CN115798381B - Pixel compensation method, pixel compensation device, display panel and storage medium - Google Patents
Pixel compensation method, pixel compensation device, display panel and storage medium Download PDFInfo
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Abstract
The application provides a pixel compensation method, a pixel compensation device, a display panel and a storage medium, wherein the pixel compensation method comprises the following steps: presetting a plurality of first gray-scale pictures; acquiring a second gray-scale picture displayed by a display panel; judging whether the absolute value of the difference value between the gray scale value of the first gray scale picture and the average gray scale value of the second gray scale picture is smaller than a preset threshold value; dividing the second gray-scale picture to obtain a plurality of detection areas when the absolute value of the difference value between the gray-scale value of the first gray-scale picture and the average gray-scale value of the second gray-scale picture is smaller than the preset threshold value; calculating to obtain compensation data according to the gray scale value of each detection area and the gray scale value of the first gray scale picture; and compensating the pixel unit according to the compensation data. The first gray-scale picture and the acquired second gray-scale picture are directly compared for two times, so that the Demura time of the display panel can be effectively shortened.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a pixel compensation method, a pixel compensation device, a display panel, and a storage medium.
Background
Display technology has long been one of the important research directions in electronic devices. Along with technology updating iteration of the display screen, the requirements of people on the display effect of the display screen are higher and higher, and the tolerance of the phenomenon of uneven display (Mura) on the display screen is lower.
The display screen is subjected to Demura processing before leaving the factory to improve the Mura phenomenon of the display screen. Currently, demura of a display screen can only process a display screen of the currently acquired display screen, and the processing time is long, so that the production efficiency is low.
Disclosure of Invention
The application discloses a pixel compensation method which can solve the technical problem of long Demura processing time.
In a first aspect, the present application provides a pixel compensation method, including:
presetting a plurality of first gray-scale pictures;
acquiring a second gray-scale picture displayed by a display panel;
judging whether the absolute value of the difference value between the gray scale value of the first gray scale picture and the average gray scale value of the second gray scale picture is smaller than a preset threshold value;
dividing the second gray-scale picture to obtain a plurality of detection areas when the absolute value of the difference value between the gray-scale value of the first gray-scale picture and the average gray-scale value of the second gray-scale picture is smaller than the preset threshold value;
calculating to obtain compensation data according to the gray scale value of each detection area and the gray scale value of the first gray scale picture;
and compensating the pixel unit according to the compensation data.
The preset first gray-scale picture and the acquired second gray-scale picture are directly compared for two times, so that the Demura time of the display panel can be effectively shortened, and the production efficiency is improved. Meanwhile, a plurality of first gray-scale pictures are preset, the compensation data are calculated according to the gray-scale values of the detection areas and the gray-scale values of the first gray-scale pictures, and the display uniformity problem of the display panel is improved.
Optionally, the pixel compensation method further includes:
when the absolute value of the difference value between the gray scale value of the first gray scale picture and the average gray scale value of the second gray scale picture is larger than the preset threshold value, compensating the second gray scale picture according to the average gray scale value of the second gray scale picture and the gray scale value of the first gray scale picture, and obtaining a third gray scale picture;
dividing the third gray-scale picture to obtain a plurality of detection areas;
calculating to obtain compensation data according to the gray scale value of each detection area and the gray scale value of the first gray scale picture;
and compensating the pixel unit according to the compensation data.
Optionally, the dividing the second gray-scale image to obtain a plurality of detection areas specifically includes:
dividing areas with preset size specifications, dividing the second gray-scale picture according to the dividing areas to obtain a plurality of connected detection areas, wherein the size specifications of each detection area are the same;
the calculating to obtain compensation data according to the gray scale value of each detection area and the gray scale value of the first gray scale picture specifically includes:
and comparing the gray scale values of all the points in each detection area with the gray scale values of the first gray scale picture corresponding to the surrounding points, and calculating to obtain compensation data.
Optionally, the pixel compensation method further includes:
and determining the coordinates of the detection area to be compensated according to the grid line where the identification point in the dividing area is located.
