Disclosed is a thin film electroluminescent device of this invention comprising a transparent substrate, a transparent electrode, a fluorescent layer emitting a light when being charged with a certain voltage, a first and second insulating layer being laminated on the top and the bottom of the fluorescent...http://www.google.fr/patents/US5352543?utm_source=gb-gplus-shareBrevet US5352543 - Structure of thin film electroluminescent device
