Capacitive touch screen and single layer wiring electrode array

• US 9,678,610 B2
• Filed: 07/17/2013
• Issued: 06/13/2017
• Est. Priority Date: 07/20/2012
• Status: Active Grant

• Current Assignee: Silead Inc (Galaxycore Incorporated)
• Original Assignee: Silead Inc (Galaxycore Incorporated)
• Inventors: Cheng, Taiyi, Zhao, Tianming, Tang, Hao
• Primary Examiner(s): Eisen, Alexander
• Assistant Examiner(s): ALMEIDA, CORY A
• Application Number:
  US14/415,237
• Publication Number:
  US 20150177878A1
• Time in Patent Office: 1,427 Days
• CPC Class Codes: G06F 1/16 Constructional details or arrangements
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

Disclosed are a capacitive touch screen and a single layer wiring electrode array. The single layer wiring electrode array includes capacitive regions and wiring regions located on one plane. Wires in the wiring regions are zigzag-shaped or wave-shaped. The capacitive touch screen includes a substrate; a single layer wiring electrode array disposed over the substrate, wherein the single layer wiring electrode array includes capacitive regions and wiring regions located on one plane and wires in the wiring region are zigzag-shaped or wave-shaped; and control ports for connecting to one or more integrated circuits, wherein the wires in the wiring regions are connected to the control ports respectively. The single layer wiring electrode array and the capacitive touch screen lower the fabrication cost and improve the display effects.

Claims

1. A single layer wiring electrode array for use in a touch sensing device, comprising:

a conductive layer having capacitive regions and wiring regions located on one plane and arranged in an alternating manner;

one capacitor cell in each of the capacitive regions; and

one wire in each of the wiring regions, wherein;

each of the capacitor cells includes a driving electrode and a sensing electrode disposed opposite to the driving electrode;

each of the driving and sensing electrodes has at least two sides that are zigzag-shaped or wave-shaped; and

the wires are curved, wherein one of the wiring regions includes second wires connected to multiple driving electrodes in parallel and a first wire that connects multiple sensing electrodes in series.

2. The single layer wiring electrode array of claim 1, wherein the wires are zigzag-shaped or wave-shaped.

3. The single layer wiring electrode array of claim 1, wherein the driving electrode includes a hole.

4. The single layer wiring electrode array of claim 1, wherein the sensing electrode includes a hole.

5. The single layer wiring electrode array of claim 1, wherein:

a first side of the driving electrode is zigzag-shaped or wave-shaped;

a second side of the sensing electrode is zigzag-shaped or wave-shaped; and

the first and second sides are parallel to each other.

6. The single layer wiring electrode array of claim 1, wherein:

one of the capacitor cells includes a first plurality of driving electrodes and a second plurality of sensing electrodes;

the first plurality fits into grooves formed by the second plurality; and

the second plurality fits into grooves formed by the first plurality.

7. The single layer wiring electrode array of claim 1, wherein the one of the wiring regions further includes a separation wire located between the first wire and the second wires, and the separation wire is not connected to any electrode for driving or sensing.

8. The single layer wiring electrode array of claim 7, wherein:

the separation wire is wave-shaped or zigzag-shaped; and

the separation wire is parallel to an edge of the first wire and an edge of one of the second wires.

9. The single layer wiring electrode array of claim 1, wherein the conductive layer is indium-tin-oxide (ITO).

10. A capacitive touch screen, comprising:

a substrate;

a single layer wiring electrode array disposed over the substrate, wherein the single layer wiring electrode array includes capacitive regions and wiring regions that are arranged in an alternating manner, a plurality of capacitors in the capacitive regions, and a plurality of wires in the wiring regions, wherein the wires are connected to the capacitors and are zigzag-shaped or wave-shaped, wherein each of the capacitors includes a driving electrode and a sensing electrode, a first side of the driving electrode is zigzag-shaped or wave-shaped, a second side of the sensing electrode is zigzag-shaped or wave-shaped, and the first and second sides are in parallel; and

control ports for connecting to at least one integrated circuit (IC), wherein the wires are connected to the control ports respectively,

wherein one of the wiring regions includes a first wire connected to a sensing electrode of the capacitors and a second wire connected to a driving electrode of the capacitors.

11. The capacitive touch screen of claim 10, further comprising a ground wire connected to one of the control ports for connecting to the IC.

12. The capacitive touch screen of claim 11, wherein the ground wire is wave-shaped or zigzag-shaped.

13. The capacitive touch screen of claim 11, wherein the ground wire is disposed between the first wire and the second wire.

14. The capacitive touch screen of claim 10, wherein the substrate is one of:

glass, toughened glass, tempered glass, and polyethylene terephthalate (PET).

15. The capacitive touch screen of claim 10, wherein at least two sides of each of the driving and sensing electrodes are zigzag-shaped.

16. The capacitive touch screen of claim 15, wherein:

the driving electrode includes a first hole as defined by inner edges of the driving electrode;

the sensing electrode includes a second hole as defined by inner edges of the sensing electrode;

the inner edges of the driving electrode have the same shape as the outer edges of the driving electrode; and

the inner edges of the sensing electrode have the same shape as the outer edges of the sensing electrode.

17. An event sensing device, comprising:

a substrate; and

a conductive layer disposed over the substrate, wherein the conductive layer includes;

a first capacitive region having first capacitors;

a second capacitive region having second capacitors, wherein each of the first and second capacitors comprises a driving electrode coupled to a sensing electrode, and a zigzag-shaped or wave-shaped side of the driving electrode is opposite a zigzag-shaped or wave-shaped side of the sensing electrode;

a wiring region between the first and second capacitive regions, the wiring region having first, second, and third wires, wherein the first wire is connected to a driving electrode of the second capacitors, the second wire is connected to another driving electrode of the second capacitors, the third wire is connected to a sensing electrode of the first capacitors, and the first, second, and third wires are zigzag-shaped; and

first, second, and third control ports for connecting to at least one integrated circuit (IC), wherein the first, second, and third wires are connected to the first, second, and third control ports respectively.

18. The event sensing device of claim 17, wherein the first, second, and third ports are located at one side of the conductive layer.

19. The event sensing device of claim 17, wherein the first and second ports are located at opposite sides of the conductive layer.

20. The event sensing device of claim 17, wherein the conductive layer further includes a fourth wire that is zigzag-shaped and is located between the third wire and the first and second wires, wherein the fourth wire is not connected to any electrode for driving or sensing.