CN101937148B - Backlight system for liquid display device and backlight color-complementing method thereof - Google Patents
Backlight system for liquid display device and backlight color-complementing method thereof Download PDFInfo
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- CN101937148B CN101937148B CN200910108162.6A CN200910108162A CN101937148B CN 101937148 B CN101937148 B CN 101937148B CN 200910108162 A CN200910108162 A CN 200910108162A CN 101937148 B CN101937148 B CN 101937148B
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Abstract
The invention belongs to the field of liquid crystal display and provides a backlight system for a liquid display device and a backlight color-complementing method thereof. The backlight system for the liquid display device provided by the invention comprises a main light source tube, a color-complementing tube, a reflector plate and a diffuser plate, wherein the main light source tube is used for supplying the main light source to a liquid crystal display television backlight system; the color-complementing tube is mainly used for adjusting a system spectrum of the main light source to make the spectrum of the emergent light of the diffuser plate have continuity; the reflector plate can effectively reflect the incident light of the main light source tube and the color-complementing tube and make the light emitted by the main light source tube and the color-complementing tube mix uniformly; and the diffuser plate is used for mixing the emergent light of the main source and the reflected light of the reflector plate uniformly and then emitting the light. The backlight source is used for complementing the brightness of the color-complementing tube according to the color requirements of images. Compared with the conventional liquid display device, the liquid crystal device of the invention can make the color of a display system reduced or close to the original color of the object better by adding the color-complementing tube; in addition, a backlight spectral line is widened to be close to a natural spectral line, so that the adaptability of human eyes is improved and visual fatigue is reduced.
Description
Technical field
The invention belongs to field of liquid crystal display, relate in particular to liquid crystal indicator and back light source producing method thereof.
Background technology
The residing occurring in nature of people, the spectrum of observing the visible ray of object by eyes is that enrich and continuous often.And adopting the liquid crystal indicator of common CCFL or LED-backlit, the light that backlight sends is but discrete several limited spectral coverage.The color that we see from LCD TV is the result of above-mentioned discontinuous spectral coverage being carried out to colour mixture, this method is a kind for the treatment of method that complicated colour is simplified, it can only reappear the color of original scenery substantially, and on spectral composition composition, having larger difference with the color of actual object, Fig. 1, Fig. 2, Fig. 3 have shown respectively the natural forms reflectance spectrum of same color and the difference of liquid crystal indicator demonstration spectrum.
Conventionally spectral component is abundanter, just more can show natural color.And the spectral bandwidth of LCD device backlight RGBLED will be well below the spectral bandwidth of display primary, thisly simulate the wider spectral line color of half-peak breadth with the narrower color of spectral line half-peak breadth, a lot of time, presented green or excessively red color, although very wide of the colour gamut of LCD device backlight color, but the sense of reality of image is poor, can cause the distortion of liquid crystal indicator color of image, compared with the physical environment that relatively adapts to successive line light with people, there is very big difference, simultaneously also undesirable in its colour rendering.
Therefore, for the image that liquid crystal indicator is shown has the image quality that more approaches object state of nature, be necessary to provide a kind of can be according to color of image need to be to be carried out the liquid crystal indicator of complementary color by back light system.
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 the image quality that more approaches 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 main light source fluorescent tube, and liquid crystal television backlight system main light source is provided; Complementary color fluorescent tube, for according to picture need to carry out complementary color to the spectrum of main light source, and adopt side illumination mode to be arranged on liquid crystal panel periphery; Complementary color tube circuit control section, for whole picture is divided into multiple regions, to the red, green, blue pixel data in the each region statistics that adds up, judge each subregional color tendentiousness, add up each subregional color tendentiousness, judge the color tendentiousness of overall picture, last according to the color tendentiousness of overall picture, control the luminous intensity of complementary color fluorescent tube; Reflector, can usable reflection main light source fluorescent tube and the incident light of complementary color fluorescent tube, and the light of main light source fluorescent tube and the transmitting of complementary color fluorescent tube is mixed; Diffuser plate, returns main light source emergent light and luminous plaque to penetrate light to mix outgoing.
Wherein, complementary color fluorescent tube is that straight-down negative mode is uniformly distributed setting.
Further to be to be arranged on the complementary color fluorescent tube of panel periphery be the fluorescent tube of one group of different colours in change.
