Touch screen panel for display device

• US 9,229,554 B2
• Filed: 12/11/2012
• Issued: 01/05/2016
• Est. Priority Date: 09/11/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Cho, Sungyong
• Primary Examiner(s): Wang-Hurst, Kathy
• Assistant Examiner(s): WILSON, DOUGLAS M
• Application Number:
  US13/710,668
• Publication Number:
  US 20140071064A1
• Time in Patent Office: 1,120 Days
• Field of Search: None
• US Class Current: 1/1
• 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 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 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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

This disclosure relates to a touch screen panel for a display device. The touch screen panel includes a base layer, a plurality of first electrode strings, a plurality of second electrode strings, a plurality of first routing wires, a plurality of second routing wires; a third wire formed between the first routing wires and the second routing wires, an insulation layer that covers the first and second routing wires and the third wires and has contact holes exposing a part of the third wire, and a shield pattern that is formed on the insulation layer contacts the third wires through the contact holes, and overlaps either the first routing wires or the second routing wires.

Claims

1. A touch screen panel for a display device comprising:

a base layer having a touch area, a routing wire area, and a pad area;

a plurality of first electrode strings formed in the touch area of the base layer and arranged in a first direction;

a plurality of second electrode strings formed in the touch area of the base layer and arranged in a second direction crossing the first direction;

a plurality of first routing wires formed in the routing wire area of the base layer and respectively connected to the plurality of first electrode strings;

a plurality of second routing wires formed in the routing wire area of the base layer and respectively connected to the plurality of second electrode strings;

a third wire formed in the routing wire area of the base layer and formed between the first routing wires and the second routing wires;

an insulation layer that covers the first and second routing wires and the third wire and has contact holes exposing at least a portion of the third wire; and

a shield pattern that is formed on the insulation layer in the routing wire area of the base layer, contacts the third wire through the contact holes, and overlaps at least either the first routing wires or the second routing wires,

wherein the contact holes are disposed between the first routing wires and the second routing wires,

wherein the shield pattern is formed over the entire routing wire area,

wherein the shield pattern has an L-shape, and

wherein the third wire is between the shield pattern and the base layer.

2. The touch screen panel of claim 1, wherein the third wire is grounded.

3. The touch screen panel of claim 1, wherein the contact holes of the insulation layer expose the top surface of the entire length of the third wire.

4. The touch screen panel of claim 1, wherein the shield pattern overlaps with both of the first and second routing wires, with the insulation layer interposed therebetween.

5. The touch screen panel of claim 1, wherein the shield pattern overlaps at least one of the first routing wires, with the insulation pattern interposed therebetween.

6. The touch screen panel of claim 1, wherein the shield pattern overlaps with at least one of the second routing wires, with the insulation layer interposed therebetween.

7. The touch screen panel of claim 1, wherein the third wire does not cross connection portions connecting the plurality of first electrode strings to the plurality of first routing wires and the plurality of second electrode strings to the plurality of second routing wires.

8. The touch screen panel of claim 1, wherein the third wire is formed entirely between the first routing wires and the second routing wires, the third wire having a terminal end between the first routing wires and the second routing wires.

9. The touch screen panel of claim 1, wherein the shield pattern is formed of a transparent conductive material.

10. The touch screen panel of claim 9, wherein the transparent conductive material is at least one of indium tin oxide, indium zinc oxide, gallium-doped zinc oxide, a transparent metal mesh electrode, a metal nanowire, and a carbon-based transparent electrode.

11. The touch screen panel of claim 1, wherein the third wire is formed of a metal material.

12. The touch screen panel of claim 1, wherein the first routing wires extend to a first side of the touch area, and the second routing wires extend to a second side of the touch area, wherein the second side of the touch area is perpendicular to the first side, a first part of the L-shape of the shield pattern overlapping the first routing wires, and a second, perpendicular part of the L-shape of the shield pattern overlapping the second routing wires.