Touch substrate, touch display panel and touch display apparatus

Patent metadata

Field	Value
Publication number	US-11347365-B2
Application number	US-202017422100-A
Country	US
Kind code	B2
Filing date	Aug 14, 2020
Priority date	Aug 14, 2019
Publication date	May 31, 2022
Grant date	May 31, 2022

Abstract

A touch substrate includes a base, a first electrode layer, a dielectric layer and a second electrode layer that are sequentially stacked on the base. The first electrode layer has first electrode regions and first auxiliary regions, and the second electrode layer has second electrode regions and second auxiliary regions. The first electrode layer includes a first mesh electrode including first mesh sub-electrodes and second mesh sub-electrodes. A region where each first mesh sub-electrode is located overlaps a second electrode region, and a region where each second mesh sub-electrode is located overlaps a second auxiliary region. The second electrode layer includes a second mesh electrode including third mesh sub-electrodes and fourth mesh electrodes. A region where each third mesh sub-electrode is located overlaps a first electrode region, and a region where the fourth mesh sub-electrode is located overlaps a first auxiliary region.

First claim

What is claimed is:

1. A touch substrate, comprising:
a base; and
a first electrode layer, a dielectric layer and a second electrode layer that are stacked in sequence on the base; wherein
the first electrode layer has a plurality of first electrode regions and a plurality of first auxiliary regions that extend in a first direction and are alternately arranged in sequence in a second direction, and the second electrode layer has a plurality of second electrode regions and a plurality of second auxiliary regions that extend in the second direction and are alternately arranged in sequence in the first direction, the first direction intersects the second direction; wherein
the first electrode layer includes a first mesh electrode disposed in each first electrode region; the first mesh electrode includes a plurality of first mesh sub-electrodes and a plurality of second mesh sub-electrodes that are alternately arranged in the first direction and are electrically connected in sequence; and a region where each first mesh sub-electrode is located overlaps a second electrode region, a region where each second mesh sub-electrode is located overlaps a second auxiliary region, and a density of cells of the first mesh sub-electrode is less than a density of cells of the second mesh sub-electrode; and
the second electrode layer includes a second mesh electrode disposed in each second electrode region; the second mesh electrode includes a plurality of third mesh sub-electrodes and a plurality of fourth mesh sub-electrodes that are alternately arranged in the second direction and are electrically connected in sequence; and a region where each third mesh sub-electrode is located overlaps a first electrode region, a region where each fourth mesh sub-electrode is located overlaps a first auxiliary region, and a density of cells of the third mesh sub-electrode is less than a density of cells of the fourth mesh sub-electrode.

2. The touch substrate according to claim 1 , wherein a ratio of the density of the cells of the first mesh sub-electrode to the density of the cells of the second mesh sub-electrode is approximately 1:2; and/or
a ratio of the density of the cells of the third mesh sub-electrode to the density of the cells of the fourth mesh sub-electrode is approximately 1:2.

3. The touch substrate according to claim 1 , wherein the density of the cells of the first mesh sub-electrode is substantially the same as the density of the cells of the third mesh sub-electrode; and/or
the density of the cells of the second mesh sub-electrode is substantially the same as the density of the cells of the fourth mesh sub-electrode.

4. The touch substrate according to claim 1 , wherein mesh electrodes included in the first electrode layer and mesh electrodes included in the second electrode layer each include:
a plurality of first electrode lines extending in a third direction, and a plurality of second electrode lines extending in a fourth direction,
the plurality of first electrode lines and the plurality of second electrode lines intersecting to form cells of the mesh electrode, and the third direction intersecting the fourth direction.

5. The touch substrate according to claim 4 , wherein a ratio of the density of the cells of the first mesh sub-electrode to the density of the cells of the second mesh sub-electrode is approximately 1:2,
a ratio of a distance between two adjacent first electrode lines in the first mesh sub-electrode to a distance between two adjacent first electrode lines in the second mesh sub-electrode is approximately 2:1; and a ratio of a distance between two adjacent second electrode lines in the first mesh sub-electrode to a distance between two adjacent second electrode lines in the second mesh sub-electrode is approximately 2:1; and/or
a ratio of the density of the cells of the third mesh sub-electrode to the density of the cells of the fourth mesh sub-electrode is approximately 1:2,
a ratio of a distance between two adjacent first electrode lines in the third mesh sub-electrode to a distance between two adjacent first electrode lines in the fourth mesh sub-electrode is approximately 2:1; and a ratio of a distance between two adjacent second electrode lines in the third mesh sub-electrode and a distance between two adjacent second electrode lines in the fourth mesh sub-electrode is approximately 2:1; and/or
the density of the cells of the first mesh sub-electrode is substantially the same as the density of the cells of the third mesh sub-electrode,
a distance between two adjacent first electrode lines in the first mesh sub-electrode is substantially the same as a distance between two adjacent first electrode lines in the third mesh sub-electrode; and a distance between two adjacent second electrode lines in the first mesh sub-electrode is substantially the same as a distance between two adjacent second electrode lines in the third mesh sub-electrode; and/or
the density of the cells of the second mesh sub-electrode is substantially the same as the density of the cells of the fourth mesh sub-electrode,
a distance between two adjacent first electrode lines in the second mesh sub-electrode is substantially the same as a distance between two adjacent first electrode lines in the fourth mesh sub-electrode; and a distance between two adjacent second electrode lines in the second mesh sub-electrode is substantially the same as a distance between two adjacent second electrode lines in the fourth mesh sub-electrode.

6. The touch substrate according to claim 4 , wherein in an orthogonal projection of a combination of the first electrode layer and the second electrode layer on the base,
a distance between projections of two adjacent first electrode lines is in a range from 100 μm to 400 μm; and
a distance between projections of two adjacent second electrode lines is in a range from 100 μm to 400 μm.

7. The touch substrate according to claim 4 , wherein a line width of each first electrode line is in a range from 3 μm to 10 μm; and a line width of each second electrode line is in a range from 3 μm to 10 μm.

8. The touch substrate according to claim 1 , wherein a shape of cells of a mesh electrode included in the first electrode layer and a shape of cells of a mesh electrode included in the second electrode layer each include at least one of a rectangular shape, a square shape, and a rhombic shape.

9. The touch substrate according to claim 1 , wherein in the second electrode layer, no mesh electrode is provided in a region overlapping the region where the second mesh sub-electrode is located in the second auxiliary region.

10. The touch substrate according to claim 9 , wherein a density of cells of an orthogonal projection of a combination of the first mesh sub-electrode and the third mesh sub-electrode on the base is substantially the same as a density of cells of an orthogonal projection of the second mesh sub-electrode on the base.

11. The touch substrate according to claim 10 , wherein a pattern of the orthogonal projection of the combination of the first mesh sub-electrode and the third mesh sub-electrode on the base is substantially the same as a pattern of the orthogonal projection of the second mesh sub-electrode on the base.

12. The touch substrate according to claim 1 , wherein in the first electrode layer, no mesh electrode is provided in a region overlapping the region where the fourth mesh sub-electrode is located in the first auxiliary region.

13. The touch substrate according to claim 12 , wherein a density of cells of an orthogonal projection of a combination of the first mesh sub-electrode and the third mesh sub-electrode on the base is subst

Assignees

• Hefei Xinsheng Optoelectronics Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Xu Jiawei
• Dong Zhao
• Fan Wenjin
• Li Le
• Li Bisheng

Classifications

• G06F3/0446 Primary

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

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/0448

  Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · 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