Patent ID: 8462287

Claim:
An active matrix substrate comprising: a plurality of video signal lines for transmitting a plurality of video signals; a plurality of scanning signal lines intersecting the plurality of video signal lines; and a plurality of pixel formation portions disposed in a matrix form at respective intersections of the plurality of video signal lines and the plurality of scanning signal lines, wherein each of the pixel formation portions includes: a thin film transistor having a source electrode connected to a video signal line passing through the corresponding intersection and entering a conductive state when a scanning signal line passing through the corresponding intersection is activated; a pixel electrode connected to a drain electrode of the thin film transistor; a conductive plate formed in a position on a side of an intrinsic semiconductor layer serving as a channel region of the thin film transistor opposite to a side of the intrinsic semiconductor layer on which the scanning signal line is formed, so as to cover at least the channel region; and a diode in which an anode and a first cathode are joined, and the anode is connected to the conductive plate, and the first cathode is connected to any one of the video signal line, the pixel electrode, and the scanning signal line.