Optionally, the dividing the second gray-scale image to obtain a plurality of detection areas specifically includes:
performing Fourier transform according to the second gray-scale picture to obtain a plurality of detection areas;
the calculating to obtain compensation data according to the gray scale value of each detection area and the gray scale value of the first gray scale picture specifically includes:
performing Fourier transform according to the second gray-scale picture to obtain data to be detected of each detection area;
and obtaining compensation data through interpolation weighted operation according to the data to be detected and the gray scale value of the first gray scale picture.
In a second aspect, the present application also provides a pixel compensation apparatus applied to a display panel, the pixel compensation apparatus comprising:
the control module is used for presetting a plurality of first gray-scale pictures; a kind of electronic device with high-pressure air-conditioning system
The acquisition module is used for acquiring a second gray-scale picture displayed by the display panel;
the control module is used for judging whether the absolute value of the difference value between the gray scale value of the first gray scale picture and the average gray scale value of the second gray scale picture is smaller than a preset threshold value;
when the absolute value of the difference value between the gray scale value of the first gray scale picture and the average gray scale value of the second gray scale picture is smaller than the preset threshold value, the control module is further used for dividing the second gray scale picture to obtain a plurality of detection areas;
the control module is also used for calculating compensation data according to the gray scale value of each detection area and the gray scale value of the first gray scale picture;
the storage modules are used for storing the plurality of first gray-scale pictures and the compensation data in the display panel;
the control module is also used for compensating the pixel units of the display panel according to the compensation data.
Optionally, when the absolute value of the difference between the gray-scale value of the first gray-scale picture and the average gray-scale value of the second gray-scale picture is greater than the preset threshold, the control module is configured to compensate the second gray-scale picture according to the average gray-scale value of the second gray-scale picture and the gray-scale value of the first gray-scale picture, so as to obtain a third gray-scale picture;
the control module is used for dividing the third gray-scale picture to obtain a plurality of detection areas;
the control module is used for calculating compensation data according to the gray scale value of each detection area and the gray scale value of the first gray scale picture;
the control module is used for compensating the pixel unit according to the compensation data.
Optionally, the control module presets a size specification dividing area, and divides the second gray-scale picture according to the dividing area to obtain a plurality of connected detection areas, wherein the size specification of each detection area is the same;
and the control module compares the gray scale values of all the points in each detection area with the gray scale values of the first gray scale picture corresponding to the surrounding points, and calculates to obtain compensation data.
In a third aspect, the present application further provides a display panel, where the display panel includes a storage module, a pixel unit, a timing controller, and a data driving circuit, where the storage module stores the compensation data calculated by the pixel compensation device in the second aspect, and the timing controller controls the data driving circuit to drive the pixel unit to work according to the compensation data.
In a fourth aspect, the present application also provides a storage medium storing a computer readable program which, when read and executed by a processor, performs the pixel compensation method according to the first aspect.
Drawings
For a clearer description of the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a pixel compensation method according to an embodiment of the application.
Fig. 2 is a schematic diagram of a pixel compensation apparatus according to an embodiment of the application.
Fig. 3 is a schematic diagram of dividing a second gray-scale frame according to an embodiment of the application.
Reference numerals illustrate: the pixel compensation device-1, the control module-11, the acquisition module-12, the display panel-2, the storage module-21, the pixel unit-22, the time schedule controller-23, the data driving circuit-24, the dividing area/detection area-25, the identification point-251 and the grid line-26.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to fall within the scope of the present application.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic flow chart of a pixel compensation method according to an embodiment of the application; fig. 2 is a schematic diagram of a pixel compensation apparatus according to an embodiment of the application. The pixel compensation method comprises the following steps: steps S101, S102, S103, S104, S105, S106, wherein steps S101, S102, S103, S104, S105, S106 are described in detail below.
S101, presetting a plurality of first gray-scale pictures;
s102, acquiring a second gray-scale picture displayed by the display panel 2;
s103, judging whether the absolute value of the difference value between the gray scale value of the first gray scale picture and the average gray scale value of the second gray scale picture is smaller than a preset threshold value;
when the absolute value of the difference between the gray-scale value of the first gray-scale picture and the average gray-scale value of the second gray-scale picture is smaller than the preset threshold, S104, dividing the second gray-scale picture to obtain a plurality of detection areas 25 (see fig. 3);
s105, calculating compensation data according to the gray scale value of each detection area 25 and the gray scale value of the first gray scale picture;
and S106, compensating the pixel unit 22 according to the compensation data.
