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