Touch screen

• US 10,120,510 B2
• Filed: 12/30/2015
• Issued: 11/06/2018
• Est. Priority Date: 01/08/2015
• Status: Active Grant

• Current Assignee: Trivale Technologies, LLC (Vector Capital Corporation)
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Ono, Takeshi, Nakamura, Tatsuya, Orita, Tae
• Primary Examiner(s): Mehmood, Jennifer
• Assistant Examiner(s): Azongha, Sardis F
• Application Number:
  US14/984,592
• Publication Number:
  US 20160202802A1
• Time in Patent Office: 1,042 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 touch screen according to the present invention includes a plurality of row direction wires and a plurality of column direction wires provided to intersect with each other through an insulating film in planar view. The plurality of row direction wires includes a mesh-like wire having a plurality of first row direction wires extending in the longitudinal direction and a plurality of second row direction wires extending in the lateral direction. The plurality of column direction wires includes a mesh-like wire having a plurality of first column direction wires extending in the longitudinal direction and a plurality of second column direction wires extending in the lateral direction, and each of the first row direction wires and each of the first column direction wires are provided at an interval of p/3 or more.

Claims

1. A touch screen comprising a plurality of row direction wires and a plurality of column direction wires provided to intersect with each other through an insulating film in planar view in a region corresponding to a region of a display element in which a plurality of sub-pixels are formed, said sub-pixels being disposed regularly in a lateral direction and a longitudinal direction and forming R, G and B having a pitch in said lateral direction of p/3, where p is the pitch of a pixel in said lateral direction,

wherein said plurality of row direction wires includes a mesh-like wire having a plurality of first row direction wires extending in said longitudinal direction and a plurality of second row direction wires extending in said lateral direction,

said plurality of column direction wires includes a mesh-like wire having a plurality of first column direction wires extending in said longitudinal direction and a plurality of second column direction wires extending in said lateral direction, and

each of said first row direction wires and each of said first column direction wires are provided at an interval satisfying ((4/3)+n)×

p (n is an integer of zero or more).

2. The touch screen according to claim 1, wherein each of said first row direction wires and each of said first column direction wires are alternately provided at an interval of p/3 or more in a region in which said row and column direction wires intersect with each other in planar view.

3. The touch screen according to claim 1, wherein each of said row direction wires and each of said column direction wires are provided in an overlapping position with a black matrix pattern for dividing each of the sub-pixels in planar view.

4. The touch screen according to claim 1, wherein each of said row direction wires and each of said column direction wires are provided in a meandering form.

5. The touch screen according to claim 4 further comprising a polarizing plate disposed on a side of said plurality of row direction wires and said plurality of column direction wires opposite to said display element,

wherein each of said row direction wires is provided in a meandering form in such a manner that a tangential line passing through an intersection point of each of said first row direction wires and each of said second row direction wires has an inclination of 10 degrees or less with respect to a polarizing axis of said polarizing plate, and

each of said column direction wires is provided in a meandering form in such a manner that a tangential line passing through an intersection point of each of said first column direction wires and each of said second column direction wires has an inclination of 10 degrees or less with respect to said polarizing axis of said polarizing plate.

6. The touch screen according to claim 1, wherein when each of said first row direction wires and each of said first column direction wires have a line width t, each of said first row direction wires and each of said first column direction wires are provided at an interval of 100 t or more.

7. The touch screen according to claim 1, wherein

said interval is selected in such a manner that said plurality of row direction wires and said plurality of column direction wires have the same width, and that a total area in planar view of said plurality of row direction wires and said plurality of column direction wires is equal to or smaller than 1% of an area of a whole display area.

8. A touch screen comprising a plurality of row direction wires and a plurality of column direction wires provided to intersect with each other through an insulating film in planar view in a region corresponding to a region of a display element in which a plurality of sub-pixels are formed, said sub-pixels being disposed regularly in a lateral direction and a longitudinal direction and forming R, G and B having a pitch in said lateral direction of p/3, where p is the pitch of a pixel in said lateral direction;

and

a polarizing plate disposed on an opposite side to said display element with respect to a plurality of row direction wires and a plurality of column direction wires, wherein each of said row direction wires and each of said column direction wires are provided with an inclination of 10 degrees or less with respect to a polarizing axis of said polarizing plate,

wherein said plurality of row direction wires includes a mesh-like wire having a plurality of first row direction wires extending in said longitudinal direction and a plurality of second row direction wires extending in said lateral direction,

said plurality of column direction wires includes a mesh-like wire having a plurality of first column direction wires extending in said longitudinal direction and a plurality of second column direction wires extending in said lateral direction, and

each of said first row direction wires and each of said first column direction wires are alternately provided in the lateral direction at an interval of more than p.

9. A touch screen comprising:

a plurality of row direction wires and a plurality of column direction wires provided to intersect with each other through an insulating film in planar view in a region corresponding to a region of a display element in which a plurality of sub-pixels are formed, said sub-pixels being disposed regularly in a lateral direction and a longitudinal direction, having a pitch in said lateral direction of p₁/3, where p₁ is a pitch of a pixel in said lateral direction, a pitch in said longitudinal direction of p₂, where p₂ is a pitch of said pixel in said longitudinal direction, and forming R, G and B satisfying tan<sup>−

1</sup> (p₁/6p₂)≤

π

/18, and

a polarizing plate disposed on a side of said plurality of row direction wires and said plurality of column direction wires opposite to said display element,

wherein said plurality of row direction wires includes a mesh-like wire having a plurality of first row direction wires extending in said longitudinal direction and a plurality of second row direction wires extending in said lateral direction,

said plurality of column direction wires include a mesh-like wire having a plurality of first column direction wires extending in said longitudinal direction and a plurality of second column direction wires extending in said lateral direction, and

each of said first row direction wires and each of said first column direction wires are provided at an interval of 1.5 np₁ (n is a positive integer which is greater than zero) and are disposed with an angle θ

formed by a polarizing axis of said polarizing plate satisfying tan θ

=p₁/6p₂.

10. The touch screen according to claim 9, wherein when each of said first row direction wires and each of said first column direction wires have a line width t, each of said first row direction wires and each of said first column direction wires are provided at an interval of 100 t or more.