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