CN101144582A - Light-emitting diode backlight module - Google Patents
Light-emitting diode backlight module Download PDFInfo
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- CN101144582A CN101144582A CNA2007101674459A CN200710167445A CN101144582A CN 101144582 A CN101144582 A CN 101144582A CN A2007101674459 A CNA2007101674459 A CN A2007101674459A CN 200710167445 A CN200710167445 A CN 200710167445A CN 101144582 A CN101144582 A CN 101144582A
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- light
- emitting diode
- led
- backlight module
- circuit board
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Abstract
The invention discloses a light-emitting diode back light module, which comprises a plurality of light-emitting diode units and diffusivity material, wherein, the light-emitting diode units are arranged on a circuit board, and the diffusivity material covers the light-emitting diode units. The back light module provides even and bright back light sources for a liquid crystal display, reduces the application of the optical film, and debases the process complexity.
Description
Technical field
The present invention is relevant for a kind of backlight module, particularly relevant for a kind of light-emitting diode (LED) backlight module.
Background technology
LCD is widely used in LCD TV, notebook computer, mobile phone, digital camera, personal digital assistant (Personal Digital Assistant at present; Electronic product such as PDA), it has advantages such as low in energy consumption, in light weight and thin thickness.
Because liquid crystal itself is not luminous, LCD need see through external light source come display frame, so the backlight module indispensable part that is LCD.Backlight module provides light source for LCD, mainly partly is made up of light source, blooming and framework etc.
The backlight module light source includes cathode fluorescent tube (Cold Cathode Fluorescent Lamp; CCFL) and light emitting diode (Light Emitting Diode; Type such as LED).Characteristics such as light emitting diode has that brightness height, excitation height, life-span are long, no mercury and reliability are good.
How existing light-emitting diode (LED) backlight module uses with several layers of blooming collocation light emitting diode.With reference to Fig. 1, it is the structural representation of existing light-emitting diode (LED) backlight module.Light-emitting diode (LED) backlight module 100 has a plurality of LED package 110, and it is positioned on the circuit board 130, and posts reflector plate 150 on the circuit board 130, and collocation is diffusion sheet 170a, light-collecting piece 190 and last diffusion sheet 170b down, to reach required brightness.
Therefore, existing light-emitting diode (LED) backlight module need use the multi-disc blooming, so that the backlight of LCD homogeneous and bright to be provided, and then causes increasing the complexity of production cost and its technology.
Summary of the invention
In view of this, in order to address the above problem, a purpose of the present invention provides a kind of light-emitting diode (LED) backlight module, utilize a plurality of light emitting diodes and be coated on its outer diffusion material, provide the backlight of LCD homogeneous and bright, to reach use that reduces blooming and the effect that reduces process complexity.
In order to reach above-mentioned purpose, the invention provides a kind of light-emitting diode (LED) backlight module, it comprises a circuit board, a plurality of light emitting diode and a diffusion material, and wherein light emitting diode is positioned on the circuit board, and diffusion material coats light emitting diode.
According to such scheme, effect of the present invention is significant: the disclosed light-emitting diode (LED) backlight module of the present invention can provide the backlight of LCD homogeneous and bright, and can reduce the usage quantity and reduction process complexity of blooming.
Description of drawings
Fig. 1 is existing light-emitting diode (LED) backlight module structural representation.
Fig. 2 is a light-emitting diode (LED) backlight module structural representation of the present invention.
The main element symbol description
100: light-emitting diode (LED) backlight module 110: LED package
130: circuit board 150: reflector plate
170a: following diffusion sheet 170b: go up diffusion sheet
190: light-collecting piece 200: light-emitting diode (LED) backlight module
210: light emitting diode 211: light-emitting diode chip for backlight unit
230: circuit board 250: reflecting layer
270: diffusion material 271: the high index of refraction material
273: diffusion particle 290: prism microstructure
The specific embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described below in detail.
With reference to Fig. 2, it is the structural representation of light-emitting diode (LED) backlight module of the present invention.Light-emitting diode (LED) backlight module 200 has a plurality of light emitting diodes 210, is disposed on the circuit board 230.Each light emitting diode 210 contains at least one light-emitting diode chip for backlight unit 211.Light-emitting diode chip for backlight unit 211 is with the direct packaged type of chip (Chip on Board; COB) directly be incorporated on the circuit board 230.
In preferred embodiment, the ejaculation light of each light emitting diode 210 is solid color light source and color is identical each other.For example, solid color light source other colour light source of can be white light, ruddiness, green glow, blue light, gold-tinted, orange light or utilizing light emitting diode to produce.Light-emitting diode chip for backlight unit 211 in the light emitting diode 210 also can utilize the chip of a plurality of different colours, to form the solid color light source.For example, light emitting diode 210 can be the combination of red, green, blue look, but not as limit.This three primary colors collocation for example is a white light to present.In addition, light emitting diode 210 can use separately and present red, green, blue respectively.For example, the blue led chips yellow fluorophor of can arranging in pairs or groups again uses, and also can present white light.
