# US 12,112,682 B2 · Display apparatus and method of driving display panel using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,112,682 B2 - Document ID: US12112682B2 - Status: Granted - Kind: B2 - Application number: 17/895,623 - Filed: 2022-08-25 - Published: 2023-06-01 - Granted: 2024-10-08 - Earliest claimed: 2021-11-29 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Seongjun Kim; Youngsoo Sohn; Jae Woo Ryu; Kwan-Young Oh; Seungyoung Choi - Web page: https://patentgrep.com/patent/US12112682B2 ## CPC - 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 3/2096: {Details of the interface to the display terminal specific for a flat panel (suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167)} - G09G 2310/0248: Precharge or discharge of column electrodes before or after applying exact column voltages - G09G 2310/0251: Precharge or discharge of pixel before applying new pixel voltage - G09G 2310/027: Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters - G09G 2310/0294: Details of sampling or holding circuits arranged for use in a driver for data electrodes - G09G 2320/0238: Improving the black level - 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, a gate driver and a data driver. The driving controller is configured to insert a compensation image to first image data including a normal image to generate second image data. The gate driver is configured to shift an output time of a gate signal and to output the gate signal having a shifted output time to the display panel. The data driver is configured to generate a data voltage based on the second image data and to output the data voltage to the display panel. A gate shift amount when the compensation image is applied is substantially the same as a gate shift amount immediately before the compensation image is applied. ## Claims ### Claim 1 A display apparatus comprising: a display panel; a driving controller inserting a compensation image to first image data including a normal image to generate second image data; a gate driver shifting an output time of a gate signal and outputting the gate signal having a shifted output time to the display panel; and a data driver generating a data voltage based on the second image data and outputting the data voltage to the display panel, wherein a gate shift value of a gate signal applied to a gate line for applying the compensation image is the same as a gate shift value of a gate line disposed immediately before the gate line for applying the compensation image, wherein the gate shift value is a difference in time between a gate signal applied to pixels connected to one gate line and data voltages applied to the pixels connected to the one gate line, and wherein the driving controller determines a compensation counting value corresponding to the compensation image. ### Claim 2 (depends on 1) The display apparatus of claim 1, wherein the driving controller determines a data counting value only corresponding to the normal image, and wherein the gate driver shifts an output time of the gate signal based on the data counting value. ### Claim 3 (depends on 2) The display apparatus of claim 2, wherein the data counting value is equal to a value obtained by subtracting a second line counting value corresponding to the compensation image from a first line counting value corresponding to the normal images and the compensation images. ### Claim 4 (depends on 2) The display apparatus of claim 2, wherein the driving controller includes a compensation image inserter generating the second image data based on the first image data and adding a pulse corresponding to the compensation image to a first data enable signal corresponding to the first image data to generate a second data enable signal corresponding to the second image data. ### Claim 5 (depends on 4) The display apparatus of claim 4, wherein the compensation image inserter generates a compensation flag corresponding to the compensation image. ### Claim 6 (depends on 5) The display apparatus of claim 5, wherein the driving controller further comprises: a gate shifter determining the data counting value and the compensation counting value corresponding to the compensation image based on the compensation flag and the second data enable signal, determining a first shift value of the gate signal based on the data counting value and a second shift value of a compensation gate signal based on the compensation counting value, and outputting the first shift value and the second shift value to the gate driver. ### Claim 7 (depends on 6) The display apparatus of claim 6, wherein the gate shifter accumulates active pulses of the second data enable signal to generate the data counting value when the compensation flag has an inactive state. ### Claim 8 (depends on 6) The display apparatus of claim 6, wherein the gate shifter determines the compensation counting value by multiplying a number of active pulses of the compensation flag by a number of gate lines for simultaneously writing the compensation image. ### Claim 9 (depends on 6) The display apparatus of claim 6, wherein the gate driver shifts the gate signal based on the first shift value, shifts the compensation gate signal based on the second shift value and outputs the gate signal and the compensation gate signal to the display panel. ### Claim 10 (depends on 4) The display apparatus of claim 4, wherein the driving controller further comprises: a gate shifter generating a compensation flag corresponding to the compensation image, determining the data counting value and the compensation counting value corresponding to the compensation image based on the compensation flag and the second data enable signal, determining a first shift value of the gate signal based on the data counting value and a second shift value of a compensation gate signal based on the compensation counting value, and outputting the first shift value and the second shift value to the gate driver. ### Claim 11 (depends on 1) The display apparatus of claim 1, wherein the gate driver shifts an output time of a compensation gate signal based on the compensation counting value and outputs the compensation gate signal having a shifted output time to the display panel. ### Claim 12 (depends on 1) The display apparatus of claim 1, wherein the second image data include the normal image, a