AC-DC HYBRID TYPE THIN FILM EL

摘要

PURPOSE: An AC-DC hybrid type thin film EL(ElectroLuminescence) is provided to emit natural colors of high purity and high brightness and enhance the emission efficiency by selecting a drive circuit suitable to the luminescence characteristics according to respective colors. CONSTITUTION: An AC drive type single EL for emitting a plurality of colors and a DC drive type single EL for emitting a plurality of colors are formed on one substrate(11). The AC drive type single EL comprises a transparent anode(12), a fluorescent layer(13), an electron supply and electron acceleration layer(14) and a metal cathode(16) sequentially formed in their order. The DC drive type single EL comprises a transparent anode(12), a lower insulating layer(17), a fluorescent layer(13), an upper insulating layer(18) and a metal cathode(16).