Electrostatic capacitance input device and electro-optical device having input device

• US 9,778,805 B2
• Filed: 09/16/2015
• Issued: 10/03/2017
• Est. Priority Date: 07/27/2009
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Kurashima, Takeshi
• Primary Examiner(s): NATALINI, JEFF WILLIAM
• Application Number:
  US14/856,211
• Publication Number:
  US 20160004360A1
• Time in Patent Office: 748 Days
• Field of Search: 324658-690, 345173-178
• 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 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 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• 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
• CPC Class Codes: H05K 1/0216 Reduction of cross-talk, noise or electromagnetic interference grounding H05K1/0215

Abstract

Disclosed herein is an electrostatic capacitance input device including: an input region of a substrate, in which a plurality of input position detection electrodes are provided; a plurality of wires that are electrically connected to the plurality of input position detection electrodes and extend outside the input region of the substrate; and a shield electrode that overlaps the wires on the input operation side.

Claims

1. An electrostatic capacitance input device comprising:

a substrate including an input region where an input operation is detected and an outer region where the input operation is not detected, the input region including a center portion of the substrate as seen in plan view, the outer region being between an outer periphery of the input region and an outer periphery of the substrate as seen in plan view;

a plurality of input position detection electrodes arranged in the input region;

a plurality of first wires that are electrically connected to the plurality of input position detection electrodes and extend in the outer region of the substrate;

a shield electrode provided in the outer region of the substrate;

a wiring board connected to the substrate;

a plurality of second wires formed on the wiring board;

a shield layer formed for the second wires; and

a controller operatively connected to the input position detection electrodes, the shield electrode, and the shield layer, and configured to cause a position detection signal to be applied through the second wires to the input position detection electrodes with a potential having the same waveform and phase as a potential that is applied to the shield electrode and the shield layer.

2. The electrostatic capacitance input device of claim 1, further comprising:

a plurality of first terminals arranged in the outer periphery of the substrate and coupled to the first wires and the second wires; and

a plurality of second terminals arranged in the outer periphery of the substrate and coupled to the shield electrode, wherein

the position detection signal is applied to the first wires through the first terminals and the second wires,

the shield potential is applied to the shield electrode through the second terminals, and

the second terminals are arranged so as to sandwich a region where the first terminals are arranged.

3. An electrostatic capacitance input device comprising:

a substrate including an input region where an input operation is detected and an outer region where the input operation is not detected, the input region including a center portion of the substrate as seen in plan view, the outer region being between an outer periphery of the input region and an outer periphery of the substrate as seen in plan view;

a plurality of input position detection electrodes arranged in the input region;

a plurality of first wires that are electrically connected to the plurality of input position detection electrodes and extend in the outer region of the substrate;

a shield electrode provided in the outer region of the substrate;

a wiring board connected to the substrate;

a plurality of second wires formed on the wiring board;

a shield layer formed for the second wires; and

a controller operatively coupled to the input position detection electrodes and the shield electrode, and the shield layer, and configured to cause a position detection signal to be applied to the input position detection electrodes and to cause a shield potential to be applied to the shield electrode and the shield layer;

a plurality of first terminals arranged in the outer periphery of the substrate and coupled to the first wires and the second wires; and

a plurality of second terminals arranged in the outer periphery of the substrate and coupled to the shield electrode, wherein

the position detection signal is applied to the first wires through the first terminals and the second wires,

the shield potential is applied to the shield electrode through the second terminals, and

the second terminals are arranged so as to sandwich a region where the first terminals are arranged.