# US 12,223,875 B2 · Method and apparatus for compensating for brightness of display panel, display device, and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,223,875 B2 - Document ID: US12223875B2 - Status: Granted - Kind: B2 - Application number: 18/028,358 - Filed: 2022-04-28 - Published: 2024-09-19 - Granted: 2025-02-11 - Earliest claimed: 2022-04-28 - Assignees: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Chengdu BOE Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd. - Inventors: Zewen Li; Hengzhen Liang; Lianbin Liu; Wenxiao Niu; Can Xiao; Yingjun Deng - Web page: https://patentgrep.com/patent/US12223875B2 ## CPC - G09G 3/2007: {Display of intermediate tones} - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 3/34: by control of light from an independent source - G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED] - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - 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 The present application discloses a method and an apparatus for compensating for brightness of a display panel, a display device, and a storage medium, and belongs to the field of display technologies. The method comprises: acquiring a brightness value of the display panel; acquiring, based on the brightness value of the display panel, a compensation function corresponding to the brightness value, and compensation parameters of the compensation function; and compensating for the brightness of the display panel by using the compensation function corresponding to the brightness value, the a degree at which the brightness of the image to be displayed by the display panel is compensated is negatively correlated with the brightness value of the display panel. ## Claims ### Claim 1 A method for compensating for brightness of a display panel, comprising: acquiring a brightness value of the display panel; acquiring, based on the brightness value of the display panel, a compensation function corresponding to the brightness value, and compensation parameters of the compensation function; and compensating for brightness of an image to be displayed by the display panel by using the compensation function corresponding to the brightness value; wherein a degree at which the brightness of the image to be displayed by the display panel is compensated is negatively correlated with the brightness value of the display panel, wherein acquiring, based on the brightness value of the display panel, the compensation function corresponding to the brightness value, and the compensation parameters of the compensation function comprises: acquiring the compensation function corresponding to the brightness value, based on the brightness value of the display panel and a first corresponding relationship between brightness values of the display panel and compensation functions; and acquiring the compensation parameters of the compensation function corresponding to the brightness value, based on the brightness value of the display panel and a second corresponding relationship between the brightness values of the display panel and groups of compensation parameters, wherein compensating for the brightness of the image to be displayed by the display panel by using the compensation function corresponding to the brightness value comprises: compensating for the brightness of the image to be displayed by the display panel by using a first compensation function, after the brightness value of the display panel is determined to be within a first brightness range based on the brightness value of the display panel; and compensating for the brightness of the image to be displayed by the display panel by using a second compensation function, after the brightness value of the display panel is determined to be within a second brightness range based on the brightness value of the display panel, wherein the first corresponding relationship comprises: a corresponding relationship between the first brightness range and the first compensation function, and a corresponding relationship between the second brightness range and the second compensation function; and a lower limit value of the first brightness range is greater than an upper limit value of the second brightness range, and a degree at which the brightness of the image to be displayed by the display panel is compensated by using the first compensation function is smaller than a degree at which the brightness of the image to be displayed by the display panel is compensated by using the second compensation function. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first compensation function is: Y = Gain * X * G ′ + Offset * O ′ ; wherein Y is a grayscale of the image after the brightness of the image is compensated; X is a grayscale of the image before the brightness of the image is compensated; each of Gain, Offset, G′ and O′ is one of compensation parameters of the first compensation function. ### Claim 3 (depends on 1) The method according to claim 1, wherein the second compensation function is: Y = Beta * X ⁢ 2 * B ′ + Gain * X * G ′ + Offset * O ′ ; wherein Y is a grayscale of the image after the brightness of the image is compensated; X is a grayscale of the image before the brightness of the image is compensated; each of Beta, Gain, Offset, B′, G′ and O′ is one of compensation parameters of the second compensation function. ### Claim 4 (depends on 1) The method according to claim 1, wherein compensating for the brightness of the image to be displayed by the display panel by using the compensation function corresponding