{HEAD ~ an organic layer} formed on the first electrode, the organic layer including {TAIL ~ at least an organic light} emitting layer; and 
{ HEAD ~ an organic layer } formed on the first electrode , the organic layer including { TAIL ~ at least an organic light } emitting layer ; and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH