# US 2019/0171319 A1 · Display device with built-in touch sensor, and drive method thereof

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- Number: US 2019/0171319 A1
- Document ID: US20190171319A1
- Status: Published application
- Kind: A1
- Application number: 16/185,029
- Filed: 2018-11-09
- Published: 2019-06-06
- Earliest claimed: 2017-12-01
- Assignees: Sharp Kabushiki Kaisha
- Applicants: Sharp Kabushiki Kaisha
- Inventors: Atsushi AOKI; Daiji KITAGAWA; Yousuke NAKAMURA; Teruhisa MASUI; Masashi MAYUMI; Kunihiko YAMAMOTO
- Web page: https://patentgrep.com/patent/US20190171319A1

## CPC

- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/04164: {Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads}
- G06F 3/041661: {using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window}
- G06F 3/044: by capacitive means
- G06F 3/0443: {using a single layer of sensing electrodes}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A display device, with a built-in touch sensor, including a display unit where sensor electrodes are provided, and a signal processing unit configured to process detection signals obtained from the sensor electrodes is provided with a segment-size switching unit configured to perform electrical connection and electrical disconnection of sensor electrodes such that a size of a segment serving as a unit of processing the detection signal becomes a size depending on an instruction signal. For example, the segment-size switching unit is configured by a switch circuit configured to switch a connection relationship between a plurality of sensor electrodes and a plurality of analog front ends, and a switching control unit configured to control operation of the switch circuit depending on the instruction signal.

## Claims

### Claim 1

A display device, with a built-in touch sensor, including a display unit where K sensor electrodes for touch detection are arranged in a matrix, where K is an integer of four or more, and a signal processing unit configured to process detection signals obtained from the K sensor electrodes, the display device comprising:
a segment-size switching unit configured to perform electrical connection and electrical disconnection of sensor electrodes such that a size of a segment made up of one or J sensor electrodes becomes a size depending on an instruction signal, where J is an integer of 2 or more and K or less, the segment serving as a unit of processing the detection signals; and
a position detection processing unit configured to identify a touch position based on an output from the signal processing unit.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein the segment-size switching unit dynamically switches the size of the segment.

### Claim 3 (depends on 2)

The display device according to claim 2, wherein the segment-size switching unit switches the size of the segment depending on use intended by a user.

### Claim 4 (depends on 1)

The display device according to claim 1, wherein the segment-size switching unit switches the size of the segment between a plurality of sizes prepared in advance, in a time-divided manner.

### Claim 5 (depends on 1)

The display device according to claim 1, wherein
the signal processing unit includes a plurality of analog front ends, and
the segment-size switching unit includes
a switching circuit unit configured to switch a connection relationship between the K sensor electrodes and the plurality of analog front ends, and
a switching control unit configured to control operation of the switching circuit unit depending on the instruction signal.

### Claim 6 (depends on 1)

The display device according to claim 1, wherein a segment electrically connecting a plurality of sensor electrodes that are arranged along an edge portion of the display unit is provided.

### Claim 7 (depends on 1)

The display device according to claim 1, wherein
the display unit includes a pixel electrode for applying a voltage depending on a display image, and a common electrode provided facing the pixel electrode, and
the K sensor electrodes are used in a shared manner as the common electrode.

### Claim 8

A drive method of a display device, with a built-in touch sensor, including a display unit where K sensor electrodes for touch detection are arranged in a matrix, where K is an integer of four or more, and a signal processing unit configured to process detection signals obtained from the K sensor electrodes, the drive method comprising:
a segment-size switching step of performing electrical connection and electrical disconnection of sensor electrodes such that a size of a segment made up of one or J sensor electrodes becomes a size depending on an instruction signal, where J is an integer of 2 or more and K or less, the segment serving as a unit of processing the detection signals; and
a position detection step of identifying a touch position based on an output from the signal processing unit.