Diffusion material 270 is directly to coat light emitting diode 210, to reach the even brightness purpose.In preferred embodiment, diffusion material 270 is to be combined by high index of refraction material 271 and diffusion particle 273, wherein the refractive index of high index of refraction material 271 between 1.2 and 2.5, and diffusion particle 273 evenly distributions are wherein.
In preferred embodiment, high index of refraction material 271 is the thermosetting or the thermoplastic resin of the transparency, and it can be by being heated or being subjected to light reaction to become one to solidify diffusion material, and light-emitting diode chip for backlight unit is coated on the circuit board.In addition, diffusion particle 273 also comprises fluorophor; For example, the light-emitting diode chip for backlight unit 211 of the short-wave band yellow fluorophor of can arranging in pairs or groups is a diffusion particle 273, perhaps collocation red with green-emitting phosphor be diffusion particle 273.Here, the short-wave band scope is meant between 300 to 500 nanometers (nm).
In preferred embodiment, has reflecting layer 250 on the circuit board 230.Reflecting layer 250 can be and directly is coated with the reflection material that invests circuit board 230, also can be the reflector plate that is attached on the circuit board 230.Circuit board 230 can be metallic core circuit board (Metal Core PCB; MCPCB), in order to light-emitting diode chip for backlight unit 211 heat radiations.
In preferred embodiment, diffusion material 270 has prism microstructure 290.Prism microstructure 290 can directly mould on diffusion material 270, perhaps mould in another blooming (as: diffusion barrier, light-collecting piece etc.), and the configuration of this blooming is positioned on the diffusion material 270, so that the effect of optically focused to be provided.
The present invention can be according to actual demand other blooming (as: reflector plate, diffusion barrier, light-collecting piece etc.) of arranging in pairs or groups, and to reach the optical effect of expection, it does not all break away from spirit of the present invention and scope.
Though oneself discloses the present invention as above with preferred embodiment; right its is not in order to limit the present invention; any general skill person who has the knack of the technical field of the invention; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the scope that claims define.
Claims (19)
1. a light-emitting diode (LED) backlight module is characterized in that, comprising:
One circuit board;
A plurality of light emitting diodes are disposed on this circuit board; And
One diffusion material coats those light emitting diodes.
2. light-emitting diode (LED) backlight module as claimed in claim 1 is characterized in that, those light emitting diodes are to be configured on this circuit board with the direct packaged type of chip.
3. light-emitting diode (LED) backlight module as claimed in claim 1 is characterized in that those light emitting diodes all present solid color light.
4. light-emitting diode (LED) backlight module as claimed in claim 3 is characterized in that, this solid color light is white light.
5. light-emitting diode (LED) backlight module as claimed in claim 1 is characterized in that, respectively comprises at least one light-emitting diode chip for backlight unit in those light emitting diodes.
6. light-emitting diode (LED) backlight module as claimed in claim 1 is characterized in that, respectively comprises the light-emitting diode chip for backlight unit of at least two different colours in those light emitting diodes.
7. light-emitting diode (LED) backlight module as claimed in claim 1 is characterized in that, those light emitting diodes respectively comprise a redness, a green and blue led chips.
8. light-emitting diode (LED) backlight module as claimed in claim 1 is characterized in that, this diffusion material comprises a high index of refraction material and a plurality of diffusion particle, and the refractive index of this high index of refraction material is between 1.2 to 2.5.
9. light-emitting diode (LED) backlight module as claimed in claim 8 is characterized in that, this high index of refraction material is a transparent thermoplastic resin.
10. light-emitting diode (LED) backlight module as claimed in claim 8 is characterized in that, this high index of refraction material is a transparent heat thermosetting resin.
11. light-emitting diode (LED) backlight module as claimed in claim 8 is characterized in that, those light emitting diodes comprise wave band between 300 to 500nm light-emitting diode chip for backlight unit.
12. light-emitting diode (LED) backlight module as claimed in claim 11 is characterized in that, those diffusion particles comprise fluorophor.
13. light-emitting diode (LED) backlight module as claimed in claim 11 is characterized in that, those diffusion particles are yellow fluorophor.
14. light-emitting diode (LED) backlight module as claimed in claim 11 is characterized in that, those diffusion particles are redness and green-emitting phosphor.
15. light-emitting diode (LED) backlight module as claimed in claim 1 is characterized in that, other comprises a reflecting layer, is located on this circuit board.
16. light-emitting diode (LED) backlight module as claimed in claim 15 is characterized in that, this reflecting layer is for directly being coated with the reflection material that invests on this circuit board.
