TOUCH PANEL

• US 20120146942A1
• Filed: 12/12/2011
• Published: 06/14/2012
• Est. Priority Date: 12/14/2010
• Status: Abandoned Application

• Current Assignee: Optrex Corporation (Kyocera Corporation)
• Original Assignee: Optrex Corporation (Kyocera Corporation)
• Inventors: Watanabe, Kiyoshi, KAMOSHIDA, Kenta
• Application Number:
  US13/323,181
• Publication Number:
  US 20120146942A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04111 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 Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A capacitive touch panel has a plurality of first transparent electrodes and a plurality of second transparent electrodes on a transparent substrate. At crossing portions between the first and second electrodes, adjacent electrodes of the second electrodes have no interruption, and adjacent electrodes of the first electrodes are interrupted. An interlayer insulating film is disposed as an upper layer on the second electrodes, and a bridge electrode is disposed as an upper layer on the interlayer insulating film to connect interrupted portions of the first electrodes at the crossing portions. The material constituting the bridge electrode contains an element that is more susceptible to oxidation than elements contained in a material constituting the second electrodes. Constant voltage is applied to the first electrodes, and a pulse voltage having a low potential equal to or higher than the potential of the first electrodes is applied to the second electrodes.

Claims

1. A capacitive touch panel comprising:

a transparent substrate;

a plurality of first transparent electrodes extending in a first direction on one side of the substrate; and

a plurality of second transparent electrodes extending in a second direction crossing the first direction on the one side of the substrate with the first electrodes disposed thereon;

wherein at each of crossing portions between the first electrodes and the second electrodes, adjacent electrodes of the second electrodes have no interruption, adjacent electrodes of the first electrodes are interrupted, and the adjacent electrodes of the first electrodes are connected by a bridge electrode;

wherein at each of the crossing portions, an interlayer insulting film is disposed between the bridge electrode and the second electrodes;

wherein the bridge electrode is constituted by a material containing an element, which is more susceptible to oxidation than the elements contained in a material constituting the second electrodes;

wherein a constant voltage is applied to the first electrodes; and

wherein a pulse voltage is applied to the second electrodes, the pulse voltage having a low potential equal to or higher than the potential of the first electrodes.

2. The touch panel according to claim 1, wherein the bridge electrode is constituted by metal, and the second electrodes is constituted by a material containing at least one substance selected from the group consisting of ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide) and ZnO (Zinc Oxide).

3. A capacitive touch panel comprising:

a transparent substrate;

a plurality of first transparent electrodes extending in a first direction on one side of the substrate; and

a plurality of second transparent electrodes extending in a second direction crossing the first direction on the one side of the substrate with the first electrodes disposed thereon;

wherein at each of crossing portions between the first electrodes and the second electrodes, adjacent electrodes of the first electrodes have no interruption, adjacent electrodes of the second electrodes are interrupted, and the adjacent electrodes of the second electrodes are connected by a bridge electrode;

wherein at each of the crossing portions, an interlayer insulting film is disposed between the bridge electrode and the first electrodes;

wherein the bridge electrode is constituted by a material containing an element, which is more susceptible to oxidation than the elements contained in a material constituting the first electrodes;

wherein a constant voltage is applied to the first electrodes; and

wherein a pulse voltage is applied to the second electrodes, the pulse voltage having a low potential equal to or lower than the potential of the first electrodes.

4. The touch panel according to claim 3, wherein the bridge electrode is constituted by metal, and the first electrodes is constituted by a material containing at least one substance selected from the group consisting of ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide) and ZnO (Zinc Oxide).

5. A capacitive touch panel comprising:

a transparent substrate;

a plurality of first transparent electrodes extending in a first direction on one side of the substrate; and

a plurality of second transparent electrodes extending in a second direction crossing the first direction on the one side of the substrate with the first electrodes disposed thereon;

wherein at each of crossing portions between the first electrodes and the second electrodes, at least an interlayer insulting film is disposed;

wherein adjacent at each of the crossing portions, the electrodes are constituted by the same material;

wherein a constant voltage is applied to the first electrodes; and

wherein a pulse voltage is applied to the second electrodes, the pulse voltage having a low potential equal to the potential of the first electrodes.

6. The touch panel according to claim 5, wherein at each of the crossing portions, adjacent electrodes of the second electrodes have no interruption, adjacent electrodes of the first electrodes are interrupted, and the adjacent electrodes of the first electrodes are connected by a bridge electrode.

7. The touch panel according to claim 6, wherein the bridge electrode and the second electrodes are constituted by a material containing at least one substance selected from the group consisting of ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide) and ZnO (Zinc Oxide).