# US 2022/0036792 A1 · Method for determining gray scale values of pixels, display panel and computer readable storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0036792 A1 - Document ID: US20220036792A1 - Status: Published application - Kind: A1 - Application number: 17/190,608 - Filed: 2021-03-03 - Published: 2022-02-03 - Earliest claimed: 2020-07-28 - Assignees: Hkc Corporation Limited - Applicants: Hkc Corporation Limited - Inventors: Wei CHEN; Haijiang Yuan - Web page: https://patentgrep.com/patent/US20220036792A1 ## CPC - G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)} - G09G 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2320/0285: using tables for spatial correction of display data - G09G 2320/103: Detection of image changes, e.g. determination of an index representative of the image change - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A method for determining gray scale values of pixels is provided, which includes the following operations: determining gray scale values of pixels to be displayed of a current display picture and a picture type of the current display picture; determining a target refresh rate according to the picture type; determining a target gray scale correction value according to the target refresh rate, and determining target gray scale values according to the target gray scale correction value and the gray scale values, the target refresh rate and the target gray scale correction value are negatively correlated. A display panel and a computer readable storage medium are also provided. The present disclosure slows down the color unevenness of the display panel. ## Claims ### Claim 1 A method for determining gray scale values of pixels, comprising the following operations: determining gray scale values of pixels to be displayed of a current display picture and a picture type of the current display picture; determining a target refresh rate according to the picture type; and determining a target gray scale correction value according to the target refresh rate, and determining target gray scale values according to the target gray scale correction value and the gray scale values, the target refresh rate and the target gray scale correction value being negatively correlated. ### Claim 2 (depends on 1) The method according to claim 1, wherein the operation of determining a target gray scale correction value according to the target refresh rate comprises: determining a gray scale correction value of the pixels to be displayed, and determining a compensation parameter according to the target refresh rate; and correcting the gray scale correction value according to the compensation parameter to obtain the target gray scale correction value. ### Claim 3 (depends on 2) The method according to claim 2, wherein the operation of determining a gray scale correction value of the pixels to be displayed comprises: determining corresponding display positions of the pixels to be displayed on the display panel; and determining the gray scale correction value of the pixels to be displayed according to the display positions. ### Claim 4 (depends on 3) The method according to claim 3, wherein the operation of determining a gray scale correction value of the pixels to be displayed according to the display positions comprises: determining a lookup table about display positions and gray scale correction values; determining the gray scale correction value corresponding to the display positions in the lookup table. ### Claim 5 (depends on 1) The method according to claim 1, wherein, after the operation of determining gray scale values of pixels to be displayed of a current display picture, the method further comprises: determining display positions of the pixels to be displayed on the display panel; in responding to that the display positions are in a color uneven area of the display panel, performing the operation of determining a picture type of the current display picture; in responding to that the display positions are not in the color uneven area of the display panel, taking the gray scale values as the target gray scale values. ### Claim 6 (depends on 1) The method according to claim 1, wherein the picture type comprises a dynamic picture and a static picture, the operation of determining a target refresh rate according to the picture type comprises: obtaining a preset refresh rate; in responding to that the current display picture is a dynamic picture according to the picture type, increasing the preset refresh rate to obtain the target refresh rate; and in responding to that the current display picture is a static picture according to the picture type, decreasing the preset refresh rate to obtain the target refresh rate. ### Claim 7 (depends on 1) The method according to claim 1, wherein the operation of determining a picture type of the current display picture comprises: obtaining a previous display picture frame; determining a second pixel of the previous display picture frame corresponding to a first pixel of the current display picture, and comparing a pixel value of the first pixel with a pixel value of the second pixel; determining that the current display picture is a static picture when a number of first pixels whose pixel values are same as pixel values of corresponding second pixels is greater than a first preset number; and determining that the current display picture is a dynamic picture when a number of first pixels whose pixel values are different from pixel values of corresponding second pixels is greater than a second preset number. ### Claim 8 (depends on 1) The method according to claim 1, wherein the operation of determining a target gray scale correction value according to the target refresh rate and determining target gray scale values according to the target gray scale correction value and the gray scale values, the method further comprises: determining a display time point of a next display picture frame according to the target refresh rate after all pixels to be displayed of the current display picture are displayed on the display panel according to their corresponding target gray scale values; in responding to that the display time point arrives, taking the next display picture frame as the current display picture, and repeat to perform the operation of determining gray scale values of pixels to be displayed of the current display picture and a picture type of the current display picture. ### Claim 9 A display panel comprising a memory and at least one processor, the memory storing computer-executable instructions executable by the at least one processor, wherein when the computer-executable instructions are executed by the at least one processor, the at least one processor is caused to