Touch panel and display device with touch panel

• US 10,261,647 B2
• Filed: 11/06/2018
• Issued: 04/16/2019
• Est. Priority Date: 12/01/2009
• Status: Active Grant

• Current Assignee: Paneltouch Technologies LLC (Touch Display LLC)
• Original Assignee: Japan Display Incorporated, Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: Esaka, Hiroshi, Ikeda, Shouji, Anno, Kouichi
• Primary Examiner(s): Lao, Lunyi
• Assistant Examiner(s): Suteerawongsa, Jarurat
• Application Number:
  US16/181,471
• Publication Number:
  US 20190073063A1
• Time in Patent Office: 161 Days
• 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. A display device with a touch panel,

the touch panel comprising:

a substrate;

an input region including a plurality of electrodes;

a peripheral region outside of the input region;

a plurality of connecting terminals formed in the peripheral region and arranged between a short edge of the substrate and the input region; and

a plurality of wirings formed in the peripheral region and electrically connecting between the plurality of electrodes and the plurality of connecting terminals respectively,

wherein a dummy wiring, which is not connected to any of the plurality of electrodes, is provided in the peripheral region along with and outside of a corner of the input region, and connects a pair of connecting terminals which are formed at both ends of the plurality of connecting terminals,

a corner portion of the dummy wiring along the corner of the input region bends only once at a first angle and has an outer edge,

the outer edge of the corner portion of the dummy wiring has an obtuse angle, and the first angle is smaller than the obtuse angle.

2. The display device according to claim 1,

wherein the dummy wiring is supplied with a reference voltage.

3. The display device according to claim 1,

wherein the plurality of electrodes are made of a transparent conductive film.

4. The display device according to claim 1,

wherein the plurality of wirings respectively have an upper conductive layer and a lower conductive layer.

5. The display device according to claim 4,

wherein the upper conductive layer of each of the plurality of wirings has a transparent conductive film.

6. The display device according to claim 4,

wherein the lower conductive layer of each of the plurality of wirings has a metal film.

7. The display device according to claim 1,

wherein the electrodes have an X-electrode and a Y-electrode intersecting the X-electrode.

8. The display device according to claim 7,

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 there between.

9. A display device with a touch panel,

the touch panel comprising:

a substrate;

an input region including a plurality of electrodes;

a peripheral region outside of the input region;

a plurality of connecting terminals formed in the peripheral region and arranged between a short edge of the substrate and the input region; and

a plurality of wirings formed in the peripheral region and electrically connecting between the plurality of electrodes and the plurality of connecting terminals respectively,

wherein a dummy wiring, which is not connected to any of the plurality of electrodes, is provided in the peripheral region along with and outside of a corner of the input region, and connects a pair of connecting terminals which are formed at both ends of the plurality of connecting terminals,

the dummy wiring is provided at the same interval as that of the plurality of wirings,

the dummy wiring has a corner along an outermost corner of the plurality of wirings,

the corner of the dummy wiring bends at a first angle and has an outer edge,

the outer edge of the dummy wiring bends at a second angle which is greater than the first angle, and

the corner of the dummy wiring bends only once at the corner of the dummy wiring.

10. The display device according to claim 9,

wherein the dummy wiring is supplied with a reference voltage.

11. The display device according to claim 9,

wherein the plurality of electrodes are made of a transparent conductive film.

12. The display device according to claim 9,

wherein the plurality of wirings respectively have an upper conductive layer provided over a lower conductive film, which has a metal layer,

an insulating film is formed between the lower conductive film and the upper conductive film.

13. The display device according to claim 12,

wherein the upper conductive layer of each of the plurality of wirings has a transparent conductive film.

14. The display device according to claim 9,

wherein the electrodes have an X-electrode and a Y-electrode intersecting the X-electrode.

15. The display device according to claim 14,

wherein the X electrode and the Y electrode are formed with an insulating film there between.

16. The display device according to claim 14,

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 there between.

17. A display device with an electrostatic capacitive coupling type touch panel,

the electrostatic capacitive coupling type touch panel comprising:

a substrate;

an input region including a plurality of electrodes;

a peripheral region outside of the input region;

a plurality of connecting terminals formed in the peripheral region and arranged between a short edge of the substrate and the input region; and

a plurality of wirings formed in the peripheral region and electrically connecting between the plurality of electrodes and the plurality of connecting terminals respectively,

wherein a dummy wiring, which is not connected to any of the plurality of electrodes, is provided in the peripheral region along with and outside of a corner of the input region, and connects a pair of connecting terminals which are formed at both ends of the plurality of connecting terminals,

the dummy wiring has a corner along with a corner of the input region,

the corner of the dummy wiring bends at a first angle and has a turned outer edge, a turn of the outer edge is more gradual than the first angle, and

the corner of the dummy wiring bends only once at the corner of the dummy wiring.

18. The display device according to claim 17,

wherein the dummy wiring is supplied with a reference voltage.

19. The display device according to claim 17,

wherein the plurality of wirings respectively have a metal layer.

20. The display device according to claim 17,

wherein the plurality of wirings respectively have a metal layer and a transparent conductive layer.