# US 12,008,185 B2 · Input/output panel, input/output device, and semiconductor device

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- Number: US 12,008,185 B2
- Document ID: US12008185B2
- Status: Granted
- Kind: B2
- Application number: 18/312,104
- Filed: 2023-05-04
- Published: 2023-08-31
- Granted: 2024-06-11
- Earliest claimed: 2016-07-13
- Assignees: Semiconductor Energy Laboratory Co., Ltd.
- Applicants: Semiconductor Energy Laboratory Co., Ltd.
- Inventors: Hajime Kimura; Shunpei Yamazaki
- Web page: https://patentgrep.com/patent/US12008185B2

## CPC

- G06F 3/0412: {Digitisers structurally integrated in a display}
- G02F 1/13338: {Input devices, e.g. touch panels}
- G02F 1/134363: {for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]}
- G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)}
- 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 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)}
- G02F 2201/44: Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers
- 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)
- 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

## Abstract

An input/output device includes a first sensor electrode and a second sensor electrode. In addition, the input/output device includes a first electrode and a second electrode which are electrodes for a display element, and a substrate sandwiched between the first sensor electrode and the second sensor electrode. The second sensor electrode is formed concurrently with the first electrode using the same material. The input/output device sensors a change in capacitance of a capacitor formed between the first sensor electrode and the second sensor electrode. Furthermore, a third sensor electrode to which a floating potential is applied may be provided to overlap with the first electrode. In the input/output device, either a liquid crystal element or a light-emitting element may be used, or both the liquid crystal element and the light-emitting element may be used.

## Claims

### Claim 1

An input/output device comprising:
a touch sensor, the touch sensor comprising:
a first electrode over a substrate; and
a second electrode under the substrate;
a light-emitting element under the substrate, the light-emitting element comprising:
a third electrode;
a fourth electrode; and
a layer containing a light-emitting material; and
an insulating layer between the substrate and the fourth electrode,
wherein a capacitor is formed between the first electrode and the second electrode,
wherein the insulating layer is in contact with a surface of the fourth electrode and a surface of the second electrode,
wherein the third electrode is a pixel electrode,
wherein the second electrode comprises a same material as the fourth electrode,
wherein the second electrode is isolated from the fourth electrode,
wherein the second electrode is on a same layer as the fourth electrode, and
wherein a part of the third electrode overlaps with a part of the second electrode.

### Claim 2 (depends on 1)

The input/output device according to claim 1, wherein the fourth electrode comprises any one of indium oxide, indium tin oxide, indium zinc oxide, zinc oxide, and zinc oxide to which gallium is added.

### Claim 3 (depends on 1)

The input/output device according to claim 1, wherein the third electrode comprises a light-transmitting material.

### Claim 4 (depends on 1)

The input/output device according to claim 1, wherein the second electrode is sandwiched between the substrate and the third electrode.

### Claim 5 (depends on 1)

The input/output device according to claim 1, wherein the third electrode is sandwiched between the substrate and the second electrode.