# US 10,871,857 B2 · Touch panel being able to realize force touch and touch detection method thereof and display device

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- Number: US 10,871,857 B2
- Document ID: US10871857B2
- Status: Granted
- Kind: B2
- Application number: 15/761,248
- Filed: 2017-06-27
- Published: 2020-07-30
- Granted: 2020-12-22
- Earliest claimed: 2016-09-26
- Assignees: Boe Technology Group Co., Ltd.; Beijing Boe Display Technology Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.; Beijing Boe Display Technology Co., Ltd.
- Inventors: Kan Zhang; Weitao Chen; Bin Zhang; Pengming Chen; Guangxing Wang; Qiang Zhang; Dianzheng Dong
- Web page: https://patentgrep.com/patent/US10871857B2

## CPC

- G06F 3/0428: {by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual (sensing beam interruptions in a planar beam grid of an optical touch-screen G06F3/0421)}
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/0414: {using force sensing means to determine a position}
- G06F 3/0421: {by interrupting or reflecting a light beam, e.g. optical touch-screen}
- G06F 3/0443: {using a single layer of sensing electrodes}
- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G06F 2203/04107: Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A touch panel, a display device and a touch detection method are provided. The touch panel includes a base substrate, a plurality of transmitter groups and a receiver. The base substrate has a touch surface configured to receive a touch operation, each of the plurality of transmitter groups includes a plurality of transmitters. The transmitters are configured to emit light, the receiver is configured to receive light emitted by the transmitters. the base substrate is configured to produces a deformation upon receiving the touch operation, the light received by the receiver corresponds to the deformation.

## Claims

### Claim 1

A touch panel, comprising:
a base substrate, having a touch surface which is configured to receive a touch operation;
a plurality of transmitter groups, each of the plurality of transmitter groups comprises a plurality of transmitters, the transmitters are configured to emit light; and
a receiver, configured to receive light emitted by the transmitters,
wherein the base substrate is configured to produces a deformation upon receiving the touch operation, the light received by the receiver corresponds to the deformation,
the touch panel further comprises a light shield layer, the light shield layer is disposed between the base substrate and the transmitter groups, the light shield layer is configured to prevent light from the touch surface which has a wavelength the same as that of the light emitted by the plurality of transmitters from entering the receiver,
the light shield layer is a photonic crystal layer.

### Claim 2 (depends on 1)

The touch panel according to claim 1, wherein the receiver comprises a plurality of sub-receivers, different sub-receivers receive the light emitted by different transmitters in each of the transmitter groups.

### Claim 3 (depends on 1)

The touch panel according to claim 1, further comprising:
a plurality of photonic crystal protrusions, disposed at intervals on a side of the photonic crystal layer away from the touch surface.

### Claim 4 (depends on 1)

The touch panel according to claim 1, wherein the photonic crystal layer has a bandgap range of 780 nm-2500 nm.

### Claim 5 (depends on 1)

The touch panel according to claim 1, wherein the transmitters are configured to emit infrared light.

### Claim 6 (depends on 1)

The touch panel according to claim 1, wherein the plurality of transmitter groups comprise row transmitter groups arranged in a first direction and column transmitter groups arranged in a second direction, the first direction is perpendicular to the second direction.

### Claim 7 (depends on 1)

The touch panel according to claim 1, further comprising a plurality of self-capacitance electrodes arranged in a matrix and disposed on the base substrate.

### Claim 8 (depends on 1)

The touch panel according to claim 1, further comprising a plurality of touch driving electrodes and a plurality of touch sensing electrodes which are disposed on the base substrate.

### Claim 9 (depends on 1)

The touch panel according to claim 1, wherein the receiver further comprises a photoelectric conversion element.

### Claim 10 (depends on 1)

A display device, comprising the touch panel according claim 1, and a display panel.

### Claim 11

A touch detection method for a touch panel, wherein the touch panel comprises a base substrate, having a touch surface which is configured to receive a touch operation; a plurality of transmitter groups, each of the plurality of transmitter groups comprises a plurality of transmitters, the transmitters are configured to emit light; and a receiver, configured to receive light emitted by the transmitters, the base substrate is configured to produces a deformation upon receiving the touch operation, the light received by the receiver corresponds to the deformation, the touch panel further comprises a light shield layer, the light shield layer is disposed between the base substrate and the transmitter groups, the light shield layer is configured to prevent light from the touch surface which has a wavelength the same as that of the light emitted by the plurality of transmitters from entering the receiver, the light shield layer is a photonic crystal layer, the touch detection method comprises:
using the plurality of transmitters to emit the light parallel to the touch surface, and making the light enter the receiver disposed corresponding thereto; and
detecting whether the receiver receives the light to judge whether a touch operation occurs.

### Claim 12 (depends on 11)

The touch detection method according to claim 11, further comprising:
detecting light intensity received by the receiver to judge a magnitude of pressure of the touch operation.

### Claim 13 (depends on 11)

The touch detection method according to claim 11, wherein the receiver comprises a plurality of sub-receivers, the light emitted by different transmitters in each of the transmitter groups is received by different sub-receivers, the method further comprising:
detecting a number of the sub-receivers that receive the light in the plurality of sub-receivers disposed in one-to-one correspondence with the plurality of transmitters in a same transmitter group to judge the magnitude of the pressure of the touch operation.

### Claim 14 (depends on 11)

The touch detection method according to claim 11, wherein the receiver comprises a photoelectric conversion element, the method further comprising:
using the photoelectric conversion element in the receiver to convert the light received by the receiver to an induction current;
amplifying the induction current; and
detecting a magnitude of the induction current after amplifying to judge whether the receiver receives the light and the light intensity that is received.

### Claim 15 (depends on 12)

The touch detection method according to claim 12, further comprising:
generating different touch commands according to the magnitude of the pressure of the touch operation.

### Claim 16 (depends on 1)

The touch panel according to claim 1, wherein the transmitter groups are disposed on a side of the base substrate away from the touch surface, and the plurality of transmitters in each of the transmitter groups are arranged in a direction perpendicular to the touch surface.

### Claim 17 (depends on 1)

The touch panel according to claim 1, wherein the base substrate is flexible.