CN101630487B - Liquid crystal display and driving method - Google Patents
Liquid crystal display and driving method Download PDFInfo
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- CN101630487B CN101630487B CN 200810135855 CN200810135855A CN101630487B CN 101630487 B CN101630487 B CN 101630487B CN 200810135855 CN200810135855 CN 200810135855 CN 200810135855 A CN200810135855 A CN 200810135855A CN 101630487 B CN101630487 B CN 101630487B
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Abstract
The invention provides a liquid crystal display and a driving method, in particular to application image segmentation technology which comprises the following steps: segmenting image data into a plurality of image blocks, carrying out image analysis on the image blocks, regulating low gray-scale image data of the image blocks into high gray-scale image data, outputting a backlight control signal to a backlight control module, controlling a corresponding backlight module block of the image block by the backlight control module, and darkening the backlight of the image block to reduce the problem of color migration of the image block.
Description
Technical field
The present invention relates to a kind of liquid crystal display and driving method, espespecially a kind of image application cutting techniques is adjusted the image block that belongs to high gamut zone, reduces gamut.
Background technology
See also Fig. 1, it is the system architecture diagram of known liquid crystal display.As shown in Figure 1, the liquid crystal display take resolution as 10,24*,768 100 is described below as example.This liquid crystal display 100 has to drive the red pixel of 1024 row, the green pixel of 1024 row and the blue pixel of 1024 row, always total 1024*3 bar data line and 768 sweep traces.This data line and sweep trace are driven by data driver 110 and scanner driver 120 respectively.These data drivers 110 and these scanner drivers 120 are under the control of the data controlling signal Control_D that controller 130 is exported, sequentially receive many pixel data PD that this controller 130 transmits and process, and export corresponding voltage to drive many data lines of this liquid crystal display 100.These scanner drivers 120 then are under the control of the scan control signal Control_S that this controller 130 is exported, and sequentially the output scanning signal scans every sweep trace.Every sweep trace and every data line intersect part, limit a pixel.After all sweep trace of every scanning, all pixels are with driven complete, to finish the demonstration of a picture (Frame).
Generally speaking, because the light transmittance when facing liquid crystal display 100 with side-looking liquid crystal display 100 is not identical.Because the phasic difference that the incident light of different angles produces in liquid crystal layer (Retardation) is not identical.Therefore, when viewing angle not simultaneously, the suffered deviation coefficient of light is not identical, causes penetrance different yet.So different visual angles can cause shown luminance brightness different.And when different color light for example red light, green light and blue light) when facing from side-looking each with different brightness ratio colour mixtures after, can produce and face the gamut phenomenon not identical with the shown color of side-looking.
Therefore, the present invention has obtained design of the present invention in view of the defective of known technology, invents out the application's ＂ liquid crystal display and driving method ".
Summary of the invention
Fundamental purpose of the present invention is for providing a kind of liquid crystal display and driving method, and espespecially a kind of image application cutting techniques is adjusted the image block that belongs to high gamut zone, reduces gamut.
Another object of the present invention is for providing a kind of liquid crystal display and driving method, espespecially a kind of image application cutting techniques is partitioned into a plurality of image blocks with this image data, carries out image analysing computer for these a plurality of image blocks, adjustment belongs to the image block in high gamut zone, reduces gamut.
Another object of the present invention is for providing a kind of liquid crystal display and driving method, espespecially a kind of image application cutting techniques, this image data is partitioned into a plurality of image blocks, carry out image analysing computer for these a plurality of image blocks, the low grey-tone image data of this image block are adjusted into the high gray image data, export simultaneously backlight control signal to backlight control module, this backlight control module is then controlled the corresponding backlight module block of this image block, dim the backlight of this image block, with the problem of the gamut that reduces this image block.
Another object of the present invention is for providing a kind of liquid crystal display and driving method, GTG value generator is proofreaied and correct in espespecially a kind of application, this image data is partitioned into a plurality of image blocks, carry out image analysing computer for these a plurality of image blocks, the low grey-tone image data of this image block are adjusted into the high gray image data, export simultaneously backlight control signal to backlight control module, this backlight control module is then controlled the corresponding backlight module block of this image block, dim the backlight of this image block, with the problem of the gamut that reduces this image block.
