Touch screen, touch panel, display, and electronic equipment

• US 9,760,229 B2
• Filed: 07/15/2015
• Issued: 09/12/2017
• Est. Priority Date: 08/11/2014
• Status: Active Grant

• Current Assignee: Trivale Technologies, LLC (Vector Capital Corporation)
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Nakamura, Tatsuya, Ono, Takeshi, Miyayama, Takashi, Nakagawa, Naoki, Agari, Masafumi, Orita, Tae
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): Zubajlo, Jennifer
• Application Number:
  US14/800,278
• Publication Number:
  US 20160041651A1
• Time in Patent Office: 790 Days
• Field of Search: 345173
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

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.

Claims

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.