CN101777315A - Method for avoiding image retention of liquid crystal display - Google Patents
Method for avoiding image retention of liquid crystal display Download PDFInfo
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- CN101777315A CN101777315A CN200910105017A CN200910105017A CN101777315A CN 101777315 A CN101777315 A CN 101777315A CN 200910105017 A CN200910105017 A CN 200910105017A CN 200910105017 A CN200910105017 A CN 200910105017A CN 101777315 A CN101777315 A CN 101777315A
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Abstract
The invention is applicable to the technical field of liquid crystal display, providing a method for avoiding image retention of liquid crystal display. The method comprises the following steps: regulating the display position of the image on the display screen of the liquid crystal display to ensure that the image display position on the display screen of the liquid crystal display can be moved slowly opposite to the display screen of the liquid crystal display. In the technical scheme provided by the invention, the slow movement of the image position can be realized by only utilizing the output of the program controlling image processing module, thus avoiding the phenomenon of screen burning caused by long-time standstill of image or being less than full-screen display; and the method is only to ensure that the image can change slowly unperceived by users, thus not influencing visual experience of users.
Description
Technical field
The invention belongs to technical field of liquid crystal display, relate in particular to a kind of method of avoiding image retention of liquid crystal display.
Background technology
Along with the recoverable amount increase of domestic and international LCD TV, LCD and going deep into of using, liquid crystal " burns screen ", and (image retention) phenomenon begins to emerge.The so-called screen that burns is meant the long-time expendable ghost that stays behind the same picture that shows of LCDs on screen.This is in the following several ways: sometimes be whole still frame, as test card signal etc.; Sometimes be the part static content in the picture, as station symbol, form, LOGO, than grading.Particularly to 16: 9 LCD televisor, the user is with 4: 3 patterns (TV programme mainly is 4: 3 patterns at present) when watching, can form edge line in the black area of no image and the intersection of bright live image, on bright dark limb line, can produce so-called vertical line and burn the screen phenomenon.
The burning screen problem of LCD TV, LCD has become a great problem of liquid crystal industry, is perplexing liquid crystal display factory, has had influence on user's the effect of watching.
The main phenomenon that liquid crystal burns screen has following three kinds: first kind is burnt screen is problem common on some LCD.This phenomenon is to show relatively-stationary image in a period of time, is producing the image retention of maying be seen indistinctly behind the image switching on screen; Second and article one are similar, mainly be to use similar " Overdriver " the driven speed technology than new product, because it is to reduce the response time that driven is quickened basic goal, but the driving voltage of liquid crystal cells is not also withdrawn from the state of loading procedure fully, caused easier appearance to burn the appearance of screen phenomenon, and wherein used the more general of IPS (In-Plane Switching, plane conversion) that voltage quickens and VA (Vertical Alignment vertical orientation) class panel; The third can be called as " LCD uses tired ", and the display of the long-time continuous firing of public situation may run into.
Cause what is the main cause of burning screen? we must talk about from the video picture principle of liquid crystal display earlier, and liquid crystal display is to control pixel intensity by the rotation of the liquid crystal molecule of inner can, and the angle of rotation is controlled, as a valve.Each pixel is all passed through a very little thin film transistor (TFT) (TFT Thin filmtransistor) and is controlled institute's making alive.Utilize the photoelectric characteristic of liquid crystal, the rotation difference under different voltages, thus the throughput of change light realizes the control to pixel intensity.The liquid crystal display general work is in normal black pattern (Normal Black), and under this pattern, not alive pixel is for black, and alive pixel is bright.Because liquid crystal molecule has a specific character, the just malleable not of long duration that is in a certain state exactly, therefore can not to be fixed on a certain magnitude of voltage constant always for institute's making alive, otherwise it is of long duration, even voltage is removed, liquid crystal molecule also can be destroyed because of characteristic, forms different GTGs and can't reverse in response to the variation of electric field again.
Specifically be example with Fig. 1, demonstration be the state of each position liquid crystal molecule when on 16: 9 screen, showing 4: 3 format-patterns.In the black area 101 of Fig. 1, impressed voltage is zero, and liquid crystal molecule does not rotate, and is in the external force state that is not subjected to; In the clear zone 102 of Fig. 1, impressed voltage is in continuous variation, and liquid crystal molecule is movable.Because liquid crystal is a glutinousness, very big viscous force is arranged between the adjacent molecule, thereby can pin down adjacent clear zone liquid crystal molecule on the bright dark limb line at the black area liquid crystal molecule on the bright dark limb line, make these edge liquid crystal molecules 103 be in the stress state that is subjected to of non-thorough upset for a long time, of long duration like this, 102 places adjacent with black area 101 may stay the grey concealed wire in the clear zone.
At the burning screen phenomenon of LCD morning, existing technical scheme mainly contains following several:
1, uses screen protection program in the time of idle, can avoid occurring the long-term static situation of long-term static picture or the local content in the picture like this, reduced the probability that screen occurs burning;
2, the security set in the reservation operations system: main frame is idle to surpass 10 minutes, opens dynamic screen protection, surpasses 20 minutes and enters dormant state;
3, reduce the use of overdrive technology.But the response time of liquid crystal will be elongated;
4, in software, add 16: 9/4: 3 pattern timing automatic and switch, avoid the user to watch under the pattern at 4: 3 for a long time;
5, suitably reduce brightness and contrast's parameter of screen, can adopt the mode standard or the film mode of TV acquiescence, and avoid using dynamic mode or game mode, because the appearance of screen phenomenon is burnt in the too bright-coloured dazzling easier acceleration of picture.
Above various methodologies mainly is to reduce the generation of burning screen phenomenon by the change of user's use habit, has limited the use of user to LCD, and effect is unsatisfactory, therefore, needs a kind of technical scheme, solves LCD and burns the problem of shielding.
Summary of the invention
The object of the present invention is to provide a kind of method of avoiding image retention of liquid crystal display, be intended to solve the problem that LCD is burnt screen.
The present invention is achieved in that a kind of method of avoiding image retention of liquid crystal display, and described method comprises:
Adjust the display position of liquid crystal display panels curtain epigraph, make liquid crystal display panels curtain epigraph display position slowly move relative to described liquid crystal display panels curtain.
The display position of described adjustment image specifically comprises:
Change the scanning starting position of described liquid crystal display panels curtain epigraph every certain time interval, progressively adjust the horizontal reference position and/or the vertical reference position of described liquid crystal display panels curtain epigraph.
Total amount of movement that the display position of described liquid crystal display panels curtain epigraph moves relative to described display screen is no more than 2% of the intrinsic pixel count of described display screen.
The described time interval is 30 minutes, pixel of the each variation of the scanning starting position of described liquid crystal display panels curtain epigraph.
The present invention overcomes the deficiencies in the prior art, the output of control image processing module, make the position of the image that shows on the liquid crystal display equipment screen slowly move relative to described liquid crystal display panels curtain, avoided liquid crystal molecule is applied identical magnitude of voltage for a long time, avoided taking place " burning screen " (image retention) phenomenon.Technical scheme provided by the invention only utilizes the output of programmed control image processing module just can realize slowly moving of picture position, thereby avoid because long-time static or " burning screen " phenomenon that causes during less than full screen display of picture, owing to the slow variation that this method just allows image be difficult for discovering as the user, can not influence user's visual experience.
Description of drawings
Fig. 1 is 16: 9 LCD screen image boundary place liquid crystal molecule view when showing 4: 3 image;
Fig. 2 is an embodiment of the invention process flow diagram.
Embodiment
Technical scheme provided by the invention is: the output of control image processing module, make the position of the image that shows on the liquid crystal display equipment screen slowly move relative to described liquid crystal display panels curtain, avoided liquid crystal molecule is applied identical magnitude of voltage for a long time, avoided taking place " burning screen " (image retention) phenomenon.
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In the embodiment of the invention, be that example describes with the liquid crystal TV set display screen, other LCD can be suitable for technical scheme provided by the invention equally, and its principle is basic identical, and this does not give unnecessary details.
As stated in the Background Art, " burning screen " phenomenon is to be caused by local static institute in whole still frame or the whole image, so, as long as allow image move, makes the voltage that liquid crystal molecule is applied can not be in a certain fixed value for a long time, thereby avoids burning the screen phenomenon.
The display screen of available liquid crystal TV is 16: 9, and at present the program of simulated television substantially all is the ratio of width to height of 4: 3, and the image fidelity factor of its demonstration requires 90%～95%, in the embodiment of the invention is that the liquid crystal display of 1366X768 is an example with resolution.If will show 4: 3 television image, still keep 720 pixels (fidelity factor 94%) on the vertical direction, then on the horizontal direction the individual pixels of 960 (720*4/3=960), it is normal black also having the individual pixel of 406 (1366-960=406) on the horizontal direction.It is normal black also having the individual pixel of 48 (768-720=48) on the vertical direction.It is normal black that respectively there are 203 pixels on the horizontal direction both sides of image, illustrates under this kind state that screen all has the pixel of not used up and down, and this just makes image move becomes possibility.
In the present embodiment, by programmed control with the horizontal reference position of entire image slowly move left or to the right 20 left and right sides pixels (less than the screen intrinsic resolution 2%), translational speed be 2 pixels/hour, image moves with such speed, the user is difficult to discover.(when specifically using technical scheme provided by the invention, as long as speed image does not move and is discovered by the user, 2 pixels/hour translational speed be not necessary qualification) so, originally the fixed part that caused ghost has then progressively been moved 20 left and right sides pixels, makes fixing part " relatively move ".
One of ordinary skill in the art will appreciate that, realize that the image in the foregoing description moves and can instruct relevant hardware to finish by program, described program can be stored in (for example semiconductor memory) in a kind of computer-readable recording medium, the process flow diagram of this program comprises the steps: as shown in Figure 2
1, initialization, zero clearing move horizontally counter A and vertical moving counter B;
2, the entire image along continuous straight runs is to pixel of right translation, and pixel of translation (this is equivalent to change the scanning starting position of image) vertically makes progress;
3, move horizontally counter A and vertical moving counter B adds 1, pick up counting after the timer zero clearing;
4, is the timer timing full 30 minutes? if change step 5, otherwise wait for;
Does 5, moving horizontally counter A and vertical moving counter B count full? if change step 6, otherwise change step 2;
6, the entire image along continuous straight runs is to pixel of left, vertically pixel of translation downwards;
7, move horizontally counter A and subtract 1, vertical moving counter B subtracts 1, picks up counting after the timer zero clearing;
8, is the timer timing full 30 minutes? if change step 9, otherwise wait for;
Is 9, moving horizontally counter A and vertical moving counter B zero? if change step 2, otherwise change step 6.
Shown in above-mentioned flow process, entire image will be every 30 minutes to the right and the pixel that moves up, when moving full 20 pixels, to change moving direction, left and move down a pixel, so go round and begin again, make image slowly move with the speed that the user can not discover.During specific implementation technical scheme provided by the invention, each time interval of moving is not defined as 30 minutes, being difficult for discovering the moving to principle designs the mobile time interval of picture of publishing picture with the beholder gets final product, the pixel summation that moves in a certain direction is not defined as 20 yet, also can be the pixel count of other number, be principle not exceed 2% of display screen intrinsic resolution.
Because the method for present embodiment makes entire image do simultaneously slowly with vertical direction in the horizontal direction and moves, thus no matter be local static in the rest image of view picture or the image, also no matter which kind of display format can not cause and " burn screen ".
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. method of avoiding image retention of liquid crystal display, described method comprises:
Adjust the display position of liquid crystal display panels curtain epigraph, make liquid crystal display panels curtain epigraph display position slowly move relative to described liquid crystal display panels curtain.
2. method according to claim 1 is characterized in that, the display position of described adjustment image specifically comprises:
Change the scanning starting position of described liquid crystal display panels curtain epigraph every certain time interval, progressively adjust the horizontal reference position and/or the vertical reference position of described liquid crystal display panels curtain epigraph.
3. method according to claim 2 is characterized in that, total amount of movement that the display position of described liquid crystal display panels curtain epigraph moves relative to described display screen is no more than 2% of the intrinsic pixel count of described display screen.
4. method according to claim 2 is characterized in that, the described time interval is 30 minutes, pixel of the each variation of the scanning starting position of described liquid crystal display panels curtain epigraph.
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| CN200910105017A CN101777315A (en) | 2009-01-13 | 2009-01-13 | Method for avoiding image retention of liquid crystal display |
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| CN102467865A (en) * | 2010-11-18 | 2012-05-23 | 深圳Tcl新技术有限公司 | Method for preventing flat-panel display from screen burn |
| CN102496351A (en) * | 2011-11-11 | 2012-06-13 | 明基电通有限公司 | Control method for display device and display device adopting same |
| CN102723062A (en) * | 2011-03-18 | 2012-10-10 | 三星电子株式会社 | Method and apparatus for providing graphical user interface |
| CN105807462A (en) * | 2014-12-30 | 2016-07-27 | 深圳Tcl数字技术有限公司 | Liquid crystal display method and equipment |
| CN106331882A (en) * | 2015-06-30 | 2017-01-11 | 深圳市以美淑世文化传播有限公司 | Method of realizing dynamic frame function for television, television and television system |
| CN106547570A (en) * | 2016-11-29 | 2017-03-29 | 珠海市魅族科技有限公司 | Exchange method and electronic equipment |
| CN106935184A (en) * | 2015-12-30 | 2017-07-07 | 昆山工研院新型平板显示技术中心有限公司 | The driving method of flat-panel display device |
| CN107016961A (en) * | 2017-06-07 | 2017-08-04 | 京东方科技集团股份有限公司 | Method for displaying image, storage medium, image drive and display device |
| CN107231577A (en) * | 2017-08-08 | 2017-10-03 | 四川长虹电器股份有限公司 | The method to set up of Android intelligent television third party's video display window |
| CN108256062A (en) * | 2018-01-16 | 2018-07-06 | 携程旅游信息技术（上海）有限公司 | Web animation implementation method, device, electronic equipment, storage medium |
| US10269156B2 (en) | 2015-06-05 | 2019-04-23 | Manufacturing Resources International, Inc. | System and method for blending order confirmation over menu board background |
| US10313037B2 (en) | 2016-05-31 | 2019-06-04 | Manufacturing Resources International, Inc. | Electronic display remote image verification system and method |
| US10319408B2 (en) | 2015-03-30 | 2019-06-11 | Manufacturing Resources International, Inc. | Monolithic display with separately controllable sections |
| US10319271B2 (en) | 2016-03-22 | 2019-06-11 | Manufacturing Resources International, Inc. | Cyclic redundancy check for electronic displays |
| CN110189699A (en) * | 2019-05-10 | 2019-08-30 | 深圳市华星光电半导体显示技术有限公司 | The method of intelligent drives picture |
| US10510304B2 (en) | 2016-08-10 | 2019-12-17 | Manufacturing Resources International, Inc. | Dynamic dimming LED backlight for LCD array |
| CN111933089A (en) * | 2020-08-20 | 2020-11-13 | 福建捷联电子有限公司 | Method for improving LCD residual image |
| WO2020258526A1 (en) * | 2019-06-24 | 2020-12-30 | 深圳市华星光电半导体显示技术有限公司 | Display driving method for display panel, display panel and display device |
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| CN102467865A (en) * | 2010-11-18 | 2012-05-23 | 深圳Tcl新技术有限公司 | Method for preventing flat-panel display from screen burn |
| CN102723062A (en) * | 2011-03-18 | 2012-10-10 | 三星电子株式会社 | Method and apparatus for providing graphical user interface |
| US9799264B2 (en) | 2011-03-18 | 2017-10-24 | Samsung Electronics Co., Ltd. | Method and apparatus for reducing image sticking event on graphical user interface |
| CN102723062B (en) * | 2011-03-18 | 2017-08-29 | 三星电子株式会社 | Method and apparatus for providing graphic user interface |
| CN102496351A (en) * | 2011-11-11 | 2012-06-13 | 明基电通有限公司 | Control method for display device and display device adopting same |
| CN102496351B (en) * | 2011-11-11 | 2013-10-16 | 明基电通有限公司 | Control method for display device and display device adopting same |
| CN105807462A (en) * | 2014-12-30 | 2016-07-27 | 深圳Tcl数字技术有限公司 | Liquid crystal display method and equipment |
| CN105807462B (en) * | 2014-12-30 | 2019-01-18 | 深圳Tcl数字技术有限公司 | The method and liquid crystal display of liquid crystal display |
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| CN106331882A (en) * | 2015-06-30 | 2017-01-11 | 深圳市以美淑世文化传播有限公司 | Method of realizing dynamic frame function for television, television and television system |
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| CN108256062A (en) * | 2018-01-16 | 2018-07-06 | 携程旅游信息技术（上海）有限公司 | Web animation implementation method, device, electronic equipment, storage medium |
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| WO2020258526A1 (en) * | 2019-06-24 | 2020-12-30 | 深圳市华星光电半导体显示技术有限公司 | Display driving method for display panel, display panel and display device |
| CN111933089A (en) * | 2020-08-20 | 2020-11-13 | 福建捷联电子有限公司 | Method for improving LCD residual image |
| US11895362B2 (en) | 2021-10-29 | 2024-02-06 | Manufacturing Resources International, Inc. | Proof of play for images displayed at electronic displays |
| CN114077451A (en) * | 2021-11-26 | 2022-02-22 | 四川长虹电器股份有限公司 | Method for realizing screen burn-in prevention based on application self-management |
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Application publication date: 20100714 |