TOUCH INPUT FUNCTION-EQUIPPED PROTECTION PANEL FOR ELECTRONIC DEVICE DISPLAY WINDOW

• US 20100090978A1
• Filed: 11/01/2007
• Published: 04/15/2010
• Est. Priority Date: 11/02/2006
• Status: Active Grant

• Current Assignee: Nissha Printing Company Limited
• Original Assignee: Nissha Printing Company Limited
• Inventors: Nishikawa, Kazuhiro, Kai, Yoshihiro, Nakamura, Kazuto
• Granted Patent: US 8,077,264 B2
• 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
• CPC Class Codes: H01H 2207/01 from bottom to top layer
• CPC Class Codes: H01H 2207/014 Plated through holes
• CPC Class Codes: H01R 4/04 using electrically conductive adhesives

Abstract

A touch input function-equipped protection panel for an electronic device display window which can suppress deterioration of electric properties and appearance quality in a lead wire connection part, includes a touch panel having a flexible upper electrode plate and an inflexible lower electrode plate arranged face-to-face at a prescribed gap in a manner that the electrode surfaces are directed to inside and being formed by sticking the outer circumferential parts of the respective electrode plates with an insulating adhesive layer interposed therebetween; a decorative film having a transparent window part and stuck to the surface of the upper electrode plate; and a pin-equipped lead wire for extracting an electric signal from an electrode terminal of the electrode plate through respective metal pins inserted into a plurality of through holes formed on the lower electrode plate, wherein an elastomeric binder-containing conductive adhesive layer is formed on the electrode terminal of at least one of the upper electrode plate and the lower electrode plate as an underlayer of a conductive adhesive to be injected into the respective through holes.

Claims

1. A touch input function-equipped protection panel for an electronic device display window, comprising a touch panel having a flexible upper electrode plate and an inflexible lower electrode plate arranged face-to-face at a prescribed gap in a manner that the electrode surfaces are directed to inside and being formed by sticking the outer circumferential parts of the respective electrode plates with an insulating adhesive layer interposed therebetween;

a decorative film having a transparent window part and stuck to the surface of said upper electrode plate, and a pin-equipped lead wire for extracting an electric signal from an electrode terminal of said electrode plate through respective metal pins inserted into a plurality of through holes formed on said lower electrode plate, wherein

an elastomeric binder-containing conductive adhesive layer is formed on the electrode terminal of at least one of said upper electrode plate and said lower electrode plate as an underlayer of a conductive adhesive to be injected into the respective through holes.

2. The touch input function-equipped protection panel for an electronic device display window according to claim 1, wherein the binder of the conductive adhesive to be inserted into said through holes is obtained by adding a conductive filler to an adhesive containing one of silicon, epoxy, acrylic, and urethane resins as a binder.

3. The touch input function-equipped protection panel for an electronic device display window according to claim 1, wherein said elastomeric binder is a natural rubber or synthetic rubber such as styrene-butadiene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, chloroprene rubber, isoprene rubber, butyl rubber, butadiene rubber, chlorosulfonated polyethylene and styrene thermoplastic elastomer.

4. The touch input function-equipped protection panel for an electronic device display window according to claim 1, wherein said elastomeric binder is chloroprene rubber.

5. The touch input function-equipped protection panel for an electronic device display window according to claim 1, wherein said elastomeric binder is a blend of chloroprene rubber and a phenol resin.

6. The touch input function-equipped protection panel for an electronic device display window according to claim 1, wherein a content of the conductive filler contained as a conductive material in said elastomeric binder is 0.5 to 90 parts by weight based on 100 parts by weight of the elastomeric binder.

7. The touch input function-equipped protection panel for an electronic device display window according to claim 1, wherein a surface area of said elastomeric binder-containing conductive adhesive layer is 10 to 100% to a surface area of the electrode terminal of said upper electrode plate.

8. The touch input function-equipped protection panel for an electronic device display window according to claim 1, wherein a thickness of said elastomeric binder-containing conductive adhesive layer is 10 to 90% of a particle diameter of the conductive filler contained as the conductive material.

9. The touch input function-equipped protection panel for an electronic device display window according to claim 2, wherein said elastomeric binder is a natural rubber or synthetic rubber such as styrene-butadiene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, chloroprene rubber, isoprene rubber, butyl rubber, butadiene rubber, chlorosulfonated polyethylene and styrene thermoplastic elastomer.

10. The touch input function-equipped protection panel for an electronic device display window according to claim 2, wherein said elastomeric binder is chloroprene rubber.

11. The touch input function-equipped protection panel for an electronic device display window according to claim 2, wherein said elastomeric binder is a blend of chloroprene rubber and a phenol resin.