# US 2014/0152617 A1 · Display device with touch detection function, drive method thereof, and electronic apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152617 A1 - Document ID: US20140152617A1 - Status: Published application - Kind: A1 - Application number: 14/098,157 - Filed: 2013-12-05 - Published: 2014-06-05 - Earliest claimed: 2012-12-05 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Yoshitoshi Kida; Koji Noguchi; Yasuyuki Teranishi; Hiroshi Mizuhashi; Kohei Azumi - Web page: https://patentgrep.com/patent/US20140152617A1 ## 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 3/04182: {Filtering of noise external to the device and not generated by digitiser components} - G06F 3/04184: {Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F 2203/04108: Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract According to an aspect, a display device with a touch detection function includes: a scan drive unit that supplies a touch drive signal to a touch detection element in a touch detection operation period different from a display operation period in which a pixel signal and a display drive signal are sequentially supplied to display elements to perform display scanning; and a noise detector that detects noise included in a frequency component sampled by a touch detection unit. When the noise detector detects the noise, the scan drive unit changes a frequency of the touch drive signal in the touch detection operation period and supplies the changed frequency to the touch detection element. ## Claims ### Claim 1 A display device with a touch detection function comprising: a plurality of display elements that perform a display operation based on a pixel signal and a display drive signal; a touch detection element that detects an external proximity object in accordance with a touch drive signal; a scan drive unit that supplies the touch drive signal to the touch detection element in a touch detection operation period different from a display operation period in which the pixel signal and the display drive signal are sequentially supplied to the display elements to perform display scanning; a touch detection unit that performs touch detection by sampling a detection result of the touch detection element at a timing synchronized with the touch drive signal; and a noise detector that detects noise included in a frequency component sampled by the touch detection unit, wherein the scan drive unit changes a frequency of the touch drive signal in the touch detection operation period and supplies the changed frequency to the touch detection element, when the noise detector detects the noise. ### Claim 2 (depends on 1) The display device with a touch detection function according to claim 1, wherein, when the noise detector detects the noise, the scan drive unit changes a ratio of one touch report period, in which touch detection for one screen is performed, to one frame period in which the display scanning for the one screen is performed. ### Claim 3 (depends on 1) The display device with a touch detection function according to claim 1, wherein, when the noise detector does not detect the noise, the scan drive unit supplies the touch drive signal to the touch detection element such that a sequence of a first display operation period, a first touch detection operation period, a second touch detection operation period, and a second display operation period is repeated, and, when the noise detector detects the noise, the scan drive unit sets the first touch detection operation period and the second touch detection operation period as one touch detection operation period, and changes a frequency of the touch drive signal. ### Claim 4 (depends on 1) The display device with a touch detection function according to claim 1, wherein the touch detection element uses a change in a capacitance in accordance with proximity or contact of the external proximity object to detect the external proximity object. ### Claim 5 (depends on 1) The display device with a touch detection function according to claim 1, further comprising a plurality of common drive electrodes arranged in parallel so as to be extended in one direction, wherein the scan drive unit applies the display drive signal to the common drive electrodes in the display operation period and applies the touch drive signal to the common drive electrodes in the touch detection operation period. ### Claim 6 A drive method of a display device with a touch detection function including a plurality of display elements that perform a display operation based on a pixel signal and a display drive signal, and a touch detection element that detects an external proximity object in accordance with a touch drive signal, the drive method comprising: sequentially supplying the pixel signal and the display drive signal to the display elements in a time division manner to perform display scanning, in a display operation period; supplying the touch drive signal to the touch detection element, in a touch detection operation period different from the display operation period; performing touch detection by sampling a detection result of the touch detection element at a timing synchronized with the touch drive signal; detecting noise included in a frequency component sampled in the performing touch detection; and changing a frequency of the touch drive signal to be supplied to the touch detection element in the touch detection operation period, when the noise is detected in the detecting. ### Claim 7 An electronic apparatus including a display device with a touch detection function, the display device with a touch detection function comprising: a plurality of display elements that perform a display operation based on a pixel signal and a display drive signal; a touch detection element that detects an external proximity object in accordance with a touch drive signal; a scan drive unit that supplies the touch drive signal to the touch detection element in a touch detection operation period different from a display operation period in which the pixel signal and the display drive signal are sequentially supplied to the display elements in a time division manner to perform display scanning; a touch detection unit that performs touch detection by sampling a detection result of the touch detection element at a timing synchronized with the touch drive signal; and a noise detector that detects noise included in a frequency component sampled by the touch detection unit, wherein the scan drive unit changes a frequency of the touch drive signal in the touch detection operation period and supplies the changed frequency to the touch detection element, when the noise detector detects the noise.