Imaging device, electronic device, and light detecting method

An electronic device comprising an imaging device including:

• a photoelectric conversion circuit that generates a pixel signal corresponding to a luminance of incident light;
• a first amplifier circuit that reads the pixel signal in a first period;
• a second amplifier circuit that reads the pixel signal in a second period subsequent to the first period;
• an adding circuit that adds a first output signal of the first amplifier circuit and a second output signal of the second amplifier circuit;
• and a comparator circuit that detects a change of the luminance on a basis of a third output signal of the adding circuit.

A light detecting method comprising:

• generating a pixel signal corresponding to a luminance of incident light;
• reading the pixel signal in a first period by a first amplifier circuit;
• reading the pixel signal in a second period subsequent to the first period by a second amplifier circuit different from the first amplifier circuit;
• adding a first output signal of the first amplifier circuit and a second output signal of the second amplifier circuit by an adding circuit;
• and
• detecting a change of the luminance on a basis of a third output signal of the adding circuit.