Flexible touch panel, manufacturing method thereof, and touch device with the same

Patent metadata

Field	Value
Publication number	US-10564755-B2
Application number	US-201816100798-A
Country	US
Kind code	B2
Filing date	Aug 10, 2018
Priority date	Sep 19, 2017
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

A flexible touch panel located on an OLED substrate is provided. The flexible touch panel includes a conductive layer, a first insulation layer, a first electrode layer, a second insulation layer, a second electrode layer, and a protection layer disposed in a serial. The conductive layer is disposed on a packaging layer of the OLED substrate. The first insulation layer and the first electrode layer are stacked on the conductive layer. The first electrode layer, the second insulation layer, and the second electrode layer form a capacitor structure for sensing a touch signal. The conductive layer is utilized for inputting a first voltage signal. The first voltage signal has the conductive layer expelling electric field lines generated by the first electrode layer to shield signal interference between the first electrode layer and a cathode layer of the OLED substrate. A manufacturing method thereof and a touch device are also provided.

First claim

What is claimed is:

1. A flexible touch panel, located on an OLED substrate, wherein the flexible touch panel includes a conductive layer, a first insulation layer, a first electrode layer, a second insulation layer, a second electrode layer, and a protection layer disposed in a serial, the conductive layer is disposed on a packaging layer of the OLED substrate, the first insulation layer and the first electrode layer are stacked on the conductive layer, the first electrode layer, the second insulation layer, and the second electrode layer form a capacitor structure for sensing a touch signal, the protection layer is utilized for covering the second electrode layer, the conductive layer is utilized for inputting a first voltage signal, and the first voltage signal is utilized to have the conductive layer expelling electric field lines generated by the first electrode layer to shield signal interference between the first electrode layer and a cathode layer of the OLED substrate.

2. The flexible touch panel of claim 1 , wherein the conductive layer is bendable to conform flexibility of the flexible touch panel.

3. The flexible touch panel of claim 2 , wherein the conductive layer is selected from a group composed of conductive polymer materials, carbon nanotubes, graphene, silver nanowires, metal mesh, and a combination thereof.

4. The flexible touch panel of claim 3 , wherein a projection area of the conductive layer on the second electrode layer overlaps a projection area of the first electrode layer on the second electrode layer.

5. The flexible touch panel of claim 1 , wherein the flexible touch panel further comprises a chip, the chip includes a first signal end for inputting the first voltage signal, and the conductive layer is electrically connected to the first signal end.

6. The flexible touch panel of claim 5 , wherein the chip further includes a second signal end, the first electrode layer is electrically connected to the second signal end, the second signal end is utilized for inputting a second voltage signal, and a value of the first voltage signal is greater than 0 and is smaller than or equal to a value of the second voltage signal.

7. The flexible touch panel of claim 6 , wherein the flexible touch panel further comprises a non-touch area without touch control capability, the conductive layer includes a first bonding area, the first bonding area is in the non-touch area, and the first bonding area is electrically connected to the first signal end.

8. A manufacturing method of a flexible touch panel, comprising:
providing an OLED substrate, which includes a cathode layer and a packaging layer stacked thereon;
forming a conductive layer on the packaging layer;
forming a first insulation layer on the conductive layer, and patterning the first insulation layer to expose a first bonding area of the conductive layer;
forming a first electrode layer on the first insulation layer, forming a second insulation layer on the first electrode layer, and patterning the first electrode layer and the second insulation layer to expose the first bonding area;
forming a second electrode layer on the second insulation layer, forming a protection layer on the second electrode layer, and patterning the second electrode layer and the protection layer to expose the first bonding area; and
inputting a first voltage signal in the first bonding area, wherein the first voltage signal has the conductive layer generating an electric field to shield signal interference between the cathode layer and the first electrode layer.

9. The manufacturing method of claim 8 , further comprising:
patterning the first electrode layer to form a second bonding area of the first electrode layer;
patterning the second insulation layer to expose the second bonding area;
patterning the second electrode layer to expose the second bonding area;
patterning the protection layer to expose the second bonding area; and
inputting a second voltage signal in the second bonding area, wherein a value of the first voltage signal is greater than 0 and is smaller than or equal to a value of the second voltage signal.

10. A touch device, comprising a flexible touch panel, located on an OLED substrate, wherein the flexible touch panel includes a conductive layer, a first insulation layer, a first electrode layer, a second insulation layer, a second electrode layer, and a protection layer disposed in a serial, the conductive layer is disposed on a packaging layer of the OLED substrate, the first insulation layer and the first electrode layer are stacked on the conductive layer, the first electrode, the second insulation layer, and the second electrode layer form a capacitor structure for sensing a touch signal, the protection layer is utilized for covering the second electrode layer, the conductive layer is utilized for inputting a first voltage signal, and the first voltage signal is utilized to have the conductive layer expelling electric field lines generated by the first electrode layer so as to shield signal interference between the first electrode layer and a cathode layer of the OLED substrate.

11. The touch device of claim 10 , wherein the conductive layer is bendable to conform flexibility of the flexible touch panel.

12. The touch device of claim 11 , wherein the conductive layer is selected from a group composed of conductive polymer materials, carbon nanotubes, graphene, silver nanowires, metal mesh, and a combination thereof.

13. The touch device of claim 12 , wherein a projection area of the conductive layer on the second electrode layer overlaps a projection area of the first electrode layer on the second electrode layer.

14. The touch device of claim 10 , wherein the flexible touch panel further comprises a chip, the chip includes a first signal end for inputting the first voltage signal, and the conductive layer is electrically connected to the first signal end.

15. The touch device of claim 14 , wherein the chip further includes a second signal end, the first electrode layer is electrically connected to the second signal end, the second signal end is utilized for inputting the second voltage signal, a value of the first voltage signal is greater than 0 and is smaller than or equal to a value of the second voltage signal.

16. The touch device of claim 15 , wherein the flexible touch panel further comprises a non-touch area without touch control capability, the conductive layer includes a first bonding area, the first bonding area is in the non-touch area, and the first bonding area is electrically connected to the first signal end.

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Shi Wenjie

Classifications

• G06F2203/04107

  Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F2203/04103

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

• 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

• G06F3/044

  by capacitive means · CPC title