# US 2014/0192012 A1 · Display device with touch detection function, method for driving display device with touch detection function, 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 2014/0192012 A1 - Document ID: US20140192012A1 - Status: Published application - Kind: A1 - Application number: 14/108,896 - Filed: 2013-12-17 - Published: 2014-07-10 - Earliest claimed: 2013-01-08 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Hayato Kurasawa - Web page: https://patentgrep.com/patent/US20140192012A1 ## CPC - G06F 3/0412: {Digitisers structurally integrated in a display} - 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 According to an aspect, a display device with a touch detection function includes a drive electrode driver and a source selector unit. The drive electrode driver applies a touch driving signal to a drive electrode opposed only to a pixel electrode corresponding to a non-selection signal line in which the application of the pixel signal is not selected by the source selector unit, among pixel electrodes selected by one scanning signal by the gate driver. ## Claims ### Claim 1 A display device with a touch detection function comprising: a substrate; a plurality of pixel electrodes arranged in a matrix above a plane parallel to the substrate; a plurality of signal lines that extend above a plane parallel to a surface of the substrate and supply a pixel signal for displaying an image to the plurality of pixel electrodes; a display function layer that exerts an image display function based on the pixel signal; a plurality of drive electrodes that are opposed to the plurality of pixel electrodes in a vertical direction orthogonal to the surface of the substrate, and are arranged to be scanned in a direction different from a direction along which the plurality of signal lines extend; a plurality of touch detection electrodes that are opposed to the plurality of drive electrodes in the vertical direction and capacitively coupled with the plurality of drive electrodes; a gate driver that applies a scanning signal for selecting the plurality of pixel electrodes; a drive electrode driver that applies a touch driving signal for touch detection to the plurality of drive electrodes; a source driver that applies the pixel signal to the plurality of pixel electrodes; and a source selector unit that selects a signal line to which the source driver applies the pixel signal among the plurality of signal lines, wherein the drive electrode driver applies the touch driving signal to a drive electrode opposed only to a pixel electrode corresponding to a non-selection signal line in which the application of the pixel signal is not selected by the source selector unit, among pixel electrodes selected by one scanning signal by the gate driver. ### Claim 2 (depends on 1) The display device with a touch detection function according to claim 1, wherein in the drive electrode driver, a touch driving signal is not applied to a drive electrode opposed to a pixel electrode corresponding to a selection signal line in which the application of the pixel signal is selected by the source selector unit, among pixel electrodes selected by one scanning signal by the gate driver. ### Claim 3 (depends on 1) The display device with a touch detection function according to claim 1, wherein number of the drive electrodes scanned by the drive electrode driver is smaller than number of signal lines that is selectable by the source selector unit. ### Claim 4 (depends on 1) The display device with a touch detection function according to claim 1, wherein each of the plurality of drive electrode has a length equal to a width at which a pixel displayed by a pixel electrode corresponding to the selection signal line intersects at right angle with the direction along which the plurality of signal lines extend. ### Claim 5 (depends on 4) The display device with a touch detection function according to claim 4, wherein the pixel is a sub-pixel that performs monochrome color display, and the source selector unit sequentially selects a plurality of sub-pixels that display an image in combination with each other. ### Claim 6 (depends on 5) The display device with a touch detection function according to claim 5, wherein the drive electrode driver comprises a driving signal selector unit that selects a drive electrode for applying the touch driving signal, and the driving signal selector unit electrically couples the drive electrode for applying the touch driving signal and a sub-pixel that performs color display similar to that of a sub-pixel opposed to the drive electrode. ### Claim 7 (depends on 1) The display device with a touch detection function according to claim 1, wherein the drive electrode driver applies the touch driving signal to a drive electrode opposed to the pixel electrode before the source selector unit selects a signal line to be applied with the pixel signal, in a period in which a plurality of pixel electrodes are selected by one scanning signal by the gate driver. ### Claim 8 (depends on 7) The display device with a touch detection function according to claim 7, wherein the touch driving signal is not applied to a drive electrode opposed to a pixel electrode corresponding to a selection signal line in which the application of the pixel signal is selected by the source selector unit. ### Claim 9 (depends on 2) The display device with a touch detection function according to claim 2, wherein the drive electrode driver applies the touch driving signal to a signal line of a pixel electrode opposed, in the vertical direction, to the drive electrode to which the touch driving signal is applied. ### Claim 10 (depends on 2) The display device with a touch detection function according to claim 2, wherein the drive electrode driver applies a display driving signal for display to the plurality of drive electrodes, and performs control so that average potential of the display driving signal is equal to average potential of the touch driving signal. ### Claim 11 (depends on 1) The display device with a touch detection function according to claim 1, wherein the plurality of touch detection electrodes detect an external proximity object approaching from the outside based on a change in capacitance caused by proximity or contact of the external proximity object. ### Claim 12 (depends on 1) The display device with a touch detection function according to claim 1, wherein the driving signal selector unit and the source selector unit are arranged to sandwich both ends in an extending direction of the plurality of drive electrodes when the substrate is viewed in the vertical direction. ### Claim 13 (depends on 1) The display device with a touch detection function according to claim 1, wherein the plurality of drive electrodes extend in a direction parallel to a direction along which the plurality of signal lines extend, and the plurality of touch detection electrodes extend in a direction different from a direction along which the plurality of signal lines extend. ### Claim 14 A method for driving a display device with a touch detection function, the method comprising: in a period in which a plurality of pixel electrodes are selected by one scanning signal by a gate driver, applying a display driving signal for display to a drive electrode when an application of a pixel signal to a signal line is selected by a source selector unit; applying a touch driving signal for touch detection to the drive electrode when application of the pixel signal to the signal line is not selected by the source selector unit; and outputting a touch detection signal corresponding to an external proximity object approaching from the outside from a plurality of touch detection electrodes three-dimensionally crossing the plurality of drive electrodes and forming capacitance at the three-dimensionally crossing portion. ### Claim 15 An electronic apparatus having a display device with a touch detection function capable of detecting an external proximity object, the display device with a touch detection function comprising: a substrate; a plurality of pixel electrodes arranged in a matrix above a plane parallel to the substrate; a plurality of signal lines that extend above a plane parallel to a surface of the substrate and supply a pixel signal for displaying an image to the plurality of pixel electrodes; a display function layer that exerts an image display function based on the pixel signal; a plurality of drive electrodes that are opposed to the plurality of pixel electrodes in a vertical direction orthogonal to the surface of the substrate, and are arranged to be scanned in a direction different from a direction along which the plurality of signal line extend; a plurality of touch detection electrodes that are opposed to the drive electrodes in the vertical direction and capacitively coupled with the plurality of drive electrodes; a gate driver that applies a scanning signal for selecting the plurality of pixel electrodes; a drive electrode driver that applies a touch driving signal for touch detection to the plurality of drive electrodes; a source driver that applies the pixel signal to the plurality of pixel electrodes; and a source selector unit that selects a signal line to which the source driver applies the pixel signal among the plurality of signal lines, wherein the drive electrode driver applies the touch driving signal to a drive electrode opposed only to a pixel electrode corresponding to a non-selection signal line in which the application of the pixel signal is not selected by the source selector unit, among pixel electrodes selected by one scanning signal by the gate driver.