As shown in fig. 2, the present application further provides a pixel compensation apparatus 1, which is applied to the display panel 2. The pixel compensation device 1 comprises a control module 11 and an acquisition module 12; the control module 11 is used for presetting a plurality of first gray-scale pictures; the acquiring module 12 is configured to acquire a second gray-scale image displayed on the display panel 2; the control module 11 is configured to determine whether an absolute value of a difference between a gray-scale value of the first gray-scale picture and an average gray-scale value of the second gray-scale picture is smaller than a preset threshold; when the absolute value of the difference between the gray-scale value of the first gray-scale picture and the average gray-scale value of the second gray-scale picture is smaller than the preset threshold, the control module 11 is further configured to divide the second gray-scale picture to obtain a plurality of detection areas 25; the control module 11 is further configured to calculate compensation data according to the gray-scale value of each detection area 25 and the gray-scale value of the first gray-scale picture; the display panel 2 includes a storage module 21 and a pixel unit 22; the storage module 21 is configured to store a preset plurality of first gray-scale frames and the compensation data; the control module 11 is further configured to compensate the pixel unit 22 according to the compensation data.
It should be noted that, the display panel 2 may be an OLED display screen, an LCD display screen, or the like, which is not limited in the present application. In general, when the display panel 2 is an OLED display, the thin film transistors used are low temperature polysilicon thin film transistors and oxide thin film transistors. Due to the limitation of the crystallization process of the low-temperature polysilicon thin film transistor, the low-temperature polysilicon thin film transistor manufactured on the large-area glass substrate has non-uniformity on electrical parameters such as threshold voltage, mobility and the like, so that the current and brightness difference of the display panel 2 at different positions, namely Mura phenomenon, is caused; similarly, the threshold voltage of the oxide thin film transistor is unstable after a long-time voltage is applied at high temperature, which also causes the Mura phenomenon. Therefore, the display panel 2 needs to be subjected to Demura processing. The control module 11 may be a chip circuit, the acquisition module 12 may be a charge coupled device (Charge Coupled Device, CCD), and the storage module 21 may be a Flash memory (Flash).
The present application further provides a display panel 2, please refer to fig. 2 again, the display panel 2 includes a storage module 21, a pixel unit 22, a timing controller 23 and a data driving circuit 24, the storage module 21 stores the compensation data calculated by the pixel compensation device 1, and the timing controller 23 controls the data driving circuit 24 to drive the pixel unit 22 to work according to the compensation data.
Specifically, the gray scale value ranges from 0 to 255 gray scales, the display panel 2 is usually lightened to display RGB images with 64, 96, 160, 192 or 224 gray scales for detection, and different display screens may use RGB images with different gray scale values for detection. It will be appreciated that storing the first gray-scale image in the storage module 21 specifically means converting the gray-scale data of the first gray-scale image into a fixed reference value, and the storage module 21 stores the fixed reference value, so that it is not necessary to occupy too much storage space of the storage module 21. By analyzing the obtained gray-scale picture of the display panel 2, a Mura region in which a Mura phenomenon occurs is detected, and compensation data is calculated and stored in the storage module 21. When the display panel 2 is turned on again, the timing controller 23 in the display panel 2 outputs compensation data to the data driving circuit 24 according to the stored compensation data to compensate the pixels in the display panel 2, and detects the Mura phenomenon in the display panel 2 again to confirm whether the compensation is completed.
In the related art, when calculating the compensation data of the Mura region, the gray-scale image in the Mura region can be compared with the gray-scale values of the surrounding points only. For example, the obtained gray-scale frame of the display panel 2 is an RGB image with 127 gray scales, but when comparing the data of the Mura area, all the points are compared with the gray scales of all the surrounding points. For example, when the Mura area is a block of 8×8, the obtained gray-scale image of the display panel 2 is that every 8 pixels are used as a point location, and the obtained gray-scale image is compared with the 8 pixel points on the upper, lower, left and right sides of the periphery of the gray-scale image, and when the gray-scale value of a certain point location is detected to be inconsistent with other gray-scale values, the point location is determined to be the Mura point location. However, if the detected Mura point is 67 gray levels except 127 gray levels, the Mura point is compensated to 67 gray levels, which results in that the display frame of the display panel 2 is erroneous and cannot be identified, in other words, when the display frame of the display panel 2 is erroneous, the determining method cannot accurately identify the Mura point for compensation.
