CN101777312B - Error diffusion adjusting method for LED dynamic backlight - Google Patents
Error diffusion adjusting method for LED dynamic backlight Download PDFInfo
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- CN101777312B CN101777312B CN2010101231293A CN201010123129A CN101777312B CN 101777312 B CN101777312 B CN 101777312B CN 2010101231293 A CN2010101231293 A CN 2010101231293A CN 201010123129 A CN201010123129 A CN 201010123129A CN 101777312 B CN101777312 B CN 101777312B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009792 diffusion process Methods 0.000 title claims abstract description 17
- 238000005192 partition Methods 0.000 claims abstract description 21
- 230000007547 defect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 239000012467 final product Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 1
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Abstract
An error diffusion adjusting method of an LED dynamic backlight comprises the following steps: reading backlight data of a backlight partition; judging the position of the partition around the partition; reading the backlight data of the surrounding subareas of the subarea; judging whether the sum of the partition data and the threshold value is smaller than the maximum data of the surrounding partitions; if the sum of the partition data and the threshold is less than the maximum data of the surrounding partitions, the new backlight data of the partition is the sum of the original backlight data of the partition + the backlight data of the surrounding partitions multiplied by the diffusion coefficient K; if the sum of the partition data and the threshold value is not less than the maximum data, the backlight data of the partition remains unchanged: the new backlight data of the partition is the original backlight data of the partition. The invention solves the defects that in dynamic backlight, because the brightness difference between adjacent backlight partitions is too large, the backlight shadow slides on a screen and the vision is seriously influenced by blurring the backlight data of the image.
Description
Technical field
The present invention relates to a kind of control method of LED-backlit, be specifically related to a kind of error diffusion control method of LED dynamic backlight.
Background technology
LED as the LCD of backlight and CCFL cold-cathode fluorescence lamp as the LCD of backlight compare have environment protection health, the power and energy saving, the color representation ability is strong and the advantage of long service life.Adopt dynamic LED-backlit mode to have the advantage more energy-conservation, that contrast is high.But owing to adopt dynamic backlight; Bright-dark degree backlight can change with the variation of image dynamically; When the very big image of a secondary black and white contrast moves on liquid crystal display; The back is backlight also along with moving of image, and light and shade shade at this moment backlight will be shown from liquid crystal display and reveal to come, and has had a strong impact on the display quality of image.
Summary of the invention
The object of the present invention is to provide a kind ofly can reduce light and shade difference backlight, solve shade backlight slided, had a strong impact on the LED dynamic backlight of vision shortcoming on screen error diffusion control method.
For achieving the above object, the technical scheme that the present invention adopts is: the LED dynamic backlight that is used for LCD is handled, and may further comprise the steps:
1) reads the backlight data of a backlight subarea;
2) judge section post around this subregion the position;
3) read this subregion backlight data of subregion on every side;
4) calculate the new backlight data of this subregion:
Take out maximum data in this subregion subregion on every side;
Judge that this partition data and threshold value sum are whether less than the maximum data of subregion on every side;
If this partition data and threshold value sum be less than the maximum data of subregion on every side, the subregion backlight data sum * coefficient of diffusion K of the new backlight data of this subregion=former backlight data of this subregion+on every side then;
If this partition data and threshold value sum are not less than the maximum data of subregion on every side, then the backlight data of subregion remains unchanged: the former backlight data of the new backlight data of this subregion=this subregion;
Said threshold value is: 32≤threshold value≤128; Coefficient of diffusion K:0.1≤K≤0.75.
The present invention judge section post around this subregion the process of position following: in the right and the bottom of this subregion, or in the left side, the right and the bottom of this subregion, or in the left side and the bottom of this subregion; Or in top, the right and the bottom of this subregion; Or at the left side, the right, the bottom and upper segment of this subregion, or in top, the left side and the bottom of this subregion, or on top and the right of this subregion; Or on the left side, top and the right of this subregion, or in the left side and the top of this subregion.
The present invention carries out Fuzzy processing through the backlight data to image, has solved in the dynamic backlight, because the shade backlight that luminance difference causes too greatly between adjacent backlight subarea slides, has a strong impact on the shortcoming of vision on screen.
