Capacitive input device having a curved surface

Patent metadata

Field	Value
Publication number	US-10191602-B2
Application number	US-201615042435-A
Country	US
Kind code	B2
Filing date	Feb 12, 2016
Priority date	Aug 23, 2013
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

A capacitive input device having a curved surface shape includes: an external body molded with a synthetic resin, the external body having an external curved surface facing a user; a film base, which is integrally provided so as to conform to the internal curved surface of the external body; a conductive layer made of conductive macromolecules, the conductive layer being formed on an opposite surface of the film base, the opposite surface being opposite to a bonded surface, of the film base, that is bonded to the external body; and wiring layers that are electrically connected to the conductive layer.

First claim

What is claimed is:

1. A capacitive input device having a curved surface shape, the capacitive input device comprising:
an external body molded with a synthetic resin, the external body having an external curved surface facing a user;
a film base, which is integrally provided so as to conform to an internal curved surface of the external body;
an adhesive layer provided between the internal curved surface of the external body and the film base;
a conductive layer made of a conductive macromolecule, the conductive layer being disposed on an opposite surface of the film base, the opposite surface being opposite to a surface of the film base on the external body side;
a wiring layer that is disposed to overlap a part of the conductive layer and is electrically connected to the conductive layer; and
a protective layer that is disposed to cover an opposite surface of the conductive layer and is made of a material that comprises an insulative synthetic resin, the protective layer being thinner than the film base, the opposite surface of the conductive layer being opposite to a surface that is on the film base.

2. The capacitive input device according to claim 1 , wherein the conductive macromolecule comprises a mixture of poly (3, 4-ethylenedioxythiophene) (PEDOT) and polystyrene sulfonate (PSS).

3. The capacitive input device according to claim 1 , wherein the external body, the film base, and the conductive layer are transparent, and wherein a decorative layer is provided on a surface of the film base toward the external body.

Assignees

• Alps Electric Co Ltd

Inventors

• Kiyoshi Tsutomu
• Oizumi Mitsuo
• Takahashi Hidekazu

Classifications

• H03K17/962 Primary

  Capacitive touch switches · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• H01H2215/006

  Only mechanical function · CPC title

• C09D181/08

  Polysulfonates · CPC title

• C09D5/24

  Electrically-conducting paints {(conductive materials H01B1/00)} · CPC title