Complementary touch panel electrodes

Patent metadata

Field	Value
Publication number	US-2016004358-A1
Application number	US-201514852978-A
Country	US
Kind code	A1
Filing date	Sep 14, 2015
Priority date	Nov 30, 2012
Publication date	Jan 7, 2016
Grant date	—

Abstract

A multi-layer touch panel having an upper and a lower electrode that cross over one another. The electrode pattern for either electrode at the cross over area is complementary to the other electrode at the cross over area.

First claim

1 . A touch sensor comprising first and second electrodes each comprising interconnected mesh of conductive traces, the first and second electrodes crossing over one another in a cross-over area, the first and second electrodes having variable mesh densities in the cross-over area complementary to one another.

2 . The touch sensor of claim 1 further comprising a dielectric layer disposed between the first and second electrodes.

3 . The touch sensor of claim 1 , wherein the conductive traces in each of the first and second electrodes form a random network of conductive traces.

4 . The touch sensor of claim 1 , wherein the conductive traces in each of the first and second electrodes form a pseudo-random network of conductive traces.

5 . The touch sensor of claim 1 , wherein the conductive traces in each of the first and second electrodes form a regular network of conductive traces.

6 . The touch sensor of claim 1 , wherein the conductive traces in each of the first and second electrodes comprises silver.

7 . The touch sensor of claim 1 , wherein the conductive traces in each of the first and second electrodes are curved.

8 . The touch sensor of claim 1 , wherein the conductive traces in each of the first and second electrodes are straight.

9 . A touch sensor comprising first and second electrodes each comprising interconnected mesh of conductive traces, the first and second electrodes crossing over one another in a cross-over area, wherein in the cross-over area:
a first region of the first electrode having higher mesh density overlays a first region of the second electrode having lower mesh density; a second region of the first electrode having lower mesh density overlays a second region of the second electrode having higher mesh density; and a third region of the first electrode overlays a third region of the second electrode, the two third regions having equal mesh densities.

10 . A touch sensor comprising first and second electrodes each comprising interconnected mesh of conductive traces, the first and second electrodes crossing over one another in a cross-over area, the first electrode having a uniform mesh density in the cross-over area, the second electrode having a variable mesh density in the cross-over area.

Assignees

• 3M Innovative Properties Co

Inventors

• Frey Matthew H

Classifications

• 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

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• 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

• G06F3/047

  using sets of wires, e.g. crossed wires · CPC title