CN105280144A - Overdrive technology for reducing color cast effect - Google Patents
Overdrive technology for reducing color cast effect Download PDFInfo
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- CN105280144A CN105280144A CN201410260570.4A CN201410260570A CN105280144A CN 105280144 A CN105280144 A CN 105280144A CN 201410260570 A CN201410260570 A CN 201410260570A CN 105280144 A CN105280144 A CN 105280144A
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Abstract
The invention discloses an overdrive technology for reducing a color cast effect. The technology includes the following steps that: 101, as for a red component, a green component and a blue component of each pixel color in each frame, a corresponding overdrive gray-scale value is generated through utilizing existing technologies according to the gray-scale values of the three kinds of color components of a current frame and the gray-scale values of a previous frame, and the bit length of the overdrive gray-scale value is 8 bits and indicates a range from 0 to 255; and 102, an overdrive table is generated according to the gray-scale values of the three kinds of color components of the current frame and the gray-scale values of the previous frame, and the corresponding overdrive gray-scale value. With the overdrive technology of the invention adopted, the problem of variation of the proportions of a red component, a green component and a blue component which are outputted to a liquid crystal display screen, which is caused by overdrive processing, can be solved, and the color cast effect can be effectively alleviated or even eliminated.
Description
Technical field
The present invention relates to a kind of overdrive technique for LCDs, especially relate to a kind of overdrive technique reducing colour cast effect.
Background technology
Overdrive technique (overdriveOD) can effectively reduce the response time that LCDs is changed between different GTG, thus solves the Image sticking problems of liquid crystal display.The one of overdrive technique realizes being set up overdrive table; Then to each liquid crystal cells, present frame grey decision-making corresponding to it and former frame grey decision-making inquiry overdrive table obtain its grey decision-making of overdriving, and (when present frame grey decision-making equals former frame grey decision-making, grey decision-making of overdriving equals present frame grey decision-making; When present frame grey decision-making is greater than former frame grey decision-making, grey decision-making of overdriving is more than or equal to present frame grey decision-making; When present frame grey decision-making is less than former frame grey decision-making, grey decision-making of overdriving is less than or equal to present frame grey decision-making); When grey decision-making of finally overdriving converts voltage-drop loading to LCDs, just can reach the switching time of reducing between the different GTG of liquid crystal, eliminate the object of Image sticking problems.
Existing techniques in realizing process is, searching overdrive table respectively to R, G, B (red, green, blue) three components (can be same table, also can be different tables), obtain its grey decision-making of overdriving, dreamboat is that after the grey decision-making of overdriving of R, G, B tri-components outputs to LCDs, display effect reaches the effect that present frame grey decision-making represents; But in practical application, because the scope being input to grey decision-making corresponding to LCDs is 0 to 255, namely need to carry out saturated process to grey decision-making of overdriving.Because the saturated error of the grey decision-making of overdriving that different former frame is corresponding with present frame grey decision-making is different, after causing R, G, B tri-components to be overdrived, export to R, G, B ratio that LCDs shows relatively overdrive before R, G, B ratio of present frame change, picture Show Color is caused to change, there is colour cast phenomenon, reduce image frame quality.
Summary of the invention
Object of the present invention causes picture Show Color to change for current overdrive technique exactly, occurs colour cast phenomenon, reduces the present situation of image frame quality, a kind of overdrive technique reducing colour cast effect of proposition.
Reduce an overdrive technique for colour cast effect, it is characterized in that, comprise the following steps:
101, for red, green, blue three components of each pixel color of each frame, according to grey decision-making and the former frame grey decision-making of present frame three kinds of different colours components, prior art is utilized to generate corresponding grey decision-making of overdriving;
102, according to present frame grey decision-making, former frame grey decision-making, the corresponding grey decision-making generation overdrive table of overdriving of three different colours components;
103, saturated process is carried out to grey decision-making of overdriving, generate the overdrive table after saturated process; Namely get corresponding boundary value to the grey decision-making of overdriving exceeding expression scope: if grey decision-making of overdriving is less than 0, then the grey decision-making of overdriving after saturated process is 0; If overdrived, grey decision-making is greater than 255, then the grey decision-making of overdriving after saturated process is 255; If overdrived, grey decision-making is between 0 to 255, then the grey decision-making of overdriving after saturated process is original grey decision-making of overdriving;
104, add K bit to each grey decision-making of overdriving to be used for representing its saturation degree, obtain the overdrive table of saturation degree mark;
105, utilize the overdrive table having saturation degree to mark to carry out process of overdriving, solve the Image sticking problems of liquid crystal display, the colour cast effect even eliminated and overdrive and process and cause can be reduced simultaneously.
