# US 10,310,663 B2 · Display apparatus to mitigate touch detection drive signal interference

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- Number: US 10,310,663 B2
- Document ID: US10310663B2
- Status: Granted
- Kind: B2
- Application number: 15/683,389
- Filed: 2017-08-22
- Published: 2018-03-01
- Granted: 2019-06-04
- Earliest claimed: 2016-08-23
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Toshiaki Fukushima
- Web page: https://patentgrep.com/patent/US10310663B2

## CPC

- G02F 1/1343: Electrodes {(reflective electrodes G02F1/133553)}
- G02F 1/134309: {characterised by their geometrical arrangement}
- G02F 1/1345: Conductors connecting electrodes to cell terminals
- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- G06F 3/0412: {Digitisers structurally integrated in a display}
- 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 3/0445: {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}
- G02F 1/13338: {Input devices, e.g. touch panels}
- G02F 1/134345: {Subdivided pixels, e.g. for grey scale or redundancy}
- G02F 1/13456: {Cell terminals located on one side of the display only}
- G02F 1/136218: {Shield electrodes}
- G02F 2201/121: common or background
- G02F 2201/123: pixel
- G06F 3/047: using sets of wires, e.g. crossed wires
- G06F 2203/04107: Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
- 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)

## Abstract

According to an aspect, a display apparatus capable of preventing influence on a display by wires supplied with detection drive signals in a self-capacitive detection operation. The display apparatus includes: a plurality of gate lines; a plurality of first wires arranged in a frame region surrounding a display region and each configured to supply a detection drive signal to the respective gate lines in a detection operation period and be supplied with a first signal having a predetermined first voltage in a display operation period different from the detection operation period; and a shield that is a conductive member overlapping at least one of the first wires when viewed in a direction perpendicular to the display region and is supplied with a second signal having a predetermined second voltage in the display operation period.

## Claims

### Claim 1

A display apparatus comprising:
a plurality of gate lines;
a plurality of first wires arranged in a frame region surrounding a display region and each configured to supply a detection drive signal to the respective gate lines in a detection operation period and be supplied with a first signal having a predetermined first voltage in a display operation period different from the detection operation period; and
a shield that is a conductive member overlapping at least one of the first wires when viewed in a direction perpendicular to the display region and is supplied with a second signal having a predetermined second voltage in the display operation period.

### Claim 2 (depends on 1)

The display apparatus according to claim 1, further comprising:
a plurality of pixels arranged in the display region; and
a first switch arranged in each of the pixels and coupled to one of the gate lines, wherein
the second voltage is different from an on-voltage or an off-voltage of the first switch.

### Claim 3 (depends on 2)

The display apparatus according to claim 2, wherein the first voltage is the off-voltage of the first switch.

### Claim 4 (depends on 1)

The display apparatus according to claim 1, wherein the second voltage is different from the first voltage.

### Claim 5 (depends on 1)

The display apparatus according to claim 1, further comprising:
a plurality of pixel electrodes arranged in the display region; and
a common electrode facing the pixel electrodes, wherein
the second voltage is equal to a voltage applied to the common electrode in the display operation period.

### Claim 6 (depends on 1)

The display apparatus according to claim 1, wherein the second voltage is a ground potential.

### Claim 7 (depends on 1)

The display apparatus according to claim 1, wherein, in a period when the detection drive signal is supplied to each of the gate lines, a guard signal is supplied to the shield.

### Claim 8 (depends on 1)

The display apparatus according to claim 1, further comprising a metal member arranged on a surface of the shield.

### Claim 9 (depends on 8)

The display apparatus according to claim 8, wherein
the metal member is one of a plurality of metal members,
a longitudinal direction of each of the metal members is along a longitudinal direction of each of the first wires, and
the metal members are arranged side by side in a direction in which the first wires are arranged side by side.

### Claim 10 (depends on 1)

The display apparatus according to claim 1, wherein the shield overlaps all of the first wires when viewed in a direction perpendicular to the display region.

### Claim 11 (depends on 1)

The display apparatus according to claim 1, further comprising:
a plurality of second switches arranged in the frame region and coupled to the respective gate lines, wherein
each of the first wires is coupled to the respective gate lines through the respective second switches, and arranged between the second switches and the display region.