LIQUID CRYSTAL DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To obtain a liquid crystal display device with little image display failure or deterioration. SOLUTION: The device has a common wire 502, gate wire 503, source wire 204 and alignment film in the outer peripheral region of a liquid crystal cell. The alignment film is insulated by an insulating film from the gate wire 503 and the source wire 204. The common wire 502 has a common potential exposed part 401 through an opening formed in the insulating film and electrically connected with the alignment film. Since the common voltage which is near the average voltage of the cell is supplied on the alignment film, display failure in the screen or deterioration caused by impurity ions remaining on the surface of the alignment film or in the alignment film can be prevented.