# US 11,309,366 B2 · Resistive touch screen, organic light emitting diode display, and manufacturing method thereof

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,309,366 B2
- Document ID: US11309366B2
- Status: Granted
- Kind: B2
- Application number: 16/468,010
- Filed: 2019-02-25
- Published: 2021-07-22
- Granted: 2022-04-19
- Earliest claimed: 2018-12-19
- Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Inventors: Wangming Li
- Web page: https://patentgrep.com/patent/US11309366B2

## CPC

- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/045: using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
- G06F 3/047: using sets of wires, e.g. crossed wires
- H10K 59/40: OLEDs integrated with touch screens
- H10K 71/13: using printing techniques, e.g. ink-jet printing or screen printing
- H10K 71/16: using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering
- H10K 71/40: Thermal treatment, e.g. annealing in the presence of a solvent vapour
- G06F 2203/04102: Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A resistive touch screen includes: a cover plate; conductive traces formed on the cover plate; a carbon resistance layer printed on the cover plate between the conductive traces, wherein the conductive traces are electrically connected to the carbon resistance layer to form an inductive resistive layer, and a resistance value can be changed by external pressure to achieve touch control.

## Claims

### Claim 1

A resistive touch screen, comprising:
a cover plate;
a plurality of conductive traces formed on the cover plate; and
a carbon resistance layer printed on the cover plate at spaces confined between the conductive traces,
wherein the conductive traces are electrically connected to the carbon resistance layer to form an inductive resistive layer.

### Claim 2 (depends on 1)

The resistive touch screen of claim 1, further comprising a resistive region disposed on the cover plate between the conductive traces, and the carbon resistance layer is printed in the resistive region.

### Claim 3 (depends on 1)

The resistive touch screen of claim 1, wherein material of the carbon resistance layer is fullerene, and the cover plate is a flexible cover plate.

### Claim 4

An organic light emitting diode (OLED) display, comprising an OLED display panel and a resistive touch screen, wherein the resistive touch screen is attached to the OLED display panel, and the resistive touch screen comprises:
a cover plate;
a plurality of conductive traces formed on the cover plate; and
a carbon resistance layer printed on the cover plate at spaces confined between the conductive traces,
wherein the conductive traces are electrically connected to the carbon resistance layer to form an inductive resistive layer.

### Claim 5 (depends on 4)

The OLED display of claim 4, further comprising a resistive region disposed on the cover plate between the conductive traces, and the carbon resistance layer is printed in the resistive region.

### Claim 6 (depends on 4)

The OLED display of claim 4, wherein material of the carbon resistance layer is fullerene, and the cover plate is a flexible cover plate.

### Claim 7

A method for manufacturing a resistive touch screen, comprising:
providing a cover plate;
forming a plurality of conductive traces on the cover plate; and
printing a carbon resistance layer on the cover plate at spaces confined between the conductive traces, such that the conductive traces are electrically connected to the carbon resistance layer to form an inductive resistive layer.

### Claim 8 (depends on 7)

The method of manufacturing the resistive touch screen of claim 7, wherein forming the conductive traces on the cover plate comprises:
depositing an indium tin oxide (ITO) layer on the cover plate using a magnetron sputtering process; and
etching the conductive traces out of the ITO layer using a laser etching process.

### Claim 9 (depends on 7)

The method of manufacturing the resistive touch screen of claim 7, wherein printing the carbon resistance layer on the cover plate between the conductive traces comprises:
providing a resistive region on the cover plate between the conductive traces; and
printing the carbon resistance layer on the resistive region.

### Claim 10 (depends on 9)

The method of manufacturing the resistive touch panel of claim 9, wherein printing the carbon resistance layer on the resistive region comprises:
printing the carbon resistance layer on the resistive region using a surface-mount technology (SMT) printing process.

### Claim 11 (depends on 7)

The method of manufacturing the resistive touch screen of claim 7, before forming the conductive traces on the cover plate, the method further comprising:
performing plasma cleaning to the cover plate to remove foreign matter on a surface of the cover plate, such that a water contact angle on the surface of the cover plate reaches a printing requirement of the carbon resistance layer; and
after printing the carbon resistance layer on the cover plate between the conductive traces, the method further comprising:
baking the carbon resistance layer to cure the carbon resistance layer.

### Claim 12 (depends on 7)

The method of manufacturing the resistive touch screen of claim 7, wherein material of the carbon resistance layer is fullerene, and the cover plate is a flexible cover plate.