Patent ID: 7531955

Claim:
An organic light-emitting diode (OLED) device, comprising: a substrate; an OLED formed on the substrate comprising a first electrode formed over the substrate, one or more layers of organic material, one of which emits light, formed over the first electrode, and a transparent second electrode formed over the one or more layers of organic material, the transparent second electrode and layer(s) of organic light-emitting material having a first refractive index range, wherein one of the first or second electrodes is patterned to form a plurality of separated light-emissive areas; a transparent cover provided over the OLED through which light from the OLED is emitted, the cover having a second refractive index; separately formed transparent spacer element particles having a first average size distributed above the transparent second electrode in one or more of the separated light-emissive areas, providing spacing between the transparent second electrode and the cover, and forming a transparent gap between the transparent second electrode and the cover, the transparent gap having a third refractive index lower than each of the first refractive index range and second refractive index; and separately formed transparent light-scattering element particles distributed over, and in contact with, the transparent second electrode between the spacer element particles, having a second average size smaller than the first size and for scattering light emitted by the light-emitting layer.