CN101498424A - High efficient three-wavelength backlight module - Google Patents
High efficient three-wavelength backlight module Download PDFInfo
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- CN101498424A CN101498424A CNA2008100038889A CN200810003888A CN101498424A CN 101498424 A CN101498424 A CN 101498424A CN A2008100038889 A CNA2008100038889 A CN A2008100038889A CN 200810003888 A CN200810003888 A CN 200810003888A CN 101498424 A CN101498424 A CN 101498424A
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Abstract
The invention relates to a high-efficiency three-wavelength backlight module which comprises an optical bedded structure, a double-color light light-emitting diode module and a red light fluorescence layer, wherein the optical bedded structure spreads and diffuses point and line light sources to form a bedded structure output by a face light source; the double-color light light-emitting diode module generates and outputs blue and green light to the optical bedded structure; and the red light fluorescence layer is in a thin layer shape, and is formed on an output path of the face light source of the optical bedded structure. Because the invention adopts the blue and green light light-emitting diodes having similar service life as the light source, the output of each color light is fairly stable even if the backlight module is used for a long time.
Description
Technical field
The invention relates to a kind of backlight module, especially about a kind of high efficiency backlight module that utilizes light emitting diode to produce the three primary colors wavelength light.
Background technology
Flat-panel screens is held its display technology evolution demand that can satisfy simultaneously gently, approach under the arm and is propagated its belief on a large scale.The kind of flat-panel screens is a lot, main as Organic Light Emitting Diode display (OLED), Thin Film Transistor-LCD (TFTLCD), Field Emission Display (FED) and plasma display (PDP) etc., though various display all has its strong point or shortcoming, so can be described as current main-stream with TFTLCD at present.TFTLCD is unique non-self luminous display in the aforesaid all kinds of flat-panel screens, and it produces light output and must just can effectively show by a backlight module.Early stage backlight module, mainly comprise a cold cathode fluorescent lamp pipe (CCFL) and the line source that fluorescent lamp produces is exported the plural layer optics layer structure that forms even distribution area source, described optics layer structure comprises: brightness enhancement film, diffusion sheet or LGP ... etc.Yet it has bulky, power consumption and the not good problem of colour gamut with the backlight module of CCFL fluorescent tube made, and therefore, the light source of advanced backlight module is comparatively replaced by light emitting diode (LED) gradually at present.
Generally speaking, can be haply as the diode light-source of backlight module and be divided into white light emitting diode and three coloured light light emitting diodes, two classes.Wherein, the white-light emitting principle of white light emitting diode is to drive the sodium yellow phosphor powder with a blue-ray LED, and form white light output with the gold-tinted of blue light sodium yellow phosphor powder generation, yet, quite faint with the white light that the blue light gold-tinted produces because of the luminous intensity of green glow, ruddiness, when causing it as the light source of backlight module, behind the colored filter by LCD, it is not enough and influence the color saturation of display to export the green glow of human eye and ruddiness to, therefore, three coloured light light emitting diodes are present main flows as the backlight module light source.Three coloured light light emitting diodes comprise three kinds of light emitting diodes that can produce different color light output, the light output that every kind of light emitting diode produces different wave length respectively (for example, blue, green, red) and mix the formation white light, because the emission wavelength of three coloured light light emitting diodes can select different diodes to finely tune, therefore, with three coloured light light emitting diodes as the LCD of backlight module light source except having perfect colour gamut performance performance, also solve fully and overcome aforementioned CCFL, the variety of problems of the backlight module of white light emitting diode.
Yet,, after permanent the use, produce the problem of variable color probably with the LCD of three coloured light light emitting diodes as light source.Its reason is, three coloured light light emitting diodes are formed with the light emitting diode of red, blue, the green three kinds outputs of not sharing the same light, wherein, the compound semiconductor of binary, ternary or quaternary that blueness and green LED mainly with gallium nitride (GaN) are is formed, therefore its service life and light output performance can be mated haply, but red light-emitting diode but needs just can export ruddiness with the compound semiconductor that GaAs (GaAs) is.Because the relation of material behavior, quite big difference is arranged the overall service life of present ruddiness and blue-green light LED, therefore, when the three coloured light light emitting diodes that adopt three kinds of ruddiness, green glow and blue light-emitting diode combination after long-term use, red light-emitting diode is often very fast because of the rate of decay, causes LCD output color to modify tone.
Summary of the invention
For solve aforementioned with three coloured light light emitting diodes as the LCD of light source after long-term the use, because the problem that lifetime of LED differs and causes LCD output color to modify tone, the indigo plant that the present invention desires only to adopt luminescent lifetime to mate mutually, green light LED are as light source, cooperate the ruddiness phosphor powder that can produce red light output again and the light output that reaches three-wavelength, to reach advantage of possessing present three coloured light light emitting diodes and the purpose that solves its shortcoming.
The invention provides a kind of high efficient three-wavelength backlight module, it comprises:
One optics layer structure, it evenly launches point, line source to diffuse to form the layer structure of area source output;
One bi-coloured light light-emitting diode (LED) module, it produces blue and green light exports described optics layer structure to; And
One ruddiness fluorescent bisque, it is lamelliform, and is formed on the area source outgoing route of described optics layer structure.
Wherein, described optics layer structure comprises a LGP, a diffusion sheet and the brightness enhancement film that mutual stratiform stacks.
Wherein, described bi-coloured light light-emitting diode (LED) module comprises a plurality of blue light-emitting diodes and a plurality of green light LED.
Further, the light outgoing route of described bi-coloured light light-emitting diode (LED) module is corresponding to all sides of described optics layer structure.
Further, the light outgoing route of described bi-coloured light light-emitting diode (LED) module is corresponding to a lower surface of described optics layer structure.
Whereby, the present invention has following advantage:
1. adopt approaching indigo plant in service life, green light LED as light source, even after making the permanent use of backlight module, the output quite stable of each coloured light.
2. part output CD-ROM drive blue, green light LED makes red fluorescent powder produce ruddiness output, the output of blue light and green glow of arranging in pairs or groups again can form the area source output of three-wavelength, and the light output of three kinds of different wave lengths can make the light output efficiency of LCD be improved through the colored filter of LCD.
3. because the light source of backlight module is still light emitting diode, therefore, can reach the effect of weight saving, the saving energy.
Description of drawings
Fig. 1 is the stereogram of preferred embodiment of the present invention.
Fig. 2 is the side view of preferred embodiment of the present invention.
Fig. 3 is the vertical view of preferred embodiment of the present invention.
Fig. 4 is the stereogram of another preferred embodiment of the present invention.
Fig. 5 is the side view of another preferred embodiment of the present invention.
Fig. 6 is the vertical view of another preferred embodiment of the present invention.
Drawing reference numeral
10 optics layer structures
20 bi-coloured light light-emitting diode (LED) modules
22 blue light-emitting diodes
24 green light LEDs
30 ruddiness fluorescent bisques
The specific embodiment
Please refer to Fig. 1, Fig. 2 and Fig. 3, Fig. 1, Fig. 2 and Fig. 3 are high efficient three-wavelength backlight module preferred embodiment of the present invention, and it comprises an optics layer structure 10, a bi-coloured light light-emitting diode (LED) module 20 and a ruddiness fluorescent bisque 30.
Described optics layer structure 10 is one point, line source evenly can be launched diffuse to form the stratiform stacking structure of area source output, and it can comprise a LGP (light guide), diffusion sheet (diffuser), the brightness enhancement film (Brightness Enhancement Film) that stacks mutually ... wait the optical function synusia.
Described bi-coloured light light-emitting diode (LED) module 20 comprises a plurality of blue light-emitting diodes 22 and a plurality of green light LED 24 that is staggeredly placed, it places all sides or the bottom surface of described optics layer structure 10, and makes the one light-emitting area towards described optics layer structure 10.The bi-coloured light light-emitting diode (LED) module 20 of this preferred embodiment places the corresponding dual-side of described optics layer structure 10, after the bi-coloured light output of described bi-coloured light light-emitting diode (LED) module 20 generations enters described optics layer structure 10, described optics layer structure 10 forms an area source in the end face surface of described optics layer structure 10 and exports after light output is evenly spread, adjusted outbound course.
Described ruddiness fluorescent bisque 30 is the thin layers that form or be coated with on the area source outgoing route that invests optical layers shape structure 10, it can be coated with the end face that invests LGP, the surface of diffusion sheet, the positions such as surface of brightness enhancement film, and the ruddiness fluorescent bisque 30 of this preferred embodiment is coated with the end face surface that invests described optics layer structure 10.