To achieve these goals, the invention provides a kind of liquid crystal display, comprise:
Many data lines;
The multi-strip scanning line;
A plurality of data drivers are in order to drive described many data lines;
A plurality of scanner drivers are in order to drive described multi-strip scanning line; And
Controller, comprise and proofread and correct GTG value generator, described correction GTG value generator receives image data, described image data is partitioned into a plurality of image blocks, carry out image analysing computer for described a plurality of image blocks, take judge described a plurality of image block as high gamut zone and low gamut zone one of them, wherein, when judging that described image block is described high gamut zone, then described correction GTG value generator is adjusted into the high gray image data with the low grey-tone image data of described image block, to reduce the gamut of described image block;
Wherein said correction GTG value generator output backlight control signal is to backlight control module, this backlight control module is controlled the corresponding backlight module block of described image block, dim the backlight of described image block, with the effect of the gamut that realize to reduce described image block, and
Wherein the adjustment backlight of this image block is the length of adjusting the backlight open time,
Wherein said correction GTG value generator comprises:
Image block cutting unit, it is partitioned into a plurality of image blocks with described image data, and carries out image analysing computer for described a plurality of image blocks, take judge described a plurality of image block as high gamut zone and low gamut zone one of them;
Computing unit, described computing unit provides yield value according to the judged result of described image block cutting unit; And
Multiplication unit is with the rear output of multiplying each other of the image data GTG value of described image block and described yield value, to reduce the gamut of described image block; And
Wherein when described image block is described low gamut zone, then the low grey-tone image data of described image block are not adjusted into the high gray image data.
To achieve these goals, the present invention also provides a kind of liquid crystal display driving method, comprises the following step:
Image data is partitioned into a plurality of image blocks;
Carry out image analysing computer for these a plurality of image blocks, confirm that these image blocks are to belong to high gamut zone or belong to low gamut zone;
When this image block belongs to high gamut zone, then carry out the gamut adjustment, the low grey-tone image data of this image block are adjusted translation become the high gray image data, and the output backlight control signal is to backlight control module, described backlight control module is then controlled the corresponding backlight module block of described image block, dim the backlight of described image block, to reduce the gamut of this image block, wherein the adjustment backlight of this image block is the length of adjusting the backlight open time; And
When described image block is described low gamut zone, then do not carry out the gamut adjustment, the low grey-tone image data with described image block are not adjusted into the high gray image data, directly the image data of described image block are exported.
By with following diagram and detailed description, will more in depth understand the present invention.
Description of drawings
Fig. 1 is the system architecture diagram of known liquid crystal display;
Fig. 2 A is the system architecture diagram of the liquid crystal display of first preferred embodiment of the invention;
Fig. 2 B is that the image block of first preferred embodiment of the invention is the judgement synoptic diagram that belongs to high gamut zone (Color-shift region) or belong to low gamut zone (Color-shift-less region);
Fig. 3 is the schematic flow sheet of the LCD drive method of first preferred embodiment of the invention;
Fig. 4 is the block schematic diagram of inside of this correction GTG value generator of first preferred embodiment of the invention;
Fig. 5 is the synoptic diagram of backlight module block of corresponding backlight module of image display block of the LCD MODULE of first preferred embodiment of the invention.
Embodiment
Display packing and display for describing display of the present invention are described with following specific embodiment, yet interest field of the present invention is not limited to following embodiment.
See also Fig. 2 A, it is the system architecture diagram of the liquid crystal display of first preferred embodiment of the invention.Shown in Fig. 2 A, the liquid crystal display 200 take resolution as 1024*768 is described below as example.This liquid crystal display 200 has to drive the red pixel of 1024 row, the green pixel of 1024 row and the blue pixel of 1024 row, always total 1024*3 bar data line and 768 sweep traces.This data line and sweep trace are driven by data driver 210 and scanner driver 220 respectively.These data drivers 210 and these scanner drivers 220 are under the control of the data controlling signal Control_D that controller 230 is exported, sequentially receive many pixel data PD that this controller 230 transmits and process, and export corresponding voltage to drive many data lines of this liquid crystal display 200.These scanner drivers 220 then are under the control of the scan control signal Control_S that this controller 230 is exported, and sequentially the output scanning signal scans every sweep trace.Every sweep trace and every data line intersect part, limit a pixel.After all sweep trace of every scanning, all pixels are with driven complete, to finish the demonstration of a picture (Frame).
