Touch panel

• US 20060043374A1
• Filed: 08/26/2005
• Published: 03/02/2006
• Est. Priority Date: 08/31/2004
• Status: Active Grant

• Current Assignee: Shoei Co Ltd
• Original Assignee: Shoei Co Ltd
• Inventors: Fujita, Yuzuru, Horikawa, Satoru
• Granted Patent: US 7,609,252 B2
• Time in Patent Office: Days
• US Class Current: 257/72
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

In a touch panel, upper and lower electrode connecting portions are provided in the vicinity of a sealing agent formed above extending electrodes, and the upper and lower electrode connecting portions are connected so as to overlap each other. Accordingly, a gap between a height of the overlap of the upper and lower electrode connecting portions and a height of the sealing agent is relaxed. In this way, it is possible to reduce occurrence of cracks on the touch panel upon pressurizing upper and lower substrates.

Claims

1. A touch panel having:

an upper substrate provided with a transparent conductive film and an upper position detection electrode on one surface thereof, and

a lower substrate provided with a transparent conductive film, a lower position detection electrode, upper and lower electrode connecting portions, and an extending electrode on one surface thereof,

the upper substrate and the lower substrate being bonded together, with a sealing agent interposed therebetween, while disposing the transparent conductive film of the upper substrate and the transparent conductive film of the lower substrate to face each other, wherein

the upper and lower electrode connecting portions are formed in the vicinity of a portion of the extending electrode where the sealing agent is formed, and

a difference becomes less obvious between a thickness of the upper and lower electrode connecting portions and a thickness of an overlap of the extending electrode and the sealing agent, the upper position detection electrode of the upper substrate and the extending electrode of the lower substrate being connected together so as to overlap in a pressing direction of the upper substrate with a conductive adhesive in the upper and lower electrode connecting portions.

2. The touch panel according to claim 1, wherein a formation width of the upper position detection electrode of the upper substrate is substantially equal to a formation width of the extending electrode of the lower substrate.

3. The touch panel according to claim 1, wherein the extending electrode is located substantially in the center of the lower substrate.

4. The touch panel according to claim 1, wherein a grain size of filler contained in a material of the extending electrode is greater than a grain size of filler contained in the sealing agent.