Multicolor Electroluminescent Element

摘要

The electroluminescent (EL) element comprises a transparent plastic film substrate ( 1 ) onto whose rear side a transparent first electrode layer ( 2 ) comprised of indium tin oxide (ITO) is vacuum sputtered. A first electroluminescent layer ( 3 ) with dispersed electroluminophores ( 4 ) is placed on the first electrode layer ( 2 ). This first electroluminescent layer consists of a transparent matrix ( 5 ) into which the electroluminophores ( 4 ) are incorporated ( 4 ). The second electrode layer (rear electrode layer) ( 6 ) is placed on the first electroluminescent layer ( 3 ) or on an insulating intermediate layer (not shown) located thereon. This second electrode layer is insulated toward its side facing away from the first electroluminescent layer ( 3 ) by means of the insulating layer ( 7 ). On the front side, i.e. the visible face, a third electrode layer ( 8 ) comprised of transparent conductive lacquer is applied to the plastic film substrate ( 1 ). A second electroluminescent layer ( 9 ) with dispersed electroluminophores ( 4 ) is placed on the third electrode layer ( 8 ). The fourth electrode layer ( 10 ) comprised of transparent conductive lacquer is placed on said second electroluminescent layer ( 9 ) or on an insulating intermediate layer (not shown) located thereon. This fourth electrode layer ( 10 ) is insulated on the visible face by means of an insulating layer ( 11 ).