black image having a black grayscale value and a precharge image for precharging a pixel prior to charging the normal image to the pixel. ### Claim 13 (depends on 12) The display apparatus of claim 12, wherein a first unit of the first image data includes eight normal images and a second unit of the second image data includes eight normal images, one black image and one precharge image, and wherein the first unit and the second unit have the same time duration. ### Claim 14 (depends on 1) The display apparatus of claim 1, wherein the second image data include the normal image and a black image having a black grayscale value. ### Claim 15 (depends on 14) The display apparatus of claim 14, wherein a first unit of the first image data includes eight normal images and a second unit of the second image data includes eight normal images and two black images, and wherein the first unit and the second unit have the same time duration. ### Claim 16 (depends on 14) The display apparatus of claim 14, wherein a first unit of the first image data includes eight normal images and a second unit of the second image data includes eight normal images and one black image, and wherein the first unit and the second unit have the same time duration. ### Claim 17 A method of driving a display panel, the method comprising: inserting a compensation image to first image data including a normal image to generate second image data; determining a compensation counting value corresponding to the compensation image; shifting an output time of a gate signal; outputting the gate signal having a shifted output time to the display panel; generating a data voltage based on the second image data; and outputting the data voltage to the display panel, wherein a gate shift value of a gate signal applied to a gate line for applying the compensation image is the same as a gate shift value of a gate line disposed immediately before the gate line for applying the compensation image, and wherein the gate shift value is a difference in time between a gate signal applied to pixels connected to one gate line and data voltages applied to the pixels connected to the one gate line. ### Claim 18 (depends on 17) The method of claim 17, further comprising determining a data counting value corresponding to the normal image, wherein an output time of the gate signal is shifted based on the data counting value. ### Claim 19 (depends on 18) The method of claim 18, wherein the data counting value is equal to a value obtained by subtracting a second line counting value corresponding to the compensation image from a first line counting value corresponding to the normal images and the compensation images. ### Claim 20 (depends on 17) The method of claim 17, further comprising: shifting an output time of a compensation gate signal based on the compensation counting value; and outputting the compensation gate signal having a shifted output time to the display panel. ### Claim 21 A display apparatus comprising: a display panel; a driving controller inserting a compensation image to first image data including a normal image to generate second image data; a gate driver shifting an output time of a gate signal and outputting the gate signal having a shifted output time to the display panel; and a data driver generating a data voltage based on the second image data and outputting the data voltage to the display panel, wherein, when an L-th compensation image is inserted between an M-th normal image and an M+1-th normal image, a second interval between an M-th gate pulse corresponding to the M-th normal image and an M+1-th gate pulse corresponding to the M+1-th normal image is greater than a first interval between an M−1-th gate pulse corresponding to an M−1-th normal image and the M-th gate pulse corresponding to the M-th normal image, where M is a positive integer equal to or greater than two and L is a positive integer, wherein, when a number of the compensation images inserted between the M-th normal image and the M+1-th normal image is N, the second interval is N+1 times the first interval, where N is a positive integer equal to or greater than 1, and wherein the driving controller determines a compensation counting value corresponding to the compensation image. ### Claim 22 (depends on 21) The display apparatus of claim 21, wherein N is two. ### Claim 23 (depends on 21) The display apparatus of claim 21, wherein N is one. ### Claim 24 A display driving system comprising: a driving controller inserting a compensation image to first image data including a normal image to generate second image data; a gate driver shifting an output time of a gate signal and outputting the gate signal having a shifted output time; and a data driver generating a data voltage based on the second image data and outputting the data voltage, wherein a gate shift value of a gate signal applied to a gate line for applying the compensation image is the same as a gate shift value of a gate line disposed immediately before the gate line for applying the compensation image, wherein the gate shift value is a difference in time between a gate signal applied to pixels connected to one gate line and data voltages applied to the pixels connected to the one gate line, and wherein the driving controller determines a compensation counting value corresponding to the compensation image. ### Claim 25 (depends on 24) The display driving system of claim 24, wherein the driving controller is determining a data counting value only corresponding to the normal image, and wherein the gate driver is shifting an output time of the gate signal based on the data counting value. ### Claim 26 (depends on 25) The display driving system of claim 25, wherein the data counting value is equal to a value obtained by subtracting a second line counting value corresponding to the compensation image from a first line counting value corresponding to the normal images and the compensation images. ### Claim 27 (depends on 24) The display driving system of claim 24, wherein the gate driver shifts an output time of a compensation gate signal based on the compensation counting value and outputs the compensation gate signal having a shifted output time. ### Claim 28 (depends on 24) The display driving system of claim 24, wherein the driving controller and the data driver are integrally formed.