Compare existing liquid crystal indicator, liquid crystal indicator provided by the invention, its spectral line backlight is compared the more horn of plenty of spectral line of available liquid crystal display device, thereby makes the color of display system more approach the Natural color of scenery.Can better reduce or approach the true colors of nature scenery, in addition, the width that increases spectral line backlight makes it close to natural light spectral line, increases the adaptability of human eye, reduces visual fatigue.
Accompanying drawing explanation
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 straight-down negative complementary color back light system structural representation provided by the invention;
Fig. 5 is the spectrum schematic diagram of Yellow luminous pipe;
Fig. 6 to 8 is side complementary color back light system structural representations provided by the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The object of this invention is to provide a liquid crystal indicator that spectral line backlight is abundant, improve LCD TV colour rendering, make color more true to nature.Refer to Fig. 4, straight-down negative complementary color back light system structural representation provided by the invention, described LCD device backlight system comprises main light source fluorescent tube 105, for liquid crystal television backlight system main light source is provided; Complementary color fluorescent tube 103, distribute by straight-down negative, for regulating main light source system spectrum, make to have more continuity from the spectrum of diffuser plate emergent light, complementary color fluorescent tube 103 can be a kind of monochromatic fluorescent tube that is different from main light source spectrum, can be also the white light fluorescent tube with full spectrum; Reflector 101, for reflecting the incident light of main light source fluorescent tube and complementary color fluorescent tube, and mixes the light of main light source fluorescent tube and the transmitting of complementary color fluorescent tube; Light shield 1031, makes illumination that complementary color fluorescent tube 103 launches to reflecting plate 101, avoids directly mixing with main light source fluorescent tube 105, distributes in equally uniform situation at arrangement and the main light source fluorescent tube 105 of complementary color fluorescent tube 103, can omit complementary color fluorescent tube 103; Diffuser plate 107, returns main light source 105 emergent lights and luminous plaque 101 to penetrate light to mix outgoing.
Complementary color tube circuit control section is described below: complementary color fluorescent tube can be made one group of fluorescent tube of particular color, normally adopts yellow or cyan fluorescent tube, and as complementary color fluorescent tube made to the fluorescent tube of one group of yellow, luminous main crest is near 580nm, as shown in Figure 5.Can adjust in real time according to the content of the performance of picture like this brightness of complementary color fluorescent tube, complementary color mode has two kinds:
The one, complementary color fluorescent tube is unified to control, need to carry out entirety adjustment according to the color of full frame, first our data of all rgb pixels to a frame picture add up respectively, and the pixel of supposing a frame picture has N, so just has: the data accumulation of red pixel and:
same green and blue pixel data cumulative sum are:
We are according to R above
sUM, G
sUM, B
sUMjudge picture color tendentiousness, work as R
sUMwith G
sUMsummation is much larger than B
sUM, and R
sUMwith G
sUMquantity approaching time, we just think that picture is more prone to yellow picture, in this time, we are just according to R
sUMwith G
sUMsummation size is carried out the brightness of suitable adjustment complementary color fluorescent tube, can simply be set to work as R
sUMwith G
sUMsummation is larger and compare B
sUMmuch larger time, the brightness of complementary color fluorescent tube is just higher, otherwise lower.
Another kind preferably method is picture to be carried out to subregion adjust, the accurately color demand of picture, first whole picture is divided into multiple regions, then to the judgement that adds up of the red, green, blue pixel data in each region, calculates each subregional color tendentiousness.And then the color tendentiousness of statistics All Ranges, judge the color tendentiousness of overall picture.
For example we have divided ten regions, add up respectively, when the pixels statistics data summation in a region meets two condition: R below
sUMwith G
sUMsummation is much larger than B
sUM, and R
sUMwith G
sUMquantity approach, it is yellow that we just think that this picture tends to.Then we see in these ten regions again has how many to tend to yellow, if such as there being six all to tend to yellow, it is yellow that we just think that this picture tends to, and this time, we adjusted the brightness of complementary color fluorescent tube again according to yellow tendency degree.
Adopt and use the same method, by selecting in advance the color of complementary color fluorescent tube, can carry out complementary color for any another kind of color, as cyan, luminescence spectrum is near 500nm, and we just can carry out the judgement of cyan tendentiousness to picture, then the brightness of complementary color lamp are arranged.
