A plurality of source signal lines which supplies display data of picture elements, which are sampled at a sampling gate, from a video signal line to a plurality of picture element TFTs arranged in a matrix pattern, and a plurality of gate signal lines that supplies a control signal for controlling the picture element TFTs and that intersect the source signal lines are provided to a display section. A spare wiring is formed on each source signal line or gate signal line so that the spare wiring intersects only a non-input end of each source signal line or of each gate signal line. A corrective signal supplying circuit for supplying a corrective signal of display data or a corrective signal of the control signal for controlling picture element TFTs is provided to the outside of the display section. As a result, a line breakdown can be completely corrected.