Touch Screen, Touch Panel, Display, and Electronic Apparatus

Patent metadata

Field	Value
Publication number	US-2016334933-A1
Application number	US-201615099627-A
Country	US
Kind code	A1
Filing date	Apr 15, 2016
Priority date	May 13, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

A touch screen includes a column-direction wire and a row-direction wire. The column-direction wire and the row-direction wire three-dimensionally intersect each other in a region that is a detection cell. At least one of the column-direction wire and the row-direction wire has an end portion whose width is larger than a width of another portion of the wire, the end portion being a wire-end expansion portion. The wire-end expansion portion is provided so as to be located outside an edge of an outermost column-direction wire and an outermost row-direction wire that are disposed on the outermost side of a detectable area formed of a plurality of the column-direction wires and a plurality of the row-direction wires. The column-direction wire and the row-direction wire each have a mesh structure in which a plurality of conductor wires are disposed in a mesh pattern. The wire-end expansion portion has the mesh structure.

First claim

What is claimed is:

1 . A touch screen, comprising:
a column-direction wire extending in a column direction; and a row-direction wire extending in a row direction orthogonal to said column direction, said column-direction wire and said row-direction wire three-dimensionally intersecting each other in a region that is a detection cell, wherein at least one of said column-direction wire and said row-direction wire has an end portion whose width is larger than a width of another portion of the wire, said end portion being a wire-end expansion portion, said wire-end expansion portion is provided so as to be located outside an edge of an outermost column-direction wire and an outermost row-direction wire that are disposed on the outermost side of a detectable area formed of a plurality of said column-direction wires and a plurality of said row-direction wires, said column-direction wire and said row-direction wire each have a mesh structure in which a plurality of conductor wires are disposed in a mesh pattern, and said wire-end expansion portion has said mesh structure.

2 . The touch screen according to claim 1 , further comprising a floating electrode that is provided so as to surround each of said column-direction wire and said row-direction wire in plan view, is electrically insulated from said column-direction wire and said row-direction wire, and has a potential in a floating state,
wherein said floating electrode has said mesh structure and is also provided so as to surround said wire-end expansion portion in plan view.

3 . The touch screen according to claim 1 , wherein
said column-direction wire and said row-direction wire each have a maximum width set to be smaller than a corresponding arrangement interval of said column-direction wire and said row-direction wire in said detectable area, and said wire-end expansion portion has a width set to be larger than said maximum width of said column-direction wire and said maximum width of said row-direction wire.

4 . The touch screen according to claim 1 , wherein
said column-direction wire and said row-direction wire respectively have a column-direction-wire expansion portion and a row-direction-wire expansion portion that are formed by partially expanding widths of said column-direction wire and said row-direction wire in said detection cell, said column-direction-wire expansion portion and said row-direction-wire extension portion are provided in a portion except for the portion in which said column-direction wire and said row-direction wire three-dimensionally intersect each other, said column-direction-wire expansion portion and said row-direction-wire expansion portion have a first interval therebetween, said column-direction-wire expansion portion and said row-direction wire has a second interval therebetween, and in said detectable area, said first interval and said second interval are set to be greater in said detection cell formed of said outermost column-direction wire and said detection cell formed of said outermost row-direction wire than those in said detection cell in another portion.

5 . The touch screen according to claim 1 , wherein
said mesh structure is formed of first conductor wires and second conductor wires that repeatedly intersect each other, said first conductor wires extending in a first direction at an angle of 45° with respect to said column direction or said row direction, said second conductor wires extending in a second direction opposite to the first direction at an angle of 45° with respect to said column direction or said row direction, and a repeated interval of the mesh in said row direction and a repeated interval of the mesh in said column direction are set to be the same.

6 . The touch screen according to claim 1 , wherein said wire-end expansion portion comprises the same material as that for said column-direction wire and said row-direction wire.

7 . A touch panel, comprising:
the touch screen according to claim 1 ; and a touch position detection circuit detecting a position indicated by an indicator on said touch screen based on capacitance between said indicator indicating said touch screen and said row-direction wire and said column-direction wire.

8 . A display, comprising:
the touch panel according to claim 7 ; and a display module that is disposed opposite to the side from which said touch screen of said touch panel is indicated and is capable of displaying information.

9 . An electronic apparatus, comprising:
the touch panel according to claim 7 ; and an electronic processing unit electrically performing predetermined processing on information of said position detected by said touch position detection circuit of said touch panel.

Assignees

• Mitsubishi Electric Corp

Inventors

• Ono Takeshi
• Nakamura Tatsuya

Classifications

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• G06F3/0418 Primary

  for error correction or compensation, e.g. based on parallax, calibration or alignment · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/0445

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title