CN201242640Y - Liquid crystal display backlight module - Google Patents
Liquid crystal display backlight module Download PDFInfo
- Publication number
- CN201242640Y CN201242640Y CNU2008200124875U CN200820012487U CN201242640Y CN 201242640 Y CN201242640 Y CN 201242640Y CN U2008200124875 U CNU2008200124875 U CN U2008200124875U CN 200820012487 U CN200820012487 U CN 200820012487U CN 201242640 Y CN201242640 Y CN 201242640Y
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- light
- fluorescent material
- backlight module
- light source
- blue
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Abstract
The utility model relates to a liquid crystal display backlight module which comprises a light source, a reflecting plate, a light guiding plate, a fluorescent material light conversion film, a diffusion plate and a brightening film; wherein the fluorescent material light conversion film is positioned between the light guiding plate and the diffusion plate. The liquid crystal display backlight module can adopt a sidelight type structure or a direct downward type structure. The light source can be a blue luminous cold cathode fluorescent tube, a blue luminous light emitting diode or an ultraviolet light luminous light emitting diode. The fluorescent material in the fluorescent material light conversion film can be a mixture of fluorescent material which can be excitated by a blue light source to emit yellow light, fluorescent material which can be excitated by a blue light source to emit green light and red luminous fluorescent material, and the mixture of fluorescent material which can be excitated by an ultraviolet light luminous LED light source to emit blue light, green luminous fluorescent material and red luminous fluorescent material. The liquid crystal display backlight module has the advantages that the liquid crystal display backlight module can provide a white illumination light source, and is high in illumination efficiency, long in service life, even in radiation and low in cost.
Description
Technical field
The utility model relates to a kind of module backlight, is specifically related to a kind of module backlight that the white illumination light source can be provided for the LCD LCD, belongs to optoelectronics and new material application.
Background technology
Module backlight (Back light module) is one of key part and component of panel of LCD (LCD panel), because liquid crystal itself is not luminous, the function of module backlight promptly is well-off brightness and the light source that is evenly distributed, and makes its normally show image.The LCD panel now has been widely used in the electronic product of tool growth potentiality such as monitor, mobile computer, digital camera and projector, and the demand that therefore drives module backlight continues to grow up.
In the prior art, adopt the LCD backlight module of cold cathode fluorescent tube as light source, advantage is the brightness height, and shortcoming is to need the high-voltage power supply and the color rendering of high pressure relatively poor; Adopt the LCD backlight module of LED as light source, advantage is that colour gamut is wide, the life-span is long, and shortcoming is that cost is higher.
LCD backlight module of the present utility model is that invent at the deficiencies in the prior art a kind of can provide white illumination light source, luminescence efficiency height, long service life, luminous even, lower-cost LCD backlight module.
Summary of the invention
The purpose of this utility model provides and a kind ofly can realize white illumination light source, luminescence efficiency height, long service life, luminous even, lower-cost LCD backlight module.
In order to reach this purpose, the utility model provides following technical scheme: a kind of LCD backlight module, comprise: light source, reflecting plate, light guide plate, fluorescent material light conversion film, diffuser plate, brightness enhancement film, the fluorescent material light conversion film is between light guide plate and diffuser plate.
According to the LCD backlight module technical scheme of a kind of preferred version of the present utility model, the laminar film that employed fluorescent material light conversion film is made up of fluorescent material and transparent organic resin material.
According to the LCD backlight module technical scheme of a kind of preferred version of the present utility model, employed light source is cold cathode fluorescent tube (CCFL).
According to the LCD backlight module technical scheme of a kind of preferred version of the present utility model, employed light source is light emitting diode (LED).
According to the LCD backlight module technical scheme of a kind of preferred version of the present utility model, the fluorescent material in the employed fluorescent material light conversion film is to be subjected to can sending the Yellow luminous fluorescent material that the emission spectrum peak wavelength is positioned at 530～560nm scope behind the light source activation.
According to the LCD backlight module technical scheme of a kind of preferred version of the present utility model, the fluorescent material in the employed fluorescent material light conversion film is to be subjected to can sending behind the light source activation emission spectrum peak wavelength to be positioned at the green emitting fluorescent material of 500～530nm scope and to be subjected to can sending the mixture that the emission spectrum peak wavelength is positioned at the emitting red light fluorescent material of 580～630nm scope behind the light source activation.
