CN101630487A - Liquid crystal display and driving method - Google Patents
Liquid crystal display and driving method Download PDFInfo
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- CN101630487A CN101630487A CN200810135855A CN200810135855A CN101630487A CN 101630487 A CN101630487 A CN 101630487A CN 200810135855 A CN200810135855 A CN 200810135855A CN 200810135855 A CN200810135855 A CN 200810135855A CN 101630487 A CN101630487 A CN 101630487A
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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 LCD and driving method, refer to a kind of image application cutting techniques especially, adjust the image block that belongs to high gamut zone, reduce gamut.
Background technology
See also Fig. 1, it is the system architecture diagram of known LCD.As shown in Figure 1, be that the LCD 100 of 1024*768 is described below for example with resolution.This LCD 100 has the blue pixel in order to the green pixel and 1024 row of the red pixel that drives 1024 row, 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, receive many pixel data PD that this controller 130 transmitted in regular turn and handle, and export corresponding voltage to drive many data lines of this LCD 100.These scanner drivers 120 then are under the control of the scan control signal Control_S that this controller 130 is exported, and the output scanning signal scans every sweep trace in regular turn.Every sweep trace and every data line intersect part, limit a pixel.After all sweep trace of every scanning, all pixels will be driven and finish, to finish the demonstration of a picture (Frame).
Generally speaking, because the light transmittance when facing LCD 100 and inequality with side-looking LCD 100.Because the phasic difference (Retardation) that the incident light of different angles is produced in liquid crystal layer is also inequality.Therefore, when viewing angle not simultaneously, the suffered deviation coefficient of light is inequality, causes penetrance also different.So shown luminance brightness difference can be caused in different visual angles.And when different color light (for example red light, green light and blue light) when facing with side-looking each with different brightness ratio colour mixtures after, can produce and face the color inequality gamut phenomenon shown with 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 " LCD and driving method ".
Summary of the invention
Fundamental purpose of the present invention refers to a kind of image application cutting techniques especially for a kind of LCD and driving method are provided, and adjusts the image block that belongs to high gamut zone, reduces gamut.
Another object of the present invention is for providing a kind of LCD and driving method, especially refer to a kind of image application cutting techniques, this image data is partitioned into a plurality of image blocks, carry out image analysing computer at 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 LCD and driving method, especially refer to a kind of image application cutting techniques, this image data is partitioned into a plurality of image blocks, carry out image analysing computer at 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 backlight control signal simultaneously 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 LCD and driving method, especially refer to a kind of application correction GTG value generator, this image data is partitioned into a plurality of image blocks, carry out image analysing computer at 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 backlight control signal simultaneously 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 driving method, comprise the following step:
Image data is partitioned into a plurality of image blocks;
Carry out image analysing computer at these a plurality of image blocks, confirm that these image blocks are to belong to high gamut zone or belong to low gamut zone; And
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 becomes the high gray image data, to reduce the gamut of this image block.
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 LCD;
Fig. 2 A is the system architecture diagram of the LCD 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 the backlight module block of the image of the LCD MODULE of the first preferred embodiment of the invention corresponding backlight module that shows block.
