CN101655638A - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN101655638A CN101655638A CN200810141919A CN200810141919A CN101655638A CN 101655638 A CN101655638 A CN 101655638A CN 200810141919 A CN200810141919 A CN 200810141919A CN 200810141919 A CN200810141919 A CN 200810141919A CN 101655638 A CN101655638 A CN 101655638A
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- liquid crystal
- crystal indicator
- fluorescent tube
- ccfl
- backlight
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Abstract
The invention pertains to liquid crystal display field, The utility model relates to a liquid crystal display device, comprising a liquid crystal panel and a backlight system, the system comprises a plurality of CCFL lamp tube groups, each group has at least two different lamp tubes. The invention increases backlight spectral line width by increasing luminescent sources of other spectral line different from that of red, green and blue light, has backlight source with wide spectrum, thereby showing approximate real color of natural object, to make it comfortable to observe.
Description
Technical field
The invention belongs to the demonstration field, relate in particular to a kind of liquid crystal indicator.
Background technology
The residing occurring in nature of people, the spectrum of the visible light by the observed object of eyes is that enrich and continuous often.And the light that adopts common CCFL liquid crystal indicator backlight, backlight to send but is discontinuous several limited spectral coverage.The color that we see from the LCD TV is the result who above-mentioned discontinuous spectral coverage is carried out colour mixture, this method is a kind for the treatment of method that the colour of complexity is simplified, it can only reappear the color of original scenery basically, and bigger difference being arranged on the spectral composition composition with the color of actual object, Fig. 1, Fig. 2, Fig. 3 have shown the natural forms reflectance spectrum of same color and the difference that liquid crystal indicator shows spectrum respectively.
Present LCD TV mostly is backlight with CCFL, and the luminous spectral line of the TV under this form cannot not be abundant that spectral component is abundant more usually, just more near natural colour.And the spectral bandwidth of liquid crystal indicator CCFL backlight will be well below the color mixture curve of display primary, this spectral line color of simulating the half-peak breadth broad with the narrower color of spectral line half-peak breadth can cause the distortion of liquid crystal indicator color of image, presented green or red excessively color in the time of a lot, though very wide of the colour gamut of liquid crystal indicator backlight color, but the sense of reality of image is relatively poor, the physical environment that relatively adapts to successive line light with people is compared, and very big difference is arranged.
Therefore, provide a kind of method can make and had more near the image quality of object state of nature, can also improve the light efficiency of CCFI simultaneously, be necessary in fact for LCD backlight provides the spectral line of continuously abundant visible light, the image that liquid crystal indicator is shown with CCFL.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of spectral line backlight abundant liquid crystal indicator, makes the image of its demonstration have more image quality near the object state of nature.
The technical problem to be solved in the present invention is achieved in that provides a kind of liquid crystal indicator, comprises liquid crystal panel and back light system, and described back light system comprises a plurality of CCFL light tube group, and described each CCFL light tube group comprises at least two different fluorescent tubes.
Further improvement for liquid crystal indicator is that fluorescent tube is the colour mixture fluorescent tube.
Further improvement for liquid crystal indicator is that fluorescent tube is monochromatic fluorescent tube, and the color of described monochromatic fluorescent tube luminescent spectrum comprises the RGB bluish yellow.
The luminosity that further improves described luminous lamp tube group again for liquid crystal indicator is dynamically controlled according to the brightness needs of picture.
Compare existing liquid crystal indicator, liquid crystal indicator provided by the invention, the spectral line that its spectral line backlight is compared the available liquid crystal display device is horn of plenty more, approaches natural continuously full spectrum, thus the Natural color that makes the color of display system approach scenery more.Can better reduce or approach the true colors of nature scenery, in addition, the full spectrum of simulation of natural light is backlight to be that human eye adapts to most, and eyes are loosened, and is difficult for producing tired.
Description of drawings
Fig. 1 has shown that blue natural forms reflectance spectrum and liquid crystal indicator show spectral comparison figure;
Fig. 2 has shown that green natural forms reflectance spectrum and liquid crystal indicator show spectral comparison figure;
Fig. 3 has shown that red natural forms reflectance spectrum and liquid crystal indicator show spectral comparison figure;
Fig. 4 is the spectral profile curve of the backlight of a typical C CFL;
Fig. 5 is two permutation and combination figure that adopt two kinds of CCFL fluorescent tubes.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The purpose of this invention is to provide the abundant liquid crystal indicator of a spectral line backlight, in order to realize this purpose, to promote the width of spectral line backlight exactly, Fig. 4 is the spectral profile of typical C CFL, we as can be seen the energy of other spectral line except that the redgreenblue spectral line all be lower, the present invention realizes the increase of line width backlight by the light emitting source mode that increases other spectral line different with the redgreenblue spectral line.The specific embodiment of the present invention is by adopting the fluorescent powder that can make CCFL light send yellow and cyan spectral line to realize the increase of spectral line backlight.Be understandable that the mode that increases the backlight line width is not limited to increase the fluorescent powder of two kinds of spectral lines.
Multiple array mode is arranged when adopting multiple fluorescent powder to make CCFL:
One class all is coated on the inside of same CCFL fluorescent tube with the fluorescent powder of multiple spectral lines, and embodiments of the present invention are that the fluorescent powder with five kinds of spectral lines of RGB bluish yellow is coated in the CCFL fluorescent tube.The spectral line peak wavelength of cyan fluorescent powder is between 470～500nm, and the peak wavelength of the spectral line of yellow fluorescent powder is between 550～590nm.This mode is that benefit is any structure that does not change existing back light system.
Two classes are divided into several groups of inside that are coated on different CCFL fluorescent tubes respectively with the fluorescent powder of multiple spectral lines, make the colour mixture fluorescent tube, for example five kinds of spectral lines of RGB bluish yellow can be divided into two groups and are coated with, one group is that redgreenblue fluorescent powder is coated on a CCFL fluorescent tube inside, two groups is the fluorescent tube inside that two kinds of fluorescent powder of bluish yellow are coated on a CCFL, two colour mixture fluorescent tubes can both form white balance, and the dichromatism fluorescent tube is spaced during use.
The fluorescent powder of three class multiple spectral lines is coated on the inside of different CCFL fluorescent tubes respectively, each fluorescent tube all is monochromatic fluorescent tube, for example the fluorescent powder of five kinds of spectral lines of RGB bluish yellow is coated on respectively on five CCFL, five CCFL fluorescent tubes are arranged in order in use, the beneficial effect of the mode of this kind coating is to improve electro-optical efficiency, normally varicolored fluorescent powder is luminous at the same time in traditional CCFL fluorescent tube could produce white light, but because the thickness of coating and the excited state of taking into account different fluorescent powder, cause CCFL can't be operated on the best electro-optical efficiency point, and a CCFL only adopts a kind of spectral line fluorescent powder, this will work in optimum condition by each CCFL, helps improving whole electro-optical efficiency.
The permutation and combination of CCFL is not limited only to above-mentioned exemplifying, and also comprises the combination of monochromatic fluorescent tube and colour mixture fluorescent tube, as monochromatic fluorescent tube of RGB and the combination of bluish yellow colour mixture fluorescent tube.
When adopting CCFL fluorescent tube that different fluorescent powder distribute as backlight, can make up according to its characteristics of luminescence separately and actual the requirement, adopt the combination of two kinds of CCFL fluorescent tubes as shown in Figure 5, wherein a kind of is to adopt redgreenblue fluorescent powder fluorescent tube 20, and another kind of employing is bluish yellow fluorescent powder fluorescent tube 40, when straight-down negative distributes, we just can be according to its optical characteristics separately, luminous intensity and designing requirement decide every kind of fluorescent tube demand how much to carry out assembled arrangement, and determine its luminosity separately.
Can understand CCFL fluorescent tube provided by the invention or light tube group also can use in the luminous back light system of side.
Do not influence it for the lamp type that provides of the present invention and assembled arrangement mode thereof and utilize the dynamic backlight technology, reduce its power consumption and improve its contrast.
For overall dynamics mode backlight, the brightness of entire backlight light source just is unified the variation, its specific implementation method is exactly, we adjust brightness backlight according to current picture to demand backlight, revise the pixel data want display frame simultaneously, guarantee to have and do not have the not variation of brightness of observed picture under the dual mode of dynamic backlight.
For adopting monochromatic CCFL fluorescent tube as backlight, can adopt the dynamic backlight mode of branch color: we can have the CCFL of identical fluorescent powder as one group of independent controlled fluorescent tube, for example five CCFL have adopted five kinds of fluorescent powder of RGB bluish yellow respectively, so in this case we the CCFL of each color as one group of independent controlled lamp, but we can only obtain redgreenblue demand backlight according to image, just we can obtain the brightness demand of redgreenblue CCFL according to the demand of image, the brightness demand of bluish yellow CCFL just must get from redgreenblue, can obtain by following algorithm:
The brightness demand of cyan=(blue brightness demand+green brightness demand)/2;
Yellow brightness demand=(red brightness demand+green brightness demand)/2;
If when RGB all was 255, the bluish yellow that obtains so also was 255, can guarantee white balance like this, and when RGB all was 100, we can obtain blue or green and Huang all is 100, also can guarantee white balance.In indigo plant is 100, and red green when all being 0, then green grass or young crops is 50, and Huang is 0.
By the liquid crystal indicator that method of the present invention provides, the spectral line that its spectral line backlight is compared the available liquid crystal display device is horn of plenty more, approaches natural continuously full spectrum, thus the Natural color that makes the color of display system approach scenery more.Can better reduce or approach the true colors of nature scenery, in addition, the full spectrum of simulation of natural light is backlight to be that human eye adapts to most, and eyes are loosened, and is difficult for producing tired.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of liquid crystal indicator comprises liquid crystal panel and back light system, and described back light system comprises a plurality of CCFL fluorescent tubes, it is characterized in that: the curve of spectrum that described each CCFL fluorescent tube sends comprises 5 main peaks that spectral line is different at least.