Description of drawings
Fig. 1 is 3 * 3 backlight subarea data instance;
Fig. 2 is the new backlight subarea data after the error diffusion;
Fig. 3 is the process flow diagram of error diffusion method of the present invention;
Fig. 4 is for calculating the process flow diagram of new backlight data.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explain.
For the technology contents, the goal of the invention that make the present invention use and the effect that reaches thereof have more complete and clearly disclose, specifying down now.
Algorithm flow Fig. 3 of the present invention:
1) reads the backlight data of a backlight subarea; Described backlight subarea is the LED-backlit array of the capable M row of N, and row number is from 1 to N, and row number are from 1 to M, total N * M backlight subarea, and wherein N and M are the integer greater than 1;
2) judge section post around this subregion the position;
3) read the backlight data of subregion on every side;
4) calculate the new backlight data of this subregion according to process flow diagram 4.
Its detailed process is following:
The backlight data that reads the 1st subregion among Fig. 1 is 0; Judge that subregion is at the right and the bottom of this subregion, i.e. the 2nd subregion and the 4th subregion around this subregion; Reading on every side, the backlight data of subregion is 255 and 0.Calculate the new backlight data of this subregion according to process flow diagram 4: the maximum backlight data of subregion is 255 on every side, the maximum backlight data 255 of subregion backlight data 0+ threshold value 64＜on every side subregions; So subregion backlight data sum (255+0) * coefficient of diffusion K0.25=64 around the former backlight data 0+ of the new backlight data=subregion of subregion.Get final product among Fig. 2 the new backlight data of the 1st subregion be 64.
The data that read the 2nd backlight subarea among Fig. 1 are 255; Judge that subregion is at the left side, the right and the bottom of this subregion, i.e. the 1st subregion, the 3rd subregion and the 5th subregion around this subregion; Reading on every side, the backlight data of subregion is 0,200 and 0.Calculate the new backlight data of this subregion according to process flow diagram 4: the maximum backlight data of subregion is 200 on every side, the maximum backlight data 200 of subregion backlight data 255+ threshold value 64＞on every side subregions; So former backlight data 255 of the new backlight data=subregion of subregion.Get final product among Fig. 2 the new backlight data of the 2nd subregion be 255.
The data that read the 3rd backlight subarea among Fig. 1 are 200; Judge that subregion is at the left side and the bottom of this subregion, i.e. the 2nd subregion and the 6th subregion around this subregion; Reading on every side, the backlight data of subregion is 255 and 200.Calculate the new backlight data of this subregion according to process flow diagram 4: the maximum backlight data of subregion is 255 on every side, the maximum backlight data 255 of subregion backlight data 200+ threshold value 64＞on every side subregions; So former backlight data 200 of the new backlight data=subregion of subregion.Get final product among Fig. 2 the new backlight data of the 3rd subregion be 200.
The data that read the 4th backlight subarea among Fig. 1 are 0; Judge that subregion is at top, the right and the bottom of this subregion, i.e. the 1st subregion, the 5th subregion and the 7th subregion around this subregion; Reading on every side, the backlight data of subregion is 0,0 and 0.Calculate the new backlight data of this subregion according to process flow diagram 4: the maximum backlight data of subregion is 0 on every side, the maximum backlight data 0 of subregion backlight data 0+ threshold value 64＞on every side subregions; So former backlight data 0 of the new backlight data=subregion of subregion.Get final product among Fig. 2 the new backlight data of the 4th subregion be 0.
The data that read the 5th backlight subarea among Fig. 1 are 0; Judge that subregion is at the left side, the right, the bottom and upper segment of this subregion, i.e. the 4th subregion, the 6th subregion, the 2nd subregion and the 8th subregion around this subregion; Reading on every side, the backlight data of subregion is 0,200,255 and 0.Calculate the new backlight data of this subregion according to process flow diagram 4: the maximum backlight data of subregion is 255 on every side, the maximum backlight data 255 of subregion backlight data 0+ threshold value 64＜on every side subregions; So subregion backlight data sum (255+200+0) * coefficient of diffusion K0.25=114 around the former backlight data 0+ of the new backlight data=subregion of subregion.Get final product among Fig. 2 the new backlight data of the 5th subregion be 114.
