A light emitting device 312 can be disposed at {HEAD ~ the edge} of {TAIL ~ the first substrate} 310 
of
A light emitting device 312 can be disposed at { HEAD ~ the edge } of { TAIL ~ the first substrate } 310
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH