Touch panel and driving method thereof, display device

Patent metadata

Field	Value
Publication number	US-2023072548-A1
Application number	US-202117787732-A
Country	US
Kind code	A1
Filing date	May 17, 2021
Priority date	Jun 3, 2020
Publication date	Mar 9, 2023
Grant date	—

Abstract

A touch panel and a driving method thereof, and a display device are provided. The touch panel includes a first substrate and a second substrate; the first substrate includes a first electrode pattern layer, and the first electrode pattern layer includes first electrode blocks insulated from each other; the second substrate includes a second electrode pattern layer, touch lead lines, and a third electrode pattern layer; the second electrode pattern layer includes second electrode blocks insulated from each other; the second electrode blocks correspond to and are electrically connected with the first electrode blocks, respectively, and the second electrode blocks are respectively electrically connected with the touch lead lines to process an electrical signal of a touch operation; and the third electrode pattern layer includes third electrode blocks insulated from each other, and the second electrode blocks are insulated from the third electrode blocks to form touch capacitors, respectively.

First claim

1 . A touch panel, comprising:
a first substrate; and a second substrate, being opposite to the first substrate and overlapping with the first substrate, wherein the first substrate comprises a first electrode pattern layer, the first electrode pattern layer comprises a plurality of first electrode blocks, and the plurality of first electrode blocks are insulated from each other and arranged in a first array with a plurality of rows and a plurality of columns; and the second substrate comprises:
a second electrode pattern layer, comprising a plurality of second electrode blocks, wherein the plurality of second electrode blocks are insulated from each other and arranged in a second array with a plurality of rows and a plurality of columns;
a plurality of touch lead lines, wherein the plurality of second electrode blocks correspond to and are electrically connected with the plurality of first electrode blocks, respectively, and the plurality of second electrode blocks are respectively electrically connected with the plurality of touch lead lines to process an electrical signal of a touch operation; and
a third electrode pattern layer, comprising a plurality of third electrode blocks, wherein the plurality of third electrode blocks are insulated from each other and arranged in a third array with a plurality of rows and a plurality of columns, and the plurality of second electrode blocks are insulated from the plurality of third electrode blocks to form a plurality of touch capacitors, respectively.

2 . The touch panel according to claim 1 , wherein the plurality of second electrode blocks and the plurality of first electrode blocks correspond to each other, and the plurality of second electrode blocks are electrically connected with the plurality of first electrode blocks in one-to-one correspondence.

3 . The touch panel according to claim 1 , wherein the second electrode pattern layer and the third electrode pattern layer are in different layers on the second substrate; and
in a direction in which the first substrate and the second substrate are opposite to each other, each of the plurality of second electrode blocks at least partially overlaps with at least one third electrode block to form a touch capacitor.

4 . The touch panel according to claim 1 , wherein the first electrode pattern layer is on a side of the first substrate close to the second substrate, and the second electrode pattern layer and the third electrode pattern layer are on a side of the second substrate close to the first substrate.

5 . The touch panel according to claim 1 , wherein the second substrate is a display array substrate, the first substrate is an opposite substrate, and the first substrate and the second substrate further work together to provide a display function;
the second substrate further comprises a plurality of display sub-pixels arranged in an array, and each of the plurality of display sub-pixels comprises a pixel electrode and a switch component electrically connected with the pixel electrode; and each of the plurality of third electrode blocks is further used as a pixel electrode of one display sub-pixel, and the plurality of touch lead lines further transmit a first common voltage signal for a display operation.

6 . The touch panel according to claim 5 , wherein the pixel electrode is on a side of the second electrode block close to the first substrate, and the switch component is on a side of the second electrode block away from the first substrate; and
the second electrode block comprises an opening, and the pixel electrode is electrically connected to the switch component through the opening.

7 . The touch panel according to claim 5 , wherein the switch component comprises an active layer, a first electrode electrically connected to a first electrode region of the active layer, and a second electrode electrically connected to a second electrode region of the active layer,
the first electrode is connected to the pixel electrode through a via hole, and an orthographic projection of the second electrode on the first substrate or the second substrate at least partially overlaps with an orthographic projection of one second electrode block on the first substrate or the second substrate.

8 . The touch panel according to claim 5 , further comprising a controller,
wherein the controller is configured to, respectively through the plurality of touch lead lines, provide a touch driving signal to the plurality of second electrode blocks and receive a touch detection signal from the plurality of second electrode blocks in a touch phase; and the plurality of third electrode blocks are configured to receive a second common voltage signal or be floated in the touch phase to enable the touch operation.

9 . The touch panel according to claim 8 , wherein the controller is further configured to, respectively through the plurality of touch lead lines, provide the first common voltage signal to the plurality of second electrode blocks in a display phase.

10 . The touch panel according to claim 1 , further comprising a plurality of conductive blocks,
wherein the plurality of conductive blocks are between the first substrate and the second substrate, and each of the plurality of conductive blocks is in electrical contact with a corresponding first electrode block and a corresponding second electrode block, respectively, to allow the corresponding first electrode block to be electrically connected to the corresponding second electrode block.

11 . The touch panel according to claim 10 , wherein the first substrate further comprises a black matrix,
the black matrix comprises a plurality of black matrix strips, the plurality of black matrix strips are configured to define a plurality of opening regions, and an orthographic projection of the conductive block on the first substrate or the second substrate at least partially overlaps with an orthographic projection of the black matrix strip on the first substrate or the second substrate.

12 . The touch panel according to claim 10 , wherein the conductive block comprises a conductive ball.

13 . The touch panel according to claim 10 , further comprising a first insulating layer,
wherein the first insulating layer covers other portions of the second electrode pattern layer except for a portion of the second electrode pattern layer in contact with the plurality of conductive blocks.

14 . The touch panel according to claim 10 , wherein a height of the conductive block in a direction in which the first substrate and the second substrate are opposite to each other is greater than a minimum distance between the first substrate and the second substrate.

15 . The touch panel according to claim 1 , wherein the plurality of touch lead lines are on a side of the second electrode pattern layer away from the first substrate, and the plurality of touch lead lines are electrically connected with the plurality of second electrode blocks through a plurality of via holes, respectively.

16 . The touch panel according to claim 1 , wherein an orthographic projection of one first electrode block on the first substrate or the second substrate at least partially overlaps with an orthographic projection of a corresponding second electrode block on the first substrate or the second substrate.

17 . The touch panel according to claim 1 , wherein the first electrode pattern layer, the second electrode pattern layer, and the third electrode pattern layer are transparent electrode layers.

18 . The touch panel according to claim 1 , wh

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Bi Yao
• Yuan Hongliang
• Zheng Qi
• Wu Xiaojuan
• Zhao Zhiqiang
• Zhong Xuan
• Cheng Zhangxiang
• Wang Jiaxing
• Zhang Donghua

Classifications

• G06F3/04184

  Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally · CPC title

• G06F3/0443 Primary

  using a single layer of sensing electrodes · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G09G3/20

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• G09G2354/00

  Aspects of interface with display user · CPC title