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

• US 9,588,630 B2
• Filed: 03/01/2016
• Issued: 03/07/2017
• 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 N
• Application Number:
  US15/057,521
• Publication Number:
  US 20160179254A1
• Time in Patent Office: 371 Days
• Field of Search: 345/173, 345/174, 345/175, 324/681, 178/18.06, 178/20.01
• US Class Current: 1/1
• 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 input position detecting electrode that extends in a first direction of an in-plane direction of the substrate;

a second input position detecting electrode that extends in a second direction intersecting the first direction of the in-plane direction of the substrate and that is formed as the input position detecting electrodes by a first conductive film, which is positioned in an input operation side, out of the lower layer-side conductive film and the upper layer-side conductive film; and

an input area shield electrode that overlaps with the first input position detecting electrode and the second input position detecting electrode through the interlayer insulating film in a plan view are formed by a second conductive film, which is positioned on a side opposite to the input operation side, out of the lower layer-side conductive film and the upper layer-side conductive film,

wherein the input area shield electrode is applied with a shield electric potential having the same waveform and phase as a position detection signal applied to the first input position detecting electrode and the second input position detecting electrode,

wherein the first input position detecting electrode and the second input position detecting electrode are coupled with a controller, which detects an input operation performed on the electrostatic capacitance-type input device, via a wiring through which the position detecting signal is transmitted,

wherein, in an area of the substrate that is positioned on an outer side of the input area,

the wiring that is electrically connected to the input position detecting electrode by one conductive film of the first conductive film and the second conductive film is formed, and

an outer periphery-side shield electrode that overlaps with the wiring through the interlayer insulating film in a plane view is formed by the other conductive film of the first conductive film and the second conductive film,

wherein, on an outer periphery side of the wiring on the substrate, a shielding auxiliary electrode is formed by the conductive film, which is disposed on the side forming the wiring, out of the first conductive film and the second conductive film,

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 disposed on the outer periphery side of the wiring is not formed, and

wherein the shielding auxiliary electrode is electrically connected to the input area shield electrode.

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

the second input position detecting electrode includes a discontinued portion in an intersection portion of the first input position detecting electrode.

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

a relay electrode that overlaps with the first input 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.

4. The electrostatic capacitance-type input device according to claim 1, further comprising a flexible wiring substrate that includes a flexible substrate wiring of the wiring and a shield layer which is applied with the electric potential.

5. The electrostatic capacitance-type input device according to claim 1, wherein the wiring is formed by the first conductive film, and

wherein the outer periphery-side shield electrode is formed by the second conductive film.

6. The electrostatic capacitance-type input device according to claim 5, wherein the outer periphery-side shield electrode is formed integrally with the input area shield electrode by the second conductive film.

7. The electrostatic capacitance-type input device according to claim 1, wherein the wiring is formed by the second conductive film, and

wherein the outer periphery-side shield electrode is formed by the first conductive film.

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

wherein, the lower layer-side conductive film, the interlayer insulating film, and the upper-layer side conductive film are formed on a substrate face that is positioned on the input operation side of the substrate, and

wherein the upper layer-side conductive film is the first conductive film, and the lower layer-side conductive film is the second conductive film.

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

wherein the lower layer-side conductive film, the interlayer insulating film, and the upper-layer side conductive film are formed on a substrate face that is positioned on a side opposite to the input operation side of the substrate, and

wherein the lower layer-side conductive film is the first conductive film, and the upper layer-side conductive film is the second conductive film.

10. The electrostatic capacitance-type input device according to claim 1, wherein the shielding auxiliary electrode is formed integrally with the input area shield electrode.

11. An input device-attached electro-optical apparatus including 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 input position detecting electrode that extends in a first direction of an in-plane direction of the substrate;

a second input position detecting electrode that extends in a second direction intersecting the first direction of the in-plane direction of the substrate and that is formed as the input position detecting electrodes by a first conductive film, which is positioned in an input operation side, out of the lower layer-side conductive film and the upper layer-side conductive film;

an input area shield electrode that overlaps with the first input position detecting electrode and the second input position detecting electrode through the interlayer insulating film in a plan view are formed by a second conductive film, which is positioned on a side opposite to the input operation side, out of the lower layer-side conductive film and the upper layer-side conductive film; and

an electro-optical panel for generating an image being configured on a side of the substrate that is opposite to the input operation side,

wherein the input area shield electrode is applied with a shield electric potential having the same waveform and phase as a position detection signal applied to the first input position detecting electrode and the second input position detecting electrode,

wherein the first input position detecting electrode and the second input position detecting electrode are coupled with a controller, which detects an input operation performed on the electrostatic capacitance-type input device, via a wiring through which the position detecting signal is transmitted,

wherein, in an area of the substrate that is positioned on an outer side of the input area,

the wiring that is electrically connected to the input position detecting electrode by one conductive film of the first conductive film and the second conductive film is formed, and

an outer periphery-side shield electrode that overlaps with the wiring through the interlayer insulating film in a plane view is formed by the other conductive film of the first conductive film and the second conductive film,

wherein, on an outer periphery side of the wiring on the substrate, a shielding auxiliary electrode is formed by the conductive film, which is disposed on the side forming the wiring, out of the first conductive film and the second conductive film,

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 disposed on the outer periphery side of the wiring is not formed, and

wherein the shielding auxiliary electrode is electrically connected to the input area shield electrode.