# US 12,183,253 B2 · Display apparatus and method of driving the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,253 B2 - Document ID: US12183253B2 - Status: Granted - Kind: B2 - Application number: 17/990,171 - Filed: 2022-11-18 - Published: 2023-05-25 - Granted: 2024-12-31 - Earliest claimed: 2021-11-19 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Sungjae Park; Seunghwan Park; Namjae Lim; Youngwoon Choi; Sung-Mo Yang; Jinho Lee - Web page: https://patentgrep.com/patent/US12183253B2 ## 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 3/2092: {Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165)} - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - G09G 5/10: Intensity circuits - G09G 2310/0275: Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current - G09G 2310/061: for resetting or blanking - G09G 2320/0257: Reduction of after-image effects - G09G 2320/0261: in the context of movement of objects on the screen or movement of the observer relative to the screen - G09G 2320/0271: Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping - G09G 2320/103: Detection of image changes, e.g. determination of an index representative of the image change - G09G 2330/021: Power management, e.g. power saving - G09G 2330/028: Generation of voltages supplied to electrode drivers in a matrix display other than LCD - 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 A display apparatus includes: a display panel; a driving controller, which receives input image data including a plurality of normal image frames and a plurality of black image frames, receives a flag indicating a type of each of frames included in the input image data, generates intermediate image data by adjusting a grayscale of the input image data based on the input image data and the flag, and generates a data signal based on the intermediate image data where the type includes a normal image frame and a black image frame; and a data driver, which generates a data voltage based on the data signal and outputs the data voltage to the display panel. ## Claims ### Claim 1 A display apparatus comprising: a display panel; a driving controller, which receives input image data including a plurality of normal image frames and a plurality of black image frames, receives a flag indicating a type of each of frames included in the input image data, generates intermediate image data by adjusting a grayscale of the input image data based on the input image data and the flag, and generates a data signal based on the intermediate image data, wherein the type includes a normal image frame and a black image frame; and a data driver, which generates a data voltage based on the data signal and outputs the data voltage to the display panel, wherein the driving controller includes a net power controller, which generates a first scale factor based on an N-th frame among the frames included in the input image data, generates a second scale factor by reflecting a compensation value in the first scale factor, and generates the intermediate image data by adjusting a grayscale of an (N+1)-th frame by applying the second scale factor corresponding to the N-th frame if the N-th frame is the normal image frame and by applying the second scale factor corresponding to the (N−1)-th frame if the N-th frame is the black image frame, and wherein N is a natural number equal to or greater than 2. ### Claim 2 (depends on 1) The display apparatus of claim 1, wherein in the input image data, the normal image frames and the black image frames are alternated. ### Claim 3 (depends on 2) The display apparatus of claim 2, wherein the flag indicates whether each of the frames included in the input image data is the normal image frame or the black image frame. ### Claim 4 (depends on 1) The display apparatus of claim 1, wherein the driving controller further includes a logo compensator, which determines that a logo is included in the input image data, when a fixed image within a reference size range in the frames included in the input image data is maintained for a predetermined number of frames, and generates a first compensation value to compensate the first scale factor. ### Claim 5 (depends on 4) The display apparatus of claim 4, wherein the logo compensator determines that the logo is included in the input image data, when the fixed image is maintained in the normal image frames among the frames included in the input image data for a predetermined number of the normal image frames. ### Claim 6 (depends on 4) The display apparatus of claim 4, wherein the logo compensator determines that the logo is included in the input image data, when the fixed image is maintained in the predetermined number of the frames included in the input image data, determine that the fixed image exists in the N-th frame when the fixed image exists in an (N−1)-th frame if the N-th frame is the black image frame, and determine that the fixed image does not exist in the N-th frame when the fixed image does not exist in the (N−1)-th frame if the N-th frame is the black image frame. ### Claim 7 (depends on 1) The display apparatus of claim 1, wherein the driving controller further includes a screen saver, which determines that a still image is included in the input image data, when a same image in the frames included in the input image data is maintained for a predetermined number of frames, and generates a second compensation value to compensate the first scale factor. ### Claim 8 (depends on 7) The display apparatus of claim 7, wherein the screen saver determines that the still image is included in the input image data, when the same image is maintained in the normal image frames among the frames included in the input image data for the predetermined number of the normal image frames. ### Claim 9 (depends on 7) The display apparatus of claim 7, wherein the screen saver determines that the still image is included in the input image data, when the same image is maintained in the predetermined number of the frames included in the input image data, and determines whether the N-th frame includes the same image as an (N−1)-th frame if the N-th frame is the black image frame. ### Claim 10 (depends on 1) The display apparatus