Patent ID: 7924378

Claim:
A liquid crystal display, comprising: a thin film transistor array substrate (TFT substrate); a plurality of gate lines disposed on said TFT substrate; a plurality of data lines crossing said gate lines disposed on said TFT substrate; a plurality of first conductive lines disposed on said TFT substrate; and a plurality of readout pixels, wherein each of said readout pixels further comprises: a pixel thin film transistor (pixel TFT); and a photo-sensitive element, wherein said photo-sensitive element further comprises: a switch thin film transistor (switch TFT) having a first gate electrode, a first terminal electrode and a second terminal electrode, wherein said first gate electrode is electrically connected to one of said gate lines and said first terminal electrode is electrically connected to one of said first conductive lines; and a photo thin film transistor (photo TFT) having a second gate electrode, a third terminal electrode and a fourth terminal electrode, wherein the photo TFT is connected between said one of said gate lines and said second terminal electrode to detect a light incident thereon, the first gate electrode of the switch TFT and the second gate electrode of the photo TFT are connected to each other, and the second terminal electrode of the switch TFT and the third terminal electrode of the photo TFT are connected to each other.