Touch screen, touch panel, display, and electronic apparatus

• US 9,542,053 B2
• Filed: 01/23/2015
• Issued: 01/10/2017
• Est. Priority Date: 02/12/2014
• Status: Active Grant

• Current Assignee: Trivale Technologies, LLC (Vector Capital Corporation)
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Ono, Takeshi, Nakamura, Tatsuya, Imamura, Takuji, Miyayama, Takashi, Orita, Tae, Agari, Masafumi, Nakagawa, Naoki
• Primary Examiner(s): CERULLO, LILIANA P
• Application Number:
  US14/603,814
• Publication Number:
  US 20150227237A1
• Time in Patent Office: 718 Days
• US Class Current: 1/1
• 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 3/0445 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 first detection electrode formed on the transparent substrate, a second detection electrode disposed to sterically cross the first detection electrode via an interlayer insulating film, and a polarizing plate bonded to cover the second detection electrode. Each of the first detection electrode and the second detection electrode includes, as a repetition unit, thin wire electrodes that incline in different directions and cross each other. The thin wire electrodes are formed of a combination of a plurality of conductive thin wires extending in a direction inclined 10 degrees or less from a transmission axis direction or an absorption axis direction of the polarizing plate.

Claims

1. A touch screen comprising:

a transparent substrate;

a first detection electrode formed on said transparent substrate;

a second detection electrode disposed to cross said first detection electrode via an interlayer insulating film; and

a polarizing plate bonded to cover said second detection electrode,

wherein each of said first detection electrode and said second detection electrode includes, as a repetition unit, wire electrodes that incline in different directions and cross each other, said wire electrodes being formed of a combination of a plurality of conductive wires, with each wire extending in a direction inclined 10 degrees or less from a transmission axis direction or an absorption axis direction of said polarizing plate.

2. The touch screen according to claim 1, wherein said plurality of conductive wires are linear.

3. The touch screen according to claim 1, wherein said wire electrodes forming each of said first detection electrode and said second detection electrode have a meshed structure in which said conductive wires are combined with each other with ends thereof being interconnected.

4. The touch screen according to claim 1, wherein said wire electrodes having a mesh pattern and forming said first detection electrode and said wire electrodes having a mesh pattern and forming said second detection electrode complementarily deviate from each other in plan view.

5. A touch panel comprising:

the touch screen according to claim 1;

a switching circuit that successively selects each of a plurality of the first detection electrodes and a plurality of the second detection electrodes; and

a detection processing circuit that performs a calculation processing of touch coordinates on said touch screen on the basis of a capacitance formed between said first detection electrode selected by said switching circuit and a pointer touching a surface of said touch screen and between said second detection electrode selected by said switching circuit and said pointer.

6. A display comprising a display panel, including the touch panel according to claim 5 located on said display panel.

7. An electronic apparatus comprising:

the touch panel according to claim 5; and

an electron device that processes an output from said detection processing circuit of said touch panel as an input signal.