Image pickup device

An image pickup device comprising:

• an imaging element for imaging a subject;
• and
• a drive signal supplying portion for supplying a drive signal to the imaging element so as to drive the imaging element;
• wherein the imaging element comprises a plurality of pixel units arranged in a matrix form;
• each of the pixel units comprises:
• a photoelectric conversion element for converting incident light from the subject photoelectrically into a signal charge;
• a readout transistor for reading the signal charge converted photoelectrically by the photoelectric conversion element;
• an accumulated element for accumulating the signal charge read by the readout transistor;
• a detection transistor for detecting a voltage signal based on the signal charge accumulated in the accumulated element;
• and
• a reset transistor for supplying a reset potential to the accumulated element based on the drive signal supplied by the drive signal supplying portion after the voltage signal is detected by the detection transistor so that the signal charge is reset,
• wherein the readout transistor has a gate terminal to which a gate potential for reading the signal charge is supplied, and the readout transistor reads the signal charge when the gate potential to be supplied to the gate terminal is changed from a first state to a second state,
• wherein the detection transistor detects the voltage signal after the gate potential to be supplied to the gate terminal of the readout transistor is changed from the second state to the first state, and
• wherein the reset potential supplied from the reset transistor to the accumulated element has an intermediate potential between the gate potential in the first state that is supplied to the gate terminal of the readout transistor and a predetermined VDD potential.