Touch module, touch display panel and display device

Patent metadata

Field	Value
Publication number	US-12333104-B2
Application number	US-202418771563-A
Country	US
Kind code	B2
Filing date	Jul 12, 2024
Priority date	Jan 21, 2020
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

The disclosure provides a touch module, a touch display panel and a display device. Each touch electrode includes a plurality of electrode blocks arranged along an extending direction, and electrode blocks belonging to other touch electrodes are distributed in an area where at least part of all the electrode blocks are located, which makes full use of an interior area of a traditional touch pattern and increases a coupling area between the touch electrodes. When touch occurs, an amount of change in a mutual capacitance value between the touch electrodes will be significantly increased, thereby increasing touch sensitivity.

First claim

What is claimed is:

1. A touch module, comprising:
a base substrate; and
a plurality of touch electrodes on the base substrate; wherein
the plurality of touch electrodes comprise a plurality of first touch electrodes extending along a first direction and a plurality of second touch electrodes extending along a second direction;
each of the plurality of first touch electrodes comprises a plurality of first electrode blocks and a plurality of second electrode blocks, and each of the plurality of second touch electrodes comprises a plurality of third electrode blocks and a plurality of fourth electrode blocks;
in a same one of the plurality of first touch electrodes,
the plurality of first electrode blocks are arranged in sequence along the first direction;
each of the plurality of second electrode blocks is located in an area where a third electrode block adjacent to the plurality of first electrode blocks are located;
the plurality of second electrode blocks and the plurality of third electrode blocks are insulated from each other; and
the plurality of third electrode blocks each has a first hollow region in an area corresponding to a second electrode block, and an orthographic projection of the first hollow region on the base substrate is larger than an orthographic projection of the second electrode block on the base substrate;

and
in a same one of the second touch electrodes,
the plurality of third electrode blocks are arranged in sequence along the second direction;
each of the plurality of fourth electrode blocks is located in an area where a first electrode block adjacent to the plurality of third electrode blocks are located;
the plurality of fourth electrode blocks and the plurality of first electrode blocks are insulated from each other; and
the plurality of first electrode blocks each has a second hollow region in an area corresponding to a fourth electrode block, and an orthographic projection of the second hollow region on the base substrate is larger than an orthographic projection of the fourth electrode block on the base substrate.

2. The touch module according to claim 1 , wherein
in the same one of the plurality of first touch electrodes, each of the plurality of second electrode blocks is connected in series with an adjacent first electrode block;
in the same one of the second touch electrodes, each of the plurality of fourth electrode blocks is connected in series with an adjacent third electrode block.

3. The touch module according to claim 2 , wherein,
in the same one of the first touch electrodes, the plurality of first electrode blocks arranged in sequence along the first direction are connected in series; and
in the same one of the second touch electrodes, the plurality of third electrode blocks arranged in sequence along the second direction are connected in series.

4. The touch module according to claim 2 , wherein the plurality of first touch electrodes and the plurality of second touch electrodes are in a same film layer.

5. The touch module according to claim 2 , wherein,
the touch module further comprises a first bridge through which each of the plurality of second electrode blocks and adjacent ones of the plurality of first electrode blocks are connected in series; and
the touch module further comprises a second bridge through which each of the plurality of fourth electrode blocks and adjacent ones of the plurality of third electrode blocks are connected in series.

6. The touch module according to claim 5 , wherein an orthographic projection of the first bridge on the base substrate and an orthographic projection of the second bridge on the base substrate do not overlap with each other.

7. The touch module according to claim 5 , wherein all electrode blocks are in an electrode layer, the first bridge and the second bridge are in a bridge layer, and the bridge layer and the electrode layer have an insulation layer therebetween.

8. The touch module according to claim 7 , wherein the bridge layer is between the electrode layer and the base substrate.

9. The touch module according to claim 4 , wherein the first hollow region is provided therein a first floating electrode at a periphery of the second electrode block, and an orthographic projection of the first floating electrode on the base substrate is a closed hollow pattern enclosing the second electrode block.

10. The touch module according to claim 4 , wherein the second hollow region is provided therein a second floating electrode at a periphery of the fourth electrode block, and an orthographic projection of the second floating electrode on the base substrate is a closed hollow pattern enclosing the fourth electrode block.

11. The touch module according to claim 2 , wherein the plurality of first touch electrodes and the plurality of second touch electrodes are in different film layers.

12. The touch module according to claim 2 , wherein each of the plurality of third electrode blocks has two second electrode blocks belonging to different first touch electrodes, and the two second electrode blocks in a same third electrode block are insulated from each other.

13. The touch module according to claim 2 , wherein each of the plurality of first electrode blocks has two fourth electrode blocks belonging to different second touch electrodes, and the two fourth electrode blocks in a same first electrode block are insulated from each other.

14. The touch module according to claim 2 , wherein opposite outer boundaries of each of the plurality of second electrode blocks and the plurality of third electrode blocks are in a concave-convex zigzag shape; and/or, opposite outer boundaries of each of the plurality of fourth electrode blocks and the plurality of first electrode blocks are in a concave-convex zigzag shape.

15. The touch module according to claim 2 , wherein a shape of each of the plurality of third electrode blocks is a rhombus, a shape of each of the plurality of second electrode blocks is a triangle, and two sides of each of the plurality of second electrode blocks and two sides of a corresponding third electrode block are set in parallel.

16. The touch module according to claim 2 , wherein a shape of each of the plurality of first electrode blocks is a rhombus, a shape of each of the plurality of fourth electrode blocks is a triangle, and two sides of each of the plurality of fourth electrode blocks and two sides of a first corresponding electrode block are set in parallel.

17. A touch display panel comprising a touch module, wherein the touch module comprises:
a base substrate; and
a plurality of touch electrodes on the base substrate; wherein
the plurality of touch electrodes comprise a plurality of first touch electrodes extending along a first direction and a plurality of second touch electrodes extending along a second direction;
each of the plurality of first touch electrodes comprises a plurality of first electrode blocks and a plurality of second electrode blocks, and each of the plurality of second touch electrodes comprises a plurality of third electrode blocks and a plurality of fourth electrode blocks;
in a same one of the plurality of first touch electrodes,
the plurality of first electrode blocks are arranged in sequence along the first direction;
each of the plurality of second electrode blocks is located in an area where a third electrode block adjacent to the plurality of first electrode blocks are located;
the plurality of second electrode blocks and the plurality of third electrode blocks are insulated from each other; and
the plurality of t

Assignees

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

Inventors

• Jiang Yichen
• Luo Hongqiang
• Zhang Guiyu
• Li Zhenhua

Classifications

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/0448 Primary

  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

• G06F3/0446

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

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · 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