Patent ID: 8810506

Claim:
A liquid crystal display device with touch function, comprising: a plurality of scan lines; a plurality of data lines arranged crossing with the scan lines and whereby dividing the liquid crystal display device into a plurality of pixel regions; a plurality of sensing units disposed in the pixel regions respectively, wherein each of the sensing units comprises: a first transistor comprising: a first control terminal electrically coupled to a corresponding one of the scan lines; a first terminal; and a second terminal; a reference capacitor electrically directly coupled between another one of the scan lines adjacent to the corresponding scan line and the second terminal of the first transistor; a liquid crystal capacitor electrically directly coupled between the second terminal of the first transistor and a common potential, and a capacitance value of the liquid crystal capacitor being altered in compliance with a degree of the sensing unit being pressed; wherein the first terminal of the first transistor is electrically directly coupled to the readout line and thereby the first potential is provided from the readout line to the first terminal when the first transistor is switched on.