An electroluminescence color display screen comprising an organic electroluminescence layer disposed between a patterned base electrode layer and a patterned top electrode layer, and further comprising a color conversion layer and a spectrally selective reflector for improving the color efficiency of...http://www.google.es/patents/US6117529?utm_source=gb-gplus-sharePatente US6117529 - Organic electroluminescence devices and displays
