Patent ID: 7834948

Claim:
An active matrix substrate comprising: an insulating substrate; a plurality of control signal lines arranged on the insulating substrate; a control insulator provided so as to cover the plurality of control signal lines; a plurality of data signal lines arranged on the control insulator so as to intersect with the plurality of control signal lines; a switching element provided in each picture element region, the switching element including a control electrode connected electrically to the corresponding control signal line, a first electrode connected electrically to the corresponding data signal line, and a second electrode arranged on the control insulator; an interlayer insulator having a contact hole in each picture element region and provided so as to cover each switching element; a picture element electrode provided so as to be arranged on the interlayer insulator in each picture element region and connected electrically to the second electrode of the switching element through the contact hole in each picture element region; and an auxiliary capacitor counter electrode arranged so as to be opposed to the second electrode with the control insulator interposed for forming an auxiliary capacitor between itself and the second electrode, wherein an opening is formed in a part of the auxiliary capacitor counter electrode which corresponds to a region of the contact hole.