{HEAD ~ The present invention} relates to light emitting device materials and to {TAIL ~ a light emitting device} which can convert electrical energy into light and can be used for display elements, flat panel displays, back lights, lighting, interiors, signs, signboards, electronic cameras, light signal generators and the like 
{ HEAD ~ The present invention } relates to light emitting device materials and to { TAIL ~ a light emitting device } which can convert electrical energy into light and can be used for display elements , flat panel displays , back lights , lighting , interiors , signs , signboards , electronic cameras , light signal generators and the like
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