Flexible touch display panel and flexible touch display device

Patent metadata

Field	Value
Publication number	US-10401998-B2
Application number	US-201715726252-A
Country	US
Kind code	B2
Filing date	Oct 5, 2017
Priority date	Mar 27, 2017
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

A flexible touch display panel is provided, including: a flexible substrate, a driver layer, a light-emitting layer, an encapsulation layer, a touch layer. The touch layer is disposed on the encapsulation layer and includes a plurality of first/second touch electrodes disposed on one side, facing away from the flexible substrate, of the encapsulation layer and on a same layer. Each first touch electrode includes a plurality of first touch electrode blocks and first junctions for joining two adjacent first touch electrode blocks. Each second touch electrode includes a plurality of second touch electrode blocks and second junctions for joining two adjacent second touch electrode blocks. Each first junction and an associated second junction overlay in a direction perpendicular to the flexible substrate. The first/second touch electrodes are made of a conductive polymer material and formed by ink-jet printing or coating.

First claim

What is claimed is:

1. A flexible touch display panel, comprising:
a flexible substrate;
a driver layer, wherein the driver layer is disposed on the flexible substrate and comprises a plurality of thin film transistors;
a light-emitting layer, wherein the light-emitting layer is disposed on the driver layer and comprises a plurality of light-emitting units, wherein each of the plurality of light-emitting units is associated with more than one of the plurality of thin film transistors, and is controlled to emit light by more than one of the plurality of thin film transistors;
an encapsulation layer, disposed on the light-emitting layer to encapsulate the light-emitting layer; and
a touch layer, disposed on the encapsulation layer, wherein the touch layer comprises a plurality of first touch electrodes and a plurality of second touch electrodes disposed on one side, facing away from the flexible substrate, of the encapsulation layer, wherein the plurality of first touch electrodes and the plurality of second touch electrodes are disposed on a same layer,
wherein the plurality of first touch electrodes each comprise a plurality of first touch electrode blocks and a plurality of first junctions for joining two adjacent first touch electrode blocks; wherein the plurality of first touch electrodes each are strip-like and extend in a first direction, and the plurality of first touch electrodes are arranged in parallel along a second direction;
wherein the plurality of second touch electrodes each comprise a plurality of second touch electrode blocks and a plurality of second junctions for joining two adjacent second touch electrode blocks, wherein the plurality of second touch electrodes each are strip-like and extend in the second direction, and the plurality of second touch electrodes are arranged in parallel along the first direction, wherein the first direction intersects the second direction; and
wherein the plurality of first junctions each and one of the plurality of second junctions overlay in a direction perpendicular to the flexible substrate, wherein said first junction and said second junction are insulated from each other by one of a plurality of insulating pieces of an insulating layer disposed in the touch layer;
wherein the plurality of first touch electrodes and the plurality of second touch electrodes consist of a conductive polymer material formed by ink-jet printing or coating,
wherein the conductive polymer material is either a composite of silver nanowires and PEDOT:PSS or a composite of carbon nanowires and PEDOT:PSS; and
wherein a mass percent of silver nanowires or carbon nanowires in the conductive polymer material is x % and a mass percent of PEDOT:PSS is (100−x)%, wherein x=0.1˜60.

2. The flexible touch display panel according to claim 1 , wherein the plurality of first touch electrodes and the plurality of second touch electrodes are disposed directly on a surface of the side, facing away from the flexible substrate, of the encapsulation layer, the plurality of first junctions are disposed directly on the side, facing away from the flexible substrate, of the encapsulation layer, each of the plurality of insulating pieces is disposed on and covers one of the plurality of first junctions, and each of the plurality of second junctions is disposed on and covers one of the plurality of insulating pieces.

3. The flexible touch display panel according to claim 2 , wherein a linewidth in the second direction of the plurality of first junctions each is a, and a linewidth of the insulating piece is b, wherein a and b are both greater than 1 micron and b is greater than a.

4. The flexible touch display panel according to claim 1 , wherein the plurality of first touch electrodes and the plurality of second touch electrodes are disposed directly on the side, facing away from the flexible substrate, of the encapsulation layer, the plurality of second junctions are disposed directly on the side, facing away from the flexible substrate, of the encapsulation layer, each of the plurality of insulating pieces is disposed on and at least partially covers one of the plurality of second junctions, and each of the plurality of first junctions is disposed on one side, facing away from the plurality of second junctions, of one of the plurality of insulating pieces.

5. The flexible touch display panel according to claim 4 , wherein the plurality of second touch electrode blocks each is disposed at least partially directly on one of the plurality of second junctions at a position where the second touch electrode block connects the second junction, an included angle between the encapsulation layer and a contact surface between each of the plurality of second touch electrode blocks and one of the plurality of second junctions is a first contact angle, an included angle between a side surface, facing away from each of the plurality of second junctions, of an end of one of the plurality of insulating pieces and the plurality of second junctions is a second contact angle, and an included angle between a side surface, facing away from the plurality of second junctions, of an end, in the second direction, of one of the plurality of first junctions and the plurality of insulating pieces is a third contact angle, wherein the third contact angle is greater than the second contact angle and the second contact angle is greater than the first contact angle.

6. The flexible touch display panel according to claim 5 , wherein the third contact angle, the second contact angle and the first contact angle are in a range from 5° to 90°, including endpoints.

7. The flexible touch display panel according to claim 1 , wherein shapes of the plurality of first touch electrode blocks and the plurality of second touch electrode blocks are rhombus, squares, circles, triangles or rectangles.

8. The flexible touch display panel according to claim 1 , wherein a thickness of the touch layer is 10 nm˜400 nm.

9. The flexible touch display panel according to claim 1 , wherein the driver layer comprises a plurality of data lines and a plurality of gate scanning lines, wherein the plurality of data lines extend in the first direction and are arranged in parallel along the second direction, and the plurality of gate scanning lines extend in the second direction and are arranged in parallel along the first direction.

10. The flexible touch display panel according to claim 1 , further comprising a thin film covering layer arranged to cover the touch layer.

11. The flexible touch display panel according to claim 10 , further comprising a polarizer layer, wherein the polarizer layer is disposed on one side, facing away from the touch layer, of the thin film covering layer.

12. A method for manufacturing a flexible touch display panel, comprising:
forming a flexible substrate;
forming a driver layer having a plurality of thin film transistors on the flexible substrate;
forming a light-emitting layer having a plurality of light-emitting units on one side, facing away from the flexible substrate, of the driver layer, wherein the plurality of light-emitting units each are associated with more than one of the plurality of thin film transistors, and are controlled to emit light by the more than one of the plurality of thin film transistors;
forming an encapsulation layer on one side, facing away from the flexible substrate, of the light-emitting layer, wherein the encapsulation layer is arranged to encapsulate the light-emitting layer; and
forming a touch layer on one side, facing away from the flexible substrate, of the encapsulation layer by ink-jet printing or coating, wherein the touch layer comprises a plurality of first t

Assignees

• Shanghai Tianma Am Oled Co Ltd

Inventors

• Jin Jian
• Su Congyi

Classifications

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F2203/04103

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

• G02F1/13338

  Input devices, e.g. touch panels · CPC title