# US 11,906,834 B2 · Touch panel with different density of electrodes in the edge area and display device

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- Number: US 11,906,834 B2
- Document ID: US11906834B2
- Status: Granted
- Kind: B2
- Application number: 16/962,520
- Filed: 2020-05-20
- Published: 2023-04-13
- Granted: 2024-02-20
- Earliest claimed: 2020-05-09
- Assignees: Huizhou China Star Optoelectronics Technology Co., Ltd.
- Applicants: Huizhou China Star Optoelectronics Technology Co., Ltd.
- Inventors: Dongchen Huang; Chingyuan Cheng
- Web page: https://patentgrep.com/patent/US11906834B2

## CPC

- G02F 1/13338: {Input devices, e.g. touch panels}
- 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 2203/04111: Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
- 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

A touch panel and a display device are disclosed. The touch panel includes a first area and a second area, and further includes: a plurality of first electrodes located in the first area and a plurality of second electrodes located in the second area. An arrangement density of the first electrodes is greater than an arrangement density of the plurality of second electrodes.

## Claims

### Claim 1

A touch panel, wherein the touch panel comprises a first area including a central area of the touch panel and a second area surrounding the first area, and further comprises touch electrodes for touch detection, and the touch electrodes comprises:
a plurality of first electrodes, wherein the plurality of first electrodes are located in the first area, and the plurality of first electrodes are arranged in parallel; and
a plurality of second electrodes, wherein the plurality of second electrodes are located in the second area, the plurality of second electrodes are arranged in parallel, an arrangement density of the plurality of first electrodes is greater than an arrangement density of the plurality of second electrodes, each of the plurality of first electrodes and each of the plurality of second electrodes have the same size, a first gap is provided between the two adjacent first electrodes of the plurality of first electrodes, a second gap is provided between the two adjacent second electrodes of the plurality of second electrodes, and a width of the first gap is smaller than a width of the second gap,
wherein a width of the second gap away from the first area is larger than a width of the second gap close to the first area, a width of the first gap close to the second area is larger than a width of the first gap away from the second area, or each of the first gaps has the same width,
wherein the touch electrodes further comprises a plurality of third electrodes, the plurality of third electrodes are located in the first area, the plurality of third electrodes intersect with the plurality of first electrodes, and the plurality of third electrodes are insulated from the plurality of first electrodes, and
wherein an arrangement density of the plurality of third electrodes is equal to the arrangement density of the plurality of first electrodes.

### Claim 2 (depends on 1)

The touch panel of claim 1, wherein the plurality of third electrodes and the plurality of first electrodes are disposed in the same layer, or the plurality of third electrodes and the plurality of first electrodes are disposed in different layers.

### Claim 3 (depends on 1)

The touch panel of claim 1, wherein each of the second gaps has the same width.

### Claim 4

A display device, wherein the display device comprises a color filter substrate, a polarizer, a cover plate, and a touch panel;
wherein the polarizer is provided between the color filter substrate and the cover plate; and
the touch panel is disposed on a side of the polarizer close to the cover plate, the touch panel is disposed between the polarizer and the color filter substrate, or the touch panel is disposed on a side of the color filter substrate away from the polarizer, wherein the touch panel includes a first area including a central area of the touch panel and a second area surrounding the first area, and the touch panel further includes touch electrodes for touch detection, and the touch electrodes comprises:
a plurality of first electrodes, wherein the plurality of first electrodes are located in the first area, and the plurality of first electrodes are arranged in parallel; and
a plurality of second electrodes, wherein the plurality of second electrodes are located in the second area, the plurality of second electrodes are arranged in parallel, an arrangement density of the plurality of first electrodes is greater than an arrangement density of the plurality of second electrodes, each of the plurality of first electrodes and each of the plurality of second electrodes have the same size, a first gap is provided between the two adjacent first electrodes of the plurality of first electrodes, a second gap is provided between the two adjacent second electrodes of the plurality of second electrodes, and a width of the first ap is smaller than a width of the second gap,
wherein a width of the second gap away from the first area is larger than a width of the second gap close to the first area, a width of the first gap close to the second area is larger than a width of the first gap away from the second area, or each of the first gaps has the same width,
wherein the touch electrodes further comprises a plurality of third electrodes, the plurality of third electrodes are located in the first area, the plurality of third electrodes intersect with the plurality of first electrodes, and the plurality of third electrodes are insulated from the plurality of first electrodes, and
wherein an arrangement density of the plurality of third electrodes is equal to the arrangement density of the plurality of first electrodes.