An electroluminescent (EL) material is sandwiched between parallel strips of electrodes running at right angles to each other. Pixels are formed where the electrodes cross to provide a thin film, EL display. The display includes a layer of insulating material which has a hole at each pixel. The backside...http://www.google.es/patents/US4670690?utm_source=gb-gplus-sharePatente US4670690 - Thin film electrolumenescent display panel
