Patent ID: 7907126

Claim:
A touch screen display device comprising: a common electrode; a base substrate disposed opposite to the common electrode; a display signal line formed on the base substrate; a plurality of pixel electrodes electrically connected with the display signal line; a touch position sensing part formed between the base substrate and the pixel electrodes, the touch position sensing part comprising a sensing electrode formed in a unit pixel area and sensing a change of electrostatic capacitance formed between the common electrode and the sensing electrode, and the change of electrostatic capacitance being generated from a change of distance between the common electrode and the sensing electrode; and a display layer disposed between the common electrode and the pixel electrodes, the display layer including a plurality of micro capsules comprising positively charged pigment particles and negatively charged pigment particles, wherein the sensing electrode comprises a first sensing electrode formed in the unit pixel area forming a first electrostatic capacitance with the common electrode, and a second sensing electrode formed in the unit pixel area forming a second electrostatic capacitance with the common electrode.