Described step 104, K bit is added to each grey decision-making of overdriving and is used for representing its saturation degree, obtain the overdrive table of saturation degree mark, specifically comprise the following steps:
201, the present frame that in calculated table-drive, each grey decision-making of overdriving is corresponding and the absolute value of former frame grey decision-making difference, i.e. difference (diff)=| present frame grey decision-making-former frame grey decision-making |;
202, the saturation degree of each grey decision-making of overdriving in the calculated table-drive of utilization variance, formula is:
Saturation degree=(1-difference/255) * 2
k
203, each grey decision-making of overdriving in overdrive table is added K bit to represent its saturation infromation, K bit can represent maximum 2
kplant the saturation degree of size, obtain the overdrive table of saturation degree mark;
204, saturation infromation is represented with the high K position bit of grey decision-making of overdriving, in the overdrive table then having saturation degree to mark, each grey decision-making of overdriving comprises two parts information: least-significant byte bit represents grey decision-making size of overdriving, and high K position bit represents grey decision-making saturation degree of overdriving.
Described step 105, utilizes the overdrive table having saturation degree to mark to carry out process of overdriving, solves the Image sticking problems of liquid crystal display, can reduce the colour cast effect even eliminated and overdrive and process and cause simultaneously, specifically comprise the following steps:
301, to each pixel P, according to the grey decision-making of red, green, blue three components of its present frame and former frame, search the overdrive table having saturation degree to mark, obtain overdrive grey decision-making size and the grey decision-making saturation infromation of overdriving of red, green, blue three components of pixel P;
302, the maximum saturation angle value of overdriving in grey decision-making of red, green, blue three components of pixel P is calculated;
303, utilize following formula to adjust the grey decision-making of overdriving of red, green, blue three components of pixel P respectively, if it overdrives grey decision-making, saturation degree is less than maximum saturation, then reduce its grey decision-making size of overdriving, concrete formula is:
Grey decision-making of overdriving after adjustment=(grey decision-making size-present frame grey decision-making of overdriving) × F (maximum saturation of overdriving in grey decision-making of three components, grey decision-making saturation degree of overdriving)+present frame grey decision-making
Wherein the result of function F is the adjustment rate factor adjusting grey decision-making of overdriving, and presetting table realization, also can be obtained by following computing by searching one:
F (M, g)=1-M × (M-g)/(2
k-1), wherein M is maximum saturation, and g is the saturation degree of the component that will adjust, and K is the length of saturation degree;
304, the grey decision-making of overdriving after adjustment is outputted to LCDs.
Compared with prior art, effect of the present invention is actively significantly, specifically, the invention solves R, G, B three-component ratio variation issue outputting to LCDs of overdriving and processing and bringing, effectively can reduce and even eliminate colour cast effect.
Accompanying drawing explanation
Fig. 1 is method flow Fig. 1 of the present invention;
Fig. 2 is method flow Fig. 2 of the present invention;
Fig. 3 is method flow Fig. 3 of the present invention;
Fig. 4 is saturated overdrive table before treatment;
Fig. 5 is the overdrive table after saturated process;
Fig. 6 be with the saturated process of hexadecimal representation after overdrive table;
Fig. 7 is the overdrive table having saturation degree with the K=2 of hexadecimal representation.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Reduce an overdrive technique for colour cast effect, it is characterized in that, comprise the following steps:
101, for red, green, blue three components of pixel P, according to grey decision-making (63,31,255) and the former frame grey decision-making (95,31,223) of present frame three kinds of different colours, utilize prior art to generate corresponding grey decision-making of overdriving, be respectively (45,31,260);
102, overdrive table, i.e. Fig. 4 is generated according to the present frame grey decision-making of three different components, former frame grey decision-making, corresponding grey decision-making of overdriving;
103, saturated process is carried out to grey decision-making of overdriving, generate the overdrive table 5 after saturated process or Fig. 6; Namely get corresponding boundary value to the grey decision-making of overdriving exceeding expression scope: if grey decision-making of overdriving is less than 0, then the grey decision-making of overdriving after saturated process is 0; If overdrived, grey decision-making is greater than 255, then the grey decision-making of overdriving after saturated process is 255; If overdrived, grey decision-making is between 0 to 255, then the grey decision-making of overdriving after saturated process is original grey decision-making of overdriving; Being respectively (45,31,255) of the overdrive grey decision-making of red, green, blue three components after saturated process of pixel P;
104, add 2 bits to each grey decision-making of overdriving to be used for representing its saturation degree, obtain the overdrive table of saturation degree mark, i.e. Fig. 7;
105, utilize the overdrive table having saturation degree to mark to carry out process of overdriving, solve the Image sticking problems of liquid crystal display, the colour cast effect even eliminated and overdrive and process and cause can be reduced simultaneously.
Described step 104, adds 2 bits to each grey decision-making of overdriving and is used for representing its saturation degree, obtains the overdrive table of saturation degree mark, specifically comprises the following steps:
201, the present frame that in calculated table-drive, each grey decision-making of overdriving is corresponding and the absolute value of former frame grey decision-making difference, i.e. difference (diff)=| present frame grey decision-making-former frame grey decision-making |;
202, the saturation degree of each grey decision-making of overdriving in the calculated table-drive of utilization variance, formula is:
Saturation degree=(1-difference/255) * 4
203, each grey decision-making of overdriving in overdrive table is added 2 bits to represent its saturation infromation, obtain the overdrive table of saturation degree mark, i.e. Fig. 7;
204, saturation infromation is represented with high 2 bits of grey decision-making of overdriving, in the overdrive table then having saturation degree to mark, each grey decision-making of overdriving comprises two parts information: least-significant byte bit represents grey decision-making size of overdriving, and high 2 bits represent grey decision-making saturation degree of overdriving.
Described step 105, utilizes the overdrive table having saturation degree to mark to carry out process of overdriving, solves the Image sticking problems of liquid crystal display, can reduce the colour cast effect even eliminated and overdrive and process and cause simultaneously, specifically comprise the following steps:
301, to each pixel P, according to the grey decision-making of red, green, blue three components of its present frame and former frame, search the overdrive table having saturation degree to mark, obtain overdrive grey decision-making size (2d, the 1f of red, green, blue three components of pixel P, and grey decision-making saturation infromation (0 of overdriving ff), 0,1) grey decision-making size of, wherein overdriving decimally is expressed as (45,31,255);
302, maximum saturation angle value=1 of overdriving in grey decision-making of red, green, blue three components of pixel P is calculated;
303, utilize following formula to adjust the grey decision-making of overdriving of red, green, blue three components of pixel P respectively, if it overdrives grey decision-making, saturation degree is less than maximum saturation, then reduce its grey decision-making size of overdriving, concrete formula is:
Grey decision-making of overdriving after adjustment=(grey decision-making size-present frame grey decision-making of overdriving) × F (maximum saturation of overdriving in grey decision-making of three components, grey decision-making saturation degree of overdriving)+present frame grey decision-making
Wherein the result of function F is the adjustment rate factor adjusting grey decision-making of overdriving, and presetting table realization, also can be obtained by following computing by searching one:
F (M, g)=1-M × (M-g)/(2
k-1), wherein M is maximum saturation, and g is the saturation degree of the component that will adjust, and K is the length of saturation degree;
In embodiment, the red and green component of pixel P needs adjustment to overdrive grey decision-making, the adjustment rate factor of its grey decision-making of overdriving is: (F (1,0)=1-1/3=2/3, F (1,0)=1-1/3=2/3), grey decision-making of overdriving after its adjustment is for ((45-63) × 2/3+63=51, (31-31) × 2/3+31=31); Pixel P outputs to the grey decision-making of red, green, blue three components of display screen for (51,31,255);
304, the grey decision-making of overdriving after adjustment is outputted to LCDs.
