# US 2023/0273697 A1 · Display device and method of driving display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0273697 A1 - Document ID: US20230273697A1 - Status: Published application - Kind: A1 - Application number: 18/095,241 - Filed: 2023-01-10 - Published: 2023-08-31 - Earliest claimed: 2022-02-28 - Assignees: Sharp Display Technology Corporation - Applicants: Sharp Display Technology Corporation - Inventors: Jin MIYAZAWA; Noriyuki TANAKA; Daiji KITAGAWA; Tatsuhiko SUYAMA; Yousuke NAKAMURA; Daisuke SUEHIRO - Web page: https://patentgrep.com/patent/US20230273697A1 ## CPC - G06F 3/04166: {Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184)} - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/04184: {Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally} - G06F 3/044: by capacitive means - G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A display device includes: a display panel including a sensor unit configured to detect a touch operation; a first control unit configured to supply a first signal to the display panel; and a second control unit configured to calculate touch information related to the touch operation and to supply the touch information to the first control unit. The first control unit includes: a signal generator configured to generate the first signal based on an image signal supplied from an external image signal supply source; and an overdrive circuit configured to perform a process of increasing an amplitude of the first signal generated by the signal generator. The overdrive circuit is actuated based on the touch information from the second control unit. The first control unit, in response to the actuation of the overdrive circuit, supplies the first signal having the amplitude increased by the overdrive circuit to the display panel. ## Claims ### Claim 1 A display device comprising: a display panel including: a display screen on which an image is displayed; and a sensor unit configured to detect a touch operation on the display screen; a first control unit configured to supply a first signal to the display panel to display the image; and a second control unit configured to calculate touch information related to the touch operation based on a sensor signal from the sensor unit and to supply the touch information to the first control unit, wherein the first control unit includes: a signal generator configured to generate the first signal based on an image signal supplied from an external image signal supply source; and an overdrive circuit configured to perform a process of increasing an amplitude of the first signal generated by the signal generator, the overdrive circuit is actuated based on the touch information from the second control unit, and the first control unit, in response to the actuation of the overdrive circuit, supplies the first signal having the amplitude increased by the overdrive circuit to the display panel. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the first control unit determines, based on the touch information from the second control unit, whether or not a touch operation is being performed, and the overdrive circuit is actuated in response to a determination that a touch operation is being performed. ### Claim 3 (depends on 2) The display device according to claim 2, wherein the overdrive circuit remains actuated from the determination that a touch operation is being performed until a determination that no touch operation is being performed. ### Claim 4 (depends on 3) The display device according to claim 3, wherein the overdrive circuit remains actuated for a prescribed time after the determination that no touch operation is being performed. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the first control unit determines, based on the touch information from the second control unit, whether or not a touch operation is being performed, and the overdrive circuit is actuated in response to a determination that a touch operation involving an acceleration greater than or equal to a threshold value is being performed. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the signal generator generates the first signal as discretized gray level values, and the overdrive circuit performs a process of increasing the gray level values. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the sensor unit is a sensor electrode configured to detect the sensor signal by an electrostatic capacity scheme. ### Claim 8 (depends on 1) The display device according to claim 1, wherein the display panel is a liquid crystal panel including a liquid crystal layer containing liquid crystal molecules that change alignment. ### Claim 9 A method of driving a display device including a display panel having a touch panel function, the method comprising: generating, based on an image signal supplied from an external image signal supply source, a first signal to display an image; calculating touch information related to a touch operation based on a sensor signal supplied from a sensor unit that detects the touch operation on a display screen; determining, based on the touch information, whether or not a touch operation is being performed; and in response to a determination that a touch operation is being performed, actuating an overdrive circuit that performs a process of increasing an amplitude of the first signal and supplying the first signal having the amplitude increased by the overdrive circuit to the display panel. ### Claim 10 (depends on 9) The method according to claim 9, wherein the overdrive circuit remains actuated from the determination that a touch operation is being performed until a determination that no touch operation is being performed. ### Claim 11 (depends on 10) The method according to claim 10, wherein the overdrive circuit remains actuated for a prescribed time after the determination that no touch operation is being performed. ### Claim 12 (depends on 9) The method according to claim 9, wherein the overdrive circuit is actuated in response to a determination that a touch operation involving an acceleration greater than or equal to a threshold value is being performed. ### Claim 13 (depends on 9) The method according to claim 9, wherein the method comprises generating the first signal as discretized gray level values, and the overdrive circuit performs a process of increasing the gray level values. ### Claim 14 (depends on 9) The method according to claim 9, wherein the sensor unit is a sensor electrode that detects the sensor signal by an electrostatic capacity scheme. ### Claim 15 (depends on 9) The method according to claim 9, wherein the display panel is a liquid crystal panel including a liquid crystal layer containing liquid crystal molecules that change alignment.