According to the LCD backlight module technical scheme of a kind of preferred version of the present utility model, the fluorescent material in the employed fluorescent material light conversion film is can send the Emission Spectrum Peals wavelength after being subject to ultraviolet source and exciting to be positioned at the blue-light-emitting fluorescent material of 450～470nm scope and to be subject to ultraviolet source can the Emission Spectrum Peals wavelength to be positioned at the green emitting fluorescent material of 500～530nm scope and to be subject to ultraviolet source after exciting and can send the mixture that the Emission Spectrum Peals wavelength is positioned at the emitting red light fluorescent material of 580～630nm scope after exciting.
According to the LCD backlight module technical scheme of a kind of preferred version of the present utility model, employed light source is the cold cathode fluorescent tube (CCFL) of blue-light-emitting.
According to the LCD backlight module technical scheme of a kind of preferred version of the present utility model, employed light source is the light emitting diode (LED) of blue-light-emitting.
According to the LCD backlight module technical scheme of a kind of preferred version of the present utility model, employed light source is the light emitting diode (LED) of UV-light luminous.
Owing to use above-mentioned structure, the fluorescent material in the fluorescent material light conversion film is subjected to from exciting of light source and luminous and go out white luminous with light source luminous compound.
When light source is the light emitting diode of the cold cathode fluorescent tube of blue-light-emitting or blue-light-emitting, brightness and chromaticity coordinates according to blue-light-emitting, according to the brightness and the chromaticity coordinates of required synthetic white light, the fluorescent material light conversion film of selecting for use the Yellow luminous fluorescent material of suitable wavelength and ratio to make.Fluorescent material in the fluorescent material light conversion film is subjected to blue-light excitedly sending Yellow luminously, goes out white light with remaining blue-light-emitting is compound again.
When light source is the light emitting diode of the cold cathode fluorescent tube of blue-light-emitting or blue-light-emitting, also can be according to the brightness and the chromaticity coordinates of blue-light-emitting, according to the brightness and the chromaticity coordinates of required synthetic white light, select for use the fluorescent material of the fluorescent material of green emitting of suitable wavelength and ratio and emitting red light to mix and make the fluorescent material light conversion film.Fluorescent material in the fluorescent material light conversion film is subjected to blue-light excited green and the emitting red light of sending, and goes out white light with remaining blue-light-emitting is compound again.
When light source is the light emitting diode of the cold cathode fluorescent tube of UV-light luminous or blue-light-emitting, also can be according to the brightness of UV-light luminous, according to the brightness and the chromaticity coordinates of required synthetic white light, select for use the fluorescent material of the fluorescent material of fluorescent material, green emitting of the blue-light-emitting of suitable wavelength and ratio and emitting red light to mix and make the fluorescent material light conversion film.Fluorescent material in the fluorescent material light conversion film is subjected to ultraviolet excitation and sends blueness, green and emitting red light, compoundly goes out white light.
Owing to used the fluorescent material light conversion film, compared with prior art, no matter light source is cold cathode fluorescent tube (CCFL), or light emitting diode (LED), all can realize the white light of LCD backlight module by the monochromatic light of blueness.White luminous cold cathode fluorescent tube will use three primary colors fluorescent powder; White luminous light emitting diode will use three kinds of chips of red, green, blue.The cost of the light emitting diode (LED) of blue cold cathode fluorescent tube (CCFL) and blue-light-emitting all is lower than white luminous cold cathode fluorescent tube and light emitting diode.
Description of drawings
Fig. 1 is the utility model embodiment 1 described LCD backlight modular structure figure;
Fig. 2 is the utility model embodiment 2 described LCD backlight modular structure figure.
Accompanying drawing number:
1-brightness enhancement film;
2-fluorescent material light conversion film;
3-light guide plate;
4-reflecting plate;
5-light source;
6-diffuser plate.
Embodiment
Below with embodiment the utility model is described further.Specific embodiment of the utility model is referring to accompanying drawing.
Embodiment 1:
Fig. 1 is first embodiment of the present utility model, is the structural representation of side-light type module backlight.This LCD backlight module comprises light source, reflecting plate, light guide plate, fluorescent material light conversion film, diffuser plate, brightness enhancement film, and light source is positioned at the side of light guide plate, and the fluorescent material light conversion film is between light guide plate and diffusion barrier.Wherein light source can be the blue-light-emitting cold cathode fluorescent tube, also can be blue-light-emitting LED, also can be the LED of UV-light luminous.The light source design of its side incident has the characteristic of light, slim, narrow frameization, low power consumption.
