{HEAD ~ Display pixels} and sensor pixels of {TAIL ~ an EL display} each have an EL element, and the sensor pixels each have a diode 
of
{ HEAD ~ Display pixels } and sensor pixels of { TAIL ~ an EL display } each have an EL element , and the sensor pixels each have a diode
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH