A plurality of circuits are each connected with one of a plurality of power supply lines disposed in a direction perpendicular to a predetermined direction. A signal processing part processes a pixel signal that is output via a signal line commonly connected with a predetermined number of adjacent pixel circuits in the predetermined direction from among a plurality of pixel circuits. A power path opening/closing part opens and closes a path between each of the plurality of power supply lines and a power supply. A common path opening/closing part opens and closes a path between each of the plurality of power supply lines and the signal line.