Touch panel and display device with touch panel

• US 9,323,294 B2
• Filed: 03/12/2014
• Issued: 04/26/2016
• 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, Lun-Yi
• Assistant Examiner(s): Suteerawongsa, Jarurat
• Application Number:
  US14/206,388
• Publication Number:
  US 20140192278A1
• Time in Patent Office: 776 Days
• Field of Search: 345156-157, 345173-174, 178/18.01, 178/18.03, 178 1806- 1807, 178/19.01, 178/19.03
• US Class Current: 1/1
• 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 first side, a second side, a third side, and a fourth side, and four corners, a first corner, a second corner, a third corner, and a fourth corner, wherein the first corner is a corner between the first side and the second side, the second corner is a corner between the second side and the third side, the third corner is a corner between the third side and the fourth side, and the fourth corner is a corner between the fourth side and the first side;

a peripheral region that is outside of the input region;

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

a plurality of wirings formed in the peripheral region, wherein at least one of the plurality of wiring is formed along with and outside of one of the first corner, the second corner, the third corner, or the fourth corner of the input region;

wherein

the input region comprises a plurality of X electrodes respectively having an electrode pattern and a plurality of Y electrodes crossing the X electrodes;

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

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

a first outermost wiring of the plurality of wirings has a first outermost corner that is located along with the first corner or the second corner of the input region, and farthest from the first corner or the second corner of the input region;

a second outermost wiring of the plurality of wirings has a second outermost corner that is located along with the third corner or the fourth corner of the input region, and farthest from the third corner or the fourth corner of the input region;

wherein a dummy wiring, which is not connected to any of the plurality of X electrodes or the plurality of Y electrodes, is provided in the peripheral region along with and outside of the first outermost corner of the first outermost wiring and the second outermost corner of the second outermost wiring of the plurality of wirings,

wherein the dummy wiring has the metal layer,

wherein the dummy wiring has a corner along the one of the first outermost corner or the second outermost corner,

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

wherein the outer edge of the corner of the dummy wiring has an obtuse angle.

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 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.

9. An electrostatic capacitive coupling type touch panel comprising:

an input region having four sides, a first side, a second side, a third side, and

a fourth side, and four corners, a first corner, a second corner, a third corner, and a fourth corner, wherein the first corner is a corner between the first side and the second side, the second corner is a corner between the second side and the third side, the third corner is a corner between the third side and the fourth side, and the fourth corner is a corner between the fourth side and the first side;

a peripheral region that is outside of the input region;

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

a plurality of wirings formed in the peripheral region wherein at least one of the plurality of wiring is formed along with and outside of one of the first corner, the second corner, the third corner, or the fourth corner of the input region;

wherein

the input region comprises a plurality of X electrodes respectively having an electrode pattern and a plurality of Y electrodes crossing the X electrodes,

the plurality of wirings are respectively connected between corresponding electrodes of the plurality of X or Y electrodes and wiring terminals of the plurality of terminals,

the plurality of wirings respectively has a conductive layer and a metal layer,

a first outermost wiring of the plurality of wirings has a first outermost corner that is located along with the first corner or the second corner of the input region, and farthest from the first corner or the second corner of the input region;

a second outermost wiring of the plurality of wiring has a second outermost corner that is located along with the third corner or the fourth corner of the input region;

wherein a dummy wiring, which is not connected to any of the plurality of X electrodes or the plurality of Y electrodes, is provided in the peripheral region along with and outside of the first outmost corner of the first outermost wiring and the second outermost corner of the second outermost wiring of the plurality of wirings,

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

wherein the dummy wiring has a corner along the one of the first outermost corner or the second outermost corner,

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

wherein the outer edge of the corner of the dummy wiring has a second angle which is greater than the first angle.

10. The touch panel according to claim 9, wherein the dummy wiring is supplied with a reference voltage.

11. The touch panel according to claim 9, wherein the conductive layer has a transparent conductive film.

12. The touch panel according to claim 9,

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.

13. The touch panel according to claim 12, wherein the conductive layer and the upper conductive layer have a transparent conductive film.

14. The touch panel according to claim 9, wherein the X electrode and the Y electrode have a transparent conductive film.

15. The touch panel according to claim 9, wherein the X electrode and the Y electrode are formed with an insulating film therebetween.

16. The touch panel according to claim 9, 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.

17. An electrostatic capacitive coupling type touch panel comprising:

an input region having four sides, a first side, a second side, a third side, and a fourth side, and four corners, a first corner, a second corner, a third corner, and a fourth corner, wherein the first corner is a comer between the first side and the second side, the second corner is a corner between the second side and the third side, the third comer is a comer between the third side and the fourth side, and the fourth corner is a corner between the fourth side and the first side;

a peripheral region that is outside of the input region;

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

a plurality of wirings formed in the peripheral region wherein at least one of the plurality of wiring is formed along with and outside of one of the first corner, the second corner, the third comer, or the fourth comer of the input region;

wherein

the input region comprises a plurality of X electrodes respectively having an electrode pattern and plurality of Y electrode crossing the X electrodes;

the plural wirings are respectively connected between corresponding electrodes of the plurality of X or Y electrodes and wiring terminals of the plurality of terminals,

a dummy wiring which is not connected to any of the plurality of X electrodes or the plurality of Y electrodes, is provided outside of an outermost wiring of the plurality of wirings,

the dummy wiring has a comer along with one of the first comer, the second corner, the third comer, or the fourth comer, and

and a turn of the outer edge is more gradual than the first angle.

18. The touch panel according to claim 17, wherein the dummy wiring is supplied with a reference voltage.

19. The touch panel according to claim 17, wherein each of the plurality of wirings has a metal layer.

20. The touch panel according to claim 17, wherein each of the plurality of wirings has a metal layer and transparent conductive layer.