Touch panel sensor, touch panel device and display device

Patent metadata

Field	Value
Publication number	US-9639219-B2
Application number	US-201314413984-A
Country	US
Kind code	B2
Filing date	Jul 10, 2013
Priority date	Jul 11, 2012
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A touch panel sensor includes a substrate and an electrode having a detection electrode and an extraction electrode connected to a detection electrode. The electrode, in any cross-section thereof in the thickness direction, includes a metal layer which occupies at least part of the cross-section. The metal layer of the detection electrode and the metal layer of the extraction electrode are formed integrally at a joint between the detection electrode and the extraction electrode. The detection electrode includes a conductive mesh having conductive wire arranged in a mesh pattern, the conductive wire having a height of not less than 0.2 μm and not more than 2 μm and a width of not less than 1 μm and not more than 5 μm. The conductive wire of the conductive mesh each have a base surface on the substrate side, and a flat top surface located opposite to the base surface.

First claim

The invention claimed is:

1. A touch panel sensor comprising:
a substrate; and
an electrode provided on the substrate and having a detection electrode for use in positional detection and an extraction electrode connected to the detection electrode,
wherein the electrode, in any cross-section thereof in a thickness direction, includes a metal layer which occupies at least part of the cross-section,
wherein the metal layer of the detection electrode and the metal layer of the extraction electrode are formed integrally at a joint between the detection electrode and the extraction electrode,
wherein the detection electrode includes a conductive mesh having a conductive wire which is arranged in a mesh pattern that defines open areas, the conductive wire having a height of not less than 0.2 μm and not more than 2 μm and a width of not less than 1 μm and not more than 5 μm,
wherein the conductive wire of the conductive mesh have a base surface on the substrate side, a flat top surface located opposite to the base surface, and a pair of side surfaces extending between the base surface and the top surface, and
wherein the conductive wire of the conductive mesh further includes a blackened layer provided on the opposite side of the metal layer from the substrate and forming the top surface.

2. A touch panel sensor comprising:
a substrate; and
an electrode provided on the substrate and having a detection electrode for use in positional detection and an extraction electrode connected to the detection electrode,
wherein the electrode, in any cross-section thereof in a thickness direction, includes a metal layer which occupies at least part of the cross-section,
wherein the metal layer of the detection electrode and the metal layer of the extraction electrode are formed integrally at a joint between the detection electrode and the extraction electrode,
wherein the detection electrode includes a conductive mesh having a conductive wire which is arranged in a mesh pattern that defines open areas, the conductive wire having a height of not less than 0.2 μm and not more than 2 μm and a width of not less than 1 μm and not more than 5 μm,
wherein the conductive wire of the conductive mesh have a base surface on the substrate side, a flat top surface located opposite to the base surface, and a pair of side surfaces extending between the base surface and the top surface, and
wherein the conductive wire of the conductive mesh further includes a blackened layer provided on the substrate side of the metal layer and forming the base surface.

3. The touch panel sensor according to claim 1 ,
wherein the width of the conductive wire of the conductive mesh changes such that it solely decreases in a direction from the top surface toward the base surface.

4. The touch panel sensor according to claim 1 ,
wherein the width of the conductive wire of the conductive mesh first changes such that it solely decreases in a direction from the top surface toward the base surface, and then changes such that it solely increases in a direction from the top surface toward the base surface.

5. The touch panel sensor according to claim 1 ,
wherein the mesh pattern has a large number of boundary segments each extending between two branch points, and the boundary segments define the open areas; and
wherein, in the mesh pattern, the average of the number of boundary segments extending from each branch point is not less than 3.0 and less than 4.0, and there exists no direction in which open areas are arranged at a constant pitch.

6. The touch panel sensor according to claim 5 ,
wherein the average of the number of boundary segments connected at each branch point is more than 3.0.

7. The touch panel sensor according to claim 5 ,
wherein the average of the number of boundary segments connected at each branch point is 3.0.

8. The touch panel sensor according to claim 1 ,
wherein the mesh pattern has a large number of boundary segments each extending between two branch points, and the boundary segments define the open areas, and,
wherein, of the open areas contained in the mesh pattern, those open areas which are surrounded by 6 boundary segments are contained most.

9. The touch panel sensor according to claim 8 ,
wherein the average of the number of boundary segments connected at each branch point is more than 3.0.

10. The touch panel sensor according to claim 8 ,
wherein the average of the number of boundary segments connected at each branch point is 3.0.

11. A touch panel device comprising the touch panel sensor according to claim 1 .

12. A display device comprising the touch panel sensor according to claim 1 .

13. A display device comprising the touch panel device according to claim 11 .

14. The touch panel sensor according to claim 2 ,
wherein the width of the conductive wire of the conductive mesh changes such that it solely decreases in a direction from the top surface toward the base surface.

15. The touch panel sensor according to claim 2 ,
wherein the width of the conductive wire of the conductive mesh first changes such that it solely decreases in a direction from the top surface toward the base surface, and then changes such that it solely increases in a direction from the top surface toward the base surface.

16. The touch panel sensor according to claim 2 ,
wherein the mesh pattern has a large number of boundary segments each extending between two branch points, and the boundary segments define the open areas; and
wherein, in the mesh pattern, the average of the number of boundary segments extending from each branch point is not less than 3.0 and less than 4.0, and there exists no direction in which open areas are arranged at a constant pitch.

17. The touch panel sensor according to claim 2 ,
wherein the mesh pattern has a large number of boundary segments each extending between two branch points, and the boundary segments define the open areas, and,
wherein, of the open areas contained in the mesh pattern, those open areas which are surrounded by 6 boundary segments are contained most.

18. A touch panel device comprising the touch panel sensor according to claim 2 .

Assignees

• Dainippon Printing Co Ltd

Inventors

• Ishii Yasuhiko
• Miyazaki Yuichi
• OOHASHI Youichirou

Classifications

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• G06F2203/04103

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

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G02F1/13338 Primary

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