Input Device and Display Device Including the Same

• US 20100220076A1
• Filed: 02/25/2010
• Published: 09/02/2010
• Est. Priority Date: 02/27/2009
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Nagata, Yasunari, Shimizu, Takashi, Miyazaki, Yoshio, Minami, Takashi
• Granted Patent: US 8,466,898 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• 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

An input device includes an insulation layer having a first main surface, and a second main surface positioned on the opposite side of the first main surface, a first detection electrode pattern provided on the first main surface of the insulation layer and arranged along a first direction, a second detection electrode pattern arranged along a second direction and having an intersection region provided on the second main surface of the insulation layer so as to intersect with the first detection electrode pattern in a plan view, and a detection region provided on the first main surface of the insulation layer, and a conductive electrode provided on the second main surface of the insulation layer, in which the conductive electrode has an opening, and the intersection region of the second detection electrode pattern is positioned in the opening.

Claims

1. An input device comprising:

an insulation layer having a first main surface, and a second main surface on the opposite side of the first main surface;

a first detection electrode pattern provided on the first main surface of the insulation layer and arranged along a first direction;

a second detection electrode pattern arranged along a second direction and having an intersection region provided on the second main surface of the insulation layer so as to intersect with the first detection electrode pattern in a plan view, and a detection region provided on the first main surface of the insulation layer; and

a conductive electrode provided on the second main surface of the insulation layer, wherein

the conductive electrode has an opening, and

the intersection region of the second detection electrode pattern is positioned in the opening.

2. The input device according to claim 1, wherein

the first detection electrode pattern has a plurality of first detection electrodes to detect an input position, and a first connection electrodes to connect the adjacent first detection electrodes,

the second detection electrode pattern has a plurality of second detection electrodes to detect the input position, and a second connection electrode to connect the adjacent second detection electrodes, and

the first connection electrode overlaps the second connection electrode through the insulation layer therebetween to electrically isolate from each other.

3. The input device according to claim 2, wherein

an adjustment film is provided between the adjacent first detection electrodes, between the adjacent second detection electrodes, or between the first detection electrode and second detection electrode adjacent to each other.

4. The input device according to claim 3, wherein

the adjustment film is electrically connected to the conductive electrode.

5. The input device according to claim 1, comprising an input region to detect an input position, and an outside region outside the input region, wherein

the conductive electrode has a high resistance part in the input region and a low resistance part provided in the outside region;

and the low resistance part is formed of the same material as the high resistance part, and the low resistance part has a thickness thicker than the high resistance part.

6. The input device according to claim 1, wherein

the insulation layer has a through hole penetrating the insulation layer in a thickness direction,

an inner wall surface of the through hole has a projection curved surface, and

a part of the second detection electrode pattern is provided on the projection curved surface.

7. The input device according to claim 6, wherein

an angle of inclination of the inner wall surface with respect to the second main surface of the insulation layer has at least one local minimum value and local maximum value.

8. The input device according to claim 6, wherein

an angle of inclination of the inner wall surface with respect to the first main surface of the insulation layer has at least one local minimum value and local maximum value.

9. The input device according to claim 1, wherein the conductive electrode is set to a reference potential.

10. The input device according to claim 1, further comprising a base to support the insulation layer, wherein

the first detection electrode pattern and the second detection electrode pattern are provided on a main surface of the base.

11. A display device comprising:

the input device according to claim 1; and

a display panel opposed to the first detection electrode pattern and the second detection electrode pattern through the conductive electrode therebetween.