CN117594025A - Image brightness compensation method, display device and storage medium - Google Patents

Image brightness compensation method, display device and storage medium Download PDF

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Publication number
CN117594025A
CN117594025A CN202311579802.8A CN202311579802A CN117594025A CN 117594025 A CN117594025 A CN 117594025A CN 202311579802 A CN202311579802 A CN 202311579802A CN 117594025 A CN117594025 A CN 117594025A
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Prior art keywords
value
gray
pixel
compensation
pixels
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常小幻
吴国强
胡元洲
王碧霖
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Priority to CN202311579802.8A priority Critical patent/CN117594025A/en
Publication of CN117594025A publication Critical patent/CN117594025A/en
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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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • 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
    • G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The embodiment of the application provides an image brightness compensation method, display equipment and a storage medium, wherein the display equipment comprises a crosstalk compensation control module, a source driving module and a display module, wherein the crosstalk compensation control module is used for acquiring gray scale values of pixel points in an ith row of pixels in image data to be displayed and calculating gray scale difference values of maximum gray scale values and minimum gray scale values in the ith row of pixels; if the gray level difference value is larger than a preset difference value threshold value, controlling a source driving module to carry out brightness compensation on the ith row of pixels; the display module is used for displaying the image data to be displayed after the brightness compensation. Whether brightness compensation is carried out or not is determined according to the difference of the line data, so that the in-plane crosstalk can be effectively improved, the occurrence of the situation of picture distortion caused by crosstalk when an image is displayed is further slowed down, and the display effect of the image is improved.

Description

Image brightness compensation method, display device and storage medium
Technical Field
The present invention relates to the field of image processing technologies, and in particular, to an image brightness compensation method, a display device, and a storage medium.
Background
With the rapid development of displays, the requirements of high resolution, wide viewing angle, high response speed, high aperture ratio and the like of products are put forward higher requirements on the display quality of the devices. As the pixel size becomes smaller, the line pitch becomes smaller, and when current passes through the signal lines, the interference of the induced electric field between the lines becomes more prominent, thereby greatly affecting the product yield and display effect. Therefore, how to improve crosstalk is a significant problem to be solved urgently.
Disclosure of Invention
An embodiment of the invention aims to provide an image brightness compensation method, display equipment and a storage medium, so as to effectively improve in-plane crosstalk, further reduce the occurrence of the situation of picture distortion caused by crosstalk when displaying images and improve the display effect of the images. The specific technical scheme is as follows:
in a first aspect, embodiments of the present application provide a display device, including:
the device comprises a crosstalk compensation control module, a source driving module and a display module;
the crosstalk compensation control module is used for obtaining a gray scale value of a pixel point in an ith row of pixels in image data to be displayed, wherein i is a positive integer; calculating a gray scale difference value of a maximum gray scale value and a minimum gray scale value in the ith row of pixels; if the gray level difference value is larger than a preset difference value threshold value, controlling the source driving module to carry out brightness compensation on the ith row of pixels; the display module is used for displaying the image data to be displayed after brightness compensation.
In a possible embodiment, the crosstalk compensation control module is specifically configured to determine whether the gray level difference value is greater than a preset difference threshold; and if the gray level difference value is larger than a preset difference value threshold value, controlling the source driving module to perform gray level compensation or data voltage compensation on the ith row of pixels.
In a possible embodiment, the crosstalk compensation control module is specifically configured to divide an ith row of pixels in the image data to be displayed into n segments of pixels, where n is an integer, n is equal to or greater than 2 and equal to or less than Y, Y is the number of pixels in the ith row of pixels, the gray scale values of the pixels in the same segment are the same, and the gray scale values of the pixels in adjacent segments are different; and acquiring the gray scale value of each pixel segment in the ith row of pixels.
In a possible embodiment, the crosstalk compensation control module is specifically configured to obtain an actual display brightness value of the display; inquiring a first predetermined corresponding relation according to the actual display brightness value and the gray scale value of each pixel section to respectively obtain the gray scale compensation value of each pixel section; the first corresponding relation is the corresponding relation between the gray scale value and the gray scale compensation value under different display brightness values; and controlling the source driving module to perform gray-scale compensation on any pixel segment by using the gray-scale compensation value of the pixel segment.
In a possible embodiment, the crosstalk compensation control module is specifically configured to obtain, for each pixel segment, a data voltage value corresponding to a gray-scale value of the pixel segment; inquiring a second predetermined corresponding relation according to the data voltage value of the pixel section to obtain a voltage compensation value of the pixel section; the second corresponding relation is the corresponding relation between the data voltage value and the voltage compensation value; and controlling the source driving module to perform data voltage compensation on the pixel segment by using the voltage compensation value of the pixel segment.
In a second aspect, there is provided an image brightness compensation method, the method comprising:
acquiring a gray scale value of a pixel point in an ith row of pixels in image data to be displayed, wherein i is a positive integer;
calculating a gray scale difference value of a maximum gray scale value and a minimum gray scale value in the ith row of pixels;
if the gray level difference value is larger than a preset difference value threshold value, performing brightness compensation on the ith row of pixels;
and displaying the image data to be displayed after the brightness compensation.