Wherein also comprise in this controller 230 and proofread and correct GTG value generator 231, this correction GTG value generator 231 receives image data, this image data is partitioned into a plurality of image blocks, carry out image analysing computer for these a plurality of image blocks, confirm that these image blocks are to belong to high gamut zone or belong to low gamut zone, shown in Fig. 2 B.If this image block belongs to low gamut zone, then this correction GTG value generator 231 does not carry out the gamut adjustment, that is the low grey-tone image data of this image block are not adjusted translation and become the high gray image data, directly with the image data output of this image block.If this image block belongs to high gamut zone, then this correction GTG value generator 231 carries out the gamut adjustment, the low grey-tone image data adjustment translation that also is about to this image block becomes the high gray image data, this correction GTG value generator 231 output backlight control signal Gain_blk are not to backlight control module (being shown on the figure) simultaneously, this backlight control module is then controlled the corresponding backlight module block of this image block, dim the backlight of this image block, with the problem of the gamut that reduces this image block.Therefore part or many whole pixel data PD can proofread and correct GTG value generator 231 via this and carry out the gamut adjustment, and adjust simultaneously the corresponding voltage of output to drive many data lines of this liquid crystal display 200.These scanner drivers 220 then are under the control of the scan control signal Control_S that this controller 230 is exported, and sequentially the output scanning signal scans every sweep trace.Every sweep trace and every data line intersect part, limit a pixel.After all sweep trace of every scanning, all pixels are with driven complete, to finish the demonstration of a picture.Therefore can utilize the liquid crystal display of this first preferred embodiment and the purpose that driving method realizes reducing the gamut problem in the picture.
Please refer to shown in Figure 3ly, it is the schematic flow sheet of the LCD drive method of first preferred embodiment of the invention.As shown in Figure 3, when inputting, image (please refer to square number 310), the liquid crystal display of this first preferred embodiment is partitioned into a plurality of image blocks (please refer to square number 320) with this image data, carry out image analysing computer (please refer to square number 330) for these a plurality of image blocks, confirm that these image blocks are to belong to high gamut zone or belong to low gamut zone.If this image block belongs to low gamut zone, then do not carry out the gamut adjustment, that is the low grey-tone image data of this image block are not adjusted translation and become the high gray image data, directly with the image data output (please refer to square number 350) of this image block.If this image block belongs to high gamut zone, then carry out the gamut adjustment, the low grey-tone image data adjustment translation that also is about to this image block becomes high gray image data (please refer to square number 340), export simultaneously backlight control signal Gain_blk (please refer to square number 360) to backlight control module, this backlight control module is then controlled the corresponding backlight module block of this image block, dim (please refer to square number 370) backlight of this image block, with the problem of the gamut that reduces this image block.Therefore part or many whole image pixel data can be carried out the gamut adjustment, and adjust simultaneously the corresponding voltage of output to drive many data lines of this liquid crystal display 200.These scanner drivers 220 then are under the control of the scan control signal Control_s that this controller 230 is exported, and sequentially the output scanning signal scans every sweep trace.Every sweep trace and every data line intersect part, limit a pixel.After all sweep trace of every scanning, all pixels are with driven complete, to finish the demonstration of a picture.Therefore can utilize the liquid crystal display of this first preferred embodiment and the purpose that driving method realizes reducing the gamut problem in the picture.
Please refer to shown in Figure 4ly, it is the block schematic diagram of inside of this correction GTG value generator 231 of first preferred embodiment of the invention.As shown in Figure 4, this correction GTG value generator 231 comprises image block cutting unit 231A, computing unit 231B and multiplication unit 231C.The image that this image block cutting unit 231A inputs this image input 310 carries out the image block to be cut apart, and carries out image analysing computer for these a plurality of image blocks, confirms that these image blocks are to belong to high gamut zone or belong to low gamut zone.If this image block belongs to low gamut zone, then do not carry out the gamut adjustment, that is the low grey-tone image data of this image block are not adjusted translation and become the high gray image data.Therefore the yield value Gain_im of this computing unit 231B output is 1, and this image block cutting unit 231A will belong to the image data GTG value of this image block in low gamut zone and yield value Gain_im via this multiplication unit 231C rear output of multiplying each other.And these scanner drivers 220 are under the control of the data controlling signal Control_D that this controller 230 is exported, the image data GTG value and the yield value Gain_im product value that sequentially receive many these image blocks that this controller 230 transmits are processed, and export corresponding voltage to drive many data lines of this liquid crystal display 200.
