TOUCH PANEL

• US 20110063240A1
• Filed: 09/16/2010
• Published: 03/17/2011
• Est. Priority Date: 09/17/2009
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: TANABE, Koji
• Application Number:
  US12/883,722
• Publication Number:
  US 20110063240A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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 touch panel includes a plurality of belt-shaped upper electrodes extending from a plurality of upper conductive layers in the perpendicular direction thereto. The upper electrodes are formed of a copper foil, and thereby it is possible to form the upper electrodes which realize thinned line or narrowed line interval without spread or scratch, by using an etching process or the like. The overall miniaturization or increase in an operation region cannot only be implemented, but stable connection to electronic circuits of a device can be also performed, thereby obtaining the touch panel which can be reliably operated.

Claims

1. A touch panel comprising:

an upper substrate;

a lower substrate opposite to the upper substrate with a predetermined gap therebetween;

a plurality of belt-shaped upper conductive layers formed on the upper substrate and arranged in a predetermined direction;

a plurality of upper electrodes having one ends connected to end portions of the upper conductive layers and the other ends extending to an outer circumference of the upper substrate;

a plurality of stripe-shaped lower conductive layers formed on the lower substrate and arranged in a direction perpendicular to the upper conductive layers with a predetermined gap between the lower conductive layers and the upper conductive layers; and

a plurality of lower electrodes having one ends connected to end portions of the lower conductive layers and the other ends extending to an outer circumference of the lower substrate,

wherein at least one of the upper electrodes and the lower electrodes is formed of a copper foil.

2. The touch panel of claim 1, wherein at least one of the upper conductive layers and the lower conductive layers is formed of ultraviolet curable resin in which conductive metal thin lines are dispersed.

3. The touch panel of claim 1, wherein the upper electrodes are formed in a direction perpendicular to the upper conductive layers, and

wherein the lower electrodes are formed in a direction parallel to the lower conductive layers.

4. The touch panel of claim 1, wherein the upper electrodes are formed at end portions in a side to which the upper conductive layers extend on the upper substrate, and

wherein the lower electrodes are formed at end portions in a side to which the lower conductive layers extend on the lower substrate.

5. The touch panel of claim 1, wherein the upper conductive layers and the lower conductive layers are formed by connecting a plurality of rectangular portions to each other in a belt shape.