# US 12,183,244 B2 · Display apparatus and control method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,244 B2 - Document ID: US12183244B2 - Status: Granted - Kind: B2 - Application number: 18/196,171 - Filed: 2023-05-11 - Published: 2024-01-11 - Granted: 2024-12-31 - Earliest claimed: 2022-07-05 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Moonhee Kim - Web page: https://patentgrep.com/patent/US12183244B2 ## CPC - 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 3/2007: {Display of intermediate tones} - G09G 5/10: Intensity circuits - G09G 2320/0257: Reduction of after-image effects - G09G 2320/046: Dealing with screen burn-in prevention or compensation of the effects thereof - G09G 2320/0613: The adjustment depending on the type of the information to be displayed - G09G 2320/0686: with two or more screen areas displaying information with different brightness or colours - G09G 2340/16: Determination of a pixel data signal depending on the signal applied in the previous frame - G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data - 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 Disclosed is a display apparatus. The display apparatus includes a display; and at least one processor connected to the display and configured to control the display apparatus, and the processor may, based on a pixel value included in an input image, identify an area in the input image, identify a threshold grayscale value based on histogram information of the identified area, identify an area having a grayscale value equal to or greater than the threshold grayscale in the identified area as a first area and identify a remaining area as a second area, and control the display to reduce luminance of the first area according to a first luminance adjustment scheme and adjust luminance of a second area according to a second luminance adjustment scheme. ## Claims ### Claim 1 A display apparatus comprising: a display; and at least one processor configured to: based on pixel values included in an input image, identify an area in the input image that is less than an entire area of the input image and includes a logo area and background area around the logo area, identify a threshold grayscale value based on histogram information of the identified area, identify an area having a grayscale value equal to or greater than the threshold grayscale value in the identified area in the input image as a first area that includes the logo area and identify a remaining area in the identified area in the input image as a second area that includes the background area, and control the display to reduce luminance of the first area according to a first luminance adjustment scheme to reduce generation of an afterimage of the logo area, and adjust luminance of a second area according to a second luminance adjustment scheme to reduce deterioration of image quality due to the reduction of luminance of the first area. ### Claim 2 (depends on 1) The display apparatus of claim 1, wherein the first luminance adjustment scheme reduces luminance at a predetermined ratio, and the second luminance adjustment scheme adjusts luminance at a different ratio according to grayscale value. ### Claim 3 (depends on 1) The display apparatus of claim 1, wherein: the first luminance adjustment scheme maintains luminance to a preset luminance, and the second luminance adjustment scheme outputs luminance corresponding to a grayscale value. ### Claim 4 (depends on 1) The display apparatus of claim 1, wherein the at least one processor is further configured to; update the threshold grayscale value by applying a preset weight to the threshold grayscale value, identify, in the identified area in the input image, an area having a grayscale value equal to or greater than the updated threshold grayscale value as the first area and identify a remaining area in the identified area in the input image as the second area, wherein the preset weight is greater than or equal to 1. ### Claim 5 (depends on 1) The display apparatus of claim 1, wherein the at least one processor is further configured to: update the threshold grayscale value based on the threshold grayscale value and a minimum grayscale value in the logo area, and identify an area having a grayscale value greater than or equal to the updated threshold grayscale value in the identified area in the input image as the first area and identify a remaining area in the identified area in the input image as the second area. ### Claim 6 (depends on 1) The display apparatus of claim 1, wherein the at least one processor is further configured to: identify the threshold grayscale value based on at least one of an average value of grayscale values of pixels included in the identified area in the input image, average picture level (APL), and binarization algorithm. ### Claim 7 (depends on 1) The display apparatus of claim 1, wherein the at least one processor is further configured to: obtain a number of pixels in which a difference of a pixel value between adjacent pixels in the identified area in the input image is less than a preset value as flat information, and adjust a size of the second area based on the flat information. ### Claim 8 (depends on 7) The display apparatus of claim 7, wherein the at least one processor is further configured to: obtain a number of pixels in which a difference of a pixel value between adjacent pixels in the identified area in the input image and a neighboring area of the identified area in the input image is less than the preset value as the flat information. ### Claim 9 (depends on 7) The display apparatus of claim 7, wherein the at least one processor is further configured to: enlarge the second area based on the flat information being greater than or equal to a threshold value, and reduce the second area based on the flat information being less than the threshold value. ### Claim 10 (depends on 1) The display apparatus of claim 1, wherein the at least one processor is further configured to: identify the area in the input image by comparing corresponding pixel values in at least two frames among a plurality of frames included in the input image. ### Claim 11 (depends on 10) The display apparatus of claim 10, wherein the at least one processor is further configured to: identify each of the plurality of frames as a plurality of areas, and identify one of the plurality of areas as the area in the input image by comparing pixel values corresponding to each of the plurality of areas in at least some of the plurality of frames. ### Claim 12 A method comprising: based on pixel values included in an input image, identifying an area in the input image that is less than an entire area of the input image and includes a logo area and a background area around the logo area; identifying a threshold grayscale value based on histogram information of the identified area; identifying an area having a grayscale value equal to or greater than the threshold grayscale value in the identified area in the input image as a first area that includes the logo area and identify a remaining area in the identified area in the input image as a second area that includes the background area; and reducing luminance of the first area according to a first luminance adjustment scheme to reduce generation of an afterimage of the logo area and adjusting luminance of a second area according to a second luminance adjustment scheme to reduce deterioration of image quality due to the reduction of luminance of the first area. ### Claim 13 (depends on 12) The method of claim 12, wherein: the first luminance adjustment scheme reduces luminance at a predetermined ratio; and the second luminance adjustment scheme adjusts luminance at a different ratio according to grayscale value. ### Claim 14 (depends on 12) The method of claim 12, wherein: the first luminance adjustment scheme maintains luminance to a preset luminance; and the second luminance adjustment scheme outputs luminance corresponding to a grayscale value. ### Claim 15 (depends on 12) The method of claim 12, further comprising: updating the threshold grayscale value by applying a preset weight to the threshold grayscale value, wherein the identifying an area comprises identifying, in the identified area in the input image, an area having a grayscale value equal to or greater than the updated threshold grayscale value as the first area, and the identifying a remaining area comprises identifying a remaining area in the identified area in the input image as the second area, wherein the preset weight is greater than or equal to 1. ### Claim 16 (depends on 12) The method of claim 12, further comprising: updating the threshold grayscale value based on the threshold grayscale value and a minimum grayscale value in the logo area, and wherein the identifying an area comprises identifying an area having a grayscale value greater than or equal to the updated threshold grayscale value in the identified area in the input image as the first area, and the identifying a remaining area comprises identifying a remaining area in the identified area in the input image as the second area. ### Claim 17 (depends on 12) The method of claim 12, wherein the identifying the threshold grayscale value comprises identifying the threshold grayscale value based on at least one of an average value of grayscale values of pixels included in the identified area in the input image, average picture level (APL), and binarization algorithm. ### Claim 18 (depends on 12) The method of claim 12, further comprising: obtaining a number of pixels in which a difference of a pixel value between adjacent pixels in the identified area in the input image is less than a preset value as flat information, and adjusting a size of the second area based on the flat information. ### Claim 19 (depends on 18) The method of claim 18, wherein the obtaining comprises obtaining a number of pixels in which a difference of a pixel value between adjacent pixels in the identified area in the input image and a neighboring area of the identified area in the input image is less than the preset value as the flat information. ### Claim 20 (depends on 18) The method of claim 18, wherein the adjusting the second area comprises enlarging the second area based on the flat information being greater than or equal to a threshold value, and reducing the second area based on the flat information being less than the threshold value.