Claims (3)
1. reduce an overdrive technique for colour cast effect, it is characterized in that, comprise the following steps:
101, for red, green, blue three components of each pixel color of each frame, according to grey decision-making and the former frame grey decision-making of present frame three kinds of different colours components, prior art is utilized to generate corresponding grey decision-making of overdriving;
102, according to present frame grey decision-making, former frame grey decision-making, the corresponding grey decision-making generation overdrive table of overdriving of three different colours components;
103, saturated process is carried out to grey decision-making of overdriving, generate the overdrive table after saturated process; Namely get corresponding boundary value to the grey decision-making of overdriving exceeding expression scope: if grey decision-making of overdriving is less than 0, then the grey decision-making of overdriving after saturated process is 0; If overdrived, grey decision-making is greater than 255, then the grey decision-making of overdriving after saturated process is 255; If overdrived, grey decision-making is between 0 to 255, then the grey decision-making of overdriving after saturated process is original grey decision-making of overdriving;
104, add K bit to each grey decision-making of overdriving to be used for representing its saturation degree, obtain the overdrive table of saturation degree mark;
105, utilize the overdrive table having saturation degree to mark to carry out process of overdriving, solve the Image sticking problems of liquid crystal display, the colour cast effect even eliminated and overdrive and process and cause can be reduced simultaneously.
2. a kind of overdrive technique reducing colour cast effect as claimed in claim 1, it is characterized in that: described step 104, add K bit to each grey decision-making of overdriving to be used for representing its saturation degree, obtain the overdrive table of saturation degree mark, specifically comprise the following steps:
201, the present frame that in calculated table-drive, each grey decision-making of overdriving is corresponding and the absolute value of former frame grey decision-making difference, i.e. difference (diff)=| present frame grey decision-making-former frame grey decision-making |;
202, the saturation degree of each grey decision-making of overdriving in the calculated table-drive of utilization variance, formula is:
Saturation degree=(1-difference/255) * 2
k
203, each grey decision-making of overdriving in overdrive table is added K bit to represent its saturation infromation, K bit can represent maximum 2
kplant the saturation degree of size, obtain the overdrive table of saturation degree mark;
204, saturation infromation is represented with the high K position bit of grey decision-making of overdriving, in the overdrive table then having saturation degree to mark, each grey decision-making of overdriving comprises two parts information: least-significant byte bit represents grey decision-making size of overdriving, and high K position bit represents grey decision-making saturation degree of overdriving.
3. a kind of overdrive technique reducing colour cast effect as claimed in claim 1, it is characterized in that: described step 105, the overdrive table having saturation degree to mark is utilized to carry out process of overdriving, solve the Image sticking problems of liquid crystal display, the colour cast effect even eliminated and overdrive and process and cause can be reduced simultaneously, specifically comprise the following steps:
301, to each pixel P, according to the grey decision-making of red, green, blue three components of its present frame and former frame, search the overdrive table having saturation degree to mark, obtain overdrive grey decision-making size and the grey decision-making saturation infromation of overdriving of red, green, blue three components of pixel P;
302, the maximum saturation angle value of overdriving in grey decision-making of red, green, blue three color components of pixel P is calculated;
303, utilize following formula to adjust the grey decision-making of overdriving of red, green, blue three components of pixel P respectively, if it overdrives grey decision-making, saturation degree is less than maximum saturation, then reduce its grey decision-making size of overdriving, concrete formula is:
Grey decision-making of overdriving after adjustment=(grey decision-making size-present frame grey decision-making of overdriving) × F (maximum saturation of overdriving in grey decision-making of three components, grey decision-making saturation degree of overdriving)+present frame grey decision-making
Wherein the result of function F is the adjustment rate factor adjusting grey decision-making of overdriving, and presetting table realization, also can be obtained by following computing by searching one:
F (M, g)=1-M × (M-g)/(2
k-1), wherein M is maximum saturation, and g is the saturation degree of the component that will adjust, and K is the length of saturation degree;
304, the grey decision-making of overdriving after adjustment is outputted to LCDs.
