Touch Panel and Display Device with Touch Panel

• US 20140192278A1
• Filed: 03/12/2014
• Published: 07/10/2014
• Est. Priority Date: 12/01/2009
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Japan Display Incorporated, Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: Esaka, Hiroshi, Ikeda, Shouji, Anno, Kouichi
• Granted Patent: US 9,323,294 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 1/169 the I/O peripheral being an integrated pointing device, e.g. trackball in the palm rest area, mini-joystick integrated between keyboard keys, touch pads or touch stripes G06F1/1643 takes precedence; constructional details of pointing devices G06F3/033
• 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
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

An electrostatic capacitive coupling type touch panel including an input region having four sides, a peripheral region around the input region, terminals formed in the peripheral region along a first side of the input region, wirings formed in the peripheral region along second, third and fourth sides of the input region, and the input region having X and Y electrodes crossing. The wirings are connected between corresponding X or Y electrodes and wiring terminals plurality of terminals. A dummy wiring, which is not connected to any of the X electrodes or Y electrodes, is provided outside the wiring formed in a farthest position from the input region, and the dummy wiring extends through the peripheral region along the second, third and fourth sides of the input region, and electrically connects to at least one dummy wiring terminal.

Claims

1. An electrostatic capacitive coupling type touch panel comprising:

an input region having four sides;

a peripheral region around the input region;

a plurality of terminals formed in the peripheral region along a first side of the input region;

a plurality of wirings formed in the peripheral region along a second, a third and a fourth side of the input region; and

the input region having a plurality of X electrodes and a plurality of Y electrodes crossing the X electrodes;

the plurality of wirings respectively being connected between corresponding electrodes of the plurality of X or Y electrodes and wiring terminals of the plurality of terminals;

wherein the plurality of wirings respectively has a conductive layer and a metal layer;

wherein a dummy wiring, which is not connected to any of the plurality of X electrodes or the plurality of Y electrodes, is provided outside the wiring of the plurality of wirings formed in a farthest position from the input region, among the plurality of wirings;

wherein the dummy wiring extends through the peripheral region along the second, third and fourth sides of the input region, and electrically connects to at least one dummy wiring terminal of the plurality of terminals.

2. The touch panel according to claim 1, wherein the dummy wiring is supplied with a reference voltage.

3. The touch panel according to claim 1, wherein the conductive layer has a transparent conductive film.

4. The touch panel according to claim 1,

wherein the plurality of wirings respectively have an upper conductive layer provided on the metal layer with an insulating film therebetween;

and

wherein the upper conductive layer is electrically connected to the conductive layer of the plurality of wirings.

5. The touch panel according to claim 4, wherein the conductive layer and the to upper conductive layer have a transparent conductive film.

6. The touch panel according to claim 1, wherein the X electrode and the Y electrode have a transparent conductive film.

7. The touch panel according to claim 1, wherein the X electrode and the Y electrode are formed with an insulating film therebetween.

8. The touch panel according to claim 1,

wherein the X electrode and the Y electrode have an intersection part between the X electrode and the Y electrode and an electrode part formed between two intersection parts;

wherein the electrode part and the intersection part of the X electrode and the electrode part of the Y electrode are formed on the same layer; and

wherein the intersection part of the Y electrode is formed on a different layer than the layer of the intersection part of the X electrode, with an insulating layer therebetween.