Organic light-emitting diode (OLED) display including touch sensor

1. An organic light-emitting diode (OLED) display, comprising:

a display substrate;

an encapsulation substrate disposed over the display substrate;

a window disposed over the encapsulation substrate, wherein the window includes a surface facing the display substrate;

a contact sensing layer disposed on the surface of the window and comprising a plurality of first touch electrodes and a plurality of second touch electrodes formed on the same layer as the first touch electrodes; and

a plurality of first touch wires respectively electrically connected to the first touch electrodes,

a plurality of second touch wires respectively electrically connected to the second touch electrodes,

a first pad portion formed end portions of the first and second touch wires, and

a touch driver disposed on and in direct contact with the surface of the window and electrically connected to the contact sensing layer, wherein the touch driver is configured to drive the touch sensing layer,

wherein the touch driver is electrically connected to the first pad portion via a touch driver connection pattern,

wherein the touch driver connection pattern are electrically connected to the first pad portion,

wherein at least a portion of the touch driver connection pattern overlaps the first pad portion, and

wherein the portion of the touch driver connection pattern is formed on a different layer from the first pad portion.

2. The OLED display of claim 1 , wherein the first and second touch electrodes are alternately arranged so as to not overlap each other, wherein the first touch electrodes are electrically connected to each other in a first direction via a plurality of first connection portions, and wherein the second touch electrodes are electrically connected to each other in a second direction crossing the first direction via a plurality of second connection portions.

3. The OLED display of claim 2 , wherein the first connection portions are disposed on the same layer as the first touch electrodes and wherein the second connection portions are formed on a different layer from the second touch electrodes.

4. The OLED display of claim 3 , wherein end portions of the first and second touch wires form a first pad portion, and wherein the first touch wires, the second touch wires, and the first pad portion are disposed on the same layer as the first and second touch electrodes.

5. The OLED display of claim 4 , wherein the portion of the touch driver connection pattern is disposed on the same layer as the second connection portions.

6. The OLED display of claim 5 , wherein the touch driver connection pattern and the second connection portions are disposed of the same material.

7. The OLED display of claim 1 , further comprising a touch flexible printed circuit board attached to the surface of the window.

8. The OLED display of claim 7 , wherein the touch flexible printed circuit board is electrically connected to the touch driver.

9. The OLED display of claim 8 , further comprising a display flexible printed circuit board attached to the display substrate.

10. The OLED display of claim 9 , wherein the touch flexible printed circuit board is electrically connected to the display flexible printed circuit board via a connector.

11. The OLED display of claim 1 , wherein the display substrate includes an insulation substrate and a thin film display layer disposed over the insulation substrate.

12. The OLED display of claim 11 , wherein the thin film display layer includes a plurality of pixels and wherein each of the pixels includes an OLED.

13. The OLED display of claim 1 , wherein the display substrate comprises a display area and a peripheral area, wherein the touch driver is disposed in the peripheral area, and wherein the touch driver does not overlap the encapsulation substrate.