Electroluminescent information display panels are disclosed suitable for uses extending from simple numeric displays to color TV panels. The new panel consists of an unpatterned layer of electroluminescent powder particles of thickness equal to that of one particle embedded in a high-dielectric resin...http://www.google.de/patents/US4143297?utm_source=gb-gplus-sharePatent US4143297 - Information display panel with zinc sulfide powder electroluminescent layers