If this image block belongs to high gamut zone, then carry out the gamut adjustment, the low grey-tone image data adjustment translation that also is about to this image block becomes the high gray image data, therefore the yield value Gain_im of this computing unit 231B output is greater than 1, and this image block cutting unit 231A will belong to the image data GTG value of this image block in high gamut zone and yield value Gain_im via this multiplier 231C rear output of multiplying each other, and the low grey-tone image data of this image block are adjusted translation becomes the high gray image data.And these scanner drivers 220 are under the control of the data controlling signal Control_D that this controller 230 is exported, the image data GTG value and the yield value Gain_im product value that sequentially receive many these image blocks that this controller 230 transmits are processed, and export corresponding voltage to drive many data lines of this liquid crystal display 200.This computing unit 231B output this moment backlight control signal Gain_blk is to backlight control module, and this backlight control module is then controlled the corresponding backlight module block of this image block, dims the backlight of this image block, with the problem of the gamut that reduces this image block.Therefore part or many whole image pixel data can be carried out the gamut adjustment, and adjust simultaneously the corresponding voltage of output to drive many data lines of this liquid crystal display 200.These scanner drivers 220 then are under the control of the scan control signal Control_S that this controller 230 is exported, and sequentially the output scanning signal scans every sweep trace.Every sweep trace and every data line intersect part, limit a pixel.After all sweep trace of every scanning, all pixels are with driven complete, to finish the demonstration of a picture.Therefore can utilize liquid crystal display and the driving method of this first preferred embodiment to reach the problem that reduces gamut in the picture.
Please refer to shown in Figure 5ly, it is the backlight module block synoptic diagram of corresponding backlight module of image display block of the LCD MODULE of first preferred embodiment of the invention.As shown in Figure 5, this backlight module can be partitioned into a plurality of backlight module blocks, and this backlight module block comprises a plurality of backlights, and the image display block of backlight to correspondence is provided.When the image block is to belong to low gamut zone, then do not carry out the gamut adjustment, that is the low grey-tone image data of this image block are not adjusted translation and become the high gray image data, directly with the image data output of this image block.If this image block belongs to high gamut zone, then carry out the gamut adjustment, the low grey-tone image data adjustment translation that also is about to this image block becomes the high gray image data, export simultaneously backlight control signal Gain_blk to backlight control module, this backlight control module is then controlled the corresponding backlight module block of this image block, dim the backlight of this image block, with the problem of the gamut that reduces this image block.Therefore can utilize the liquid crystal display of this first preferred embodiment and the purpose that driving method realizes reducing the gamut problem in the picture.
To describe with the image area block size fixedly cut apart and the size of backlight module block in the present embodiment, yet when practicing present technique, do not limit the size of image area block size and backlight module block for fixedly to cut apart, also can be dynamic and cut apart, dynamic is adjusted the size of cutting apart of cutting apart size and backlight module block of image block.
In addition, the pixel data for red pixel, green pixel and the blue pixel of image block carries out individually the gamut adjustment in the present embodiment, and the indivedual low grey-tone image data of this image block are adjusted translation becomes the high gray image data.
In addition, this backlight control module is then controlled the corresponding backlight module block of this image block, dimming this image block method backlight has two kinds, and a kind of is the size of adjusting backlight illumination, and another kind is that the length of adjusting the backlight open time is controlled the backlight of this image block.
The specific embodiment of the invention described above is that those skilled in the art can understand with diagram, yet protection scope of the present invention is not confined to above-described embodiment.
In sum, purpose of the present invention fully and is effectively disclosed.Those skilled in the art can revise arbitrarily or change the present invention, however the scope that neither disengaging claim of the present invention is protected.
