National Research Council of Canada

Robert C Bajcar

Jerzy A Dobrowolski

Brian T Sullivan

An optical interference electroluminescent device having low reflectance comprises three layers forming an electroluminescent transparent front electrode, a counter electrode and an electroluminescent layer between the electrodes, with or without dielectric layers between them, and at least one optical interference film layer sandwiched between two of the layers or at the faces of the electrodes. The optical interference layer comprises at least one transparent optical interference film and is in interfacial contact with a layer so that the reflectance of ambient light by the device is reduced by optical interference at the interfaces between the layers and the film(s). The optical interference layer(s) may include at least one partially absorbing film. The device may have arrays of electrodes forming pixels.

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Bramalea, Canada

Robert C Bajcar