Patent ID: 8659576

Claim:
An Liquid Crystal Display (LCD) with a touch screen function, comprising: an array substrate having a display region and a photosensitive region divided by data lines, scan lines, and common lines, wherein the photosensitive region comprises: a switching element having a first terminal connected to an (n−1) th scan line of the scan lines to receive a select signal and a second terminal connected to a readout system; a charge storage element having a first terminal connected to a third terminal of the switching element and a second terminal connected to the common lines; and a photosensitive element having a first terminal connected to an n th scan line of the scan lines and a second terminal connected to the first terminal of the charge storage element, wherein when the photosensitive element is turned on according to external illuminance, the charge storage element is discharged and the readout system detects a difference of external illuminance.