perform the following operations: determining gray scale values of pixels to be displayed of a current display picture and a picture type of the current display picture; determining a target refresh rate according to the picture type; and determining a target gray scale correction value according to the target refresh rate, and determining target gray scale values according to the target gray scale correction value and the gray scale values, the target refresh rate and the target gray scale correction value being negatively correlated. ### Claim 10 (depends on 9) The display panel according to claim 9, wherein the operation of determining a target gray scale correction value according to the target refresh rate comprises: determining a gray scale correction value of the pixels to be displayed, and determining a compensation parameter according to the target refresh rate; and correcting the gray scale correction value according to the compensation parameter to obtain the target gray scale correction value. ### Claim 11 (depends on 10) The display panel according to claim 10, wherein the operation of determining a gray scale correction value of the pixels to be displayed comprises: determining corresponding display positions of the pixels to be displayed on the display panel; and determining the gray scale correction value of the pixels to be displayed according to the display positions. ### Claim 12 (depends on 11) The display panel according to claim 11, wherein the operation of determining a gray scale correction value of the pixels to be displayed according to the display position comprises: determining a lookup table about display positions and gray scale correction values; determining the gray scale correction value corresponding to the display positions in the lookup table. ### Claim 13 (depends on 9) The display panel according to claim 9, wherein, after the operation of determining gray scale values of pixels to be displayed of the current display picture, when the computer-executable instructions are executed by the at least one processor, the at least one processor are further caused to perform the following operations: determining display positions of the pixels to be displayed on the display panel; in responding to that the display positions are in a color uneven area of the display panel, performing the operation of determining a picture type of the current display picture; in responding to that the display positions are not in the color uneven area of the display panel, taking the gray scale values as the target gray scale values. ### Claim 14 (depends on 9) The display panel according to claim 9, wherein the picture type comprises a dynamic picture and a static picture, the operation of determining a target refresh rate according to the picture type comprises: obtaining a preset refresh rate; in responding to that the current display picture is a dynamic picture according to the picture type, increasing the preset refresh rate to obtain the target refresh rate; and in responding to that the current display picture is a static picture according to the picture type, decreasing the preset refresh rate to obtain the target refresh rate. ### Claim 15 A computer-readable storage medium storing computer-executable instructions executable by at least one processor, wherein when the computer-executable instructions are executed by the at least one processor, the at least one processor is further caused to perform the following operations: determining gray scale values of pixels to be displayed of a current display picture and a picture type of the current display picture; determining a target refresh rate according to the picture type; and determining a target gray scale correction value according to the target refresh rate, and determining target gray scale values according to the target gray scale correction value and the gray scale values, the target refresh rate and the target gray scale correction value being negatively correlated. ### Claim 16 (depends on 15) The computer-readable storage medium according to claim 15, wherein the operation of determining a target gray scale correction value according to the target refresh rate comprises: determining a gray scale correction value of the pixels to be displayed, and determining a compensation parameter according to the target refresh rate; and correcting the gray scale correction value according to the compensation parameter to obtain the target gray scale correction value. ### Claim 17 (depends on 16) The computer-readable storage medium according to claim 16, wherein the operation of determining a gray scale correction value of the pixels to be displayed comprises: determining corresponding display positions of the pixels to be displayed on the display panel; and determining the gray scale correction value of the pixels to be displayed according to the display positions. ### Claim 18 (depends on 17) The computer-readable storage medium according to claim 17, wherein the operation of determining a gray scale correction value of the pixels to be displayed according to the display position comprises: determining a lookup table about display positions and gray scale correction values; determining the gray scale correction value corresponding to the display positions in the lookup table. ### Claim 19 (depends on 15) The computer-readable storage medium according to claim 15, wherein, after the operation of determining gray scale values of pixels to be displayed of the current display picture, when the computer-executable instructions are executed by the at least one processor, the at least one processor is further caused to perform the following operations: determining display positions of the pixels to be displayed on the display panel; in responding to that the display positions are in a color uneven area of the display panel, performing the operation of determining a picture type of the current display picture; in responding to that the display positions are not in the color uneven area of the display panel, taking the gray scale values as the target gray scale values. ### Claim 20 (depends on 15) The computer-readable storage medium according to claim 15, wherein the picture type comprises a dynamic picture and a static picture, the operation of determining a target refresh rate according to the picture type comprises: obtaining a preset refresh rate; in responding to that the current display picture is a dynamic picture according to the picture type, increasing the preset refresh rate to obtain the target refresh rate; and in responding to that the current display picture is a static picture according to the picture type, decreasing the preset refresh rate to obtain the target refresh rate.