In one possible embodiment, if the gray level difference value is greater than a preset difference threshold, performing brightness compensation on the pixel in the i line includes:
judging whether the gray level difference value is larger than a preset difference value threshold value or not;
and if the gray level difference value is larger than a preset difference value threshold value, performing gray level compensation or data voltage compensation on the ith row of pixels.
In one possible embodiment, the acquiring the gray-scale value of the pixel point in the pixel in the ith row in the image data to be displayed includes:
dividing an ith row of pixels in image data to be displayed into n sections of pixel sections, wherein n is an integer, n is more than or equal to 2 and less than or equal to Y, Y is the number of pixel points in the ith row of pixels, the gray scale values of all the pixel points in the same pixel section are the same, and the gray scale values of the pixel points in adjacent pixel sections are different;
And acquiring the gray scale value of each pixel segment in the ith row of pixels.
In one possible embodiment, if the gray level difference value is greater than a preset difference threshold, performing brightness compensation on the pixel in the i line includes:
acquiring an actual display brightness value of a display;
inquiring a first predetermined corresponding relation according to the actual display brightness value and the gray scale value of each pixel section to respectively obtain the gray scale compensation value of each pixel section; the first corresponding relation is the corresponding relation between the gray scale value and the gray scale compensation value under different display brightness values;
and for any pixel segment, performing gray-scale compensation on the pixel segment by using the gray-scale compensation value of the pixel segment.
In one possible embodiment, the gray-scale compensation value ranges from 0 gray scale to 31 gray scale.
In one possible embodiment, the performing gray-scale compensation on any pixel segment by using the gray-scale compensation value of the pixel segment includes:
for the nth pixel segment, the gray scale value of the pixel point of the segment is compensated by using the following formula:
Seg_n_Gray_output＝Seg_n_gray+△gray
the seg_n_gray_output is a Gray level value after compensation of the nth pixel segment, seg_n_gray is a Gray level value of the nth pixel segment in the image data to be displayed, and Δgray is a Gray level compensation value of the nth pixel segment.
In one possible embodiment, the first correspondence is predetermined by:
acquiring brightness values of a plurality of preset binding point displays;
for each preset binding point display brightness value, displaying sample gray-scale image data under the preset binding point display brightness value by using a display, wherein the difference value between the maximum gray-scale value and the minimum gray-scale value in the j-th row of pixels in the sample gray-scale image data is larger than a preset difference value threshold;
acquiring a gray scale value of each sample pixel section in a j-th row of pixels, and adjusting a gray scale compensation value of each pixel section until no crosstalk phenomenon exists, wherein j is a positive integer;
adding the corresponding relation between the gray scale value and the gray scale compensation value under the preset binding point display brightness value into a first corresponding relation;
and calculating the corresponding relation between the gray scale value and the gray scale compensation value under the display brightness value between the display brightness values of two adjacent preset binding points by an interpolation method, and adding the corresponding relation into the first corresponding relation.
In a possible embodiment, the R pixel, the G pixel, and the B pixel respectively correspond to the respective first correspondence.
In one possible embodiment, if the gray level difference value is greater than a preset difference threshold, performing brightness compensation on the pixel in the i line includes:
For each pixel segment, acquiring a data voltage value corresponding to a gray scale value of the pixel segment;
inquiring a second predetermined corresponding relation according to the data voltage value of the pixel section to obtain a voltage compensation value of the pixel section; the second corresponding relation is the corresponding relation between the data voltage value and the voltage compensation value;
and carrying out data voltage compensation on the pixel segment by utilizing the voltage compensation value of the pixel segment.
In one possible embodiment, the voltage compensation value ranges from 0 to 12 volts, and the compensated data voltage value ranges from gamma voltage.
In one possible embodiment, the performing data voltage compensation on the pixel segment by using the voltage compensation value of the pixel segment includes:
the data voltage compensation is performed on the nth pixel segment by using the following formula:
Output＝Seg_n_gray_data+△v
the Output is the data voltage compensated by the nth pixel segment, seg_n_gray_data is the data voltage value of the nth pixel segment in the image data to be displayed, and Δv is the voltage compensation value of the nth pixel segment.
In a possible embodiment, the R pixel, the G pixel, and the B pixel respectively correspond to the respective second correspondence.
In a third aspect, embodiments of the present application further provide a computer readable storage medium having at least one computer program stored therein, the computer program being loaded and executed by a processor to implement the image brightness compensation method.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides an image brightness compensation method, display equipment and a storage medium, wherein the display equipment comprises a crosstalk compensation control module, a source driving module and a display module, wherein the crosstalk compensation control module is used for acquiring gray scale values of pixel points in an ith row of pixels in image data to be displayed and calculating gray scale difference values of maximum gray scale values and minimum gray scale values in the ith row of pixels; if the gray level difference value is larger than a preset difference value threshold value, controlling a source driving module to carry out brightness compensation on the ith row of pixels; the display module is used for displaying the image data to be displayed after the brightness compensation. Whether brightness compensation is carried out or not is determined according to the difference of the line data, so that the in-plane crosstalk can be effectively improved, the occurrence of the situation of picture distortion caused by crosstalk when an image is displayed is further slowed down, and the display effect of the image is improved.
Of course, it is not necessary for any one product or method of practicing the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and other embodiments may be obtained according to these drawings to those skilled in the art.
Fig. 1 is a schematic diagram of a display device according to an embodiment of the present application;
fig. 2 is a schematic diagram of dividing an ith row of pixels in image data to be displayed into n segments of pixels according to an embodiment of the present application;
FIG. 3 is a flowchart of an image brightness compensation method according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a corresponding relationship between a gray scale value and a gray scale compensation value for different binding point display luminance values according to an embodiment of the present disclosure;
FIG. 5 is another flowchart of an image brightness compensation method according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, those of ordinary skill in the art will be able to devise all other embodiments that are obtained based on this application and are within the scope of the present invention.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one way of describing an association of associated objects, meaning that there may be three relationships, e.g., a and/or b, which may represent: the first and second cases exist separately, and the first and second cases exist separately. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The terms appearing in the present application are explained first below:
crosstalk: in the development of thin film transistor displays, crosstalk is defined as a picture display anomaly. That is, a part of the area on the entire display screen is affected by another part of the area, and the screen is distorted. The crosstalk can be easily observed when the background is in the middle gray level, and particularly, the crosstalk around the black block can be obviously observed when the black block is displayed in the middle under the white picture background. There are two types of crosstalk that are common, horizontal crosstalk and vertical crosstalk. The background is gray scale, the middle is black square, and the peripheral area of the black square is divided into an upper area, a lower area, a left area and a right area according to the positions. When the upper and lower areas become darker under the influence of the black square, it is called vertical crosstalk; the horizontal crosstalk is referred to when the left and right areas become brighter under the influence of the black square.
In the related art, in the display device, it is often first determined whether crosstalk of any line of data in the image data is serious, when it is determined that the crosstalk of the line of data is serious, a gray-scale value of a pixel point in the line is compared with a gray-scale value of a pixel point in an adjacent line, and a corresponding gray-scale compensation value is determined based on a difference between the gray-scale value and the gray-scale compensation value, so that brightness compensation is performed on the pixel point in the line by using the gray-scale compensation value. However, if there is no difference between the gray scale value of the pixel point in the row and the gray scale value of the pixel point in the adjacent row, no brightness compensation is performed. In this way, the situation "distortion of the picture due to crosstalk at the time of image display" is caused to frequently occur.
The following describes an implementation environment related to the embodiments of the present application:
the implementation environment related to the image brightness compensation method provided by the embodiment of the application includes a display device, which may be a computer, or may be a mobile terminal device with a display function, such as a smart phone, a tablet computer, an electronic book reader, a portable computer, etc., which is not limited in this application.
Next, a detailed description is given of an image brightness compensation method and a display device provided in the embodiments of the present application:
Referring to fig. 1, the embodiment of the present application provides a display device including a crosstalk compensation control module 101, a source driving module 102, and a display module 103, where the crosstalk compensation control module 101, the source driving module 102, and the display module 103 are connected.
The crosstalk compensation control module 101 is configured to obtain a gray-scale value of a pixel point in an ith row of pixels in image data to be displayed, where i is a positive integer; calculating a gray scale difference value of a maximum gray scale value and a minimum gray scale value in the ith row of pixels; if the gray level difference value is greater than the preset difference value threshold, controlling the source driving module 102 to perform brightness compensation on the ith row of pixels; the display module 103 is configured to display the brightness-compensated image data to be displayed.
In one possible embodiment, the image data to be displayed may be a picture local to the display device, a picture downloaded by the user from the internet, a video screenshot, and the like, which is not limited in this application.
In one possible embodiment, the image data to be displayed may be a color image or a black-and-white image. In one example, when the image data to be displayed is a color image, the gray-scale value (luminance value) of the pixel may be calculated directly based on the R (red) luminance value, G (green) luminance value, and B (blue) luminance value of the pixel in the color image; the format conversion can be performed on the image data to be displayed to obtain a black-and-white image, so as to obtain the gray scale value of the black-and-white image. The specific manner of obtaining the gray scale values of the pixels in the image data can be referred to in the prior art, and the description is omitted herein.
The ith row of pixels may be any row of pixels in the image data to be displayed, and the same operation as that of the ith row of pixels may be performed for any row of pixels in the image data to be displayed. The preset difference threshold may be obtained according to an actual model test of the display, and in a possible embodiment, the preset difference threshold needs to be set according to a product characteristic of the display device, and the value range is generally 64-128.
The Source driving module is used for controlling the display brightness of the pixels, and the crosstalk compensation control module can control the Source driving module to perform brightness compensation on the ith row of pixels. The brightness compensation can be realized by changing gamma voltage, data voltage, display gray scale and the like. In one possible embodiment, the crosstalk compensation control module 101 is specifically configured to control the source driving module to perform gray-scale compensation or data voltage compensation on the i-th row of pixels if the gray-scale difference value is greater than a preset difference threshold. In one example, when the gray level difference value is greater than the preset difference value threshold, the source driving module may be controlled to decrease the gray level value of the high gray level pixel or increase the data voltage of the high gray level pixel, and increase the gray level value of the low gray level pixel or decrease the data voltage of the low gray level pixel, so as to alleviate the crosstalk phenomenon.
In a possible embodiment, the crosstalk compensation control module 101 is specifically configured to divide an ith row of pixels in image data to be displayed into n segments of pixels, where n is an integer, n is equal to or greater than 2 and equal to or less than Y, Y is the number of pixels in the ith row of pixels, the gray scale values of the pixels in the same segment are the same, and the gray scale values of the pixels in adjacent segments are different; and acquiring the gray scale value of each pixel segment in the ith row of pixels.
In one possible embodiment, the gray scale values of the pixels in each row of pixels in the image data to be displayed may be different, so in this application, the crosstalk compensation control module 101 may divide the row of pixels into n segments of pixels in order from left to right based on the gray scale values of the row of pixels. For example, referring to fig. 2, the line of pixels is divided into 3 segments, which are Seg1 segment, seg2 segment, and Seg3 segment, where gray=0 for the Seg1 segment, which ranges from the first pixel point of the line to the 200 th pixel point of the line, and the position information is recorded as follows: start=1, end=200; the Gray level value gray=127 of Seg2 segment ranges from the 201 st pixel point of the row to the 600 th pixel point of the row, and records the position information as follows: start=201, end=600; the Gray level value gray=0 of Seg3 segment ranges from the 601 st pixel point of the row to the 800 th pixel point of the row, and records the position information as follows: start=601, end=800.
In the embodiment of the application, the brightness compensation is performed by dividing the pixel segments, so that the calculated amount can be reduced and the system resources can be saved compared with the brightness compensation performed for each pixel point.
In one possible embodiment, the crosstalk compensation control module 101 is specifically configured to obtain an actual display brightness value of the display; inquiring a first predetermined corresponding relation according to the brightness value of the actual display and the gray scale value of each pixel section to respectively obtain the gray scale compensation value of each pixel section; the first corresponding relation is the corresponding relation between the gray scale value and the gray scale compensation value under different display brightness values; for any pixel segment, the control source driving module 102 performs gray-scale compensation on the pixel segment by using the gray-scale compensation value of the pixel segment.
The first correspondence may be a pre-established correspondence between a gray level value and a gray level compensation value under different display brightness values, and the first correspondence may be obtained through experimental measurement, specifically related to an actual light emitting brightness of the display, in an example, the first correspondence may be as shown in fig. 4, where Band1 and Band dm represent different display brightness values, gray represents a gray level value, and Δgray_comp represents a gray level compensation value.
In a possible embodiment, the crosstalk compensation control module 101 is specifically configured to obtain, for each pixel segment, a data voltage value corresponding to a gray-scale value of the pixel segment; inquiring a second predetermined corresponding relation according to the data voltage value of the pixel section to obtain a voltage compensation value of the pixel section; the second corresponding relation is the corresponding relation between the data voltage value and the voltage compensation value; the control source driving module 102 performs data voltage compensation on the pixel segment by using the voltage compensation value of the pixel segment.
In one possible embodiment, the display panel may be generally classified into 0 to 255 gray scales, wherein the 0 gray scale displays the lowest brightness, and the corresponding voltage is the highest voltage of gamma voltage, which is expressed as: VGMP; the brightness of the 255 gray scale display is highest, and the corresponding voltage is the lowest voltage of gamma voltage, which is marked as: VGSP. The data voltage corresponding to each gray level can be obtained according to the following formula:
wherein V is data The DATA voltage corresponding to the gray scale is represented, VGMP represents the highest voltage of the gamma voltage, VGSP represents the lowest voltage of the gamma voltage, and DATA represents the gray scale.
The second corresponding relation is the corresponding relation between the data voltage value and the voltage compensation value, and the second corresponding relation can be obtained through experimental measurement and is particularly related to the actual luminous brightness of the display. In one example, the high gray pixel may decrease the brightness by increasing the data voltage, and the low gray pixel may decrease the brightness by decreasing the data voltage to mitigate the crosstalk phenomenon.
In one possible embodiment, the crosstalk compensation control module 101 includes: the data sampling unit 1011, the data calculating unit 1012, and the data compensating unit 1013 are connected to the data sampling unit 1011, the data calculating unit 1012, and the data compensating unit 1013. The data sampling unit 1011 is used for obtaining the gray scale value of the pixel point in the ith row of pixels in the image data to be displayed; the data calculating unit 1012 is used for calculating a gray scale difference value between a maximum gray scale value and a minimum gray scale value in the ith row of pixels; judging whether the gray level difference value is larger than a preset difference value threshold value or not; when the gray level difference value is greater than the preset difference value threshold, the data compensation unit 1013 controls the source driving module 102 to perform brightness compensation on the i-th row of pixels; the display module 103 is configured to display the brightness-compensated image data to be displayed.
In the display device provided by the embodiment of the application, the display device comprises a crosstalk compensation control module, a source driving module and a display module, wherein the crosstalk compensation control module is used for acquiring a gray scale value of a pixel point in an ith row of pixels in image data to be displayed, wherein i is a positive integer; calculating a gray scale difference value of a maximum gray scale value and a minimum gray scale value in the ith row of pixels; if the gray level difference value is larger than a preset difference value threshold value, controlling a source driving module to carry out brightness compensation on the ith row of pixels; the display module is used for displaying the image data to be displayed after the brightness compensation. Whether brightness compensation is carried out or not is determined according to the difference of the line data, so that the in-plane crosstalk can be effectively improved, the occurrence of the situation of picture distortion caused by crosstalk when an image is displayed is further slowed down, and the display effect of the image is improved.
Referring to fig. 3, fig. 3 is a flowchart of an image brightness compensation method according to an embodiment of the present application, and the method includes the following steps.
S301, acquiring a gray scale value of a pixel point in an ith row of pixels in image data to be displayed, wherein i is a positive integer.
In one possible embodiment, the image data to be displayed may be a picture local to the display device, a picture downloaded by the user from the internet, a video screenshot, and the like, which is not limited in this application.
In one possible embodiment, the image data to be displayed may be a color image or a black-and-white image. In one example, when the image data to be displayed is a color image, the gray-scale value (luminance value) of the pixel may be calculated directly based on the R (red) luminance value, G (green) luminance value, and B (blue) luminance value of the pixel in the color image; the format conversion can be performed on the image data to be displayed to obtain a black-and-white image, so as to obtain the gray scale value of the black-and-white image. The specific manner of obtaining the gray scale values of the pixels in the image data can be referred to in the prior art, and the description is omitted herein.
In a possible embodiment, the obtaining of the gray scale value of the pixel point in the ith row of pixels in the image data to be displayed may be obtaining the pixel value of each pixel point in the ith row of pixels, or may be dividing the ith row of pixels in the image data to be displayed into n segments of pixels, where n is an integer, n is equal to or less than 2 and Y, Y is the number of the pixel points in the ith row of pixels, the gray scale values of the pixel points in the same pixel segment are the same, and the gray scale values of the pixel points in adjacent pixel segments are different; and acquiring the gray scale value of each pixel segment in the ith row of pixels. For example, the i-th row of pixels is divided into n-segment pixel segments in order from left to right based on the gray scale values.
The ith row of pixels may be any row of pixels in the image data to be displayed, and the same operation as that of the ith row of pixels may be performed for any row of pixels in the image data to be displayed.
For example, referring to fig. 2, the line of pixels is divided into 3 segments, which are Seg1 segment, seg2 segment, and Seg3 segment, where gray=0 for the Seg1 segment, which ranges from the first pixel point of the line to the 200 th pixel point of the line, and the position information is recorded as follows: start=1, end=200; the Gray level value gray=127 of Seg2 segment ranges from the 201 st pixel point of the row to the 600 th pixel point of the row, and records the position information as follows: start=201, end=600; the Gray level value gray=0 of Seg3 segment ranges from the 601 st pixel point of the row to the 800 th pixel point of the row, and records the position information as follows: start=601, end=800.
S302, calculating a gray scale difference value between a maximum gray scale value and a minimum gray scale value in the ith row of pixels.
In one possible embodiment, when the gray-scale value of the pixel point in the ith row of pixels in the image data to be displayed is obtained, the maximum gray-scale value and the minimum gray-scale value in the ith row of pixels can be found by traversing each pixel point in the ith row of pixels. When the gray scale value of the pixel point in the ith row of pixels in the image data to be displayed is obtained, the maximum gray scale value and the minimum gray scale value in the ith row of pixels can be found by traversing each section of pixel point in the ith row of pixels. And then, calculating the difference value of the maximum gray level value and the minimum gray level value based on the determined maximum gray level value and the minimum gray level value in the ith row of pixel points to obtain a gray level difference value.
S303, if the gray level difference value is larger than the preset difference value threshold value, performing brightness compensation on the pixel of the ith row.
In one possible embodiment, if the gray level difference value is greater than the preset difference threshold value, performing brightness compensation on the pixel in the i line includes: judging whether the gray level difference value is larger than a preset difference value threshold value or not; and if the gray level difference value is larger than the preset difference value threshold value, performing gray level compensation or data voltage compensation on the ith row of pixels.
In one possible embodiment, the gray level difference value is compared with a preset difference threshold; if the gray level difference value is not greater than the preset difference value threshold value, the brightness compensation of the ith row of pixels is not needed; if the gray level difference value is greater than the preset difference value threshold, the brightness compensation is required for the pixel in the ith row.
In one possible embodiment, the preset difference threshold may be obtained according to an actual model test of the display, where the preset difference threshold needs to be set according to a product characteristic of the display device, and the value range is generally 64-128.
In one possible embodiment, if the gray level difference value is greater than the preset difference threshold value, performing brightness compensation on the pixel in the i line includes: acquiring an actual display brightness value of a display; inquiring a first predetermined corresponding relation according to the brightness value of the actual display and the gray scale value of each pixel section to respectively obtain the gray scale compensation value of each pixel section; the first corresponding relation is the corresponding relation between the gray scale value and the gray scale compensation value under different display brightness values; and for any pixel segment, performing gray-scale compensation on the pixel segment by using the gray-scale compensation value of the pixel segment.
In one possible embodiment, the gray-scale compensation value ranges from 0 to 31 gray-scales.
In one possible embodiment, for any pixel segment, performing gray-scale compensation on the pixel segment by using the gray-scale compensation value of the pixel segment includes:
for the nth pixel segment, the gray scale value of the pixel point of the segment is compensated by using the following formula:
Seg_n_Gray_output＝Seg_n_gray+△gray
the seg_n_gray_output is a Gray level value after compensation of the nth pixel segment, seg_n_gray is a Gray level value of the nth pixel segment in the image data to be displayed, and Δgray is a Gray level compensation value of the nth pixel segment.
In one possible embodiment, the first correspondence is predetermined by:
acquiring brightness values of a plurality of preset binding point displays; for each preset binding point display brightness value, displaying sample gray-scale image data under the preset binding point display brightness value by using a display, wherein the difference value between the maximum gray-scale value and the minimum gray-scale value in the j-th row of pixels in the sample gray-scale image data is larger than a preset difference value threshold; acquiring a gray scale value of each sample pixel section in a j-th row of pixels, and adjusting a gray scale compensation value of each pixel section until no crosstalk phenomenon exists, wherein j is a positive integer; adding the corresponding relation between the gray scale value and the gray scale compensation value under the preset binding point display brightness value into a first corresponding relation; and calculating the corresponding relation between the gray scale value and the gray scale compensation value under the display brightness value between the display brightness values of two adjacent preset binding points by an interpolation method, and adding the corresponding relation into the first corresponding relation.
Referring to fig. 4, fig. 4 is a schematic diagram of a correspondence between gray-scale values and gray-scale compensation values for different binding point display brightness values, which is used to represent gray-scale compensation values Δgray_comp corresponding to different gray-scale values gray for different binding point display brightness values. Wherein, the horizontal axis represents the variable of gray scale value gray, the vertical axis represents the variable of gray scale compensation value delta gray_comp, and the curve represented by Band1 is the corresponding relation between different gray scale values and gray scale compensation values when the brightness value of the binding point display is Band 1; the curve represented by Bandm is the corresponding relation between different gray scale values and gray scale compensation values when the brightness value of the binding point display is Bandm. Based on the correspondence relationship shown in fig. 4, the output value of each segment is: seg_n_gray_output=seg_n_gray+. DELTA.gray_comp.
In a possible embodiment, the R pixel, the G pixel, and the B pixel respectively correspond to the respective first correspondence. That is, when performing luminance compensation on an image, compensation calculation needs to be performed for each of R pixels, G pixels, and B pixels.
In one possible embodiment, if the gray level difference value is greater than the preset difference threshold value, performing brightness compensation on the pixel in the i line includes:
for each pixel segment, acquiring a data voltage value corresponding to a gray scale value of the pixel segment; inquiring a second predetermined corresponding relation according to the data voltage value of the pixel section to obtain a voltage compensation value of the pixel section; the second corresponding relation is the corresponding relation between the data voltage value and the voltage compensation value; and carrying out data voltage compensation on the pixel segment by utilizing the voltage compensation value of the pixel segment.
In one possible embodiment, the display panel may be generally classified into 0 to 255 gray scales, wherein the 0 gray scale displays the lowest brightness, and the corresponding voltage is the highest voltage of gamma voltage, which is expressed as: VGMP; the brightness of the 255 gray scale display is highest, and the corresponding voltage is the lowest voltage of gamma voltage, which is marked as: VGSP. The data voltage corresponding to each gray level can be obtained according to the following formula:
wherein V is data The DATA voltage corresponding to the gray scale is represented, VGMP represents the highest voltage of the gamma voltage, VGSP represents the lowest voltage of the gamma voltage, and DATA represents the gray scale.
In one possible embodiment, the voltage compensation value is in the range of 0-12 volts, and the compensated data voltage value is in the gamma voltage range.
In one possible embodiment, when the compensated data voltage value is less than the minimum value in the gamma voltage range, determining the compensated data voltage value as the minimum value in the gamma voltage range; and when the compensated data voltage value is larger than the maximum value in the gamma voltage range, determining the compensated data voltage value as the maximum value in the gamma voltage range.
In one possible embodiment, performing data voltage compensation on the pixel segment using the voltage compensation value of the pixel segment includes:
The data voltage compensation is performed on the nth pixel segment by using the following formula:
Output＝Seg_n_gray_data+△v
the Output is the data voltage compensated by the nth pixel segment, seg_n_gray_data is the data voltage value of the nth pixel segment in the image data to be displayed, and Δv is the voltage compensation value of the nth pixel segment.
In a possible embodiment, the R pixel, the G pixel, and the B pixel respectively correspond to the respective second correspondence. That is, when performing luminance compensation on an image, compensation calculation needs to be performed for each of R pixels, G pixels, and B pixels.
S304, displaying the image data to be displayed after brightness compensation.
In one possible embodiment, the brightness-compensated image data to be displayed is displayed by a display device.
According to the technical scheme provided by the embodiment of the application, the gray scale value of the pixel point in the ith row of pixels in the image data to be displayed is obtained, wherein i is a positive integer; calculating a gray scale difference value of a maximum gray scale value and a minimum gray scale value in the ith row of pixels; if the gray level difference value is larger than a preset difference value threshold value, performing brightness compensation on the pixel of the ith row; and displaying the image data to be displayed after the brightness compensation. Whether brightness compensation is carried out or not is determined according to the difference of the line data, so that the in-plane crosstalk can be effectively improved, the occurrence of the situation of picture distortion caused by crosstalk when an image is displayed is further slowed down, and the display effect of the image is improved.
When the image brightness compensation method of the embodiment of the present application is applied, when the display displays the image data shown in fig. 2, in which the image data seg1 segment gray=0, seg2 segment gray=127, and seg3 segment gray=0. When the technical scheme provided by the embodiment of the application determines that the brightness compensation needs to be performed on the pixels in the image data to be displayed, the voltage of the seg2 section in the display changes, and specifically, the brightness of the seg2 section needs to be reduced, so that the voltage value of the seg2 section is increased compared with the standard voltage value of 127 gray scales. When the technical scheme provided by the embodiment of the application determines that the brightness compensation of the ith row of pixels in the image data to be displayed is not needed, the source voltage of the seg2 section in the row cannot be changed. Thus, it is possible to determine whether the image data to be displayed is brightness-compensated image data to be displayed.
Referring to fig. 5, fig. 5 is a flowchart of an image brightness compensation method according to an embodiment of the present application, which specifically includes the following steps.
Step 1: carrying out sectional sampling on a row of gray scale values;
step 2: respectively recording gray scale value and position information of each section, and recording Seg sections: n_gray=0 to 255, position: start=n_start, end=n_end;
Step 3: finding out the maximum gray level value and the minimum gray level value of the line, and calculating a gray level difference value, wherein Δgray=max_gray-min_gray;
step 4: judging the magnitude relation between the gray level difference value (delta gray) and a preset difference value threshold (Thresh);
step 5: if Δgray is not greater than Thresh, this line does not need compensation; jump to step 6; if Δgray is greater than Thresh, this line needs compensation; jump to step 7.
Step 6: without compensation, output = n_gray;
step 7: compensation is performed, output=seg_n_gray+Δgray, or output=seg_n_gray_data+Δv.
The embodiment of the invention also provides an electronic device, as shown in fig. 6, which comprises a processor 601, a communication interface 602, a memory 603 and a communication bus 604, wherein the processor 601, the communication interface 602 and the memory 603 complete communication with each other through the communication bus 604,
a memory 603 for storing a computer program;
the processor 601 is configured to execute the program stored in the memory 603, and implement the following steps:
acquiring a gray scale value of a pixel point in an ith row of pixels in image data to be displayed, wherein i is a positive integer; calculating a gray scale difference value of a maximum gray scale value and a minimum gray scale value in the ith row of pixels; if the gray level difference value is larger than a preset difference value threshold value, performing brightness compensation on the pixel of the ith row; and displaying the image data to be displayed after the brightness compensation.
The communication bus mentioned above for the electronic devices may be a peripheral component interconnect standard (Peripheral Component Interconnect, PCI) bus or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, etc. The communication bus may be classified as an address bus, a data bus, a control bus, or the like. For ease of illustration, the figures are shown with only one bold line, but not with only one bus or one type of bus.
The communication interface is used for communication between the electronic device and other devices.
The Memory may include random access Memory (Random Access Memory, RAM) or may include Non-Volatile Memory (NVM), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the aforementioned processor.
The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but also digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
In yet another embodiment of the present invention, there is also provided a computer-readable storage medium having stored therein a computer program which, when executed by a processor, implements the steps of any of the above-described image brightness compensation methods.
In yet another embodiment of the present invention, there is also provided a computer program product containing instructions that, when run on a computer, cause the computer to perform any of the image brightness compensation methods of the above embodiments.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present invention, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the method, the display device, the storage medium embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference is made to the description of the method embodiments for relevant points.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims (18)

1. A display device, the display device comprising:
the device comprises a crosstalk compensation control module, a source driving module and a display module;
the crosstalk compensation control module is used for: acquiring a gray scale value of a pixel point in an ith row of pixels in image data to be displayed, wherein i is a positive integer; calculating a gray scale difference value of a maximum gray scale value and a minimum gray scale value in the ith row of pixels; if the gray level difference value is larger than a preset difference value threshold value, controlling the source driving module to carry out brightness compensation on the ith row of pixels;
the display module is used for displaying the image data to be displayed after brightness compensation.
2. The display device according to claim 1, wherein the crosstalk compensation control module is specifically configured to determine whether the gray level difference value is greater than a preset difference threshold; and if the gray level difference value is larger than a preset difference value threshold value, controlling the source driving module to perform gray level compensation or data voltage compensation on the ith row of pixels.
3. The display device according to claim 1, wherein the crosstalk compensation control module is specifically configured to divide an ith row of pixels in image data to be displayed into n segments of pixels, where n is an integer, n is 2 and less than or equal to Y, Y is the number of pixels in the ith row of pixels, gray scale values of each pixel in the same segment are the same, and gray scale values of pixels in adjacent segments are different; and acquiring the gray scale value of each pixel segment in the ith row of pixels.
4. A display device according to claim 3, wherein the crosstalk compensation control module is specifically configured to obtain an actual display luminance value of the display; inquiring a first predetermined corresponding relation according to the actual display brightness value and the gray scale value of each pixel section to respectively obtain the gray scale compensation value of each pixel section; the first corresponding relation is the corresponding relation between the gray scale value and the gray scale compensation value under different display brightness values; and controlling the source driving module to perform gray-scale compensation on any pixel segment by using the gray-scale compensation value of the pixel segment.
5. The display device according to claim 3, wherein the crosstalk compensation control module is specifically configured to obtain, for each pixel segment, a data voltage value corresponding to a gray-scale value of the pixel segment; inquiring a second predetermined corresponding relation according to the data voltage value of the pixel section to obtain a voltage compensation value of the pixel section; the second corresponding relation is the corresponding relation between the data voltage value and the voltage compensation value; and controlling the source driving module to perform data voltage compensation on the pixel segment by using the voltage compensation value of the pixel segment.
6. A method of image brightness compensation, the method comprising:
acquiring a gray scale value of a pixel point in an ith row of pixels in image data to be displayed, wherein i is a positive integer;
calculating a gray scale difference value of a maximum gray scale value and a minimum gray scale value in the ith row of pixels;
if the gray level difference value is larger than a preset difference value threshold value, performing brightness compensation on the ith row of pixels;
and displaying the image data to be displayed after the brightness compensation.
7. The method of claim 6, wherein performing brightness compensation on the i-th row of pixels if the gray level difference is greater than a predetermined difference threshold comprises:
judging whether the gray level difference value is larger than a preset difference value threshold value or not;
and if the gray level difference value is larger than a preset difference value threshold value, performing gray level compensation or data voltage compensation on the ith row of pixels.
8. The method according to claim 6, wherein the acquiring the gray-scale value of the pixel point in the pixel in the i-th row in the image data to be displayed includes:
dividing an ith row of pixels in image data to be displayed into n sections of pixel sections, wherein n is an integer, n is more than or equal to 2 and less than or equal to Y, Y is the number of pixel points in the ith row of pixels, the gray scale values of all the pixel points in the same pixel section are the same, and the gray scale values of the pixel points in adjacent pixel sections are different;
And acquiring the gray scale value of each pixel segment in the ith row of pixels.
9. The method of claim 8, wherein performing brightness compensation on the i-th row of pixels if the gray level difference value is greater than a preset difference threshold value comprises:
acquiring an actual display brightness value of a display;
inquiring a first predetermined corresponding relation according to the actual display brightness value and the gray scale value of each pixel section to respectively obtain the gray scale compensation value of each pixel section; the first corresponding relation is the corresponding relation between the gray scale value and the gray scale compensation value under different display brightness values;
and for any pixel segment, performing gray-scale compensation on the pixel segment by using the gray-scale compensation value of the pixel segment.
10. The method of claim 9, wherein the gray-scale compensation value ranges from 0 gray scale to 31 gray scale.
11. The method of claim 9, wherein for any one of the pixel segments, gray-scale compensating the pixel segment with the gray-scale compensation value of the pixel segment comprises:
for the nth pixel segment, the gray scale value of the pixel point of the segment is compensated by using the following formula:
Seg_n_Gray_output＝Seg_n_gray+△gray
the seg_n_gray_output is a Gray level value after compensation of the nth pixel segment, seg_n_gray is a Gray level value of the nth pixel segment in the image data to be displayed, and Δgray is a Gray level compensation value of the nth pixel segment.
12. The method according to claim 9, wherein the first correspondence is predetermined by:
acquiring brightness values of a plurality of preset binding point displays;
for each preset binding point display brightness value, displaying sample gray-scale image data under the preset binding point display brightness value by using a display, wherein the difference value between the maximum gray-scale value and the minimum gray-scale value in the j-th row of pixels in the sample gray-scale image data is larger than a preset difference value threshold;
acquiring a gray scale value of each sample pixel section in a j-th row of pixels, and adjusting a gray scale compensation value of each pixel section until no crosstalk phenomenon exists, wherein j is a positive integer;
adding the corresponding relation between the gray scale value and the gray scale compensation value under the preset binding point display brightness value into a first corresponding relation;
and calculating the corresponding relation between the gray scale value and the gray scale compensation value under the display brightness value between the display brightness values of two adjacent preset binding points by an interpolation method, and adding the corresponding relation into the first corresponding relation.
13. The method of claim 9, wherein the R pixel, the G pixel, and the B pixel each correspond to a respective first correspondence.
14. The method of claim 8, wherein performing brightness compensation on the i-th row of pixels if the gray level difference value is greater than a preset difference threshold value comprises:
For each pixel segment, acquiring a data voltage value corresponding to a gray scale value of the pixel segment;
inquiring a second predetermined corresponding relation according to the data voltage value of the pixel section to obtain a voltage compensation value of the pixel section; the second corresponding relation is the corresponding relation between the data voltage value and the voltage compensation value;
and carrying out data voltage compensation on the pixel segment by utilizing the voltage compensation value of the pixel segment.
15. The method of claim 14, wherein the voltage compensation value is in the range of 0-12 volts and the compensated data voltage value is in the gamma voltage range.
16. The method of claim 14, wherein the data voltage compensation for the pixel segment using the voltage compensation value for the pixel segment comprises:
the data voltage compensation is performed on the nth pixel segment by using the following formula:
Output＝Seg_n_gray_data+△v
the Output is the data voltage compensated by the nth pixel segment, seg_n_gray_data is the data voltage value of the nth pixel segment in the image data to be displayed, and Δv is the voltage compensation value of the nth pixel segment.
17. The method of claim 14, wherein the R pixel, the G pixel, and the B pixel each correspond to a respective second correspondence.
18. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored therein a computer program which, when executed by a processor, implements the method steps of any of claims 6-17.
CN202311579802.8A 2023-11-23 2023-11-23 Image brightness compensation method, display device and storage medium Pending CN117594025A (en)

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