The data that read the 6th backlight subarea among Fig. 1 are 200; Judge that subregion is at the left side, the bottom and upper segment of this subregion, i.e. the 5th subregion, the 3rd subregion and the 9th subregion around this subregion; Reading on every side, the backlight data of subregion is 0,200 and 200.Calculate the new backlight data of this subregion according to process flow diagram 4: the maximum backlight data of subregion is 200 on every side, the maximum backlight data 200 of subregion backlight data 200+ threshold value 64＞on every side subregions; So former backlight data 200 of the new backlight data=subregion of subregion.Get final product among Fig. 2 the new backlight data of the 6th subregion be 200.
The data that read the 7th backlight subarea among Fig. 1 are 0; Judge around this subregion subregion on top and the right of this subregion, i.e. the 4th subregion and the 8th subregion; Reading on every side, the backlight data of subregion is 0 and 0.Calculate the new backlight data of this subregion according to process flow diagram 4: the maximum backlight data of subregion is 0 on every side, the maximum backlight data 0 of subregion backlight data 0+ threshold value 64＞on every side subregions; So former backlight data 0 of the new backlight data=subregion of subregion.Get final product among Fig. 2 the new backlight data of the 7th subregion be 0.
The data that read the 8th backlight subarea among Fig. 1 are 0; Judge around this subregion subregion in the left side, the right and the top of this subregion, i.e. the 7th subregion, the 9th subregion and the 5th subregion; Reading on every side, the backlight data of subregion is 0,200 and 0.Calculate the new backlight data of this subregion according to process flow diagram 4: the maximum backlight data of subregion is 200 on every side, the maximum backlight data 200 of subregion backlight data 0+ threshold value 64＜on every side subregions; So subregion backlight data sum (0+200+0) * coefficient of diffusion K0.25=50 around the former backlight data 0+ of the new backlight data=subregion of subregion.Get final product among Fig. 2 the new backlight data of the 5th subregion be 50.
The data that read the 9th backlight subarea among Fig. 1 are 200; Judge around this subregion subregion in the left side and the top of this subregion, i.e. the 8th subregion and the 6th subregion; Reading on every side, the backlight data of subregion is 0 and 200.Calculate the new backlight data of this subregion according to process flow diagram 4: the maximum backlight data of subregion is 200 on every side, the maximum backlight data 200 of subregion backlight data 200+ threshold value 64＞on every side subregions; So former backlight data 200 of the new backlight data=subregion of subregion.Get final product among Fig. 2 the new backlight data of the 9th subregion be 200.
Certainly; This embodiment is merely specific embodiment of the present invention; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence, those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these changes and distortion all should belong to the protection domain of claim of the present invention.
Claims (2)
1. the error diffusion control method of a LED dynamic backlight is used for the LED dynamic backlight processing of LCD, it is characterized in that, may further comprise the steps:
1) reads the backlight data of a backlight subarea;
2) judge section post around this subregion the position;
3) read this subregion backlight data of subregion on every side;
4) calculate the new backlight data of this subregion:
Take out maximum data in this subregion subregion on every side;
Judge that this partition data and threshold value sum are whether less than the maximum data of subregion on every side;
If this partition data and threshold value sum be less than the maximum data of subregion on every side, the subregion backlight data sum * coefficient of diffusion K of the new backlight data of this subregion=former backlight data of this subregion+on every side then;
If this partition data and threshold value sum are not less than the maximum data of subregion on every side, then the backlight data of subregion remains unchanged: the former backlight data of the new backlight data of this subregion=this subregion;
Said threshold value is: 32≤threshold value≤128; Coefficient of diffusion K:0.1≤K≤0.75.
2. the error diffusion control method of a kind of LED dynamic backlight according to claim 1; It is characterized in that: judge section post around this subregion the process of position following: in the right and the bottom of this subregion, or in the left side, the right and the bottom of this subregion, or in the left side and the bottom of this subregion; Or in top, the right and the bottom of this subregion; Or at the left side, the right, the bottom and upper segment of this subregion, or in top, the left side and the bottom of this subregion, or on top and the right of this subregion; Or on the left side, top and the right of this subregion, or in the left side and the top of this subregion.