In this embodiment, a plurality of first gray-scale frames are preset and can be adapted to the demux processing of different display screens, for example, the first gray-scale frames may be any one of the gray-scale frames commonly used in the demux processing, such as 67, 127, 255, etc. It can be understood that when the absolute value of the difference between the gray-scale value of the first gray-scale picture and the average gray-scale value of the second gray-scale picture is smaller than the preset threshold, it is indicated that the gray-scale picture displayed by the second gray-scale picture is the correct gray-scale picture. On the one hand, the obtained second gray-scale picture of the display panel 2 is directly compared with the preset first gray-scale picture, so that whether the second gray-scale picture is displayed as a correct gray-scale picture or not can be rapidly judged, and the difference of the whole gray scales of the second gray-scale picture can be judged; on the other hand, calculating the compensation data based on the gray-scale value of each of the detection areas 25 and the gray-scale value of the first gray-scale screen improves the problem of the display uniformity of the display panel 2.
It can be appreciated that in this embodiment, by directly comparing the preset first gray-scale frame with the acquired second gray-scale frame twice, the Demura time of the display panel 2 can be effectively shortened, thereby improving the production efficiency. Meanwhile, a plurality of first gray-scale frames are preset, and the compensation data are calculated according to the gray-scale values of the detection areas 25 and the gray-scale values of the first gray-scale frames, so that the problem of uniformity of display of the display panel 2 is solved.
In one possible implementation, referring again to fig. 1, the pixel compensation method further includes: steps S107, S108, S109, S110, wherein the steps S107, S108, S109, S110 are described in detail below.
When the absolute value of the difference value between the gray-scale value of the first gray-scale picture and the average gray-scale value of the second gray-scale picture is larger than the preset threshold, S107, compensating the second gray-scale picture according to the average gray-scale value of the second gray-scale picture and the gray-scale value of the first gray-scale picture to obtain a third gray-scale picture;
s108, dividing the third gray-scale picture to obtain a plurality of detection areas 25;
s109, calculating compensation data according to the gray scale value of each detection area 25 and the gray scale value of the first gray scale picture;
and S110, compensating the pixel unit 22 according to the compensation data.
Specifically, when the absolute value of the difference between the gray-scale value of the first gray-scale picture and the average gray-scale value of the second gray-scale picture is greater than the preset threshold, it is indicated that the display error may occur in the second gray-scale picture displayed by the display panel 2. At this time, the control module 11 calculates compensation data according to the average gray level value of the second gray level frame and the gray level value of the first gray level frame, and the timing controller 23 in the display panel 2 transmits the compensation data to the data driving circuit 24 to compensate the pixel unit 22, so that the display panel 2 displays the third gray level frame. The control module 11 divides the detection areas 25 according to the third gray-scale image, and calculates the compensation data according to the gray-scale values of the detection areas 25 and the gray-scale values of the first gray-scale image.
It can be appreciated that in this embodiment, by comparing the acquired second gray-scale frame of the display panel 2 with the preset first gray-scale frame, whether the second gray-scale frame displays a correct gray-scale frame or not can be rapidly determined, and the difference of the overall gray-scale of the second gray-scale frame is determined, so that the compensation data is correctly calculated, the pixel unit 22 is compensated, and the situation that the display panel 2 displays an error due to the error compensation of the compensation data is avoided.
It should be noted that, for the third grayscale image to divide the detection area 25, please refer to the following embodiment of the present application for dividing the detection area 25 for the second grayscale image, which is not described herein.
In one possible embodiment, please refer to fig. 3, fig. 3 is a schematic diagram illustrating the division of the second gray-scale image according to an embodiment of the present application. The dividing the second gray-scale image to obtain a plurality of detection areas 25 specifically includes:
dividing regions with preset size specifications, dividing the second gray-scale picture according to the dividing regions to obtain a plurality of connected detection regions 25, wherein the size specifications of each detection region 25 are the same;
the calculating to obtain the compensation data according to the gray-scale value of each detection area 25 and the gray-scale value of the first gray-scale picture specifically includes:
and comparing the gray scale values of all the points in each detection area 25 with the gray scale values of the first gray scale picture corresponding to the surrounding points, and calculating to obtain compensation data.
