Two dimensional organic light emitting diode array for high density information image manifestation apparatus

Claim 1

A two dimensional organic light emitting diode array comprising: an electrically insulative supporting substrate; a plurality of laterally spaced apart, electrically conductive strips positioned on a surface of the supporting substrate so as to define a plurality of first electrodes; a layer of dielectric medium positioned on an upper surface of the electrically conductive strips and the supporting substrate and defining a plurality of cavities through the layer of dielectric medium, one each of the plurality of cavities being positioned in overlying relationship to an associated first electrode of the plurality of first electrodes so as to expose a portion of an upper surface of the associated first electrode, and the layer of dielectric medium defining the plurality of cavities with each cavity defining an upper opening substantially equal in area to the exposed portion of the associated first electrode; and an electroluminescent medium, including at least a layer of active emitter material and a layer of a low work function metal, positioned in each of the plurality of cavities on the exposed portion of the associated first electrode so as to form a light emitting diode in each of the plurality of cavities in conjunction with the associated first electrode; and a layer of ambient stable metal sealingly positioned over the cavities so as to electrically contact the low work function metal in each of the cavities and to seal the upper openings in each of the cavities, the layer of ambient stable metal defining a plurality of laterally spaced apart, metallic strips orthogonal to the electrically conductive strips, the laterally spaced apart, metallic strips defining a second electrode for each of the light emitting diodes.