# US 12,008,196 B2 · Input detection system and detection device that detect external resonant input support devices and touch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,008,196 B2 - Document ID: US12008196B2 - Status: Granted - Kind: B2 - Application number: 17/838,685 - Filed: 2022-06-13 - Published: 2022-12-15 - Granted: 2024-06-11 - Earliest claimed: 2021-06-15 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Makoto Hayashi; Yuto Kakinoki; Takaaki Kono - Web page: https://patentgrep.com/patent/US12008196B2 ## 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 3/03547: {Touch pads, in which fingers can move on a surface} - G06F 3/0362: with detection of one-dimensional [1D] translations or rotations of an operating part of the device, e.g. scroll wheels, sliders, knobs, rollers or belts - G06F 3/038: Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry - G06F 3/0383: {Signal control means within the pointing device} - G06F 3/0393: {Accessories for touch pads or touch screens, e.g. mechanical guides added to touch screens for drawing straight lines, hard keys overlaying touch screens or touch pads} - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F 2203/0384: Wireless input, i.e. hardware and software details of wireless interface arrangements for pointing devices - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract An input detection system includes a display device with a detection function including a plurality of pixels, a plurality of drive electrodes, and a plurality of detection electrodes arrayed in a display region, an input device including an LC circuit, a first electrode coupled to one end side of the LC circuit, and a second electrode coupled to the other end side of the LC circuit, and a drive electrode scan circuit configured to supply a drive signal to the drive electrodes. ## Claims ### Claim 1 An input detection system comprising: a display device with a detection function including a plurality of pixels, a plurality of drive electrodes, and a plurality of detection electrodes arrayed in a display region; an input device including an inductor-capacitor (LC) circuit, a first electrode coupled to one end side of the LC circuit, and a second electrode coupled to the other end side of the LC circuit; and a drive electrode scan circuit configured to supply a drive signal to the drive electrodes, wherein the display device with the detection function executes a plurality of first display periods, a plurality of first detection periods, a plurality of second display periods, and a plurality of second detection periods in a time division manner, first drive periods correspond to the first detection periods and in which the drive electrode scan circuit supplies the drive signal to the drive electrodes, second drive periods correspond to the second detection periods and in which the drive electrode scan circuit supplies the drive signal to the drive electrodes, the first drive periods are longer than the second drive periods, first non-drive periods are periods between the first display periods and the first drive periods and in which the drive electrode scan circuit does not supply the drive signal to the drive electrodes, second non-drive periods are periods between the second display periods and the second drive periods and in which the drive electrode scan circuit does not supply the drive signal to the drive electrodes, the first non-drive periods are shorter than the second non-drive periods, and a total period of the first drive periods and the first non-drive periods is equal to a total period of the second drive periods and the second non-drive periods. ### Claim 2 (depends on 1) The input detection system according to claim 1, wherein periods until supply of the drive signal is started in the first drive periods after the first display periods are shorter than periods until supply of the drive signal is started in the second drive periods after the second display periods. ### Claim 3 (depends on 1) The input detection system according to claim 1, including a detection circuit to which detection signals are supplied from the detection electrodes, wherein the first detection periods are periods in which the detection circuit outputs first detection values based on the detection signals supplied in the first drive periods, and the second detection periods are periods in which the detection circuit outputs second detection values based on the detection signals supplied in the second drive periods. ### Claim 4 (depends on 3) The input detection system according to claim 3, wherein as for one of the first detection periods, the first drive period is longer than the first detection period, and start timing of the first drive period is earlier than start timing of the first detection period. ### Claim 5 (depends on 4) The input detection system according to claim 4, wherein first non-detection periods are periods between the first display periods and the first detection periods and in which the detection circuit outputs no first detection value, second non-detection periods that are periods between the second display periods and the second detection periods and in which the detection circuit outputs no second detection value, and the first non-detection periods overlap with parts of the first drive periods. ### Claim 6 (depends on 3) The input detection system according to claim 3, wherein lengths of the first drive periods are the same as lengths of the first detection periods, lengths of the second drive periods are the same as lengths of the second detection periods, and the first detection periods are longer than the second detection periods. ### Claim 7 (depends on 1) The input detection system according to claim 1, wherein the drive electrode scan circuit supplies a first drive signal having a resonant frequency of the LC circuit to the drive electrodes in the first detection periods and supplies a second drive signal having a frequency different from the resonant frequency to the drive electrodes in the second detection periods. ### Claim 8 (depends on 1) The input detection system according to claim 1, wherein the drive electrode scan circuit supplies a first drive signal having a resonant frequency of the LC circuit to the drive electrodes in the first detection periods and the second detection periods. ### Claim 9 A detection device in which an input device including an inductor-capacitor (LC) circuit and a first electrode and a second electrode coupled to the LC circuit is arranged in a detection region, the detection device comprising: a plurality of drive electrodes and a plurality of detection electrodes arrayed in the detection region; and a drive electrode scan circuit configured to supply a drive signal to the drive electrodes, wherein a plurality of first detection periods and a plurality of second detection periods are executed in a time division manner, first drive periods correspond to the first detection periods and in which the drive electrode scan circuit supplies the drive signal to the drive electrodes, second drive periods correspond to the second detection periods and in which the drive electrode scan circuit supplies the drive signal to the drive electrodes are provided, a first non-drive period is a period before one of the first drive periods and in which the drive electrode scan circuit does not supply the drive signal to the drive electrodes, a second non-drive period is a period before one of the second drive periods and in which the drive electrode scan circuit does not supply the drive signal to the drive electrodes, the first drive periods are longer than the second drive periods, the first non-drive period is shorter than the second non-drive period, and a total period of the first non-drive period and the one of the first drive periods is equal to a total period of the second non-drive period and the one of the second drive periods.