Panel-type input device with conductive coat formed from conducting polymer

Patent metadata

Field	Value
Publication number	US-9710115-B2
Application number	US-201414469126-A
Country	US
Kind code	B2
Filing date	Aug 26, 2014
Priority date	Feb 8, 2008
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

A panel-type input device including a pair of electrode plates, each electrode plate having a substrate and a conductive coat provided on a surface of the substrate, the conductive coat of each electrode plate being formed from a conducting polymer. The conductive coat of each electrode plate includes a detecting area adapted to detect a touch input and an inoperative area disposed adjacent to the detecting area, the inoperative area having a surface resistivity higher than a surface resistivity of the detecting area. A parallel electrode pair adapted to apply a voltage to the conductive coat is formed in the detecting area, and conductors connected to the parallel electrode pair are formed in the inoperative area. The inoperative area insulates the conductors from the detecting area.

First claim

The invention claimed is:

1. A panel-type input device comprising:
a pair of electrode plates, each electrode plate having
a substrate, and
a conductive coat provided on a surface of said substrate, said conductive coat being formed from a conducting polymer and having a plurality of detecting areas configured to detect a touch input and an inoperative area disposed adjacent to said plurality of detecting areas and configured not to detect the touch input, said inoperative area having a first surface resistivity higher than a second surface resistivity of said plurality of detecting areas and insulating said plurality of detecting areas from each other,

wherein said pair of electrode plates are assembled with each other in a relative arrangement such that conductive coats of said electrode plates are facing and spaced from each other while permitting a conductive contact between opposing detecting areas facing each other, the touch input being detected due to the conductive contact between the opposing detecting areas, and
wherein said plurality of detecting areas provided on a first one of the electrode plates extend parallel to each other in a first linear direction, and said plurality of detecting areas provided on a second one of the electrode plates extend parallel to each other in a second linear direction intersecting the first linear direction.

2. The panel-type input device of claim 1 , wherein said conducting polymer forming said conductive coat contains an additive adapted to be denatured into either one of an oxidizing substance and a basic substance by ultraviolet light irradiation.

3. The panel-type input device of claim 1 , wherein said pair of electrode plates are transparent.

4. An electronic apparatus comprising:
a display unit; and
the panel-type input device of claim 3 , said panel-type input device being mounted on a screen of said display unit.

5. A panel-type input device comprising:
a pair of conductive coats disposed oppositely to and insulated from each other, each conductive coat being formed from a conducting polymer;
wherein said each conductive coat comprises a plurality of detecting areas configured to detect a touch input and an inoperative area disposed adjacent to said plurality of detecting areas and configured not to detect the touch input, said inoperative area having a surface resistivity higher than a surface resistivity of said plurality of detecting areas and insulating said plurality of detecting areas from each other; and
wherein said plurality of detecting areas provided on a first one of the conductive coats extend parallel to each other in a first linear direction, and said plurality of detecting areas provided on a second one of the conductive coats extend parallel to each other in a second linear direction intersecting the first line linear direction.

6. The panel-type input device of claim 5 , wherein said pair of conductive coats are provided on mutually opposing surfaces of a pair of substrates disposed oppositely to each other; and wherein an insulating layer is interposed between said pair of conductive coats.

7. The panel-type input device of claim 6 , wherein an auxiliary conductive layer formed from an inorganic conducting substance is provided between said plurality of detecting areas of each of said pair of conductive coats and each of said mutually opposing surfaces of said substrates.

8. The panel-type input device of claim 5 , wherein said pair of conductive coats are provided on opposite surfaces of a single substrate.

9. The panel-type input device of claim 8 , wherein an auxiliary conductive layer formed from an inorganic conducting substance is provided between said plurality of detecting areas of said pair of conductive coats and said opposite surfaces of said single substrate.

10. The panel-type input device of claim 5 , wherein said conducting polymer forming said conductive coat contains an additive adapted to be denatured into either one of an oxidizing substance and a basic substance by ultraviolet light irradiation.

11. The panel-type input device of claim 5 , wherein said pair of conductive coats are transparent.

12. An electronic apparatus comprising:
a display unit; and
the panel-type input device of claim 11 , said panel-type input device being mounted on a screen of said display unit.

Assignees

• Fujitsu Component Ltd
• Fujitsu Ltd

Inventors

• Endo Michiko
• Iwata Hideki
• Takei Fumio
• Kashikawa Takahiro

Classifications

• G01N27/22

  by investigating capacitance · CPC title

• Y10T29/49204

  Contact or terminal manufacturing · CPC title

• H01L2924/0002

  Electricity · mapped topic

• G06F3/044 Primary

  by capacitive means · CPC title

• H01L2924/00

  Electricity · mapped topic