# US 10,310,684 B2 · Touch sensor and display apparatus

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- Number: US 10,310,684 B2
- Document ID: US10310684B2
- Status: Granted
- Kind: B2
- Application number: 15/269,932
- Filed: 2016-09-19
- Published: 2017-07-20
- Granted: 2019-06-04
- Earliest claimed: 2009-06-30
- Assignees: Japan Display Inc.
- Applicants: Japan Display, Inc.
- Inventors: Koji Ishizaki; Kouji Noguchi; Tsutomu Harada; Takeya Takeuchi; Yoshitoshi Kida; Takayuki Nakanishi
- Web page: https://patentgrep.com/patent/US10310684B2

## CPC

- G02F 1/13338: {Input devices, e.g. touch panels}
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/0416: {Control or interface arrangements specially adapted for digitisers}
- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G09G 3/3611: {Control of matrices with row and column drivers}
- G06F 2203/04101: 2.5D-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 and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
- 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
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- 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 touch sensor that may detect an object away from the sensor is provided. The touch sensor includes one or more drive electrodes; one or more detection electrodes forming capacitance in cooperation with the respective drive electrodes; a detection circuit applying drive signals to the respective drive electrodes to detect the object based on detection signals obtained from the respective detection electrodes in response to the respective drive signals; and a controller controlling to change a range of electric flux lines generated between the drive electrodes and the detection electrodes.

## Claims

### Claim 1

A touch sensor comprising:
one or more electrodes having capacitance, the electrodes including a plurality of common electrodes, and the electrodes having selectable electrode patterns;
a detection circuit configured to apply drive signals to at least one of the electrodes and to detect an object based on detection signals obtained from the electrodes in response to the drive signals: and
a controller configured to control operation modes of the touch sensor in accordance with a detection result by the detection circuit and to select the electrode patterns in accordance with the operation modes,
wherein the operation modes include a long-distance detection mode and a position detection mode,
the detection circuit detects the object being distant from the touch sensor in the long-distance detection mode,
the detection circuit detects a position coordinate of the object that contacts or approaches the touch sensor in the position detection mode, and
in the long-distance detection mode, the controller causes a pixel voltage of pixel electrodes to be higher than an off voltage of a gate of a TFT, after applying the drive signals to the common electrodes.

### Claim 2 (depends on 1)

The touch sensor according to claim 1, wherein the controller increases the number of the electrode patterns in the long-distance detection mode, and the controller decreases the number of the electrode patterns in the position detection mode.