Display panel and display apparatus

Patent metadata

Field	Value
Publication number	US-12314504-B2
Application number	US-202218690756-A
Country	US
Kind code	B2
Filing date	May 23, 2022
Priority date	May 23, 2022
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A display panel and a display device are disclosed. The display panel includes a display substrate and a touch screen. The touch screen includes a third touch control layer. The third touch control layer includes a first connection part and a second connection part. The first electrode disconnected in the first display area is made conductive through the first connection part, and the second electrode disconnected in the first display area is made conductive through the second connection part. The first connection part and the second connection part form a new mutually capacitive coupling structure in the first display area, thereby achieving the touch function of the first display area. The material of the third touch control layer is transparent conductive material.

First claim

What is claimed is:

1. A display panel, comprising a display area, wherein the display area comprises a first display area and a second display area arranged around the first display area, and the display panel comprises a display substrate and a touch screen, the touch screen comprises:
a first touch control layer provided on a side of the display substrate, wherein the first touch control layer comprises at least one first electrode extending along a first direction, the first electrode is disconnected in the first display area, and a first segment and a second segment are formed;
a second touch control layer provided on a side of the first touch control layer away from the display substrate, wherein the second touch control layer is insulated from the first touch control layer, the second touch control layer comprises at least one second electrode extending along a second direction, the second direction intersects the first direction, the second electrode is disconnected in the first display area, and a third segment and a fourth segment are formed;
a third touch control layer provided on a different layer from the first touch control layer and the second touch control layer, wherein the third touch control layer is insulated from the first touch control layer and the second touch control layer, the third touch control layer comprises at least one set of a first connection part and a second connection part, the second connection part and the first connection part are not in conduction with each other and form a capacitance, the first segment and the second segment are electrically connected through the first connection part, the third segment and the fourth segment are electrically connected through the second connection part, and a material of the third touch control layer is transparent conductive material.

2. The display panel according to claim 1 , wherein the second connection part and the first connection part are arranged on a same layer, and the second connection part is spaced apart at the outer periphery of the first connection part.

3. The display panel according to claim 2 , wherein the third touch control layer is provided between the first touch control layer and the second touch control layer, and the touch screen further comprises:
a first insulating layer provided between the first touch control layer and the third touch control layer, wherein a first via hole is provided on the first insulating layer, and the first touch control layer passes through the first via hole and is electrically connected to the first connection part;
a second insulating layer provided between the third touch control layer and the second touch control layer, wherein a second via hole is provided on the second insulating layer, and the second touch control layer passes through the second via hole and is electrically connected to the second connection part.

4. The display panel according to claim 2 , wherein the third touch control layer is provided on a side of the first touch control layer close to the display substrate, and the touch screen further comprises:
a first insulating layer provided between the first touch control layer and the third touch control layer, wherein a first via hole and a second via hole are provided on the first insulating layer;
a second insulating layer provided between the first touch control layer and the second touch control layer, wherein a third via hole is provided on the second insulating layer, an orthographic projection of the third via hole on the display substrate is located within an orthographic projection of the first via hole on the display substrate;
wherein the first touch control layer passes through the second via hole and is electrically connected to the second connection part, and the second touch control layer passes through the third via hole and the first via hole and is electrically connected to the first connection part.

5. The display panel according to claim 2 , wherein the third touch control layer is provided on a side of the second touch control layer away from the display substrate, and the touch screen further comprises:
a first insulating layer provided between the first touch control layer and the second touch control layer, wherein a first via hole is provided on the first insulating layer;
a second insulating layer provided between the second touch control layer and the third touch control layer, wherein a second via hole and a third via hole are provided on the second insulating layer, and an orthographic projection of the second via hole on the display substrate is located within an orthographic projection of the first via hole on the display substrate;
wherein the first touch control layer passes through the first via hole and the second via hole and is electrically connected to the first connection part, and the second touch control layer passes through the third via hole and is electrically connected to the second connection part.

6. The display panel according to claim 3 , wherein the first connection part is circular and the second connection part is annular;
a diameter of the first connection part is: D2≥D1+2b;
a width of the second connection part is: A≥2b;
wherein: D2 is the diameter of the first connection part, D1 is a diameter of a second opening, b is a diameter of the first via hole, and A is the width of the second connection part.

7. The display panel of claim 2 , wherein the first touch control layer comprises a plurality of first electrodes extending along the first direction, and the plurality of first electrodes are disconnected in the first display area, and a plurality of sets of first segments and second segments are formed;
the second touch control layer comprises a plurality of second electrodes extending in the second direction, and the plurality of second electrodes are disconnected in the first display area, and a plurality of sets of third segments and fourth segments are formed;
the third touch control layer comprises a plurality of sets of first connection parts and second connection parts, the plurality of sets of first connection parts and second connection parts form a plurality of capacitors, the plurality of first connection parts are not in conduction with each other, the plurality of the second connection parts are not in conduction with each other, each set of the first segment and the second segment is electrically connected through one of the first connection parts, and each set of the third segment and the fourth segment is connected through one of the second connection parts.

8. The display panel according to claim 1 , wherein the second connection part and the first connection part are provided in different layers, and the first connection part is provided on a side of the first touch control layer close to the display substrate, and the second connection portion is provided on a side of the second touch control layer away from the display substrate.

9. The display panel of claim 1 , wherein a part of the first touch control layer located in the first display area is removed and a first opening is formed, and a part of the second touch control layer located in the second display area is removed and a second opening is formed, an orthographic projection of the first display area on the display substrate is located within an orthographic projection of the second opening on the display substrate, and an orthographic projection of the second opening on the display substrate is located within an orthographic projection of the first opening on the display substrate.

10. The display panel according to claim 2 , wherein the display panel further comprises:
a third insulating layer provided between the display substr

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Zhang Guiyu
• Min Hang
• Luo Ping
• Wang Zhiqiang
• Jiang Liqing
• Wang Qiang
• Liu Shuai

Classifications

• G06F3/0445

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F2203/04111

  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 · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/041

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