Specifically, the difference between the present embodiment and the related art is that, in the related art, when calculating the compensation data of the Mura area, the compensation data can be compared only according to the gray-scale values of the gray-scale picture in the Mura area and the points around the gray-scale picture; in this embodiment, the control module 11 compares the gray-scale values of the first gray-scale image corresponding to the surrounding points of each of the detection areas 25 according to the gray-scale values of all the points, so as to improve the uniformity of the display panel 2.
In one possible implementation, referring again to fig. 3, the pixel compensation method further includes:
the coordinates of the detection area 25 to be compensated are determined according to the gate line 26 where the identification point 251 in the divided area is located.
Specifically, the gate line 26 is configured to transmit a scan signal to control on/off of a thin film transistor electrically connected to the gate line, so as to control the operation of the corresponding pixel unit 22 respectively. In this embodiment, the dividing region further includes at least one identification point 251, and the identification point 251 is used to determine coordinates of the detection region 25 after division. It will be appreciated that the location of the identification point 251 in the divided area or the corresponding detection area 25 is known, and the coordinate position of the corresponding detection area 25 can be determined by determining the gate line 26 in which the identification point 251 is located, so that the control module 11 can compensate the pixel unit 22 in the corresponding detection area 25 according to the compensation data.
It should be noted that, in the related art, all data after Demura processing, including the Mura region coordinates and the compensation data, are generally stored in the memory module 21, which occupies a large amount of memory space of the memory module 21, and requires a relatively high requirement for the memory module 21, resulting in an increase in manufacturing cost of the display panel 2.
It will be appreciated that in the present embodiment, the coordinates of the detection area 25 are stored in the control module 11, and the flash memory module is only used to store the compensation data, so that the storage space required by the storage module 21 is reduced, thereby reducing the manufacturing cost of the display panel 2.
In one possible implementation manner, the dividing the second gray-scale image to obtain a plurality of detection areas 25 specifically includes:
performing fourier transform according to the second gray-scale image to obtain a plurality of detection areas 25;
the calculating to obtain the compensation data according to the gray-scale value of each detection area 25 and the gray-scale value of the first gray-scale picture specifically includes:
performing fourier transform according to the second gray-scale image to obtain data to be detected of each detection area 25;
and obtaining compensation data through interpolation weighted operation according to the data to be detected and the gray scale value of the first gray scale picture.
Specifically, the control module 11 performs fourier transform on the second gray-scale image, and extracts the transformed high-frequency data, so as to precisely divide the detection areas 25, i.e. Mura areas. In this embodiment, before the control module 11 performs the weighted operation by interpolation to obtain the compensation data according to the to-be-detected data and the gray scale value of the first gray scale frame, the control module 11 may further determine whether the second gray scale frame is a correct gray scale frame by extracting non-high frequency data after fourier transforming the second gray scale frame and comparing the non-high frequency data with the gray scale value of the first gray scale frame. The control module 11 obtains compensation data through interpolation weighted operation according to the data to be measured and the gray scale value of the first gray scale picture, and can also improve the problem of the display uniformity of the display panel 2, wherein the data to be measured is high frequency data extracted after the control module 11 performs fourier transform on the second gray scale picture.
In one possible implementation manner, when the absolute value of the difference between the gray-scale value of the first gray-scale picture and the average gray-scale value of the second gray-scale picture is greater than the preset threshold, the control module 11 is configured to compensate the second gray-scale picture according to the average gray-scale value of the second gray-scale picture and the gray-scale value of the first gray-scale picture, so as to obtain a third gray-scale picture; the control module 11 is configured to divide the third gray-scale frame to obtain a plurality of detection areas 25; the control module 11 is configured to calculate compensation data according to the gray-scale values of the detection areas 25 and the gray-scale values of the first gray-scale picture; the control module 11 is configured to compensate the pixel unit 22 according to the compensation data.
It can be appreciated that in this embodiment, by comparing the acquired second gray-scale frame of the display panel 2 with the preset first gray-scale frame, whether the second gray-scale frame displays a correct gray-scale frame or not can be rapidly determined, and the difference of the overall gray-scale of the second gray-scale frame is determined, so that the compensation data is correctly calculated, the pixel unit 22 is compensated, and the situation that the display panel 2 displays an error due to the error compensation of the compensation data is avoided.
