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