Touch screen, touch panel, and display apparatus

• US 10,359,890 B2
• Filed: 10/22/2015
• Issued: 07/23/2019
• Est. Priority Date: 11/14/2014
• Status: Active Grant

• Current Assignee: Trivale Technologies, LLC (Vector Capital Corporation)
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Nakamura, Tatsuya, Ono, Takeshi, Orita, Tae, Miyayama, Takashi
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): Zubajlo, Jennifer L
• Application Number:
  US14/919,925
• Publication Number:
  US 20160139707A1
• Time in Patent Office: 1,370 Days
• CPC Class Codes: G06F 2203/04112 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 Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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 lower electrode and an upper electrode have crossing portions where first element wiring of a mesh of the lower electrode and second element wiring of a mesh of the upper electrode cross each other in three dimensions. The lower electrode includes row-direction wiring and a floating electrode that are insulated from each other by disconnected portions provided to the first element wiring other than the crossing portions. The upper electrode includes column-direction wiring and a floating electrode that are insulated from each other by disconnected portions provided to the second element wiring other than the crossing portions.

Claims

1. A touch screen comprising:

a substrate; and

a mesh-like lower electrode and a mesh-like upper electrode that are disposed, on said substrate, with an insulating film therebetween, wherein

said lower electrode and said upper electrode have

first crossing portions where first element wiring of a mesh of said lower electrode and second element wiring of a mesh of said upper electrode cross each other in a plan view when viewed in a direction perpendicular to the substrate,

said lower electrode includes;

mesh-like first detection wiring that is one of row-direction wiring and column-direction wiring; and

mesh-like first insulating wiring that is insulated from said first detection wiring by first disconnected portions provided to said first element wiring other than said first crossing portions,

said upper electrode includes;

mesh-like second detection wiring that is the other one of said row-direction wiring and said column-direction wiring; and

mesh-like second insulating wiring that is insulated from said second detection wiring by second disconnected portions provided to said second element wiring other than said first crossing portions,

each of the first disconnected portions is provided at a position between one of the first crossing portions and a second crossing portion in which portions of the first element wiring cross each other and which is adjacent to the one of the first crossing portions along the first element wiring, and

the second element wiring is not provided to the first disconnected portions in the plan view, and the first element wiring is not provided to the second disconnected portions in the plan view.

2. The touch screen according to claim 1, wherein

said first insulating wiring and said second insulating wiring each include a floating electrode.

3. The touch screen according to claim 1, wherein

one of said first element wiring and said second element wiring has a larger width in said first crossing portions where the first element wiring and the second element wiring cross each other in the plan view than in portions of the one of said first element wiring and said second element wiring other than said first crossing portions.

4. The touch screen according to claim 3, wherein

the other one of said first element wiring and said second element wiring has a larger width in said first crossing portions than in portions other than said first crossing portions.

5. The touch screen according to claim 1, wherein

said first disconnected portions and said second disconnected portions have the same size, and are located close to each other.

6. A touch panel comprising:

a touch screen; and

a detection circuit that detects a touch position on said touch screen, wherein

said touch screen includes;

a substrate; and

a mesh-like lower electrode and a mesh-like upper electrode that are disposed, on said substrate, with an insulating film therebetween,

said lower electrode and said upper electrode have

first crossing portions where first element wiring of a mesh of said lower electrode and second element wiring of a mesh of said upper electrode cross each other in a plan view when viewed in a direction perpendicular to the substrate,

said lower electrode includes;

mesh-like first detection wiring that is one of row-direction wiring and column-direction wiring; and

mesh-like first insulating wiring that is insulated from said first detection wiring by first disconnected portions provided to said first element wiring other than said first crossing portions,

said upper electrode includes;

mesh-like second detection wiring that is the other one of said row-direction wiring and said column-direction wiring; and

mesh-like second insulating wiring that is insulated from said second detection wiring by second disconnected portions provided to said second element wiring other than said first crossing portions,

each of the first disconnected portions is provided at a position between one of the first crossing portions and a second crossing portion in which portions of the first element wiring cross each other and which is adjacent to the one of the first crossing portions along the first element wiring, and

the second element wiring is not provided to the first disconnected portions in the plan view, and the first element wiring is not provided to the second disconnected portions in the plan view.

7. A display apparatus comprising:

a touch screen; and

a display panel on which said touch screen is mounted, wherein

said touch screen includes;

a substrate; and

a mesh-like lower electrode and a mesh-like upper electrode that are disposed, on said substrate, with an insulating film therebetween,

said lower electrode and said upper electrode have

first crossing portions where first element wiring of a mesh of said lower electrode and second element wiring of a mesh of said upper electrode cross each other in a plan view when viewed in a direction perpendicular to the substrate,

said lower electrode includes;

mesh-like first detection wiring that is one of row-direction wiring and column-direction wiring; and

mesh-like first insulating wiring that is insulated from said first detection wiring by first disconnected portions provided to said first element wiring other than said first crossing portions,

said upper electrode includes;

mesh-like second detection wiring that is the other one of said row-direction wiring and said column-direction wiring; and

mesh-like second insulating wiring that is insulated from said second detection wiring by second disconnected portions provided to said second element wiring other than said first crossing portions,

each of the first disconnected portions is provided at a position between one of the first crossing portions and a second crossing portion in which portions of the first element wiring cross each other and which is adjacent to the one of the first crossing portions along the first element wiring, and

the second element wiring is not provided to the first disconnected portions in the plan view, and the first element wiring is not provided to the second disconnected portions in the plan view.