Patent ID: 7594839

Claim:
A method of forming a top-emitting organic light-emitting diode (OLED) device, comprising the steps of: forming an OLED having a pre-determined refractive index over a substrate, the OLED comprising a reflective electrode; one-or-more layers of organic light-emitting material formed over the reflective electrode; and a transparent electrode formed over the one-or-more layers of organic light-emitting material; coating a dispersion comprising a solvent, visible-light-scattering transparent particles having a refractive index greater than the OLED pre-determined refractive index, and an adhesive binder over the OLED; drying the coated dispersion to adhere the visible-light-scattering particles to the OLED with the adhesive binder thereby forming a visible-light-scattering layer having a rough surface; and affixing a cover to the substrate while forming a vacuum gap or forming and filling a gap with a gas having a refractive index less than the OLED pre-determined refractive index between the cover and the visible-light-scattering layer into which visible-light-scattering particles project from the rough surface of the visible-light-scattering layer without contacting the cover.