Imaging device and camera system, and driving method of imaging device

A imaging device comprising:

• a photoelectric convertor that includes a first electrode, a second electrode, and a photoelectric conversion layer located between the first electrode and the second electrode, wherein
• the photoelectric convertor has a photoelectric conversion characteristic in which a rate of change of the photoelectric conversion efficiency of the photoelectric convertor with respect to a bias voltage between the first electrode and the second electrode is linear when the bias voltage is in a first voltage range, and
• a first voltage is applied to the first electrode or the second electrode so that the bias voltage between the first electrode and the second electrode exists in the first voltage range.

A imaging method for an imaging device that comprising a photoelectric convertor that includes a first electrode, a second electrode, and a photoelectric conversion layer located between the first electrode and the second electrode, wherein the photoelectric convertor has a photoelectric conversion characteristic in which a rate of change of the photoelectric conversion efficiency of the photoelectric convertor with respect to a first bias voltage between the first electrode and the second electrode when the first bias voltage is in a first voltage range, is greater than the rate of change with respect to a second bias voltage when the second bias voltage is in a second voltage range that is higher than the first voltage range, the imaging method comprising:

• supplying a first voltage to the first electrode or the second electrode so that a bias voltage between the first electrode and the second electrode exists in the first voltage range.