Operation method of imaging device

An operation method of an imaging device comprising a pixel;

• wherein the pixel includes a photoelectric conversion element, a first transistor, a second transistor, a third transistor, and a capacitor,
• wherein one electrode of the photoelectric conversion element is electrically connected to one of a source and a drain of the first transistor,
• wherein the other of the source and the drain of the first transistor is electrically connected to a gate of the second transistor,
• wherein the gate of the second transistor is electrically connected to one of a source and a drain of the third transistor,
• wherein the one of the source and the drain of the third transistor is electrically connected to one electrode of the capacitor,
• resetting a gate potential of the second transistor by setting the third transistor in an on state in a first period,
• writing imaging data corresponding to illuminance of light delivered to the photoelectric conversion element to the pixel by supplying a first potential to the other electrode of the capacitor and setting the first transistor in an on state and the third transistor in an off state in a second period, and
• reading the imaging data from the pixel by supplying a second potential to the other electrode of the capacitor in a third period.