An apparatus is also provided for calibrating a sensor which may be used for measuring {TAIL ~ color} of {HEAD ~ a display} in one or more of these methods 
An apparatus is also provided for calibrating a sensor which may be used for measuring { TAIL ~ color } of { HEAD ~ a display } in one or more of these methods
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH