A thin-film electroluminescence (EL) device capable of displaying multiple colors has a laminated structure wherein back electrodes in stripes, a lower dielectric layer, a luminescence layer, an upper dielectric layer and transparent electrodes in stripes are sequentially formed on a transparent substrate...http://www.google.de/patents/US5239228?utm_source=gb-gplus-sharePatent US5239228 - Thin-film electroluminescence device for displaying multiple colors with groove for capturing adhesive