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| CN2010101231293A CN101777312B (en) | 2010-03-12 | 2010-03-12 | Error diffusion adjusting method for LED dynamic backlight |
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| CN2010101231293A CN101777312B (en) | 2010-03-12 | 2010-03-12 | Error diffusion adjusting method for LED dynamic backlight |
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| CN101777312B true CN101777312B (en) | 2012-05-09 |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102402947B (en) * | 2010-09-17 | 2014-03-12 | Tcl集团股份有限公司 | Dynamic zoning method of side backlight zoning control system |
| JP2012226176A (en) * | 2011-04-20 | 2012-11-15 | Sharp Corp | Multi-display system |
| CN102915172B (en) | 2011-08-03 | 2017-02-08 | 中兴通讯股份有限公司 | Method and device for managing display screen |
| CN102767763B (en) * | 2012-07-27 | 2014-06-25 | 深圳市华星光电技术有限公司 | Lateral-entering type backlight module with uneven-size backlight partitions and design method of lateral-entering type backlight module with uneven-size backlight partitions |
| CN105869579B (en) * | 2016-03-30 | 2019-01-29 | 青岛海信电器股份有限公司 | Backlight brightness regulation method, device and display terminal |
| CN107452355B (en) * | 2017-08-09 | 2019-09-20 | 青岛海信电器股份有限公司 | A kind of method of adjustment and device of dynamic contrast |
| CN107665681B (en) * | 2017-09-26 | 2020-06-05 | 武汉华星光电技术有限公司 | Liquid crystal display driving method, system and computer readable medium |
| CN109036295B (en) | 2018-08-09 | 2020-10-30 | 京东方科技集团股份有限公司 | Image display processing method and device, display device and storage medium |
| CN109119033B (en) * | 2018-10-17 | 2021-04-09 | 深圳Tcl新技术有限公司 | Backlight compensation method, device, system and storage medium |
| CN109493812A (en) * | 2018-12-29 | 2019-03-19 | 青岛海信电器股份有限公司 | Backlight control method, display equipment and storage medium |
| CN109686321B (en) * | 2019-02-15 | 2021-01-26 | 京东方科技集团股份有限公司 | Backlight control method and backlight controller of display device and display device |
| CN109979401B (en) * | 2019-05-06 | 2021-01-08 | 京东方科技集团股份有限公司 | Driving method, driving apparatus, display device, and computer readable medium |
| CN110910840B (en) * | 2019-12-13 | 2021-01-26 | 京东方科技集团股份有限公司 | Liquid crystal display, backlight adjusting method thereof and computer readable medium |
| CN114464143B (en) * | 2020-11-10 | 2023-07-18 | 上海天马微电子有限公司 | Method for controlling backlight source of display device and display device |
| TWI786719B (en) * | 2021-07-13 | 2022-12-11 | 義隆電子股份有限公司 | Method for improving halo effect of display |
| CN115841801A (en) * | 2022-12-12 | 2023-03-24 | 深圳市华星光电半导体显示技术有限公司 | Backlight driving method and liquid crystal display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4285532B2 (en) * | 2006-12-01 | 2009-06-24 | ソニー株式会社 | Backlight control device, backlight control method, and liquid crystal display device |
| JP4655079B2 (en) * | 2007-11-06 | 2011-03-23 | ソニー株式会社 | Liquid crystal display device, liquid crystal display module, and liquid crystal display device driving method |
| JP4840393B2 (en) * | 2008-04-11 | 2011-12-21 | ソニー株式会社 | Display control apparatus and method, and program |
| CN101282425B (en) * | 2008-04-30 | 2010-06-23 | 北京中星微电子有限公司 | Method and device for compensating backlight |
| RU2471214C2 (en) * | 2008-06-27 | 2012-12-27 | Шарп Кабушики Каиша | Apparatus for controlling liquid crystal display, liquid crystal display, method of controlling liquid crystal display, program and data medium |
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