In a possible implementation manner, referring to fig. 3 again, the control module 11 presets a size specification and divides the second gray-scale frame according to the division regions to obtain a plurality of connected detection regions 25, where the size specification of each detection region 25 is the same; the control module 11 compares the gray-scale values of all the points in each detection area 25 with the gray-scale values of the first gray-scale image corresponding to the surrounding points, and calculates to obtain compensation data.
It can be appreciated that in the present embodiment, the control module 11 compares the gray-scale values of the first gray-scale image corresponding to the surrounding points of each detection area 25 according to the gray-scale values of all the points in each detection area, so as to improve the display uniformity of the display panel 2.
In a possible embodiment, referring to fig. 3 again, the display panel 2 further includes a plurality of gate lines 26, and the control module 11 determines the coordinates of the detection area 25 to be compensated according to the gate lines 26 where the identification points 251 in the dividing area are located, and stores the coordinates of the detection area 25 in the control module 11.
It can be appreciated that in the present embodiment, the coordinates of the detection area 25 to be compensated are determined according to the gate lines 26 where the identification points 251 in the dividing area are located, so that it is avoided that all the coordinates of the detection area 25 need to be stored in the storage module 21, and the storage space required by the storage module 21 is reduced, thereby reducing the manufacturing cost of the display panel 2.
In a possible implementation manner, the control module 11 performs fourier transform according to the second gray-scale image to obtain a plurality of detection areas 25; the control module 11 performs fourier transform according to the second gray-scale image to obtain data to be detected of each detection area 25; the control module 11 obtains compensation data through interpolation weighting operation according to the data to be detected and the gray scale value of the first gray scale picture.
It can be appreciated that in the present embodiment, the control module 11 obtains the compensation data by interpolation weighting according to the to-be-detected data and the gray scale value of the first gray scale frame, so as to improve the problem of the display uniformity of the display panel 2.
The present application also provides a storage medium storing a computer readable program which, when read and executed by a processor, performs a pixel compensation method as described above.
It should be noted that, it will be understood by those skilled in the art that all or part of the steps in the methods of the foregoing embodiments may be implemented by a program, which may be stored in a storage medium, and the storage medium may include: flash disk, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
The principles and embodiments of the present application have been described herein with reference to specific examples, the description of the above embodiments being only for the purpose of aiding in the understanding of the core concept of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (10)
1. A pixel compensation method, the pixel compensation method comprising:
presetting a plurality of first gray-scale pictures;
acquiring a second gray-scale picture displayed by a display panel;
judging whether the absolute value of the difference value between the gray scale value of the first gray scale picture and the average gray scale value of the second gray scale picture is smaller than a preset threshold value;
dividing the second gray-scale picture to obtain a plurality of detection areas when the absolute value of the difference value between the gray-scale value of the first gray-scale picture and the average gray-scale value of the second gray-scale picture is smaller than the preset threshold value;
calculating to obtain compensation data according to the gray scale value of each detection area and the gray scale value of the first gray scale picture;
and compensating the pixel unit according to the compensation data.
2. The pixel compensation method of claim 1, wherein the pixel compensation method further comprises:
when the absolute value of the difference value between the gray scale value of the first gray scale picture and the average gray scale value of the second gray scale picture is larger than the preset threshold value, compensating the second gray scale picture according to the average gray scale value of the second gray scale picture and the gray scale value of the first gray scale picture, and obtaining a third gray scale picture;
dividing the third gray-scale picture to obtain a plurality of detection areas;
calculating compensation data according to the gray scale value of each detection area obtained by dividing the third gray scale picture and the gray scale value of the first gray scale picture;
and compensating the pixel unit according to the compensation data obtained by dividing the gray scale value of each detection area obtained by dividing the third gray scale picture and the gray scale value of the first gray scale picture.
3. The method for pixel compensation according to claim 1, wherein said dividing said second gray-scale frame to obtain a plurality of detection areas comprises:
dividing areas with preset size specifications, dividing the second gray-scale picture according to the dividing areas to obtain a plurality of connected detection areas, wherein the size specifications of each detection area are the same;
the calculating to obtain compensation data according to the gray scale value of each detection area and the gray scale value of the first gray scale picture specifically includes:
and comparing the gray scale values of all the points in each detection area with the gray scale values of the first gray scale picture corresponding to the surrounding points, and calculating to obtain compensation data.
4. A pixel compensation method according to claim 3, wherein the pixel compensation method further comprises:
and determining the coordinates of the detection area to be compensated according to the grid line where the identification point in the dividing area is located.
5. The method for pixel compensation according to claim 1, wherein said dividing said second gray-scale frame to obtain a plurality of detection areas comprises:
performing Fourier transform according to the second gray-scale picture to obtain a plurality of detection areas;
the calculating to obtain compensation data according to the gray scale value of each detection area and the gray scale value of the first gray scale picture specifically includes:
performing Fourier transform according to the second gray-scale picture to obtain data to be detected of each detection area;
and obtaining compensation data through interpolation weighted operation according to the data to be detected and the gray scale value of the first gray scale picture.
6. A pixel compensation apparatus for use in a display panel, the pixel compensation apparatus comprising:
the control module is used for presetting a plurality of first gray-scale pictures; a kind of electronic device with high-pressure air-conditioning system
The acquisition module is used for acquiring a second gray-scale picture displayed by the display panel;
the control module is used for judging whether the absolute value of the difference value between the gray scale value of the first gray scale picture and the average gray scale value of the second gray scale picture is smaller than a preset threshold value;
when the absolute value of the difference value between the gray scale value of the first gray scale picture and the average gray scale value of the second gray scale picture is smaller than the preset threshold value, the control module is further used for dividing the second gray scale picture to obtain a plurality of detection areas;
the control module is also used for calculating compensation data according to the gray scale value of each detection area and the gray scale value of the first gray scale picture;
the storage modules are used for storing the plurality of first gray-scale pictures and the compensation data in the display panel;
the control module is also used for compensating the pixel units of the display panel according to the compensation data.
7. The pixel compensation apparatus of claim 6, wherein when an absolute value of a difference between the gray-scale value of the first gray-scale frame and the average gray-scale value of the second gray-scale frame is greater than the preset threshold, the control module is configured to compensate the second gray-scale frame according to the average gray-scale value of the second gray-scale frame and the gray-scale value of the first gray-scale frame, so as to obtain a third gray-scale frame;
the control module is used for dividing the third gray-scale picture to obtain a plurality of detection areas;
the control module is used for calculating compensation data according to the gray scale value of each detection area obtained by dividing the third gray scale picture and the gray scale value of the first gray scale picture;
the control module is used for compensating the pixel unit according to the compensation data obtained by dividing the gray scale value of each detection area obtained by dividing the third gray scale picture and the gray scale value of the first gray scale picture.
8. The pixel compensation apparatus of claim 6, wherein the control module presets a size specification dividing area, and divides the second gray-scale frame according to the dividing area to obtain a plurality of connected detection areas, wherein the size specification of each detection area is the same;
and the control module compares the gray scale values of all the points in each detection area with the gray scale values of the first gray scale picture corresponding to the surrounding points, and calculates to obtain compensation data.
9. A display panel, which is characterized in that the display panel comprises a storage module, a pixel unit, a time sequence controller and a data driving circuit, wherein the storage module stores the compensation data calculated by the pixel compensation device according to any one of claims 6-8, and the time sequence controller controls the data driving circuit to drive the pixel unit to work according to the compensation data.
10. A storage medium storing a computer readable program which, when read and executed by a processor, performs the pixel compensation method according to any one of claims 1-5.
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| CN104505043A (en) * | 2014-12-29 | 2015-04-08 | 厦门天马微电子有限公司 | Method and device for gray scale compensation of image data |
| CN113077748A (en) * | 2021-03-31 | 2021-07-06 | Tcl华星光电技术有限公司 | Gray scale compensation method, gray scale compensation device and gray scale compensation system of display panel |
| CN113920917A (en) * | 2021-10-20 | 2022-01-11 | 昆山国显光电有限公司 | Display panel compensation method and compensation device |
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| CN108510956B (en) * | 2018-05-02 | 2020-01-07 | 京东方科技集团股份有限公司 | Image display brightness adjusting method and device of display panel and display device |
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| CN113077748A (en) * | 2021-03-31 | 2021-07-06 | Tcl华星光电技术有限公司 | Gray scale compensation method, gray scale compensation device and gray scale compensation system of display panel |
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