OLED display device having touch sensor and method of manufacturing the same

• US 9,853,092 B2
• Filed: 09/11/2013
• Issued: 12/26/2017
• Est. Priority Date: 11/30/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Lee, Namseok, Kook, Yunho, Lee, Junghwan, Yoo, Taeyeon, Han, Yonghee, Hong, Sunggon, Choi, Jinwook
• Primary Examiner(s): Ketema, Benyam
• Application Number:
  US14/023,662
• Publication Number:
  US 20140152912A1
• Time in Patent Office: 1,567 Days
• Field of Search: 345173
• 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 having a first outer surface and a second outer surface that are opposite to each other;

a plurality of first touch electrodes arranged directly on the first outer surface of the base layer;

an inorganic layer directly on the second outer surface of the base layer;

a plurality of second touch electrodes arranged directly on the inorganic layer in a direction perpendicular to the first touch electrodes;

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

a plurality of third routing wires connected to the plurality of second routing wires respectively via holes that pass through the base layer, and formed on the second outer 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 claim 1, wherein the inorganic layer disposed between the base layer and the third routing wires.

5. The OLED display device of claim 4, 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 4, 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 4, 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. The display device of claim 1, wherein the base layer is formed from optical isotropy material having non-elongation property.

12. The display device of claim 1, wherein at least one of the first, second and third routing wires has a double-layer structure including a first layer formed of a transparent conductive material and a second layer formed of a metal material.

13. The display device of claim 1, wherein the first touch electrodes and the second touch electrodes are separated from each other by the base layer and the inorganic layer.