Solid-state imaging device, camera system, and signal reading method

A solid-state imaging device comprising:

• a pixel unit in which a plurality of photoelectric conversion devices, in which the amount of accumulated electric charges changes in accordance with incident light, are disposed two-dimensionally;
• an exposure control unit which controls the pixel unit such that the start and end of accumulation of electric charges are performed at the same time in the photoelectric conversion devices which belong to a plurality of rows included in the pixel unit;
• a first read-out path which reads out captured image signals of the photoelectric conversion devices in units of one row during a unit read-out period, a plurality of which is acquired by dividing a read-out period set between a first exposure period in which the captured image signals corresponding to a first frame are accumulated in the photoelectric conversion devices and a second exposure period in which the captured image signals corresponding to a second frame following the first frame are accumulated in the photoelectric conversion devices;
• and
• a second read-out path which reads out reset signals of the photoelectric conversion devices which belong to the same row as the row in which the captured image signals are read out during the unit read-out period.