{HEAD ~ a transfer element} that is turned on or off by a transfer signal and that transfers the electric charge in the photoelectric conversion element to {TAIL ~ the input node} in an on state, and 
{ HEAD ~ a transfer element } that is turned on or off by a transfer signal and that transfers the electric charge in the photoelectric conversion element to { TAIL ~ the input node } in an on state , and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH