Patent ID: 7902748

Claim:
An electroluminescent (EL) device, comprising: a substrate; a light-emitting area formed over the substrate and comprising first and second electrodes and one or more EL unit(s) comprising at least one light-emitting layer formed between the electrodes, wherein at least one electrode comprises a transparent electrode; a cover located over the light-emitting area; and a light-scattering layer located between the substrate and cover, comprising transparent, light-scattering particles wherein the ratio of the volume of the transparent, light-scattering particles to the volume of the light-scattering layer is greater than 0.55 over the light-emitting area, wherein either the substrate or cover is transparent and transmits light emitted from the EL unit(s), wherein all the transparent, light-scattering particles in the light-scattering layer have a diameter of 0.5 to 2 microns.