Display panel and its fabrication method, and display device

Patent metadata

Field	Value
Publication number	US-11500499-B2
Application number	US-202117217317-A
Country	US
Kind code	B2
Filing date	Mar 30, 2021
Priority date	Dec 28, 2020
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

A display panel and its fabrication method are provided. The display panel includes a display function layer and a touch control function layer. The touch control function layer includes a bridge connection layer with a bridge electrode, an insulating layer, and a touch control electrode layer disposed sequentially on a light-exiting side of the display function layer. The touch control electrode layer includes first touch control electrodes and second touch control electrodes insulated from each other. Each first touch control electrode includes first electrode units electrically connected to each other. Each second touch control electrode includes second electrode units electrically connected to each other. Two adjacent first electrode units are connected to each other through the bridge electrode. The bridge electrode includes a first edge, a second edge, and a deformation unit including a first deformation part and a second deformation part.

First claim

What is claimed is:

1. A display panel, comprising a display function layer and a touch control function layer, wherein;
the touch control function layer includes a bridge connection layer, an insulating layer, and a touch control electrode layer disposed sequentially on a light-exiting side of the display function layer;
the bridge connection layer includes at least one bridge electrode;
the touch control electrode layer includes a plurality of first touch control electrode strips and a plurality of second touch control electrode strips;
the plurality of first touch control electrode strips and the plurality of second touch control electrode strips are insulated from each other;
each of the plurality of first touch control electrode strips includes a plurality of first touch control electrodes electrically connected to each other and disposed along a first direction;
each of the plurality of second touch control electrode strips includes a plurality of second touch control electrodes electrically connected to each other and disposed along a second direction;
the first direction intersects the second direction;
in a same first touch control electrode strip of the plurality of first touch control electrode strips any two adjacent first touch control electrodes of the plurality of first touch control electrodes are connected to each other through the at least one bridge electrode;
an orthographic projection of the at least one bridge electrode on the display function layer has a first edge and a second edge opposite to each other;
at least one deformation unit is disposed at the first edge and the second edge;
the at least one deformation unit includes at least one first deformation part and at least one second deformation part;
the at least one first deformation part is disposed at the first edge and the second at least one deformation part is disposed at the second edge; and
each of the at least one first deformation part and the at least one second deformation part includes at least one edge tangent line intersecting an extending direction of the at least one bridge electrode.

2. The display panel according to claim 1 , wherein:
the at least one bridge electrode on a plane in a thickness direction of the display panel includes a trapezoid shape, and a bottom angle of the at least one bridge electrode with the trapezoid shape is about 20° to about 45°.

3. The display panel according to claim 1 , wherein:
one of the at least one first deformation part and the at least one second deformation part includes a protrusion structure, and another one of the first deformation part and the second deformation part includes a recession structure; or
the at least one first deformation part and the at least one second deformation part both include a protrusion structure; or
the at least one first deformation part and the at least one second deformation part both include a recession structure.

4. The display panel according to claim 3 , wherein:
the at least one first deformation part and the at least one second deformation part are disposed oppositely to each other along a direction perpendicular to the extension direction of the at least one bridge electrode; or
the at least one first deformation part and the at least one second deformation part are disposed in a staggered manner along the direction perpendicular to the extension direction of the at least one bridge electrode.

5. The display panel according to claim 1 , wherein edge shapes of orthographic projections of the at least one first deformation part and the at least one second deformation part on the touch control electrode layer are at least one of circles, polygons, arcs, or any combined patterns of circles, polygons, or arcs.

6. The display panel according to claim 5 , wherein:
an edge shape of the orthographic projections of the at least one first deformation part and the at least one second deformation part on the touch control electrode layer are same.

7. The display panel according to claim 1 , wherein a flat part is disposed between two adjacent first deformation parts of the at least one first deformation part and/or between two adjacent second deformation parts of the at least one second deformation part, and an edge tangent of the flat part is parallel to the extending direction of the at least one bridge electrode.

8. The display panel according to claim 1 , wherein:
along the direction perpendicular to the extending direction of the at least one bridge electrode, a maximum width between the first edge and the second edge is a, and a minimum width between the first edge and the second edge is b, wherein a≥b.

9. The display panel according to claim 8 , wherein:
along the extending direction of the at least one bridge electrode, a length of one of the deformation units is c with 10 μm≥c≥5 μm.

10. The display panel according to claim 8 , wherein:
when a>b, the at least one first deformation part and the at least one second deformation part are disposed oppositely along the direction perpendicular to the extending direction of the at least one bridge electrode, wherein 5 μm≥a−b≥0.5 μm.

11. The display panel according to claim 8 , wherein:
when a=b, the at least one first deformation part and the at least one second deformation part are disposed in a staggered manner along the direction perpendicular to the extending direction of the at least one bridge electrode, wherein 10 μm≥a−b≥3.5 μm.

12. The display panel according to claim 10 , wherein:
when flat parts are disposed between two adjacent first deformation parts of the at least one first deformation part and between two adjacent second deformation parts of the at least one second deformation part, and the at least one first deformation part and the at least one second deformation part are disposed oppositely, the maximum width a between the first edge and the second edge is equal to a minimum distance between two flat parts at the first edge and the second edge opposite to each other, and the minimum width b between the first edge and the second edge is equal to a minimum distance between the at least one first deformation part and the at least one second deformation part opposite to each other.

13. The display panel according to claim 11 , wherein:
when flat parts are disposed between two adjacent first deformation parts of the at least one first deformation part and between two adjacent second deformation parts of the at least one second deformation part, and the first deformation parts and the second deformation parts are disposed in a staggered manner, the maximum width a between the first edge and the second edge is equal to a minimum distance between the at least one first deformation part and the flat parts at the second edge, and the minimum width b between the first edge and the second edge is equal to a minimum distance between the at least one second deformation part and the flat parts at the first edge.

14. The display panel according to claim 1 , wherein:
an extension track of the at least one bridge electrode is at least one of a straight line, a curved line, or a zigzag line.

15. The display panel according to claim 14 , wherein:
when the extension track of the bridge electrode is a multi-segment zigzag line, each of the at least one first deformation part and the at least one second deformation part includes at least one edge tangent intersecting an extension direction of a segment of the zigzag line where the at least one first deformation part and the at least one second deformation part are located.

16. A display device comprising a

Assignees

• Wuhan Tianma Micro Electronics Co Ltd
• Wuhan Tianma Microelectronics Co Ltd Shanghai Branch

Inventors

• Wang Qingxia
• Huang Ruiqi

Classifications

• 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

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F2203/04103

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

• G06F3/0446 Primary

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