Backlight module, liquid crystal display, and electronic device |
| US11733562B2 (en) * | 2019-04-11 | 2023-08-22 | Hefei University Of Technology | Backlight module comprising a diffractive optical element configured to shape a collimated elliptical spot into a rectangular spot with a larger area |
| CN110262129A (en) * | 2019-06-19 | 2019-09-20 | 合肥工业大学 | A kind of backlight module and its liquid crystal display of application |
| CN110161600A (en) * | 2019-07-09 | 2019-08-23 | 京东方科技集团股份有限公司 | A kind of array substrate and preparation method thereof and liquid crystal display device |
| CN114002882A (en) * | 2021-11-26 | 2022-02-01 | 杭州英诺维科技有限公司 | Mini LED backlight module structure |
| CN114002882B (en) * | 2021-11-26 | 2024-04-30 | 杭州英诺维科技有限公司 | Mini LED backlight module structure |
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Application publication date: 20111221 |