of claim 1, wherein the driving controller further includes a global current manager, which calculates a target current based on and the N-th frame and the first scale factor generated based on the N-th frame, and generates a third compensation value to compensate the first scale factor by comparing the target current and a sensing current of the display panel. ### Claim 11 (depends on 10) The display apparatus of claim 10, wherein if the N-th frame is the black image frame, the global current manager generates a same value as the third compensation value corresponding to a (N−1)-th frame to the third compensation value corresponding to the N-th frame. ### Claim 12 (depends on 1) The display apparatus of claim 1, further comprising a power voltage generator, which generates a power voltage and outputs the power voltage to the display panel, and wherein the driving controller further includes a power voltage compensator, which generates a power voltage control signal based on the N-th frame and the first scale factor generated based on the N-th frame, and the power voltage generator generates the power voltage of an (N+1)-th frame by reflecting the power voltage control signal corresponding to the N-th frame. ### Claim 13 (depends on 12) The display apparatus of claim 12, wherein if the N-th frame is the black image frame, the power voltage compensator generates a same signal as the power voltage control signal corresponding to an (N−1)-th frame to the power voltage control signal corresponding to the N-th frame. ### Claim 14 A display apparatus comprising: a display panel; a driving controller, which receives input image data including a plurality of normal image frames, converts some of the normal image frames into black image frames by adjusting a grayscale of the input image data, and generates a data signal based on the converted input image data; and a data driver, which generates a data voltage based on the data signal and outputs the data voltage to the display panel. ### Claim 15 (depends on 14) The display apparatus of claim 14, wherein the driving controller includes a net power controller, which generates a first scale factor based on a K-th frame among the normal image frames included in the input image data, generates a second scale factor by reflecting a compensation value in the first scale factor, and converts the input image data by adjusting a grayscale of a (K+1)-th frame by applying the second scale factor corresponding to the K-th frame, and the net power controller generates the second scale factor as 0 with respect to any one of odd-numbered frames and even-numbered frames among the normal image frames included in the input image data, wherein K is a natural number equal to or greater than 1. ### Claim 16 (depends on 15) The display apparatus of claim 15, wherein the driving controller further includes a logo compensator, which determines that a logo is included in the input image data, when a fixed image within a reference size range in the normal image frames included in the input image data is maintained for a predetermined number of frames, and generates a first compensation value to compensate the first scale factor. ### Claim 17 (depends on 15) The display apparatus of claim 15, wherein the driving controller further includes a screen saver, which determines that a still image is included in the input image data, when a same image in the normal image frames included in the input image data is maintained for a predetermined number of frames, and generates a second compensation value to compensate the first scale factor. ### Claim 18 (depends on 15) The display apparatus of claim 15, wherein the driving controller further includes a global current manager, which calculates a target current based on the N-th frame and the first scale factor generated based on the N-th frame, and generates a third compensation value to compensate the first scale factor by comparing the target current and a sensing current of the display panel. ### Claim 19 (depends on 15) The display apparatus of claim 15, further comprising a power voltage generator, which generates a power voltage and outputs the power voltage to the display panel, and wherein the driving controller further includes a power voltage compensator, which generates a power voltage control signal based on the K-th frame and the first scale factor generated based on the K-th frame, and the power voltage generator generates the power voltage of a (K+1)-th frame by reflecting the power voltage control signal corresponding to the K-th frame. ### Claim 20 A method of driving a display apparatus, the method comprising: receiving input image data including a plurality of normal image frames and a plurality of black image frames and receiving a flag indicating a type of each of frames included in the input image data, wherein the type includes a normal image frame and a black image frame; generating intermediate image data by adjusting a grayscale of the input image data based on the input image data and the flag; generating a data signal based on the intermediate image data; and generating a data voltage based on the data signal and outputting the data voltage to the display panel, wherein the generating intermediate image data comprises: generating a first scale factor based on an N-th frame among the frames included in the input image data, generating a second scale factor by reflecting a compensation value in the first scale factor, and generating the intermediate image data by adjusting a grayscale of an (N+1)-th frame by applying the second scale factor corresponding to the N-th frame in a case that the N-th frame is the normal image frame and by applying the second scale factor corresponding to an (N−1)-th frame in a case that the N-th frame is the black image frame, wherein N is a natural number equal to or greater than 2. ### Claim 21 (depends on 20) The method of claim 20, wherein in the input image data, the normal image frames and the black image frames are alternated. ### Claim 22 (depends on 21) The method of claim 21, wherein the flag indicates whether each of the frames included in the input image data is the normal image frame or the black image frame.