Refer to Fig. 6, side complementary color provided by the invention is backlight is blunderbuss structural representation, and described back light system comprises: reflector 201, incident light that can usable reflection complementary color fluorescent tube; Complementary color fluorescent tube 203, is mainly to regulate main light source system spectrum, makes to have more continuity from the spectrum of diffuser plate emergent light, and as required, complementary color fluorescent tube 203 can be the monochromatic fluorescent tube of different spectrum or the white light fluorescent tube with full spectrum; Light guide plate 204, the light uniform that complementary color fluorescent tube 203 is launched; Main light source fluorescent tube 205, provides the CCFL white light fluorescent tube of liquid crystal television backlight system main light source; Diffuser plate 207, returns main light source 205 emergent lights and luminous plaque 201 to penetrate light to mix outgoing.
In order to guarantee that desk lamp with dimmer switch 203 emergent lights are uniformly distributed more, also can adopt the light guide plate in Fig. 6 structure, use two groups of complementary color fluorescent tubes 203 simultaneously, two complementary color fluorescent tubes can certainly be divided into different colors, a yellow, is arranged to cyan for one, selects luminous according to the needs of image frame, provide wider colorimetric compensation, shown in the Fig. 7 of institute.
Refer to Fig. 8, in order to realize, more kinds of colors is compensated, further improvement of the present invention is, by a complementary color light tube group 203 is set at side, described complementary color light tube group 203 is made up of the fluorescent tube of different colours, can need to picture be compensated according to color of image.
The LCD device backlight system providing by method of the present invention, its spectral line backlight is compared the more horn of plenty of spectral line of available liquid crystal display device, close to natural continuously full spectrum, thereby makes the color of display system more approach the Natural color of scenery.Can better reduce the script color of nature scenery, in addition, by spectral line backlight is carried out to colorimetric compensation, increase the adaptability of human eye, reduce visual fatigue.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. a LCD device backlight system, comprising:
Main light source fluorescent tube, for providing liquid crystal television backlight system main light source;
Complementary color fluorescent tube, for according to picture need to carry out complementary color to the spectrum of main light source, and adopt side illumination mode to be arranged on liquid crystal panel periphery;
Complementary color tube circuit control section, for whole picture is divided into multiple regions, to the red, green, blue pixel data in the each region statistics that adds up, judge each subregional color tendentiousness, add up each subregional color tendentiousness, judge the color tendentiousness of overall picture, last according to the color tendentiousness of overall picture, control the luminous intensity of complementary color fluorescent tube;
Reflector, can usable reflection main light source fluorescent tube and the incident light of complementary color fluorescent tube, and the light of main light source fluorescent tube and the transmitting of complementary color fluorescent tube is mixed;
Light shield, is arranged at each complementary color fluorescent tube in a side relative with reflector, and the light of complementary color fluorescent tube transmitting is launched to reflecting plate, avoids directly mixing with main light source white light fluorescent tube;
Diffuser plate, returns main light source emergent light and luminous plaque to penetrate light to mix outgoing.
2. LCD device backlight system as claimed in claim 1, is characterized in that, described complementary color fluorescent tube is that straight-down negative mode is uniformly distributed setting.
3. LCD device backlight system as claimed in claim 1, is characterized in that, the glow color of described complementary color fluorescent tube is yellow or cyan.
4. LCD device backlight system as claimed in claim 1, is characterized in that, described complementary color fluorescent tube is to adopt the fluorescent tube of different colours to be oppositely arranged at the periphery of back light system.
5. LCD device backlight system as claimed in claim 1, is characterized in that, described complementary color fluorescent tube is by the complementary color light tube group that adopts the luminous lamp tube of different colours to form.
6. LCD device backlight system as claimed in claim 5, is characterized in that, the color of described complementary color light tube group at least comprises yellow and or cyan.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910108162.6A CN101937148B (en) | 2009-06-29 | 2009-06-29 | Backlight system for liquid display device and backlight color-complementing method thereof |
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| CN200910108162.6A CN101937148B (en) | 2009-06-29 | 2009-06-29 | Backlight system for liquid display device and backlight color-complementing method thereof |
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| CN101937148A CN101937148A (en) | 2011-01-05 |
| CN101937148B true CN101937148B (en) | 2014-06-25 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818759A (en) * | 2005-10-31 | 2006-08-16 | 陈盈君 | Backlight source system with liquid-crystal display and backlight source mixing method |
| CN2837886Y (en) * | 2005-11-07 | 2006-11-15 | 比亚迪股份有限公司 | LCD backlight module |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818759A (en) * | 2005-10-31 | 2006-08-16 | 陈盈君 | Backlight source system with liquid-crystal display and backlight source mixing method |
| CN2837886Y (en) * | 2005-11-07 | 2006-11-15 | 比亚迪股份有限公司 | LCD backlight module |
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| CN101937148A (en) | 2011-01-05 |
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