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