Touch electrode structure and touch display panel

• US 10,444,879 B2
• Filed: 06/20/2017
• Issued: 10/15/2019
• Est. Priority Date: 09/29/2016
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Wang, Zhun, Xu, Jun, Zhang, Lei, Xu, Jiawei
• Primary Examiner(s): Harris, Dorothy
• Application Number:
  US15/742,711
• Publication Number:
  US 20180373367A1
• Time in Patent Office: 847 Days
• Field of Search: None
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

A touch electrode structure and a touch display panel are provided. The touch electrode structure includes a plurality of first touch electrodes and a plurality of second touch electrodes. The plurality of first touch electrodes are extending along a first direction, each of the first touch electrodes has a shape of a polygon and includes a plurality of first edges, a range of an angle between an extension direction of each of the first edges and the first direction is 20 to 25 degrees; the plurality of second touch electrodes are extending along a second direction, each of the second touch electrodes has a shape of a polygon and includes a plurality of second edges, a range of an angle of an extension direction of each of the second edges and the second direction is 20 to 25 degrees.

Claims

1. A touch electrode structure, comprising:

a base substrate;

a plurality of first touch electrodes, disposed on the base substrate and extending along a first direction;

a plurality of second touch electrodes, disposed on the base substrate and extending along a second direction;

a plurality of first floating electrodes, disposed in a one-to-one correspondence with the plurality of first touch electrodes; and

a plurality of second floating electrodes, disposed in a one-to-one correspondence with the plurality of second touch electrodes,

wherein each of the first touch electrodes has a shape of a polygon and comprises a plurality of first edges, a range of an angle between an extension direction of each of the first edges and the first direction is 20 to 25 degrees, each of the second touch electrodes has a shape of a polygon and comprises a plurality of second edges, a range of an angle of an extension direction of each of the second edges and the second direction is 20 to 25 degrees,

wherein each of the first floating electrodes comprises two first sub floating electrodes, the two first sub floating electrodes are respectively disposed on two sides of a first touch electrode corresponding to the first floating electrode and spaced apart from the first touch electrode by a first distance, each of the second floating electrodes comprises two second sub floating electrodes, the two second sub floating electrodes are respectively disposed on two sides of a second touch electrode corresponding to the second floating electrode and spaced apart from the second touch electrode by a second distance,

wherein the plurality of first floating electrodes and the plurality of second floating electrodes are disposed in a region of the base substrate where the first touch electrodes and the second touch electrodes are not disposed, and adjacent ones of the first floating electrodes and the second floating electrodes are separated by a third distance,

wherein the first distance, the second distance, and the third distance are equal, and

wherein the two first sub floating electrodes disposed on two sides of the first touch electrode and the first touch electrode corresponding thereto form a substantially rectangular pattern, the two second sub floating electrodes disposed on two sides of the second touch electrode and the second touch electrode corresponding thereto form a substantially rectangular pattern, the first sub floating electrodes and the second sub floating electrodes are sub floating electrodes which are mutually independent.

2. The touch electrode structure according to claim 1, wherein the polygon is a diamond.

3. The touch electrode structure according to claim 1, wherein adjacent ones of the first touch electrodes are electrically connected, and adjacent ones of the second touch electrodes are electrically connected by a strip-shaped bridge portion.

4. The touch electrode structure according to claim 1, wherein the first distance, the second distance, and the third distance are less than 30 μ

m.

5. The touch electrode structure according to claim 1, wherein the first direction is perpendicular to the second direction.

6. The touch electrode structure according to claim 1, wherein each of the first sub floating electrodes disposed on two sides of the first touch electrode comprises a third edge opposite to a first edge of the first touch electrode, a first inclined edge extending in a third direction, and a second inclined edge extending in a fourth direction, each of the second sub floating electrodes disposed on two sides of the second touch electrode comprises a fourth edge opposite to a second edge of the second touch electrode, a third inclined edge extending in the third direction, and a fourth inclined edge extending in the fourth direction, wherein the third direction is perpendicular to the fourth direction.

7. The touch electrode structure according to claim 6, wherein the first inclined edge, the second inclined edge, the third inclined edge, and the fourth inclined edge each comprise a plurality of bending portions connected end to end, the bending portions comprise a first bending portion and a second bending portion, a range of an angle between an extension direction of the first bending portion and the first direction is 20 to 25 degrees, a range of an angle between an extension direction of the second bending portion and the second direction is 20 to 25 degrees.

8. The touch electrode structure according to claim 1, wherein the first touch electrodes comprise a touch drive electrode, the second touch electrodes comprise a touch sense electrode, or, the first touch electrodes comprise a touch sense electrode, the second touch electrodes comprise a touch drive electrode.

9. A touch display panel, comprising:

a display panel; and

a touch electrode structure disposed on the display panel, wherein the touch electrode structure comprises the touch electrode structure according to claim 1.

10. The touch display panel according to claim 9, wherein

the display panel comprises a plurality of sub-pixel units configured to display, each of the sub-pixel units has a first width,

wherein the first distance is less than the first width, the second distance is less than the first width.

11. The touch display panel according to claim 10, wherein the plurality of sub-pixel units are arranged in a matrix, the first direction is a row direction of the matrix, the second direction is a column direction of the matrix.

12. The touch display panel according to claim 11, wherein the plurality of sub-pixel units have different colors, and the sub-pixel units in a same column have a same color.