to the brightness value further comprises: compensating for the brightness of the image to be displayed by the display panel by using a third compensation function, after the brightness value of the display panel is determined to be within a third brightness range based on the brightness value of the display panel; wherein the first corresponding relationship further comprises: a corresponding relationship between the third brightness range and the third compensation function, and an upper limit value of the third brightness range is smaller than an upper limit value of the first brightness range, and greater than the upper limit value of the second brightness range. ### Claim 5 (depends on 4) The method according to claim 4, wherein the third compensation function is: Y = Beta * X 2 + Gain * X + Offset * O ′ ; wherein Y is a grayscale of the image after the brightness of the image is compensated; X is a grayscale of the image before the brightness of the image is compensated; each of Beta, Gain, Offset and O′ is one of compensation parameters of the third compensation function. ### Claim 6 (depends on 1) The method according to claim 1, wherein before acquiring the brightness value of the display panel, the method further comprises: acquiring a first corresponding relationship between brightness values of the display panel and compensation functions, and a second corresponding relationship between the brightness values of the display panel and groups of compensation parameters. ### Claim 7 An apparatus for compensating for brightness of a display panel, comprising: a first acquisition module configured to acquire a brightness value of the display panel; a second acquisition module configured to acquire, based on the brightness value of the display panel, a compensation function corresponding to the brightness value, and compensation parameters of the compensation function; and a brightness compensation module configured to compensate for brightness of an image to be displayed by the display panel by using the compensation function corresponding to the brightness value; wherein a degree at which the brightness of the image to be displayed by the display panel is compensated is negatively correlated with the brightness value of the display panel, wherein the second acquisition module is configured to: acquire the compensation function corresponding to the brightness value, based on the brightness value of the display panel and a first corresponding relationship between brightness values of the display panel and compensation functions; and acquire the compensation parameters of the compensation function corresponding to the brightness value, based on the brightness value of the display panel and a second corresponding relationship between the brightness values of the display panel and groups of compensation parameters, wherein the brightness compensation module comprises: a first compensation unit configured to compensate for the brightness of the image to be displayed by the display panel by using a first compensation function, after the brightness value of the display panel is determined to be within a first brightness range based on the brightness value of the display panel; and a second compensation unit configured to compensate for the brightness of the image to be displayed by the display panel by using a second compensation function, after the brightness value of the display panel is determined to be within a second brightness range based on the brightness value of the display panel, wherein the first corresponding relationship comprises: a corresponding relationship between the first brightness range and the first compensation function, and a corresponding relationship between the second brightness range and the second compensation function; and a lower limit value of the first brightness range is greater than an upper limit value of the second brightness range, and a degree at which the brightness of the image to be displayed by the display panel is compensated by using the first compensation function is smaller than a degree at which the brightness of the image to be displayed by the display panel is compensated by using the second compensation function. ### Claim 8 (depends on 7) The apparatus according to claim 7, wherein the first compensation function is: Y=Gain*X*G′+Offset*O′; wherein Y is a grayscale of the image after the brightness of the image is compensated; X is a grayscale of the image before the brightness of the image is compensated; each of Gain, Offset, G′ and O′ is one of compensation parameters of the first compensation function; and the second compensation function is: Y = Beta * X 2 * B ′ + Gain * X * G ′ + Offset * O ′ ; wherein Y is a grayscale of the image after the brightness of the image is compensated; X is a grayscale of the image before the brightness of the image is compensated; each of Beta, Gain, Offset, B′, G′ and O′ is one of compensation parameters of the second compensation function. ### Claim 9 (depends on 7) The apparatus according to claim 7, wherein the brightness compensation module further comprises: a third compensation unit configured to compensate for the brightness of the image to be displayed by the display panel by using a third compensation function after the brightness value of the display panel is determined to be within a third brightness range based on the brightness value of the display panel; wherein the first corresponding relationship further comprises: a corresponding relationship between the third brightness range and