2, liquid crystal indicator as claimed in claim 1 is characterized in that, one of them peak wavelength is at 550～590nm.
3, liquid crystal indicator as claimed in claim 1 or 2 is characterized in that, one of them peak wavelength is at 470～500nm.
4, liquid crystal indicator as claimed in claim 1 is characterized in that, the luminosity of described luminous lamp tube is dynamically controlled according to the brightness needs of picture.
5, a kind of liquid crystal indicator comprises liquid crystal panel and back light system, and described back light system comprises a plurality of CCFL light tube group, it is characterized in that: described each CCFL light tube group comprises the fluorescent tube of at least two different spectrum.
6, liquid crystal indicator as claimed in claim 5 is characterized in that, described fluorescent tube is the colour mixture fluorescent tube.
7, liquid crystal indicator as claimed in claim 5 is characterized in that, described fluorescent tube is monochromatic fluorescent tube.
8, liquid crystal indicator as claimed in claim 7 is characterized in that, the color of described monochromatic fluorescent tube luminescent spectrum comprises the RGB bluish yellow.
9, liquid crystal indicator as claimed in claim 5 is characterized in that, the luminosity of described luminous lamp tube group is dynamically controlled according to the brightness needs of picture.
10, liquid crystal indicator as claimed in claim 8, it is characterized in that, the luminosity of luminous lamp tube is dynamically controlled according to the brightness needs of picture, wherein the luminosity demand of red, green, blue three-colour light-emitting fluorescent tube determines that according to the brightness needs of picture the luminosity of other luminous lamp tube is got the average of two colour brightnesses that are adjacent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101419197A CN101655638B (en) | 2008-08-19 | 2008-08-19 | Liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101419197A CN101655638B (en) | 2008-08-19 | 2008-08-19 | Liquid crystal display device |
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| Publication Number | Publication Date |
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| CN101655638A true CN101655638A (en) | 2010-02-24 |
| CN101655638B CN101655638B (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101419197A Expired - Fee Related CN101655638B (en) | 2008-08-19 | 2008-08-19 | Liquid crystal display device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345801A (en) * | 2010-07-29 | 2012-02-08 | 深圳Tcl新技术有限公司 | Backlight module of liquid crystal display device and control method thereof |
| CN102844608A (en) * | 2010-04-15 | 2012-12-26 | 三菱电机株式会社 | Backlight device and liquid crystal display apparatus |
| CN103827573A (en) * | 2011-09-29 | 2014-05-28 | 恩普乐股份有限公司 | Surface light source device and display device |
| CN104793397A (en) * | 2015-03-16 | 2015-07-22 | 厦门天马微电子有限公司 | Liquid crystal display module and liquid crystal display device |
| CN113867047A (en) * | 2021-09-28 | 2021-12-31 | 深圳市云湖电子科技有限公司 | Special-shaped backlight source module and control method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3247643B2 (en) * | 1997-09-10 | 2002-01-21 | インターナショナル・ビジネス・マシーンズ・コーポレーション | Liquid crystal display device |
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2008
- 2008-08-19 CN CN2008101419197A patent/CN101655638B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102844608A (en) * | 2010-04-15 | 2012-12-26 | 三菱电机株式会社 | Backlight device and liquid crystal display apparatus |
| CN102844608B (en) * | 2010-04-15 | 2015-03-25 | 三菱电机株式会社 | Backlight device and liquid crystal display apparatus |
| CN102345801A (en) * | 2010-07-29 | 2012-02-08 | 深圳Tcl新技术有限公司 | Backlight module of liquid crystal display device and control method thereof |
| CN103827573A (en) * | 2011-09-29 | 2014-05-28 | 恩普乐股份有限公司 | Surface light source device and display device |
| CN103827573B (en) * | 2011-09-29 | 2016-08-31 | 恩普乐股份有限公司 | Planar light source device and display device |
| CN104793397A (en) * | 2015-03-16 | 2015-07-22 | 厦门天马微电子有限公司 | Liquid crystal display module and liquid crystal display device |
| US9939681B2 (en) | 2015-03-16 | 2018-04-10 | Xiamen Tianma Micro-Electronics Co., Ltd. | Liquid crystal display module and liquid crystal display device |
| CN113867047A (en) * | 2021-09-28 | 2021-12-31 | 深圳市云湖电子科技有限公司 | Special-shaped backlight source module and control method |
| CN113867047B (en) * | 2021-09-28 | 2022-08-23 | 深圳市云湖电子科技有限公司 | Special-shaped backlight module and control method |
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| CN101655638B (en) | 2012-08-22 |
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Granted publication date: 20120822 |