An organic light emitting diode (OLED) display comprising: a plurality of subpixels on one surface of a first substrate; a second substrate attached to the first substrate and facing the subpixels; a shield electrode on one surface of the second substrate that is not facing the subpixels, the shield electrode being connected to a low potential voltage source; a touch screen panel on a surface of the shield electrode facing away from the second substrate; a first printed circuit board attached to the one surface of the first substrate, the first PCB receiving a driving signal driving the subpixels from a driving device; and a second PCB attached to the one surface of the second substrate, the second PCB transmitting a sensing signal generated by the touch screen panel to an external device, wherein the touch screen panel comprises a single-layered electrode unit, wherein the single-layered electrode unit includes first electrodes, each of the first electrodes is arranged from a left side to a right side of the touch screen panel, the first electrodes being connected to lines (TS1, TS3, TS5,...) at the left side, and second electrodes, each of the second electrodes is arranged from the right side to the left side of the touch screen panel, the second electrodes being connected to lines (TS2, TS4, TS6,...) at the right side, wherein the first electrodes and the second electrodes are positioned on the same layer to be spaced apart from each other at a constant distance, further, the first electrodes and the second electrodes have different areas, so that the first electrodes and the second electrodes have different capacitances, wherein the first and/or the second electrodes (TPL, TPR) form transparent electrodes, wherein the first substrate includes a first pad area extending beyond the second substrate in an attaching direction of the first PCB at one side of the first substrate, and the second substrate includes a second pad area extending beyond the first substrate in an attaching direction of the second PCB at one side of the second substrate. a plurality of subpixels on one surface of a first substrate; a second substrate attached to the first substrate and facing the subpixels; a shield electrode on one surface of the second substrate that is not facing the subpixels, the shield electrode being connected to a low potential voltage source; a touch screen panel on a surface of the shield electrode facing away from the second substrate; a first printed circuit board attached to the one surface of the first substrate, the first PCB receiving a driving signal driving the subpixels from a driving device; and a second PCB attached to the one surface of the second substrate, the second PCB transmitting a sensing signal generated by the touch screen panel to an external device, wherein the touch screen panel comprises a single-layered electrode unit, wherein the single-layered electrode unit includes first electrodes, each of the first electrodes is arranged from a left side to a right side of the touch screen panel, the first electrodes being connected to lines (TS1, TS3, TS5,...) at the left side, and second electrodes, each of the second electrodes is arranged from the right side to the left side of the touch screen panel, the second electrodes being connected to lines (TS2, TS4, TS6,...) at the right side, wherein the first electrodes and the second electrodes are positioned on the same layer to be spaced apart from each other at a constant distance, further, the first electrodes and the second electrodes have different areas, so that the first electrodes and the second electrodes have different capacitances, wherein the first and/or the second electrodes (TPL, TPR) form transparent electrodes, wherein the first substrate includes a first pad area extending beyond the second substrate in an attaching direction of the first PCB at one side of the first substrate, and the second substrate includes a second pad area extending beyond the first substrate in an attaching direction of the second PCB at one side of the second substrate.