Display panel and display device

• US 10,545,603 B2
• Filed: 06/03/2016
• Issued: 01/28/2020
• Est. Priority Date: 02/02/2016
• Status: Active Grant

• Current Assignee: Shanghai AVIC Optoelectronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Original Assignee: Shanghai AVIC Optoelectronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Inventors: Jian, Shoufu, Xia, Zhiqiang, Cao, Zhaokeng
• Primary Examiner(s): Lee, Nicholas J
• Application Number:
  US15/172,565
• Publication Number:
  US 20170220178A1
• Time in Patent Office: 1,334 Days
• Field of Search: None
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors

Abstract

A display panel is provided. The display includes a first electrode layer and a second electrode layer. The first electrode layer includes a plurality of first electrodes, each having a shape extending in a first direction, wherein the plurality of the first electrodes are arranged in a second direction. The second electrode layer includes a plurality of second electrodes extending in the second direction and arranged in the first direction, the second direction being perpendicular to the first direction. A ration between a first central distance between two adjacent first electrodes, and a second central distance between two adjacent second electrodes is in the range of 0.5 to 2. In the display panel and the display device according to the present disclosure, the display effect is reconciled with the touch recognizing performance, thereby improving the touch performance of the panel and user experience.

Claims

1. A display panel, comprising:

a first electrode layer comprising a plurality of first electrodes, each having a first edge and a second edge extending in a first direction, wherein;

the first direction is vertical on the display panel;

the plurality of the first electrodes are arranged in a second direction; and

the second direction is horizontal on the display panel;

a second electrode layer comprising a plurality of second electrodes, each having a third edge and a fourth edge extending in the second direction, wherein;

the plurality of the second electrodes are arranged in the first direction;

a ratio between a first distance between the first edges of two adjacent first electrodes, and a second distance between the third edges of two adjacent second electrodes is greater than 0.5 and smaller than 1.0;

a width of the first electrode equals to a width of the second electrode; and

an orthographic projection of the first electrode on the second electrode has an overlapped region with the second electrode, and the overlapped region is a square.

2. The display panel according to claim 1, wherein the first electrode has a first electrode width in the second direction, and the two adjacent first electrode have a first gap width in the second direction;

and

the second electrode has a second electrode width in the first direction, and the two adjacent second electrodes have a second gap width in the first direction,

wherein the first distance equals to a sum of the first electrode width and the first gap width, and the second distance equals to a sum of the second electrode width and the second gap width.

3. The display panel according to claim 1, further comprising:

a first substrate and a second substrate arranged opposite to each other, and

a liquid crystal layer interposed between the first substrate and the second substrate.

4. The display panel according to claim 3, wherein the first electrode layer is disposed on the first substrate at a side facing the second substrate, and the second electrode layer is disposed on the second substrate at a side opposite to the first substrate.

5. The display panel according to claim 3, further comprising a data line and a scan line disposed on the first substrate, the data line extending in the first direction, and the scan line extending in the second direction.

6. The display panel according to claim 3, wherein the first electrode layer also serves as a common electrode layer.

7. The display panel according to claim 6, wherein the display panel is driven in a time division manner, and wherein:

during a display period, the first electrode receives a common voltage signal, and

during a touch period, the first electrode receives a touch driving signal.

15. The display panel according to claim 1, wherein the ratio between the first distance between the first edges of two adjacent first electrodes, and the second distance between the third edges of two adjacent second electrodes is in the range of 0.6 to 0.9.

17. The display panel according to claim 3, wherein the first electrode layer is disposed on the first substrate at a side facing the second substrate, and the second electrode layer is disposed on the second substrate at a side facing the first substrate.

8. A display device, comprising:

a display panel, comprising;

a first electrode layer comprising a plurality of first electrodes, each having a first edge and a second edge extending in a first direction, wherein;

the first direction is vertical on the display panel;

the plurality of the first electrodes are arranged in a second direction; and

the second direction is horizontal on the display panel;

a second electrode layer comprising a plurality of second electrodes, each having a third edge and a fourth edge extending in the second direction, wherein;

the plurality of the second electrodes are arranged in the first direction;

a ratio between a first distance between the first edges of two adjacent first electrodes, and a second distance between the third edges of two adjacent second electrodes is greater than 0.5 and smaller than 1.0;

a width of the first electrode equals to a width of the second electrode; and

an orthographic projection of the first electrode on the second electrode has an overlapped region with the second electrode, and the overlapped region is a square.

9. The display device according to claim 8, wherein the first electrode has a first electrode width in the second direction, and the two adjacent first electrode have a first gap width in the second direction;

and

the second electrode has a second electrode width in the first direction, and the two adjacent second electrodes have a second gap width in the first direction,

wherein the first distance equals to a sum of the first electrode width and the first gap width, and the second distance equals to a sum of the second electrode width and the second gap width.

10. The display device according to claim 8, further comprising a first substrate and a second substrate arranged opposite to each other, and a liquid crystal layer interposed between the first substrate and the second substrate.

11. The display device according to claim 10, wherein the first electrode layer is disposed on the first substrate at a side facing the second substrate, and the second electrode layer is disposed on the second substrate at a side opposite to the first substrate.

12. The display device according to claim 10, further comprising a data line and a scan line disposed on the first substrate, the data line extending in the first direction, and the scan line extending in the second direction.

13. The display device according to claim 10, wherein the first electrode layer also serves as a common electrode layer.

14. The display device according to claim 13, wherein the display panel is driven in a time division manner, and wherein:

during a display period, the first electrode receives a common voltage signal, and

during a touch period, the first electrode receives a touch driving signal.

16. The display device according to claim 8, wherein the ratio between the first distance between the first edges of two adjacent first electrodes, and the second distance between the third edges of two adjacent second electrodes is in the range of 0.6 to 0.9.

18. The display device according to claim 10, wherein the first electrode layer is disposed on the first substrate at a side facing the second substrate, and the second electrode layer is disposed on the second substrate at a side facing the first substrate.