OLED DISPLAY DEVICE HAVING TOUCH SENSOR AND METHOD OF MANUFACTURING THE SAME

• US 20140152912A1
• Filed: 09/11/2013
• Published: 06/05/2014
• Est. Priority Date: 11/30/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Choi, Jinwook, Lee, Namseok, Kook, Yunho, Lee, Junghwan, Yoo, Taeyeon, Han, Yonghee, Hong, Sunggon
• Granted Patent: US 9,853,092 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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 OLED display device having a touch sensor is provided. The touch sensor includes a base layer; a plurality of first touch electrodes arranged in a first direction on a first surface of the base layer; a plurality of second touch electrodes arranged in a second direction crossing the first direction on a second surface of the base layer; a plurality of first routing wires connected to the first touch electrodes on the first surface of the base layer, respectively; a plurality of second routing wires separated from the plurality of first routing wires and formed on the first surface of the base layer; and a plurality of third routing wires connected to the second routing wires respectively via holes, and formed on the second surface of the base layer. The base layer is one of a barrier layer, an anti-scratch layer, and a circular polarization layer.

Claims

1. An organic light emitting diode (OLED) display device having a substrate on which organic light emitting diodes (OLEDs) and a passivation film for protecting the OLEDs are formed, and a touch sensor disposed on the substrate, the touch sensor comprising:

a base layer;

a plurality of first touch electrodes arranged in a first direction on a first surface of the base layer;

a plurality of second touch electrodes arranged in a second direction crossing the first direction on a second surface of the base layer;

a plurality of first routing wires connected to the plurality of first touch electrodes on the first surface of the base layer, respectively;

a plurality of second routing wires separated from the plurality of first routing wires and formed on the first surface of the base layer; and

a plurality of third routing wires connected to the plurality of second routing wires respectively via holes, and formed on the second surface of the base layer,

wherein the base layer is one of a barrier layer, an anti-scratch layer, and a circular polarization layer.

2. The OLED display device of claim 1, wherein the circular polarization layer disposed on the touch sensor, wherein the base layer is one of the barrier layer and the anti-scratch layer.

3. The OLED display device of claim 1, further comprising a linear polarization layer disposed on the touch sensor, wherein the base layer is the circular polarization layer.

4. The OLED display device of any one of claim 1, further comprising an inorganic layer disposed between the base layer and the second touch electrodes and the third routing wires.

5. The OLED display device of claim 1, wherein each of the holes is a through hole passing through the second routing wire, the base layer, the inorganic layer, and the third routing wire.

6. The OLED display device of claim 1, wherein each of the holes is a contact hole passing through the base layer, the inorganic layer, and the third routing wires to expose the third routing wire.

7. The OLED display device of claim 1, wherein each of the holes is a contact hole passing through the third routing wire, the inorganic layer, and the base layer to expose the second routing wire.

8. The OLED display device of claim 5, further comprising a plurality of connectors filled within the holes to connect the second routing wires to the third routing wires, respectively.

9. The display device of claim 1, wherein each of the first and second touch electrodes is formed of a transparent conductive layer.

10. The display device of claim 1, wherein each of the first, second and third routing wires is formed of a transparent conductive layer and metal layer.

11. A method of manufacturing an organic light emitting diode (OLED) display device comprising, forming organic light emitting diode (OLEDs) and a passivation film for protecting the OLEDs, and forming a touch sensor on the passivation layer, the forming the touch sensor comprising:

preparing a base layer having a touch electrode forming area and a routing wire forming area;

sequentially forming a transparent conductive layer and a metal layer on a first and a second surfaces of the base layer, respectively;

forming a plurality of first touch electrodes in the electrode forming area of the first surface of the base layer;

forming a plurality of first routing wires connected to the plurality of first touch electrodes in the routing wire forming area of the first surface of the base layer, respectively;

forming a plurality of second routing wires separated from the plurality of first routing wires touch electrodes in the routing wire forming area of the first surface of the base layer;

forming a plurality of second touch electrodes in the electrode forming area of the second surface of the base layer; and

forming a plurality of third routing wires in the routing wire forming area of the second surface of the base layer;

forming at least one hole to pass through at least two excluding the second routing wire or the third routing wire of the second routing wire, the base layer, and the third routing wire; and

filling metal material within the hole to form a connector connecting the second routing wire to the third routing wire.

12. The method of claim 11, wherein the forming the first and the second touch electrodes, and the first, the second and the third routing wires includes:

forming the plurality of first touch electrodes, the plurality of first routing wires, and the plurality of second routing wires by using a first mask, each of them including the transparent conductive layer and the metal layer;

forming the plurality of second touch electrodes and the plurality of third routing wires by using a second mask, each of them including the transparent conductive layer and the metal layer;

forming the plurality of first touch electrodes in which the metal layer is removed by using a third mask; and

forming the plurality of second touch electrodes in which the metal layer is removed by using a fourth mask.

13. The method of claim 11, wherein the plurality of first touch electrodes, the plurality of first routing wires, and the plurality of second routing wires are simultaneously formed, and the plurality of second touch electrodes and the plurality of third routing wires are simultaneously formed.

14. The method of claim 11, wherein the plurality of first touch electrodes, the plurality of first routing wires, the plurality of second routing wires, the plurality of second touch electrodes and the plurality of third routing wires are simultaneously formed.

15. The method of claim 11, after the base layer is prepared, further forming inorganic film on the second surface of the base layer,

wherein the plurality of second touch electrodes and the plurality of third routing wires are formed on the inorganic film.

16. The method of claim 11, wherein the hole is formed by any one of a laser drill method, a computerized numerical control (CNC) method, and a punching method.

17. The method of claim 11, wherein the connector is formed by any one of a screen printing method, a dispense method, an inkjet method, and an electroplating method.