Touch window having a sensing electrode with a variable width of a conductive line

Patent metadata

Field	Value
Publication number	US-11340741-B2
Application number	US-202016944633-A
Country	US
Kind code	B2
Filing date	Jul 31, 2020
Priority date	Oct 17, 2013
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

A touch window may include a sensing electrode to sense a position, and a wire to electrically connect the sensing electrode. A width of the sensing electrode is variable.

First claim

What is claimed is:

1. A touch window comprising:
a substrate having an active area in which a position of an input device is detected and an unactive area provided at a peripheral portion of the active area;
an outer dummy layer is formed in the unactive area of the substrate;
a sensing electrode is provided in an active area and an unactive area of a substrate to sense the input device;
wherein a portion of the sensing electrode overlaps with the outer dummy layer,
a wire is provided in the unactive area for an electrical connection of the sensing electrode; and
an electrode pad is positioned at an end of the wire and connected with a printed circuit board,
wherein the sensing electrode has a mesh shape that includes:
a plurality of first conductive lines extending in a first direction;
a plurality of second conductive lines extending in a second direction; and
an opening is formed by the first and second conductive lines,
wherein the wire includes a wire pad which includes a side in contact with the sensing electrode,
wherein the first conductive lines and the second conductive lines cross each other,
wherein the first conductive lines include a first part having a uniform width in the first direction and a second part disposed between the wire pad and the first part having a varied width in the first direction,
wherein the first part is provided in the active area of the substrate and the second part is provided in the unactive area of the substrate and overlaps with the outer dummy layer,
a maximum width of the second part is less than a half of a minimum distance between two adjacent second parts,
wherein the sensing electrode, the wire and the electrode pad are formed by etching metallic material on the substrate,
wherein the sensing electrode, the wire and the electrode pad having a same material including Ni, Cu, Al, Ag, or an alloy thereof,
wherein a maximum distance between top edges of the two adjacent second parts is greater than a width of the opening, in which the width of the opening is defined as a distance between two adjacent first conductive lines.

2. The touch window of claim 1 , wherein the width of the second part increases, in a direction parallel to the side of the wire pad, as the second part extends from the first part to the wire pad.

3. The touch window of claim 1 , wherein the maximum width of the second part is larger than the uniform width of the first part.

4. The touch window of claim 1 , wherein a minimum width of the second part is same as the uniform width of the first part.

5. The touch window of claim 1 , wherein distances between two adjacent second parts, in a direction parallel to the side of the wire pad, are decreased as the second part extends from the first part to the wire pad.

6. The touch window of claim 1 , wherein distances between two adjacent second parts are different from a distance between two adjacent first parts.

7. The touch window of claim 1 , wherein a distance between two adjacent first parts, in a direction parallel to the side of the wire pad, is continually the same.

8. The touch window of claim 1 , wherein a width of the second part is different than the uniform width of the first part.

9. The touch window of claim 1 , wherein the sensing electrode includes a plurality of cross points in which the first and second conductive lines cross each other,
wherein a maximum distance between the wire pad and a cross point adjacent to the wire pad is greater than the maximum width of the second part.

10. The touch window of claim 1 , wherein the sensing electrode includes a plurality of cross points in which the first and second conductive lines cross each other,
wherein a maximum distance between the wire pad and a cross point adjacent to the wire pad is greater than the maximum distance between the two adjacent second parts.

11. The touch window of claim 1 , wherein the sensing electrode includes a plurality of cross points in which the first and second conductive lines are cross each other,
wherein a maximum distance between the wire pad and a cross point adjacent to the wire pad is greater than a half of a minimum pitch between the two adjacent second parts.

12. A touch window comprising:
a cover substrate;
an outer dummy layer is formed in an unactive area of the cover substrate and defines the unactive area of the cover substrate;
a substrate having an active area in which a position of an input device is detected and an unactive area provided at a peripheral portion of the active area;
a sensing electrode is provided in an active area and an unactive area of a substrate to sense the input device;
wherein a portion of the sensing electrode overlaps with the outer dummy layer,
a wire is provided in the unactive area for an electrical connection of the sensing electrode; and
an electrode pad is positioned at an end of the wire and connected with a printed circuit board,
wherein the sensing electrode has a mesh shape that includes:
a plurality of first conductive lines extending in a first direction;
a plurality of second conductive lines extending in a second direction; and
an opening is formed by the first and second conductive lines,
wherein the wire includes a wire pad which includes a side in contact with the sensing electrode,
wherein the first conductive lines and the second conductive lines cross each other,
wherein the first conductive lines include a first part having a uniform width in the first direction and a second part disposed between the wire pad and the first part having a varied width in the first direction,
wherein the first part is provided in the active area of the substrate and the second part is provided in the unactive area of the substrate and overlaps with the outer dummy layer,
a maximum width of the second part is less than a half of a minimum distance between two adjacent second parts,
wherein the sensing electrode, the wire and the electrode pad are formed by etching metallic material on the substrate,
wherein the sensing electrode, the wire and the electrode pad have a same material including Ni, Cu, Al, Ag, or an alloy thereof,
wherein a maximum distance between top edges of the two adjacent second parts is greater than a width of the opening, in which the width of the opening is defined as a distance between two adjacent first conductive lines.

13. A touch device comprising:
a display panel having a thin film transistor, a pixel electrode and a panel substrate; and
a touch window on the display panel,
wherein the touch window comprising:
a cover substrate;
an outer dummy layer is formed in an unactive area of the cover substrate and defines the unactive area of the cover substrate;
a substrate having an active area in which a position of an input device is detected and an unactive area provided at a peripheral portion of the active area;
a sensing electrode is provided in the active area and the unactive area of the substrate to sense the input device;
wherein a portion of the sensing electrode overlaps with the outer dummy layer,
a wire is provided in the unactive area for an electrical connection of the sensing electrode; and
an electrode pad is positioned at an end of the wire and connected with a printed circuit board,
wherein the sensing electrode has a mesh shape that includes:
a plurality of first conductive lines extending in a first direction;
a plurality of second conductive lines extending in a second direction; and
an opening is formed by the first and second conductive lines,
wherein the wire includes a wire pad which includes a side in contact with the sensing electrode,

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Jae Hong
• Koo Chan Kyu
• Kim Hyun Soo
• Shin Jun Sik
• Yang Joon Hyuk

Classifications

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F3/0445 Primary

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/045

  using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact · CPC title