Electrostatic capacitance-type input device and input device-attached electro-optical apparatus

• US 10,019,111 B2
• Filed: 09/22/2017
• Issued: 07/10/2018
• Est. Priority Date: 10/21/2009
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Kurashima, Takeshi
• Primary Examiner(s): Pardo, Thuy
• Application Number:
  US15/712,362
• Publication Number:
  US 20180011602A1
• Time in Patent Office: 291 Days
• Field of Search: 345156, 345173, 345174, 345104
• 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 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• 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 electrostatic capacitance-type input device in which input position detecting electrodes are disposed in an input area of a substrate, includes a lower layer-side conductive film, an interlayer insulating film, and an upper layer-side conductive film, which are stacked on the substrate in order from the substrate side. A first input position detecting electrode and a second input position detecting electrode are formed as the input position detecting electrodes by a first conductive film out of the lower and upper layer-side conductive films. A relay electrode overlaps with the first input position detecting electrode in the intersection portion to be electrically connected to the discontinued portion of the second input position detecting electrode. An input area shield electrode that overlaps with the first and second input position detecting electrodes are formed by a second conductive film out of the lower and upper layer-side conductive films.

Claims

1. An electrostatic capacitance-type input device in which input position detecting electrodes are disposed in an input area of a substrate, the electrostatic capacitance-type input device comprising:

a lower layer-side conductive film;

an interlayer insulating film;

an upper layer-side conductive film, which are stacked on the substrate in this order from the substrate side;

a first position detecting electrode that is included in the input position detecting electrodes and that extends in a first direction of an in-plane direction of the substrate, the first position detecting electrode being a part of the upper layer-side conductive film;

a second position detecting electrode that is included in the input position detecting electrodes and that extends in a second direction intersecting the first direction of the in-plane direction of the substrate, the second position detecting electrode being a part of the upper layer-side conductive film, wherein the first position detecting electrode and the second position detecting electrode are coupled with a controller via a wiring;

an input area shield electrode that is one solid electrode having a plurality of slits and that is a part of the lower layer-side conductive film, the input area shield electrode overlapping the first position detecting electrode and the second position detecting electrode through the interlayer insulating film in a plan view; and

an outer periphery-side shield electrode that overlaps with the wiring through the interlayer insulating film in an outer area of the substrate that is positioned on an outer side of the input area, in the plan view, the outer periphery-side shield electrode being a part of the lower layer-side conductive film,

wherein the input area shield electrode and the outer periphery-side shield electrode are applied with a shield electric potential, which is an electric potential having a same waveform and a same phase as a position detecting signal supplied to the input position detecting electrode.

2. The electrostatic capacitance-type input device according to claim 1,

wherein a shielding auxiliary electrode that is disposed around the first position detecting electrode and the second position detecting electrode in the plan view, on an outer periphery side of the wiring on the substrate, the shielding auxiliary electrode being a part of the upper layer-side conductive film, and

wherein the shielding auxiliary electrode is applied with the shield electric potential.

3. The electrostatic capacitance-type input device according to claim 2,

wherein, in the outer area of the substrate, the wiring that is electrically connected to the input position detecting electrode, and

wherein the shielding auxiliary electrode and the outer periphery-side shield electrode overlap with each other so as to be electrically connected to each other in an area in which the interlayer insulating film on the outer periphery side of the wiring is not disposed.

4. The electrostatic capacitance-type input device according to claim 2, wherein the second position detecting electrode includes a discontinued portion in an intersection portion of the first position detecting electrode.

5. The electrostatic capacitance-type input device according to claim 4, further comprising a relay electrode that overlaps the first position detecting electrode through the interlayer insulating film in the intersection portion so as to be electrically connected to the discontinued portion of the second input position detecting electrode,

wherein the input area shield electrode is separated from the relay electrode.

6. The electrostatic capacitance-type input device according to claim 2, further comprising a flexible wiring substrate that includes a flexible substrate wiring of the wiring and a shield layer which is applied with the shield electric potential.

7. The electrostatic capacitance-type input device according to claim 2, wherein the wiring is a part of the upper layer-side conductive film.

8. The electrostatic capacitance-type input device according to claim 7, wherein the outer periphery-side shield electrode is formed integrally with the input area shield electrode by a part of the lower layer-side conductive film.

9. The electrostatic capacitance-type input device according to claim 2, wherein the lower layer-side conductive film, the interlayer insulating film, and the upper-layer side conductive film are disposed on a substrate face that is positioned on an input operation side of the substrate.