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| CN201410260570.4A CN105280144A (en) | 2014-06-12 | 2014-06-12 | Overdrive technology for reducing color cast effect |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913825A (en) * | 2016-06-30 | 2016-08-31 | 京东方科技集团股份有限公司 | Liquid crystal display driving method, liquid crystal display and display device |
| CN107657930A (en) * | 2017-11-13 | 2018-02-02 | 深圳市华星光电技术有限公司 | Improve the method and LCD display of LCD display colour cast |
| CN110824768A (en) * | 2019-10-29 | 2020-02-21 | 昆山龙腾光电股份有限公司 | Backlight module and display device |
| CN111862897A (en) * | 2019-04-26 | 2020-10-30 | 联咏科技股份有限公司 | Driving method for source electrode driving device and display system thereof |
| CN111862889A (en) * | 2019-04-28 | 2020-10-30 | 京东方科技集团股份有限公司 | Display device, driving device and driving method thereof |
| CN114596826A (en) * | 2022-03-22 | 2022-06-07 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving method and device, display panel and storage medium |
| WO2022188296A1 (en) * | 2021-03-10 | 2022-09-15 | 成都九天画芯科技有限公司 | Field-sequential temporal color mixing algorithm |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101105914A (en) * | 2006-07-12 | 2008-01-16 | 瀚宇彩晶股份有限公司 | Liquid crystal display device and its overdrive method |
| CN101241683A (en) * | 2008-03-25 | 2008-08-13 | 友达光电股份有限公司 | LCD driving method |
| JP2009237352A (en) * | 2008-03-27 | 2009-10-15 | Sony Corp | Liquid crystal display device |
| US20120218574A1 (en) * | 2011-02-28 | 2012-08-30 | Seiko Epson Corporation | Printing control device and printing control program |
| CN102855857A (en) * | 2012-09-03 | 2013-01-02 | 福建华映显示科技有限公司 | Color display method of color-sequence liquid crystal display |
-
2014
- 2014-06-12 CN CN201410260570.4A patent/CN105280144A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101105914A (en) * | 2006-07-12 | 2008-01-16 | 瀚宇彩晶股份有限公司 | Liquid crystal display device and its overdrive method |
| CN101241683A (en) * | 2008-03-25 | 2008-08-13 | 友达光电股份有限公司 | LCD driving method |
| JP2009237352A (en) * | 2008-03-27 | 2009-10-15 | Sony Corp | Liquid crystal display device |
| US20120218574A1 (en) * | 2011-02-28 | 2012-08-30 | Seiko Epson Corporation | Printing control device and printing control program |
| CN102855857A (en) * | 2012-09-03 | 2013-01-02 | 福建华映显示科技有限公司 | Color display method of color-sequence liquid crystal display |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913825A (en) * | 2016-06-30 | 2016-08-31 | 京东方科技集团股份有限公司 | Liquid crystal display driving method, liquid crystal display and display device |
| US10482827B2 (en) | 2016-06-30 | 2019-11-19 | Boe Technology Group Co., Ltd. | Display apparatus and driving method thereof |
| CN107657930A (en) * | 2017-11-13 | 2018-02-02 | 深圳市华星光电技术有限公司 | Improve the method and LCD display of LCD display colour cast |
| CN107657930B (en) * | 2017-11-13 | 2020-01-31 | 深圳市华星光电技术有限公司 | Method for improving color cast of LCD (liquid crystal display) and LCD |
| CN111862897A (en) * | 2019-04-26 | 2020-10-30 | 联咏科技股份有限公司 | Driving method for source electrode driving device and display system thereof |
| CN111862889A (en) * | 2019-04-28 | 2020-10-30 | 京东方科技集团股份有限公司 | Display device, driving device and driving method thereof |
| CN110824768A (en) * | 2019-10-29 | 2020-02-21 | 昆山龙腾光电股份有限公司 | Backlight module and display device |
| CN110824768B (en) * | 2019-10-29 | 2022-08-02 | 昆山龙腾光电股份有限公司 | Display device |
| WO2022188296A1 (en) * | 2021-03-10 | 2022-09-15 | 成都九天画芯科技有限公司 | Field-sequential temporal color mixing algorithm |
| CN114596826A (en) * | 2022-03-22 | 2022-06-07 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving method and device, display panel and storage medium |
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Application publication date: 20160127 |