CN111933089A - Method for improving LCD residual image - Google Patents
Method for improving LCD residual image Download PDFInfo
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- CN111933089A CN111933089A CN202010842209.8A CN202010842209A CN111933089A CN 111933089 A CN111933089 A CN 111933089A CN 202010842209 A CN202010842209 A CN 202010842209A CN 111933089 A CN111933089 A CN 111933089A
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- pixel
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
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- Crystallography & Structural Chemistry (AREA)
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- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a method for improving the afterimage of a liquid crystal display, which comprises the following steps: step 1, a display scaler IC detects a display card input signal, and step 2, judges whether a static display part exists in the display card input signal; if yes, obtaining the contrast difference of the whole or local part of the still picture and executing the step 3; otherwise, closing the pixel adjusting function and executing the step 2; and 3, detecting and acquiring a still picture and the contrast difference of the picture by the display scaler IC, and performing pixel point adjustment on the still picture based on the contrast of the picture, wherein the pixel point adjustment comprises low-resolution pixel dynamic compensation and pixel point movement adjustment. The invention adopts the various methods of dynamic pixel compensation and pixel movement to effectively improve the problem of afterimage of liquid crystal display.
Description
Technical Field
The invention relates to the technical field of display, in particular to a method for improving the residual image of a liquid crystal display.
Background
The liquid crystal display displays the same still picture for a long time, and after the display interior is changed, an image sticking phenomenon (namely a residual image) of the previous picture is left, particularly the PANEL of the IPS is serious, and the phenomenon is restricted by liquid crystal materials and processes, cannot be completely improved, and influences the performance and the taste of the whole display.
At present, the manufacturing process and the material lifting process are continuously optimized in the liquid crystal panel, so that the production cost is increased, and the defect cannot be completely overcome.
Disclosure of Invention
The invention aims to provide a method for improving the afterimage of a liquid crystal display.
The technical scheme adopted by the invention is as follows:
a method for improving the afterimage of a liquid crystal display comprises the following steps:
step 1, the display scaler IC detects the input signal of the display card,
step 2, judging whether the input signal of the display card has a static display part; if yes, obtaining the contrast difference of the whole or local part of the still picture and executing the step 3; otherwise, closing the pixel adjusting function and executing the step 2;
and 3, detecting and acquiring a still picture and the contrast difference of the picture by the display scaler IC, and performing pixel point adjustment on the still picture based on the contrast of the picture, wherein the pixel point adjustment comprises low-resolution pixel dynamic compensation and pixel point movement adjustment.
Further, as a preferred embodiment, the method for dynamically compensating the low-resolution pixels in step 3 is as follows: the resolution of the display is dynamically reduced, pixel dynamic compensation is carried out under low resolution, and the liquid crystal always keeps a deflection motion state by rapidly switching the driving voltage of a pixel point to be simulated.
Further, as a preferred embodiment, in step 3, when the low-resolution pixel is dynamically compensated, the internal timer of the scaler IC is used to periodically adjust the whole pixels of the picture according to a certain ratio to reduce the contrast of the pixels of the still picture.
Further, as a preferred embodiment, the adjusting and reducing the contrast of the still picture pixel point according to a certain ratio specifically includes: the pixel points with the bright order above 240 orders and the pixel points with the dark order below 40 orders in the static picture are reduced in equal proportion, the deflection angle of the liquid crystal is changed, and the liquid crystal passivation caused by long-time use at the same angle is avoided.
Further, as a preferred embodiment, the method for adjusting the movement of the pixel point in step 3 is as follows: the pixel points of the display content of the still picture are moved and adjusted according to the set direction.
Further, as a preferred implementation scheme, the moving time of the pixel points and the number of the pixel points moved each time are determined by the contrast.
Further, as a preferred embodiment, when the pixel point is adjusted in step 3, at least one pixel point is adjusted in any direction from top to bottom and from left to right in the pixel point of the display content of the still picture, so as to change the display content of the original pixel point.
Further, as a preferred embodiment, in the step 3, when the pixel movement adjusting method is used, the pixel movement adjustment is performed on the picture at regular time by using a timer inside the scaler IC.
Further, as a preferred embodiment, the adjustment level is set by an OSD menu for a case where a still picture is displayed for a long time.
By adopting the technical scheme, aiming at the passivation of the liquid crystal molecules caused by the fact that the liquid crystal molecules are positioned at a certain angle for a long time, the liquid crystal deflection angle is changed by a method of carrying out dynamic contrast compensation on the pixel points of the static picture, and the passivation of the liquid crystal caused by the long-time use at the same angle is avoided. In addition, the display content of the original pixel point can be changed through pixel movement. The invention adopts the various methods of dynamic pixel compensation and pixel movement to effectively improve the problem of afterimage of liquid crystal display.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and the detailed description;
FIG. 1 is a schematic diagram of a television architecture for use with the present invention;
FIG. 2 is a schematic diagram of the pixel shifting principle of the present invention;
FIG. 3 is a flow chart illustrating a method for improving the image sticking of a liquid crystal display according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
As shown in fig. 1 to 3, the present invention discloses a method for improving the image sticking of a liquid crystal display, which comprises the following steps:
step 1, the display scaler IC detects the input signal of the display card,
step 2, judging whether the input signal of the display card has a static display part; if yes, obtaining the contrast difference of the whole or local part of the still picture and executing the step 3; otherwise, closing the pixel adjusting function and executing the step 2;
and 3, detecting and acquiring a still picture and the contrast difference of the picture by the display scaler IC, and performing pixel point adjustment on the still picture based on the contrast of the picture, wherein the pixel point adjustment comprises low-resolution pixel dynamic compensation and pixel point movement adjustment.
Further, as a preferred embodiment, the method for dynamically compensating the low-resolution pixels in step 3 is as follows: the resolution of the display is dynamically reduced, pixel dynamic compensation is carried out under low resolution, and the liquid crystal always keeps a deflection motion state by rapidly switching the driving voltage of a pixel point to be simulated.
Further, as a preferred embodiment, in step 3, when the low-resolution pixel is dynamically compensated, the internal timer of the scaler IC is used to periodically adjust the whole pixels of the picture according to a certain ratio to reduce the contrast of the pixels of the still picture.
Further, as a preferred embodiment, the adjusting and reducing the contrast of the still picture pixel point according to a certain ratio specifically includes: the pixel points with the bright order above 240 orders and the pixel points with the dark order below 40 orders in the static picture are reduced in equal proportion, the deflection angle of the liquid crystal is changed, and the liquid crystal passivation caused by long-time use at the same angle is avoided.
Further, as shown in fig. 2, as a preferred embodiment, the method for adjusting the movement of the pixel point in step 3 is: the pixel points of the display content of the still picture are moved and adjusted according to the set direction. The solid line characters represent original characters, and the dotted lines represent characters when pixel points move up, down, left and right.
Further, as a preferred implementation scheme, the moving time of the pixel points and the number of the pixel points moved each time are determined by the contrast.
Further, as a preferred embodiment, when the pixel point is adjusted in step 3, at least one pixel point is adjusted in any direction from top to bottom and from left to right in the pixel point of the display content of the still picture, so as to change the display content of the original pixel point.
Further, as a preferred embodiment, in the step 3, when the pixel movement adjusting method is used, the pixel movement adjustment is performed on the picture at regular time by using a timer inside the scaler IC.
Further, as a preferred embodiment, the adjustment level is set by an OSD menu for a case where a still picture is displayed for a long time.
By adopting the technical scheme, aiming at the passivation of the liquid crystal molecules caused by the fact that the liquid crystal molecules are positioned at a certain angle for a long time, the liquid crystal deflection angle is changed by a method of carrying out dynamic contrast compensation on the pixel points of the static picture, and the passivation of the liquid crystal caused by the long-time use at the same angle is avoided. In addition, the display content of the original pixel point can be changed through pixel movement. The invention adopts the various methods of dynamic pixel compensation and pixel movement to effectively improve the problem of afterimage of liquid crystal display.
It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (8)
1. A method for improving the afterimage of a liquid crystal display is characterized in that: which comprises the following steps:
step 1, the display scaler IC detects the input signal of the display card,
step 2, judging whether the input signal of the display card has a static display part; if yes, obtaining the contrast difference of the whole or local part of the still picture and executing the step 3; otherwise, closing the pixel adjusting function and executing the step 2;
and 3, detecting and acquiring a still picture and the contrast difference of the picture by the display scaler IC, and performing pixel point adjustment on the still picture based on the contrast of the picture, wherein the pixel point adjustment comprises low-resolution pixel dynamic compensation and pixel point movement adjustment.
2. The method of claim 1, wherein the step of reducing the image sticking comprises: the dynamic compensation method of the low-resolution pixels in the step 3 comprises the following steps: the resolution of the display is dynamically reduced, pixel dynamic compensation is carried out under low resolution, and the liquid crystal always keeps a deflection motion state by rapidly switching the driving voltage of a pixel point to be simulated.
3. The method according to claim 1 or 2, wherein the step of improving the image sticking of the liquid crystal display comprises: and 3, when the low-resolution pixels are dynamically compensated, the contrast of the pixels of the still picture is reduced by regularly adjusting the whole pixels of the picture according to a certain proportion through a timer in the scaler IC.
4. The method of claim 3, wherein the step of reducing the image sticking comprises: the specific steps for adjusting and reducing the contrast of the still picture pixel points according to a certain proportion are as follows: the pixel points with the bright order above 240 orders and the pixel points with the dark order below 40 orders in the static picture are reduced in equal proportion, the deflection angle of the liquid crystal is changed, and the liquid crystal passivation caused by long-time use at the same angle is avoided.
5. The method of claim 1, wherein the step of reducing the image sticking comprises: the pixel point movement adjusting method in the step 3 comprises the following steps: the pixel points of the display content of the still picture are moved and adjusted according to the set direction.
6. The method according to claim 1 or 5, wherein the step of improving the image sticking of the LCD comprises: and 3, when the pixel point is adjusted in a moving way, adjusting at least one pixel point in any direction from top to bottom and from left to right on the pixel point of the display content of the still picture so as to change the display content of the original pixel point.
7. The method of claim 6, wherein: and 3, when the pixel point movement adjusting method is used, pixel point movement adjustment is carried out on the picture at regular time through a timer in the scaler IC.
8. The method of claim 1, wherein the step of reducing the image sticking comprises: in the case of displaying a still picture for a long time, the adjustment level is set by an OSD menu.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010842209.8A CN111933089A (en) | 2020-08-20 | 2020-08-20 | Method for improving LCD residual image |
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| CN202010842209.8A CN111933089A (en) | 2020-08-20 | 2020-08-20 | Method for improving LCD residual image |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024000279A1 (en) * | 2022-06-29 | 2024-01-04 | 京东方科技集团股份有限公司 | Display panel and display method therefor, and display apparatus |
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| CN106097970A (en) * | 2016-08-10 | 2016-11-09 | 深圳市华星光电技术有限公司 | A kind of driving method reducing AMOLED display ghost and drive system |
| CN108628564A (en) * | 2018-05-04 | 2018-10-09 | 深圳创维－Rgb电子有限公司 | Eliminate method, apparatus, storage medium and the display terminal of display screen ghost |
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2020
- 2020-08-20 CN CN202010842209.8A patent/CN111933089A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000338947A (en) * | 1999-05-26 | 2000-12-08 | Nec Corp | Image display control device and burn-in prevention method used therefor and storage medium storing its control program |
| KR20040063567A (en) * | 2003-01-08 | 2004-07-14 | 엘지전자 주식회사 | Method for preventing image sticking on a image display device using pdp module |
| CN101777315A (en) * | 2009-01-13 | 2010-07-14 | 深圳Tcl新技术有限公司 | Method for avoiding image retention of liquid crystal display |
| CN104821160A (en) * | 2015-05-12 | 2015-08-05 | 深圳市华星光电技术有限公司 | Method for controlling image display |
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| WO2024000279A1 (en) * | 2022-06-29 | 2024-01-04 | 京东方科技集团股份有限公司 | Display panel and display method therefor, and display apparatus |
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Application publication date: 20201113 |
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