Touch screen, touch panel, display, and electronic equipment

Patent metadata

Field	Value
Publication number	US-9760229-B2
Application number	US-201514800278-A
Country	US
Kind code	B2
Filing date	Jul 15, 2015
Priority date	Aug 11, 2014
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A touch screen according to the present invention includes: a transparent substrate; a plurality of row-direction wirings and a plurality of column-direction wirings provided on the transparent substrate, the row-direction wirings and the column-direction wirings intersecting via an inter-layer insulating film with each other in a stereoscopic view; a plurality of lead-out wirings each provided to be electrically extended from each of first ends of the said row-direction wirings and the column-direction wirings; and a shield wiring provided to surround in a planar view the row-direction wirings, the column-direction wirings, and the lead-out wirings, wherein the row-direction wirings, the column-direction wirings, and the shield wiring have comb-teeth parts which are formed to have comb-teeth shapes such that distances from the shield wiring to the row-direction wirings and the column-direction wirings are small at predetermined parts.

First claim

What is claimed is:

1. A touch screen comprising:
a substrate;
a plurality of row-direction wirings and a plurality of column-direction wirings both provided on said substrate such that said row-direction wirings and said column-direction wirings cross in a stereoscopic view each other via an insulating film therebetween;
a plurality of lead-out wirings each provided to be electrically extended from each of first ends of said row-direction wirings and said column-direction wirings; and
a first shield wiring provided to surround in a planar view said row-direction wirings, said column-direction wirings, and said lead-out wirings,
wherein each of said row-direction wirings, each of said column-direction wirings, and said first shield wiring include comb-teeth parts formed to have comb-teeth shapes such that distances from said first shield wiring to said row-direction wiring and said column-direction wiring are small at predetermined parts,
said comb-teeth parts are formed on a second end, of each of said row-direction wirings, on a second end of each of said column-direction wirings, and are formed on said first shield wiring,
said comb-teeth parts formed on said second ends of each of said row-direction wirings and on each of said column-direction wirings and said comb-teeth parts formed on said first shield wiring are disposed to face each other in a planar view, and
said comb-teeth parts formed on said second end of each of said row-direction wirings and on said second end of each of said column-direction wirings and said comb-teeth parts formed on said first shield wiring have therebetween capacitances of 1 pF or more.

2. The touch screen of claim 1 , further comprising:
a second shield wiring branched off from said first shield wiring and disposed along said first ends of said row-direction wirings;
wherein one column-direction wiring which is of said column-direction wirings and is disposed closest to said first ends of said row-direction wirings further comprises a plurality of extension parts which are extendingly provided alternately, in a planar view, with said first ends of said row-direction wirings, and
said second shield wiring and each of said extension parts each include comb-teeth parts formed to have a comb-teeth shape such that mutual distances between said second shield wiring and said extension part are small.

3. The touch screen of claim 2 , wherein said comb-teeth parts are formed on a side, of each of said extension parts, facing said second shield wiring, and are formed on said second shield wiring, and
said comb-teeth parts formed on said side, of each of said extension parts, facing said second shield wiring and said comb-teeth parts formed on said second shield wiring are disposed to face each other in a planar view.

4. The touch screen of claim 3 , wherein said comb-teeth parts formed on said side, of each of said extension parts, facing said second shield wiring and said comb-teeth parts formed on said second shield wiring are disposed alternately with and apart from each other in a planar view.

5. The touch screen of claim 2 , wherein said comb-teeth parts formed on said side, of each of said extension parts, facing said second shield wiring and each of said comb-teeth parts formed on said second shield wiring have therebetween a capacitance of 1 pF or more.

6. The touch screen of claim 1 , wherein said comb-teeth parts formed on said second end of each of said row-direction wirings and on said second end on each of said column-direction wirings and said comb-teeth parts formed on said first shield wiring are disposed alternately and apart from each other in a planar view.

7. The touch screen of claim 1 , wherein longer wirings of said row-direction wirings and said column-direction wirings are formed on a layer different from a layer on which said first shield wiring is formed, and said comb-teeth parts formed on said second ends of said longer wirings and said comb-teeth parts formed on said first shield wiring overlap each other in a planar view.

8. A touch panel comprising:
a touch screen of claim 1 ; and
a touch-position detection circuit configured to detect a position, on said touch screen, pointed by a pointing body, based on a capacitance between said pointing body for pointing on said touch screen and said row-direction wiring and said column-direction wiring.

9. A display comprising:
a touch panel of claim 8 ; and
a display element provided on a side, of said touch panel, opposite to a side on which pointing is performed on said touch screen, said display element being capable of displaying information.

10. An electronic equipment comprising:
a touch panel of claim 8 ; and
an electronic processor configured to perform electronically a predetermined process on information of said position detected by said touch-position detection circuit of said touch panel.

Assignees

• Mitsubishi Electric Corp

Inventors

• Nakamura Tatsuya
• Ono Takeshi
• Miyayama Takashi
• Nakagawa Naoki
• Agari Masafumi
• Orita Tae

Classifications

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F2203/04107

  Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/04164 Primary

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title