Substrate and sensing method thereof, touch panel and display device

Patent metadata

Field	Value
Publication number	US-2021365166-A1
Application number	US-201816333631-A
Country	US
Kind code	A1
Filing date	Jul 4, 2018
Priority date	Sep 14, 2017
Publication date	Nov 25, 2021
Grant date	—

Abstract

The disclosure provides a substrate and a sensing method thereof, a touch panel and a display device. The substrate comprises at least two sensing layers, wherein any two of the at least two sensing layers are a first sensing layer and a second sensing layer, respectively; and, the first sensing layer comprises an array of first sensing units, and the second sensing layer comprises an array of second sensing units, any one of the first sensing units within a sensing region is overlapped with more than one of the second sensing units, and any one of the second sensing units within the sensing region is overlapped with more than one of the first sensing units.

First claim

What is claimed is:

1 . A substrate, comprising at least two sensing layers, each of which comprises an array of sensing units, the substrate further comprising a sensing region, wherein at least one portion of each of the sensing layers is in the sensing region, any two of the at least two sensing layers are a first sensing layer and a second sensing layer, respectively,
wherein the first sensing layer comprises an array of first sensing units, the second sensing layer comprises an array of second sensing units, any one of the first sensing units within the sensing region is overlapped with more than one of the second sensing units, and any one of the second sensing units within the sensing region is overlapped with more than one of the first sensing units.

2 . The substrate according to claim 1 , wherein the array of sensing units included in each of the at least two sensing layers are identical in at least one of the following aspects:
the shape of each sensing unit, the size of each sensing unit, the central distance between two adjacent sensing units, and the arrangement mode of sensing units.

3 . The substrate according to claim 2 , wherein the array of sensing units included in each of the at least two sensing layers are identical in the shape of each sensing unit, the size of each sensing unit, the central distance between two adjacent sensing units and the arrangement mode of sensing units.

4 . The substrate according to claim 1 , wherein the sensing layer comprises a sensing material layer, a first electrode layer and a second electrode layer, the first electrode layer and the second layer are on two side surfaces of the sensing material layer, respectively, and at least one of the first electrode layer and the second electrode layer has a pattern corresponding to the array of sensing units included in the sensing layer in which the electrode layer is.

5 . The substrate according to claim 4 , comprising at least four sensing layers, wherein the at least four sensing layers comprise at least one group of a third sensing layer and a fourth sensing layer that share the same second electrode layer,
the first electrode layer in the third sensing layer has a pattern corresponding to an array of sensing units included in the third sensing layer, the first electrode layer in the fourth sensing layer has a pattern corresponding to an array of sensing units included in the fourth sensing layer, and the second electrode layer shared by the third sensing layer and the fourth sensing layer covers the sensing region.

6 . The substrate according to claim 1 , further comprising at least one insulating material layer, each of which is between two of the sensing layers adjacent to each other in a thickness direction of the substrate.

7 . The substrate according to claim 4 , wherein a material forming the sensing material layer comprises at least one of a piezoelectric material, a piezoresistive material and a photosensitive semiconductor material.

8 . A touch panel, comprising a substrate, wherein the substrate comprises at least two sensing layers, each of which comprises an array of sensing units, the substrate further comprises a sensing region, at least one portion of each of the sensing layers is in the sensing region, any two of the at least two sensing layers are a first sensing layer and a second sensing layer, respectively, wherein the first sensing layer comprises an array of first sensing units, the second sensing layer comprises an array of second sensing units, any one of the first sensing units within the sensing region is overlapped with more than one of the second sensing units, and any one of the second sensing units within the sensing region is overlapped with more than one of the first sensing units.

9 . A display device, comprising the substrate according to claim 1 .

10 . A sensing method applied to a substrate, wherein the substrate comprises at least two sensing layers, each of which comprises an array of sensing units, the substrate further comprises a sensing region, at least one portion of each of the sensing layers is in the sensing region, any two of the at least two sensing layers are a first sensing layer and a second sensing layer, respectively, wherein the first sensing layer comprises an array of first sensing units, the second sensing layer comprises an array of second sensing units, any one of the first sensing units within the sensing region is overlapped with more than one of the second sensing units, and any one of the second sensing units within the sensing region is overlapped with more than one of the first sensing units, the method comprising:
acquiring sensing signals respectively corresponding to each of the sensing layers; and integrating the sensing signals respectively corresponding to each of the sensing layers to obtain a sensing result corresponding to coordinates of each location in the sensing region; wherein the minimum location distance of the coordinates of the location is less than the central distance between two adjacent sensing units in any array of the sensing units.

11 . The method according to claim 10 , wherein the substrate is used for realizing pressure sensing in a pressure touch, and the sensing signal comprises any one of a signal indicating whether a sensing unit is subjected to pressure and a signal indicating the value of pressure to which a sensing unit is subjected.

12 . The substrate according to claim 3 , wherein the at least two sensing layers are arranged in parallel in at least one direction, wherein any direction of the at least one direction is an arrangement direction of a sensing unit in one of the sensing layers, an interval between the at least two sensing layers in the any direction is d/N, the d is a central distance between two adjacent sensing units in the any direction in the sensing layer, and N is the number of the sensing layers.

13 . The substrate according to claim 1 , wherein the first sensing layer has a plurality of intersection areas having a congruent shape, and each of the intersection areas is an area with a minimum size enclosed by orthographic projections of a boundary of the array of first sensing units and boundaries of the arrays of sensing units in other sensing layers on the first sensing layer.

14 . The substrate according to claim 1 , wherein the array of sensing units included in each of the at least two sensing layers are identical in the shape of each sensing unit, the size of each sensing unit, the central distance between two adjacent sensing units and the arrangement mode of sensing units;
the at least two sensing layers are arranged in parallel in at least one direction, wherein any direction of the at least one direction is an arrangement direction of a sensing unit in one of the sensing layers, an interval between the at least two sensing layers in the any direction is d/N, the d is a central distance between two adjacent sensing units in the any direction in the sensing layer, and N is the number of the sensing layers; the sensing layer comprises a sensing material layer, a first electrode layer and a second electrode layer, the first electrode layer and the second layer are on two side surfaces of the sensing material layer, respectively, and at least one of the first electrode layer and the second electrode layer has a pattern corresponding to the array of sensing units included in the sensing layer in which the electrode layer is; the substrate comprises at least four sensing layers, wherein the at least four sensing layers comprise at least one group of a third sensing layer and a fourth sensing l

Assignees

• Boe Technology Group Co Ltd

Inventors

• Zhang Ping
• Dong Xue
• Lv Jing
• Wang Haisheng
• Ding Xiaoliang
• Liu Wei
• Cao Xueyou
• Wang Pengpeng
• Han Yanling
• Cheng Chihjen
• Gu Pinchao
• Qin Yunke
• Guo Yuzhen

Classifications

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F3/0416 Primary

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F2203/04105

  Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position · CPC title

• G06F3/0414 Primary

  using force sensing means to determine a position · CPC title

• G06F3/04144 Primary

  using an array of force sensing means (position sensing using the local deformation of sensor cells G06F3/0447) · CPC title