Touch control structure, touch display panel and electronic device

Patent metadata

Field	Value
Publication number	US-12436653-B2
Application number	US-202218558297-A
Country	US
Kind code	B2
Filing date	Oct 31, 2022
Priority date	Oct 31, 2022
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A touch control structure, a touch display panel and an electronic device are provided. The touch control structure includes: a first metal layer and a second metal layer stacked on the base substrate, an insulating layer between the first metal layer and the second metal layer, the first metal layer includes a plurality of first touch sub-electrodes arranged along a first direction and spaced apart from each other, a plurality of second touch sub-electrodes and a plurality of connection electrodes which are arranged along a second direction, the plurality of first touch sub-electrodes and the plurality of second touch sub-electrodes are spaced apart from each other; the second metal layer includes a plurality of bridge electrodes spaced apart from each other, each of the plurality of bridge electrodes is electrically connected with two adjacent first touch sub-electrodes through a plurality of via structures in the insulating layer.

First claim

The invention claimed is:

1. A touch control structure, comprising:
a base substrate; and
a first metal layer and a second metal layer stacked on the base substrate, and an insulating layer sandwiched between the first metal layer and the second metal layer,
wherein the first metal layer comprises a plurality of first touch sub-electrodes sequentially arranged along a first direction and spaced apart from each other, and a plurality of second touch sub-electrodes and a plurality of connection electrodes which are sequentially arranged along a second direction, the first direction intersects with the second direction, and the plurality of first touch sub-electrodes and the plurality of second touch sub-electrodes are spaced apart from each other;
the second metal layer comprises a plurality of bridge electrodes spaced apart from each other, and each of the plurality of bridge electrodes is electrically connected with two adjacent first touch sub-electrodes through a plurality of via structures in the insulating layer, so as to electrically connect any adjacent first touch sub-electrodes to form a first touch electrode extending in the first direction;
the plurality of second touch sub-electrodes and the plurality of connection electrodes are alternately arranged one by one and electrically connected in sequence to form a second touch electrode extending along the second direction;
an orthographic projection of each of the plurality of bridge electrodes on the base substrate is overlapped with an orthographic projection of a corresponding connection electrode on the base substrate;
on a plane parallel to a main surface of the base substrate, the touch control structure is divided into a middle area and a peripheral area surrounding the middle area, at least in the middle area, the plurality of bridge electrodes comprise a first bridge electrode and a second bridge electrode which are adjacent to each other, and the two adjacent first touch sub-electrodes connected with the first bridge electrode are a first group of touch sub-electrodes, the two adjacent first touch sub-electrodes connected with the second bridge electrode are a second group of touch sub-electrodes, the first group of touch sub-electrodes and the second group of touch sub-electrodes are different touch sub-electrodes, and extension directions of the first bridge electrode and the second bridge electrode which are adjacent to each other intersect with each other;
the plurality of via structures comprise four groups of first via structures and second via structures which are oppositely arranged in the extension direction of each of the plurality of bridge electrodes;
the first metal layer comprises a plurality of first metal grids defined by a plurality of first metal lines and a plurality of second metal lines intersecting with each other;
in the middle area, the extension directions of the plurality of first metal lines in the first metal layer are all parallel to the extension direction of the second bridge electrode, and the extension directions of the plurality of second metal lines in the first metal layer are all parallel to the extension direction of the first bridge electrode;
four first via structures at the first side of the first bridge electrode in the extension direction of the first bridge electrode are connected in sequence to form a first quadrilateral shape, and the first quadrilateral shape is at an edge position of a corresponding first touch sub-electrode;
the plurality of connection electrodes comprise a first connection electrode corresponding to and intersecting with the first bridge electrode, the first quadrilateral shape comprises a first edge and a second edge which are connected with each other, the first quadrilateral shape comprises one first edge and two second edges, and the first edge is formed by connecting two first via structures which are closest to the first connection electrode among the four first via structures at the first side, the first edge is parallel to the extension directions of the plurality of first metal lines, the two second edges are two edges connected with the first edge, the second edge is parallel to the extension directions of the plurality of second metal lines, and the first metal line corresponding to the first edge is disconnected at both ends; and/or
four first via structures at the first side of the second bridge electrode in the extension direction of the second bridge electrode are connected in sequence to form a third quadrilateral shape, and the third quadrilateral shape is at an edge position of a corresponding first touch sub-electrode;
the plurality of connection electrodes comprise a second connection electrode corresponding to and intersecting with the second bridge electrode, the third quadrilateral shape comprises a fifth edge and a sixth edge which are connected with each other, the third quadrilateral shape comprises one fifth edge and two sixth edges, and the fifth edge is formed by connecting two first via structures which are closest to the second connection electrode among the four first via structures at the first side, the fifth edge is parallel to the extension directions of the plurality of second metal lines, the two sixth edges are two edges connected with the fifth edge, the sixth edge is parallel to the extension directions of the plurality of first metal lines, and the second metal line corresponding to the fifth edge is disconnected at both ends.

2. The touch control structure according to claim 1 , wherein the first bridge electrode and the second bridge electrode which are adjacent in the first direction are symmetrical about a straight line extending in the second direction.

3. The touch control structure according to claim 2 , wherein the first bridge electrode and the second bridge electrode which are adjacent in the second direction are symmetrical about a straight line extending in the first direction.

4. The touch control structure according to claim 3 , wherein an extension direction of each of the plurality of bridge electrodes is perpendicular to an extension direction of a corresponding connection electrode.

5. The touch control structure according to claim 4 , wherein, in the middle area, the extension directions of the first bridge electrode and the second bridge electrode which are adjacent to each other are perpendicular to each other.

6. The touch control structure according to claim 1 , wherein,
each of the plurality of first metal grids has a quadrilateral shape, and each of the plurality of first touch sub-electrodes comprises multiple first metal grids in the plurality of first metal grids and each of the second touch sub-electrodes comprises multiple first metal grids in the plurality of first metal grids;
in the middle area, extension directions of the plurality of first metal lines are all parallel to the extension direction of the first bridge electrode, and the extension directions of the plurality of second metal lines are all parallel to the extension direction of the second bridge electrode, or the extension directions of the first metal lines are all parallel to the extension direction of the second bridge electrode, and the extension directions of the plurality of second metal lines are all parallel to the extension direction of the first bridge electrode.

7. The touch control structure according to claim 6 , wherein,
the plurality of via structures comprise a first via structure and a second via structure which are oppositely arranged in the extension direction of each of the plurality of bridge electrodes; the first touch sub-electrode located at a first end of each of the plurality of bridge electrodes is electrically connected with a corresponding bridge electrode through the first via st

Assignees

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

Inventors

• Chen Tianci
• Luo Chang
• Zhang Yi
• Wen Ping
• Zeng Yang
• Wang Wei
• Wang Yu
• Wang Siyu
• Dai Junxiu
• Liu Song

Classifications

• 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

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• G06F3/04164 Primary

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title