17. light-emitting diode (LED) backlight module as claimed in claim 1 is characterized in that, other comprises a prism microstructure.
18. light-emitting diode (LED) backlight module as claimed in claim 17 is characterized in that, this prism microstructure directly moulds on this diffusion material.
19. light-emitting diode (LED) backlight module as claimed in claim 1 is characterized in that, this circuit board is a metallic core circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101674459A CN101144582A (en) | 2007-10-25 | 2007-10-25 | Light-emitting diode backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101674459A CN101144582A (en) | 2007-10-25 | 2007-10-25 | Light-emitting diode backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101144582A true CN101144582A (en) | 2008-03-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101674459A Pending CN101144582A (en) | 2007-10-25 | 2007-10-25 | Light-emitting diode backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101144582A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014040306A1 (en) * | 2012-09-11 | 2014-03-20 | 深圳市华星光电技术有限公司 | Direct-lit backlight module |
| CN107420781A (en) * | 2017-08-23 | 2017-12-01 | 中山市龙舜电气科技有限公司 | A kind of light bar and its manufacture method with fluorescent effect |
| CN107861291A (en) * | 2017-10-24 | 2018-03-30 | 华为技术有限公司 | Backlight module, display screen and terminal |
| CN108153049A (en) * | 2017-12-29 | 2018-06-12 | 宁波东辉光电科技有限公司 | A kind of direct-type backlight optical diaphragm structure |
| CN108227300A (en) * | 2017-12-29 | 2018-06-29 | 宁波东辉光电科技有限公司 | A kind of direct-type backlight optical texture |
| CN109119523A (en) * | 2018-10-09 | 2019-01-01 | 大连德豪光电科技有限公司 | The preparation method of backlight, liquid crystal display and backlight |
| CN110658650A (en) * | 2018-06-28 | 2020-01-07 | 群创光电股份有限公司 | Display device |
| WO2020029534A1 (en) * | 2018-08-09 | 2020-02-13 | 大连德豪光电科技有限公司 | Backlight source and liquid crystal display |
| CN112099264A (en) * | 2020-09-14 | 2020-12-18 | 深圳市隆利科技股份有限公司 | Optical film and direct type backlight module applying same |
| CN112447897A (en) * | 2019-09-03 | 2021-03-05 | 李家铭 | RGB light-emitting diode module with shading film |
| CN113238409A (en) * | 2021-05-27 | 2021-08-10 | 业成科技（成都）有限公司 | Light source structure, backlight module and display device |
-
2007
- 2007-10-25 CN CNA2007101674459A patent/CN101144582A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014040306A1 (en) * | 2012-09-11 | 2014-03-20 | 深圳市华星光电技术有限公司 | Direct-lit backlight module |
| CN107420781A (en) * | 2017-08-23 | 2017-12-01 | 中山市龙舜电气科技有限公司 | A kind of light bar and its manufacture method with fluorescent effect |
| US10901263B2 (en) | 2017-10-24 | 2021-01-26 | Huawei Technologies Co., Ltd. | Backlight module, display screen, and terminal |
| CN107861291A (en) * | 2017-10-24 | 2018-03-30 | 华为技术有限公司 | Backlight module, display screen and terminal |
| CN115963661A (en) * | 2017-10-24 | 2023-04-14 | 华为技术有限公司 | Backlight module, display screen and terminal |
| CN108153049A (en) * | 2017-12-29 | 2018-06-12 | 宁波东辉光电科技有限公司 | A kind of direct-type backlight optical diaphragm structure |
| CN108227300A (en) * | 2017-12-29 | 2018-06-29 | 宁波东辉光电科技有限公司 | A kind of direct-type backlight optical texture |
| CN110658650A (en) * | 2018-06-28 | 2020-01-07 | 群创光电股份有限公司 | Display device |
| WO2020029534A1 (en) * | 2018-08-09 | 2020-02-13 | 大连德豪光电科技有限公司 | Backlight source and liquid crystal display |
| US11320695B2 (en) | 2018-08-09 | 2022-05-03 | Elec-Tech Photoelectric Technology (Dalian) Co., Ltd. | Backlight and liquid crystal display |
| CN109119523A (en) * | 2018-10-09 | 2019-01-01 | 大连德豪光电科技有限公司 | The preparation method of backlight, liquid crystal display and backlight |
| CN112447897A (en) * | 2019-09-03 | 2021-03-05 | 李家铭 | RGB light-emitting diode module with shading film |
| CN112099264A (en) * | 2020-09-14 | 2020-12-18 | 深圳市隆利科技股份有限公司 | Optical film and direct type backlight module applying same |
| CN113238409A (en) * | 2021-05-27 | 2021-08-10 | 业成科技（成都）有限公司 | Light source structure, backlight module and display device |
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Open date: 20080319 |