So, after blue and green output light input to described optics layer structure 10 by described blue light-emitting diode 22 and green light LED 24 respectively, mixing the output light of blue and green light wave exports and formation blue-green area source towards the top surface of described optics layer structure 10, after the described ruddiness fluorescent bisque 30 of blue-green area source process, the excitated red fluorescent bisque 30 of the local energy of blue-green area source and make red fluorescent powder layer 30 produce red light output, therefore, can form a white light area source in corresponding position in the table top surface face of described optics layer structure 10, because the light energy of described white light area source is mainly exported (blue light by the coloured light of three different wave lengths, green light, red light) forms, so, can improve the color saturation of display when white light area source during as the light source of LCD.
Further, please refer to Fig. 4 to Fig. 6, described bi-coloured light light-emitting diode (LED) module 20 also can be located at the bottom of described optics layer structure 10, and makes its light-emitting area towards described optics layer structure 10, and forms the backlight module of a straight-down negative.
Claims (5)
1. a high efficient three-wavelength backlight module is characterized in that, described high efficient three-wavelength backlight module comprises:
One optics layer structure, described optics layer structure are evenly launched point, line source to diffuse to form the layer structure of area source output;
One bi-coloured light light-emitting diode (LED) module, described bi-coloured light light-emitting diode (LED) module produce blue and green light exports described optics layer structure to; And
One ruddiness fluorescent bisque, described ruddiness fluorescent bisque is lamelliform, and is formed on the area source outgoing route of described optics layer structure.
2. high efficient three-wavelength backlight module as claimed in claim 1 is characterized in that, described optics layer structure comprises a LGP, a diffusion sheet and the brightness enhancement film that mutual stratiform stacks.
3. high efficient three-wavelength backlight module as claimed in claim 1 or 2 is characterized in that, described bi-coloured light light-emitting diode (LED) module comprises a plurality of blue light-emitting diodes and a plurality of green light LED.
4. high efficient three-wavelength backlight module as claimed in claim 3 is characterized in that, the light outgoing route of described bi-coloured light light-emitting diode (LED) module is corresponding to all sides of described optics layer structure.
5. high efficient three-wavelength backlight module as claimed in claim 3 is characterized in that, the light outgoing route of described bi-coloured light light-emitting diode (LED) module is corresponding to a lower surface of described optics layer structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100038889A CN101498424A (en) | 2008-01-28 | 2008-01-28 | High efficient three-wavelength backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100038889A CN101498424A (en) | 2008-01-28 | 2008-01-28 | High efficient three-wavelength backlight module |
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| CN101498424A true CN101498424A (en) | 2009-08-05 |
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| CNA2008100038889A Pending CN101498424A (en) | 2008-01-28 | 2008-01-28 | High efficient three-wavelength backlight module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676288A (en) * | 2012-09-10 | 2014-03-26 | 宏腾光电股份有限公司 | Wide color gamut membrane, manufacturing method thereof and display device with wide color gamut membrane |
| CN107894679A (en) * | 2017-12-29 | 2018-04-10 | 西安智盛锐芯半导体科技有限公司 | Backlight module and liquid crystal display device |
| CN108051951A (en) * | 2017-12-29 | 2018-05-18 | 西安智盛锐芯半导体科技有限公司 | LED light source, backlight module and liquid crystal display device |
| CN110047825A (en) * | 2019-04-29 | 2019-07-23 | 广西师范大学 | It is a kind of can bluish-green two waveband excitated red fluorescent powder White-light LED package structure and illumination mode |
-
2008
- 2008-01-28 CN CNA2008100038889A patent/CN101498424A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676288A (en) * | 2012-09-10 | 2014-03-26 | 宏腾光电股份有限公司 | Wide color gamut membrane, manufacturing method thereof and display device with wide color gamut membrane |
| CN107894679A (en) * | 2017-12-29 | 2018-04-10 | 西安智盛锐芯半导体科技有限公司 | Backlight module and liquid crystal display device |
| CN108051951A (en) * | 2017-12-29 | 2018-05-18 | 西安智盛锐芯半导体科技有限公司 | LED light source, backlight module and liquid crystal display device |
| CN107894679B (en) * | 2017-12-29 | 2023-01-10 | 苏州九骏电子科技有限公司 | Backlight module and liquid crystal display device |
| CN110047825A (en) * | 2019-04-29 | 2019-07-23 | 广西师范大学 | It is a kind of can bluish-green two waveband excitated red fluorescent powder White-light LED package structure and illumination mode |
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Open date: 20090805 |