{HEAD ~ A light emitting device} is disposed at {TAIL ~ an edge} of one of the substrates, such as the lower substrate 
{ HEAD ~ A light emitting device } is disposed at { TAIL ~ an edge } of one of the substrates , such as the lower substrate
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH