TOUCH PANEL

• US 20080252614A1
• Filed: 04/09/2008
• Published: 10/16/2008
• Est. Priority Date: 04/11/2007
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Matsumoto, Kenichi, Tatehata, Naoki
• Application Number:
  US12/100,282
• Publication Number:
  US 20080252614A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch panel has a lower substrate, an upper substrate, and a polarizing plate. The upper substrate is stacked on the upper surface of the lower substrate, and the polarizing plate is stacked on the upper surface of the upper substrate. Lower conductive layers that are insulated from each other and arranged in a first direction are formed on the upper surface of the lower substrate. Upper conductive layers that are insulated from each other and arranged in the second direction perpendicular to the first direction are formed on the upper surface of the upper substrate.

Claims

1. A touch panel comprising:

a lower substrate having a first surface and a second surface on a back side of the first surface, and having lower conductive layers on the first surface, the lower conductive layers being insulated from each other and arranged in a first direction;

an upper substrate having a third surface and a fourth surface on the back side of the third surface, and having upper conductive layers on the third surface, the upper substrate being stacked on the lower substrate so that the fourth surface faces the first surface, the upper conductive layers being insulated from each other and arranged in a second direction perpendicular to the first direction; and

a polarizing plate stacked on the third surface of the upper substrate.

2. The touch panel according to claim 1, further comprising:

a lower phase plate disposed on the second surface of the lower substrate; and

an upper phase plate disposed between the upper substrate and the polarizing plate.

3. The touch panel according to claim 1, further comprising

an upper phase plate disposed between the upper substrate and the polarizing plate,

wherein the lower substrate is formed of a phase plate.

4. The touch panel according to claim 1, wherein

each of the lower conductive layers is formed by inter-coupling square first conductive sections in the first direction, and first void sections are formed between the lower conductive layers,

each of the upper conductive layers is formed by inter-coupling square second conductive sections in the second direction, and second void sections are formed between the upper conductive layers, and

the upper substrate is stacked on the lower substrate so that the first conductive sections overlap on the second void sections and the second conductive sections overlap on the first void sections.