Embodiment 2:
Fig. 2 is first embodiment of the present utility model, is the structural representation of down straight aphototropism mode set.This LCD backlight module comprises light source, reflecting plate, light guide plate, fluorescent material light conversion film, diffuser plate, brightness enhancement film, light source be positioned at light guide plate below, the fluorescent material light conversion film is between light guide plate and diffusion barrier.Wherein light source can be the blue-light-emitting cold cathode fluorescent tube, also can be blue-light-emitting LED, also can be the LED of UV-light luminous.Thickness, weight, power consumption, its advantage that the structure of down straight aphototropism mode set has increased module is high briliancy, good bright dipping visual angle, light utilization ratio height, simple structureization etc.
Embodiment 3-5:
The LCD backlight modular structure of embodiment 3-5 is a side-light type module backlight with embodiment 1, and the fluorescent material kind in wherein light source selection, light source luminescent color, the fluorescent material conversion film sees Table 1, and the glow color of embodiment 3-5 is white.
Table 1
Embodiment 6-8:
The LCD backlight modular structure of embodiment 6-8 is a down straight aphototropism mode set with embodiment 2, and the fluorescent material kind in wherein light source selection, light source luminescent color, the fluorescent material conversion film and the glow color of LCD backlight mould see Table 2.
Table 2
LCD backlight module of the present utility model can be realized the white illumination light source, has luminous efficiency Height, long service life, luminous evenly, the advantage such as cost is lower.
Claims (10)
1. LCD backlight module, comprise: light source, reflecting plate, light guide plate, diffuser plate, brightness enhancement film is characterized in that: one deck fluorescent material light conversion film is arranged between light guide plate and diffuser plate.
2. LCD backlight module according to claim 1 is characterized in that the laminar film that described fluorescent material light conversion film is made up of fluorescent material and transparent organic resin material.
3. LCD backlight module according to claim 1 is characterized in that described light source is a cold cathode fluorescent tube.
4. LCD backlight module according to claim 1 is characterized in that described light source is a light emitting diode.
5. LCD backlight module according to claim 2 is characterized in that fluorescent material in the described fluorescent material light conversion film is can send the Yellow luminous fluorescent material that the emission spectrum peak wavelength is positioned at 530～560nm scope after being subjected to blue-light source and exciting.
6. LCD backlight module according to claim 2 is characterized in that fluorescent material in the described fluorescent material light conversion film is can send the emission spectrum peak wavelength after being subjected to blue-light source and exciting to be positioned at the green emitting fluorescent material of 500～530nm scope and to be subjected to can sending the mixture that the emission spectrum peak wavelength is positioned at the emitting red light fluorescent material of 580～630nm scope behind the light source activation.
7. LCD backlight module according to claim 2 is characterized in that fluorescent material in the described fluorescent material light conversion film is can send the emission spectrum peak wavelength after being subjected to ultraviolet source and exciting to be positioned at the blue-light-emitting fluorescent material of 450～470nm scope and to be subjected to ultraviolet source can the emission spectrum peak wavelength to be positioned at the green emitting fluorescent material of 500～530nm scope and to be subjected to ultraviolet source after exciting and can send the mixture that the emission spectrum peak wavelength is positioned at the emitting red light fluorescent material of 580～630nm scope after exciting.
8. LCD backlight module according to claim 1 is characterized in that described light source is the cold cathode fluorescent tube of blue-light-emitting.
9. LCD backlight module according to claim 1 is characterized in that described light source is the light emitting diode of blue-light-emitting.
