TOUCH PANEL AND INPUT DEVICE USING THE SAME

• US 20090091549A1
• Filed: 10/06/2008
• Published: 04/09/2009
• Est. Priority Date: 10/09/2007
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Matsumoto, Kenichi, Tanabe, Koji
• Application Number:
  US12/245,953
• Publication Number:
  US 20090091549A1
• 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: Y10T 428/24058 including grain, strips, or filamentary elements in respective layers or components in angular relation

Abstract

A touch panel includes multiple belt-like upper conductive layers and lower conductive layers formed in an orthogonal direction to the upper conductive layers. Those two kinds of layers are formed on a light transmissible substrate. A strong adhesion layer and a weak adhesion layer are layered together on a top face or an underside of the light transmissible substrate. The presence of the weak adhesion layer allows peeling off the touch panel from a cover of an apparatus fairly easier when the touch panel needs to be retrofitted to the cover. Since the weak adhesion layer is peeled off together with the strong adhesion layer, it will not be transferred or attached onto the cover. No time or labor is thus needed for removing the layer transferred or attached to the cover. The touch panel capable of being retrofitted with ease is thus obtainable.

Claims

1. A touch panel comprising:

a light transmissible substrate having a plurality of belt-shaped upper conductive layers and a plurality of belt-shaped lower conductive layers in an orthogonal direction each other; and

a strong adhesion layer and a weak adhesion layer having weaker adhesive force than that of the strong adhesion layer formed on one of a top face and an underside of the light transmissible substrate in piles.

2. The touch panel of claim 1, wherein the weak adhesion layer is made from thermoplastic elastomer.

3. An input device comprising:

a touch panel including;

a light transmissible substrate having a plurality of belt-shaped upper conductive layers and a plurality of belt-shaped lower conductive layers in an orthogonal direction each other;

a strong adhesion layer and a weak adhesion layer having weaker adhesive force than that of the strong adhesion layer formed on one of a top face and an underside of the light transmissible substrate in piles;

a light transmissible cover including the touch panel bonded to an underside of the light transmissible cover; and

a display element disposed under the touch panel.

4. The input device of claim 3, wherein the weak adhesion layer is made from thermoplastic elastomer.