Photoelectric conversion device, photoelectric conversion system, and method for driving photoelectric conversion device

A photoelectric conversion device, comprising a light receiving region having a plurality of regions, and first and second signal lines,

• the regions each including unit cells, an adder section, and a signal output section,
• the unit cells each including a plurality of photoelectric converters and a cell output section,
• wherein the cell output section outputs to the first signal line first signals each based on a signal of each of the plurality of photoelectric converters,
• the first signals are input from the first signal line to each of the adder sections,
• the adder sections each generate a sum signal resulting from addition of signals of the plurality of photoelectric converters and output the sum signal to each of the signal output sections, and
• the signal output sections output second signals based on the sum signals to the second signal line.

A method for driving a photoelectric conversion device,

• the photoelectric conversion device including a plurality of regions provided in a light receiving region and first and second signal lines,
• the regions each including unit cells, a signal holding section, and a signal output section,
• the unit cells each including a plurality of photoelectric converters and a cell output section,
• the method comprising:
• outputting to the first signal line by each of the cell output sections of first signals each based on each of signals of the plurality of photoelectric converters and a second signal based on a sum signal resulting from addition of signals of the plurality of photoelectric converters;
• holding by each of the signal holding sections of the second signals;
• and
• outputting to the second signal line by the signal output sections of signals based on the second signals held by the signal holding sections,
• wherein the signal holding section of one of the regions performs holding the second signal in a period, and the signal holding section of the other one of the regions performs holding the second signal in at least one part period overlapped with the period.