Touch display panel and touch display device

Patent metadata

Field	Value
Publication number	US-11520443-B2
Application number	US-201916449225-A
Country	US
Kind code	B2
Filing date	Jun 21, 2019
Priority date	Dec 28, 2018
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A touch display panel and a touch display device are provided. The touch display panel has a display region and a non-display region arranged on a periphery of the display region, and the display region has a non-rectangular shape. The touch display panel comprises a plurality of first touch electrodes and a plurality of second touch electrodes. The plurality of first touch electrodes is arranged in the display region. The plurality of second touch electrodes is arranged at a side of the first touch electrode next to the non-display region. The second touch electrode has a different shape from the first touch electrode. An area of the first touch electrode is S1, an area of the second touch electrode is S2, and S1 and S2 satisfy: 0.85S1S21.15S1.

First claim

What is claimed is:

1. A touch display panel, comprising:
a display region and a non-display region arranged on a periphery of the display region, wherein the display region has a non-rectangular shape;
a plurality of first touch electrodes arranged in the display region; and
a plurality of second touch electrodes arranged to be next to the non-display region;
wherein each of the plurality of second touch electrodes has a different shape from a shape of the plurality of first touch electrodes,
wherein an area of each of the plurality of first touch electrodes is S1, an area of at least one of the second touch electrodes of the plurality of second touch electrodes is S2, wherein S1 and S2 satisfy: 0.85S1 S2 1.15S1,
wherein each of the plurality of first touch electrodes comprises a first side, and each of the plurality of second touch electrodes at least comprises a second side adjacent to the first side along a column direction, and the second side of the second touch electrode has a greater length than the first side of one of the first touch electrode,
wherein for one second touch electrode of the plurality of second touch electrodes and two first touch electrodes of the plurality of first touch electrode that are adjacent along the column direction to the second touch electrode, an orthographic projection of a touch trace of the second touch electrode on a plane of the display panel is located, along a row direction, between orthographic projections of touch traces of the two first touch electrodes on the plane of the display panel, and the one second touch electrode comprises a third side which is aligned along the column direction with a fourth side of one of the two first touch electrodes.

2. The touch display panel according to claim 1 , wherein each of the plurality of first touch electrodes has a same shape.

3. The touch display panel according to claim 2 , wherein the second side is parallel to the first side.

4. The touch display panel according to claim 3 , wherein the plurality of second touch electrodes is arranged in the display region.

5. The touch display panel according to claim 4 , wherein S1 S2.

6. The touch display panel according to claim 2 , wherein at least one of the plurality of second touch electrodes comprises a first portion arranged in the display region and a second portion arranged in the non-display region.

7. The touch display panel according to claim 2 , wherein the plurality of second touch electrodes comprises a first type and a second type;
wherein the first type includes the second touch electrodes each having a full area inside the display region; and
wherein the second type includes the second touch electrodes each having a portion inside the display region and another portion in the non-display region.

8. The touch display panel according to claim 1 , wherein one of the plurality of second touch electrodes comprises a third side, an extending direction of the third side is not parallel to any side of one of the plurality of first touch electrodes, and the third side is arranged in the non-display region.

9. The touch display panel according to claim 8 , wherein each of the plurality of first touch electrodes comprises a fourth side, and each of the plurality of second touch electrodes at least comprises a fifth side parallel to the fourth side of the plurality of first touch electrodes, and the fifth side of the plurality of second touch electrodes has a smaller length than the fourth side of the plurality of second touch electrodes.

10. The touch display panel according to claim 9 , wherein the third side is connected to the fifth side.

11. The touch display panel according to claim 8 , wherein S2 S1.

12. The touch display panel according to claim 1 , wherein the plurality of first touch electrodes and the plurality of second touch electrodes are configured to receive a touch sensing signal during a touch phase.

13. The touch display panel according to claim 1 , further comprising a common electrode layer, a pixel electrode layer and a liquid crystal layer, wherein the common electrode layer comprises a plurality of common electrode blocks, the pixel electrode layer comprises a plurality of pixel electrodes, and the liquid crystal layer comprises liquid crystal molecules;
wherein during a display phase, the liquid crystal molecules are driven by an electric field formed by the plurality of common electrode blocks and the plurality of pixel electrodes to deflect; and
wherein during a touch phase, at least a part of the plurality of common electrode blocks is shared as first touch electrodes, and a part of the plurality of common electrode blocks is shared as second touch electrodes.

14. The touch display panel according to claim 13 , wherein an edge of the display region comprises a curvy portion, and each of the plurality of second touch electrodes is either next to the curvy portion or overlaps with a portion of the curvy portion.

15. The touch display panel according to claim 13 , wherein the display region comprises a first edge, a second edge and a third edge; wherein the first edge and the second edge are arranged perpendicular to each other, and the third edge intersects with both the first edge and the second edge; and
wherein the plurality of second touch electrodes each is either next to the third edge or overlaps with at least a portion of the third edge.

16. The touch display panel according to claim 1 , wherein the first portion and the second portion of a same second type of electrode share a same touch trace.

17. The touch display panel according to claim 1 , wherein an orthographic projection of a touch trace connected to the second touch electrode on a plane of the display panel does not overlap the first touch electrodes.

18. The touch display panel according to claim 17 , wherein the touch trace connected to the second touch electrode extends along a gap between adjacent first touch electrodes.

19. A touch display device, comprising a touch display panel, wherein the touch display panel comprises:
a display region and a non-display region arranged on a periphery of the display region, wherein the display region has a non-rectangular shape;
a plurality of first touch electrodes arranged in the display region; and
a plurality of second touch electrodes arranged to be next to the non-display region;
wherein each of the plurality of second touch electrodes has a different shape from a shape of the plurality of first touch electrodes,
wherein an area of each of the plurality of first touch electrodes is S1, an area of at least one of the second touch electrodes of the plurality of second touch electrodes is S2, wherein S1 and S2 satisfy: 0.85S1 S2 1.15S1,
wherein each of the plurality of first touch electrodes comprises a first side, and each of the plurality of second touch electrodes at least comprises a second side adjacent to the first side along a column direction, and the second side of the second touch electrode has a greater length than the first side of one of the first touch electrode,
wherein for one second touch electrode of the plurality of second touch electrodes and two first touch electrodes of the plurality of first touch electrode that are adjacent along the column direction to the second touch electrode, an orthographic projection of a touch trace of the second touch electrode on a plane of the display panel is located, along a row direction, between orthographic projections of touch traces of the two first touch electrodes on the plane of the dis

Assignees

• Xiamen Tianma Micro Electronics Co Ltd

Inventors

• Ma Yangzhao
• Chen Baoling
• Shen Boping
• Wu Ling

Classifications

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• G02F2201/123

  pixel · CPC title

• G06F3/0443 Primary

  using a single layer of sensing electrodes · CPC title

• G02F2201/121

  common or background · CPC title

• G06F3/04166

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title