10. LCD backlight module according to claim 1 is characterized in that described light source is the light emitting diode of UV-light luminous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200124875U CN201242640Y (en) | 2008-04-30 | 2008-04-30 | Liquid crystal display backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200124875U CN201242640Y (en) | 2008-04-30 | 2008-04-30 | Liquid crystal display backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201242640Y true CN201242640Y (en) | 2009-05-20 |
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ID=40715929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200124875U Expired - Lifetime CN201242640Y (en) | 2008-04-30 | 2008-04-30 | Liquid crystal display backlight module |
Country Status (1)
| Country | Link |
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| CN (1) | CN201242640Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095132A (en) * | 2010-11-30 | 2011-06-15 | 中航华东光电有限公司 | Side-light type LED (light emitting diode) backlight architecture with high redundancy rate |
| CN102353015A (en) * | 2011-07-19 | 2012-02-15 | 彩虹集团公司 | Light-emitting diode (LED) excited surface light source device and method |
| CN102466170A (en) * | 2010-11-11 | 2012-05-23 | 展晶科技(深圳)有限公司 | Backlight module |
| CN102803821A (en) * | 2009-06-15 | 2012-11-28 | 夏普株式会社 | Illuminating device, display device, and television receiver |
| CN102803822A (en) * | 2009-06-15 | 2012-11-28 | 夏普株式会社 | Illuminating device, display device, and television receiver |
| CN103343943A (en) * | 2013-05-08 | 2013-10-09 | 深圳市华星光电技术有限公司 | Backlight module of display device and white light LED |
| CN104019401A (en) * | 2013-02-28 | 2014-09-03 | 联想(北京)有限公司 | Backlight modules, double-display-screen structure and electronic equipment |
| CN104654141A (en) * | 2015-03-18 | 2015-05-27 | 京东方科技集团股份有限公司 | Backlight module and display device |
| WO2015074202A1 (en) * | 2013-11-20 | 2015-05-28 | 华为终端有限公司 | Liquid crystal module and electronic device |
| CN114203033A (en) * | 2021-11-16 | 2022-03-18 | 深圳市高展光电有限公司 | Prevent blue light display screen subassembly |
| CN115236897A (en) * | 2022-08-03 | 2022-10-25 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
-
2008
- 2008-04-30 CN CNU2008200124875U patent/CN201242640Y/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8976316B2 (en) | 2009-06-15 | 2015-03-10 | Sharp Kabushiki Kaisha | Lighting device, display device and television receiver |
| CN102803821A (en) * | 2009-06-15 | 2012-11-28 | 夏普株式会社 | Illuminating device, display device, and television receiver |
| CN102803822A (en) * | 2009-06-15 | 2012-11-28 | 夏普株式会社 | Illuminating device, display device, and television receiver |
| CN102466170A (en) * | 2010-11-11 | 2012-05-23 | 展晶科技(深圳)有限公司 | Backlight module |
| CN102095132B (en) * | 2010-11-30 | 2012-09-19 | 中航华东光电有限公司 | Side-light type LED (light emitting diode) backlight architecture with high redundancy rate |
| CN102095132A (en) * | 2010-11-30 | 2011-06-15 | 中航华东光电有限公司 | Side-light type LED (light emitting diode) backlight architecture with high redundancy rate |
| CN102353015A (en) * | 2011-07-19 | 2012-02-15 | 彩虹集团公司 | Light-emitting diode (LED) excited surface light source device and method |
| CN104019401A (en) * | 2013-02-28 | 2014-09-03 | 联想(北京)有限公司 | Backlight modules, double-display-screen structure and electronic equipment |
| CN103343943A (en) * | 2013-05-08 | 2013-10-09 | 深圳市华星光电技术有限公司 | Backlight module of display device and white light LED |
| WO2015074202A1 (en) * | 2013-11-20 | 2015-05-28 | 华为终端有限公司 | Liquid crystal module and electronic device |
| CN105264432A (en) * | 2013-11-20 | 2016-01-20 | 华为终端有限公司 | Liquid crystal module and electronic device |
| US9857524B2 (en) | 2013-11-20 | 2018-01-02 | Huawei Device (Dongguan) Co., Ltd. | Liquid crystal module and electronic device |
| CN105264432B (en) * | 2013-11-20 | 2018-05-04 | 华为终端（东莞）有限公司 | A kind of liquid crystal module and electronic equipment |
| CN104654141A (en) * | 2015-03-18 | 2015-05-27 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN114203033A (en) * | 2021-11-16 | 2022-03-18 | 深圳市高展光电有限公司 | Prevent blue light display screen subassembly |
| CN114203033B (en) * | 2021-11-16 | 2023-09-08 | 深圳市高展光电有限公司 | Blue light prevention display screen assembly |
| CN115236897A (en) * | 2022-08-03 | 2022-10-25 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 116025 No. 32, high energy street, Dalian hi tech Zone, Dalian, Liaoning Patentee after: Dalian Luming Light Emitting Sci-Tech Co., Ltd. Address before: 116025 Liaoning Province, Dalian City High-tech Park Qixianling high-energy Street No. 1 Patentee before: Dalian Luming Light Emitting Sci-Tech Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090520 |