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 LCD of first preferred embodiment of the invention.Shown in Fig. 2 A, be that the LCD 200 of 1024*768 is described below for example with resolution.This LCD 200 has the blue pixel in order to the green pixel and 1024 row of the red pixel that drives 1024 row, 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, receive many pixel data PD that this controller 230 transmitted in regular turn and handle, and export corresponding voltage to drive many data lines of this LCD 200.These scanner drivers 220 then are under the control of the scan control signal Control_S that this controller 230 is exported, and the output scanning signal scans every sweep trace in regular turn.Every sweep trace and every data line intersect part, limit a pixel.After all sweep trace of every scanning, all pixels will be driven and finish, 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 at 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 the corresponding voltage of output simultaneously to drive many data lines of this LCD 200.These scanner drivers 220 then are under the control of the scan control signal Control_S that this controller 230 is exported, and the output scanning signal scans every sweep trace in regular turn.Every sweep trace and every data line intersect part, limit a pixel.After all sweep trace of every scanning, all pixels will be driven and finish, to finish the demonstration of a picture.Therefore can utilize LCD 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 importing, image (please refer to square number 310), the LCD 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) at 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 backlight control signal Gain_blk (please refer to square number 360) simultaneously 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 the corresponding voltage of output simultaneously to drive many data lines of this LCD 200.These scanner drivers 220 then are under the control of the scan control signal Control_S that this controller 230 is exported, and the output scanning signal scans every sweep trace in regular turn.Every sweep trace and every data line intersect part, limit a pixel.After all sweep trace of every scanning, all pixels will be driven and finish, to finish the demonstration of a picture.Therefore can utilize LCD 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 imports this image input 310 carries out the image block to be cut apart, and carries out image analysing computer at 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 image data GTG value and yield value Gain_im that this image block cutting unit 231A will belong to this image block in low gamut zone export via this multiplication unit 231C back 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 receive many these image blocks that this controller 230 transmitted are in regular turn handled, and export corresponding voltage to drive many data lines of this LCD 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 back 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 receive many these image blocks that this controller 230 transmitted are in regular turn handled, and export corresponding voltage to drive many data lines of this LCD 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 the corresponding voltage of output simultaneously to drive many data lines of this LCD 200.These scanner drivers 220 then are under the control of the scan control signal Control_S that this controller 230 is exported, and the output scanning signal scans every sweep trace in regular turn.Every sweep trace and every data line intersect part, limit a pixel.After all sweep trace of every scanning, all pixels will be driven and finish, to finish the demonstration of a picture.Therefore can utilize the LCD 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 that the image of the LCD MODULE of first preferred embodiment of the invention shows the corresponding backlight module of block.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, provides backlight to show block to corresponding image.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 backlight control signal Gain_blk simultaneously 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 LCD of this first preferred embodiment and the purpose that driving method realizes reducing the gamut problem in the picture.
Be to describe in the present embodiment with the size of the image block fixedly cut apart and the size of backlight module block, yet when practicing present technique, the size that does not limit the size of image block and backlight module block is 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 at red pixel, green pixel and the blue pixel of image block carries out the gamut adjustment individually 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 the foregoing description.
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 (11)
1, a kind of LCD 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 at described a plurality of image blocks, with judge described a plurality of image block be 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.
2, LCD as claimed in claim 1, 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 at described a plurality of image blocks, with judge described a plurality of image block be 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 back 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.
3, LCD as claimed in claim 1, 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, reduce the effect of the gamut of described image block with realization.
4, LCD as claimed in claim 2, 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, reduce the effect of the gamut of described image block with realization.
5, LCD as claimed in claim 2 wherein when described image block is described low gamut zone, then is not adjusted into the high gray image data with the low grey-tone image data of described image block.
6, LCD as claimed in claim 2, the yield value of wherein said computing unit output is 1.
7, LCD as claimed in claim 2, wherein when described image block was described low gamut zone, the yield value of then described computing unit output was greater than 1.
8, 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 at described a plurality of image blocks, with judge described a plurality of image block be high gamut zone and low gamut zone one of them; And
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, to reduce the gamut of described image block.
9, liquid crystal display driving method as claimed in claim 8, also comprise the following step: 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.
10, liquid crystal display driving method as claimed in claim 9, also comprise the following step: when described image block is described high gamut zone, 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.
11, liquid crystal display driving method as claimed in claim 9, also comprise the following step: when described image block is described high gamut zone, 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.
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| CN102402033A (en) * | 2010-09-16 | 2012-04-04 | 苏州汉朗光电有限公司 | Column region correction scanning drive method for smectic liquid crystal display screen |
| CN104167193A (en) * | 2014-05-29 | 2014-11-26 | 友达光电股份有限公司 | Signal conversion method for display image |
| CN104616630A (en) * | 2015-01-22 | 2015-05-13 | 青岛海信电器股份有限公司 | Determination method and device for backlight gray-scale |
| CN104751807A (en) * | 2015-03-05 | 2015-07-01 | 青岛海信电器股份有限公司 | Method and device for regulating backlight brightness and liquid crystal display device |
| WO2016070448A1 (en) * | 2014-11-07 | 2016-05-12 | 深圳市华星光电技术有限公司 | Liquid crystal panel and drive method thereof |
| WO2019119585A1 (en) * | 2017-12-20 | 2019-06-27 | 惠科股份有限公司 | Method for driving display device and display device |
| WO2019119586A1 (en) * | 2017-12-20 | 2019-06-27 | 惠科股份有限公司 | Drive method for display device and display device |
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