the third compensation function, and an upper limit value of the third brightness range is smaller than an upper limit value of the first brightness range, and greater than the upper limit value of the second brightness range. ### Claim 10 A display device, comprising: a display panel, a processor, and a memory for storing at least one executable instruction of the processor, wherein the processor is configured to execute a method for compensating for brightness of a display panel, and the method comprise: acquiring a brightness value of the display panel; acquiring, based on the brightness value of the display panel, a compensation function corresponding to the brightness value, and compensation parameters of the compensation function; and compensating for brightness of an image to be displayed by the display panel by using the compensation function corresponding to the brightness value; wherein a degree at which the brightness of the image to be displayed by the display panel is compensated is negatively correlated with the brightness value of the display panel, wherein acquiring, based on the brightness value of the display panel, the compensation function corresponding to the brightness value, and the compensation parameters of the compensation function comprises: acquiring the compensation function corresponding to the brightness value, based on the brightness value of the display panel and a first corresponding relationship between brightness values of the display panel and compensation functions; and acquiring the compensation parameters of the compensation function corresponding to the brightness value, based on the brightness value of the display panel and a second corresponding relationship between the brightness values of the display panel and groups of compensation parameters, wherein compensating for the brightness of the image to be displayed by the display panel by using the compensation function corresponding to the brightness value comprises: compensating for the brightness of the image to be displayed by the display panel by using a first compensation function, after the brightness value of the display panel is determined to be within a first brightness range based on the brightness value of the display panel; and compensating for the brightness of the image to be displayed by the display panel by using a second compensation function, after the brightness value of the display panel is determined to be within a second brightness range based on the brightness value of the display panel, wherein the first corresponding relationship comprises: a corresponding relationship between the first brightness range and the first compensation function, and a corresponding relationship between the second brightness range and the second compensation function; and a lower limit value of the first brightness range is greater than an upper limit value of the second brightness range, and a degree at which the brightness of the image to be displayed by the display panel is compensated by using the first compensation function is smaller than a degree at which the brightness of the image to be displayed by the display panel is compensated by using the second compensation function. ### Claim 11 (depends on 1) A non-transitory computer-readable storage medium, storing at least one instruction executable by a processor; wherein the at least one instruction, when loaded and executed by the processor, causes the processor to perform the method according to claim 1. ### Claim 12 (depends on 10) The display device according to claim 10, wherein the first compensation function is: Y=Gain*X*G′+Offset*O′; wherein Y is a grayscale of the image after the brightness of the image is compensated; X is a grayscale of the image before the brightness of the image is compensated; each of Gain, Offset, G′ and O′ is one of compensation parameters of the first compensation function; and the second compensation function is: Y=Beta*X2*B′+Gain*X*G′+Offset*O′; wherein Y is a grayscale of the image after the brightness of the image is compensated; X is a grayscale of the image before the brightness of the image is compensated; each of Beta, Gain, Offset, B′, G′ and O′ is one of compensation parameters of the second compensation function. ### Claim 13 (depends on 10) The display device according to claim 10, wherein compensating for the brightness of the image to be displayed by the display panel by using the compensation function corresponding to the brightness value further comprises: compensating for the brightness of the image to be displayed by the display panel by using a third compensation function, after the brightness value of the display panel is determined to be within a third brightness range based on the brightness value of the display panel; wherein the first corresponding relationship further comprises: a corresponding relationship between the third brightness range and the third compensation function, and an upper limit value of the third brightness range is smaller than an upper limit value of the first brightness range, and greater than the upper limit value of the second brightness range. ### Claim 14 (depends on 13) The display device according to claim 13, wherein the third compensation function is: Y=Beta*X2+Gain*X+Offset*O′; wherein Y is a grayscale of the image after the brightness of the image is compensated; X is a grayscale of the image before the brightness of the image is compensated; each of Beta, Gain, Offset and O′ is one of compensation parameters of the third compensation function.