Touch window

• US 9,772,734 B2
• Filed: 05/27/2016
• Issued: 09/26/2017
• Est. Priority Date: 09/16/2013
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Lee, Byoung Ryul, Han, Jae Heung
• Primary Examiner(s): PHAM, VIET DAVID
• Application Number:
  US15/166,541
• Publication Number:
  US 20160274701A1
• Time in Patent Office: 487 Days
• 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 3/0443 using a single layer of sensing electrodes
• 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

Disclosed is a touch window. The touch window includes a cover substrate; a ground electrode on the cover substrate; and a circuit substrate on the cover substrate, including a ground connecting part connected with the ground electrode and an open area to expose the ground connecting part, wherein the ground electrode is electrically connected to the ground connecting part through the open area.

Claims

1. A touch window of capacitive type, comprising:

a cover substrate having a first area and a second area surrounding top, bottom, left, and right sides of the first area;

an outer dummy layer on the second area of the cover substrate;

an electrode substrate on the cover substrate;

a sensing electrode to sense a position, and a wire to electrically connect the sensing electrode, wherein the sensing electrode and the wire are disposed on at least one surface of the electrode substrate;

a circuit substrate between the cover substrate and the electrode substrate, wherein the circuit substrate includes a ground connecting part and a wire connecting part; and

a plurality of ground electrodes disposed on the second area,

wherein the plurality of ground electrodes is electrically connected to the ground connecting part;

wherein the plurality of ground electrodes comprises a first ground electrode and a second ground electrode, wherein the first ground electrode is positioned further outward than the wire in the second area,

wherein the first ground electrode is positioned further outward than the second ground electrode in the second area,

wherein the first ground electrode is disposed on a top surface of the circuit substrate and the wire is disposed on a bottom surface of the circuit substrate opposite to the top surface,

wherein the wire is electrically connected to the wire connecting part between the circuit substrate and the electrode substrate, and

wherein an area of the cover substrate is larger than an area of the electrode substrate.

2. The touch window of claim 1, wherein the circuit substrate includes a bottom coverlay on which the ground connecting part and the wire connecting part are disposed;

and a top coverlay disposed on the bottom coverlay.

3. The touch window of claim 2, wherein the circuit substrate comprises an open area in the top coverlay of the circuit substrate exposing the ground connecting part.

4. The touch window of claim 1, further comprising an adhesive layer between the cover substrate and the circuit substrate.

5. The touch window of claim 4, wherein the adhesive layer has conductivity.

6. The touch window of claim 4, wherein the adhesive layer electrically connects the first ground electrode to the ground connecting part.

7. The touch window of claim 1, wherein the second ground electrode is adjacent to the sensing electrode.

8. The touch window of claim 1, wherein the sensing electrode includes a first sensing electrode and a second sensing electrode.

9. The touch window of claim 1, wherein the ground connecting part and the wire connecting part are disposed on a same plane of the circuit substrate.

10. The touch window of claim 1, wherein the circuit substrate includes a first open area and a second open area,

the first open area exposes the ground connecting part, and

the second open area exposes the wire connecting part.

11. The touch window of claim 1, wherein the sensing electrode and the second ground electrode are disposed on a same plane.

12. The touch window of claim 1, wherein the first ground electrode is disposed closer to the cover substrate than the second ground electrode.

13. The touch window of claim 1,

wherein the ground connecting part comprises a first ground connecting part and a second ground connecting part,

wherein the first ground connecting part is connected to the first ground electrode, and the second ground connecting part is connected to the second ground electrode.

14. The touch window of claim 1, wherein the electrode substrate comprises:

a first electrode substrate including a first sensing electrode, a first wire, and the second ground electrode; and

a second electrode substrate including a second sensing electrode, a second wire, and a third ground electrode;

wherein the first ground electrode is disposed on a lower surface of the cover substrate,

wherein the first electrode substrates is disposed on the lower surface of the cover substrate, and

wherein the second electrode substrates is disposed on the lower surface of the first electrode substrate.

15. The touch window of claim 14, wherein the second ground electrode extends across an outer portion of a plurality of the first wire extending in one direction.

16. The touch window of claim 14, wherein the third ground electrode extends across an outer portion of a plurality of the second wire extending in one direction.

17. The touch window of claim 14, wherein the first sensing electrode extends in one direction and the second sensing electrode extends in another direction crossing the one direction.

18. The touch window of claim 14, wherein the second ground electrode is disposed in the first area that is a display area, and

wherein the third ground electrode is disposed in the first area.

19. The touch window of claim 1, wherein the first ground electrode includes a first ground electrode part extending in a first direction and a second ground electrode part extending in a second direction perpendicular to the first direction, and

wherein the first ground electrode part is connected to the second ground electrode part in a straight line or in a curved line.

20. A touch window of capacitive type comprising:

a cover substrate having a first area and a second area surrounding top, bottom, left, and right sides of the first area;

a ground electrode disposed on the second area;

an electrode substrate on the cover substrate;

a sensing electrode to sense a position, and a wire to electrically connect the sensing electrode, wherein the sensing electrode and the wire are disposed on the electrode substrate; and

a circuit substrate disposed between the cover substrate and the electrode substrate, the circuit substrate including a ground connecting part and a wire connecting part electrically connected to the wire;

wherein the wire is disposed on the electrode substrate,

wherein a surface on which the ground electrode is directly disposed is different from that on which the wire is directly disposed,

wherein the ground electrode is disposed on a top surface of the circuit substrate and the wire is disposed on a bottom surface of the circuit substrate opposite to the top surface,

wherein the top surface faces the cover substrate and the bottom surface faces the electrode substrate, and

wherein an area of the cover substrate is larger than an area of the electrode substrate.

21. The touch window of claim 20, further comprising an adhesive layer between the cover substrate and the circuit substrate,

wherein the adhesive layer electrically connects the ground electrode to the ground connecting part.

22. A touch window of capacitive type comprising:

a cover substrate having a first area and a second area surrounding top, bottom, left, and right sides of the first area;

an electrode substrate on the cover substrate;

a sensing electrode to sense a position, and a wire to electrically connect the sensing electrode disposed on the electrode substrate; and

a plurality of ground electrodes disposed on the second area;

wherein the sensing electrode comprises a plurality of first sensing electrodes extended in a first direction and a plurality of second sensing electrodes extending in a second direction,

wherein the wire comprises a plurality of first wires electrically connected to the first sensing electrodes and a plurality of second wires electrically connected to the second sensing electrodes,

wherein the plurality of ground electrodes comprises a first ground electrode, a second ground electrode, and a third ground electrode;

wherein the first ground electrode is positioned further outward than an outermost one of the first wires,

wherein the first ground electrode is positioned further outward than the second ground electrode in the second area,

wherein the first ground electrode is positioned further outward than the third ground electrode in the second area, and

wherein the first ground electrode is disposed on a top surface of the circuit substrate and the wire is disposed on a bottom surface of the circuit substrate opposite to the top surface.