Claims (4)
1. liquid crystal display comprises:
Many data lines;
The multi-strip scanning line;
A plurality of data drivers are in order to drive described many data lines;
A plurality of scanner drivers are in order to drive described multi-strip scanning line; And
Controller, comprise and proofread and correct GTG value generator, described correction GTG value generator receives image data, described image data is partitioned into a plurality of image blocks, carry out image analysing computer for described a plurality of image blocks, take judge described a plurality of image block as high gamut zone and low gamut zone one of them, wherein, when judging that described image block is described high gamut zone, then described correction GTG value generator is adjusted into the high gray image data with the low grey-tone image data of described image block, to reduce the gamut of described image block;
Wherein said correction GTG value generator output backlight control signal is to backlight control module, this backlight control module is controlled the corresponding backlight module block of described image block, dim the backlight of described image block, with the effect of the gamut that realize to reduce described image block, and
Wherein the adjustment backlight of this image block is the length of adjusting the backlight open time,
Wherein said correction GTG value generator comprises:
Image block cutting unit, it is partitioned into a plurality of image blocks with described image data, and carries out image analysing computer for described a plurality of image blocks, take judge described a plurality of image block as high gamut zone and low gamut zone one of them;
Computing unit, described computing unit provides yield value according to the judged result of described image block cutting unit; And
Multiplication unit is with the rear output of multiplying each other of the image data GTG value of described image block and described yield value, to reduce the gamut of described image block; And
Wherein when described image block is described low gamut zone, then the low grey-tone image data of described image block are not adjusted into the high gray image data.
2. liquid crystal display as claimed in claim 1, wherein when described image block was described low gamut zone, the yield value of described computing unit output was 1.
3. liquid crystal display as claimed in claim 1, wherein when described image block was described high gamut zone, then the yield value of described computing unit output was greater than 1.
4. liquid crystal display driving method comprises the following step:
Image data is partitioned into a plurality of image blocks;
Carry out image analysing computer for described a plurality of image blocks, take judge described a plurality of image block as high gamut zone and low gamut zone one of them;
When judging that described image block is high gamut zone, then the low grey-tone image data with described image block are adjusted into the high gray image data, and the output backlight control signal is to backlight control module, described backlight control module is then controlled the corresponding backlight module block of described image block, dim the backlight of described image block, to reduce the gamut of described image block, wherein the adjustment backlight of this image block is the length of adjusting the backlight open time; And
When described image block is described low gamut zone, then do not carry out the gamut adjustment, the low grey-tone image data with described image block are not adjusted into the high gray image data, directly the image data of described image block are exported.
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| CN101778230B (en) * | 2010-03-19 | 2011-12-21 | 四川长虹电器股份有限公司 | Control method of liquid crystal display television automatic backlight adjusting speed |
| CN102402033B (en) * | 2010-09-16 | 2014-06-11 | 苏州汉朗光电有限公司 | Column region correction scanning drive method for smectic liquid crystal display screen |
| TWI514369B (en) * | 2014-05-29 | 2015-12-21 | Au Optronics Corp | Signal conversion method for display image |
| CN104299592B (en) * | 2014-11-07 | 2016-11-23 | 深圳市华星光电技术有限公司 | Liquid crystal panel and driving method thereof |
| CN104616630B (en) * | 2015-01-22 | 2017-04-26 | 青岛海信电器股份有限公司 | Determination method and device for backlight gray-scale |
| CN104751807B (en) * | 2015-03-05 | 2017-05-17 | 青岛海信电器股份有限公司 | Method and device for regulating backlight brightness and liquid crystal display device |
| CN107863086B (en) * | 2017-12-20 | 2019-07-26 | 惠科股份有限公司 | A kind of driving method and display device of display device |
| CN108062937B (en) * | 2017-12-20 | 2020-02-21 | 惠科股份有限公司 | Display device and driving method thereof |
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| JP2008139480A (en) * | 2006-11-30 | 2008-06-19 | Toshiba Corp | Backlight controlling device, display device and method for controlling backlight of display device |
| JP5288579B2 (en) * | 2006-12-13 | 2013-09-11 | ルネサスエレクトロニクス株式会社 | Display device and controller driver |
| CN201048437Y (en) * | 2007-06-06 | 2008-04-16 | 青岛海信电器股份有限公司 | Backlight brightness automatic regulation circuit and television set using the circuit |
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