U.S. Philips Corporation

David B Braun

Dirk Jan Broer

Antonius H Venhuizen

Christianne Rm De Witz

An illumination system has an active layer which includes an electroluminescent material, the active layer being located between an optically transparent electrode layer and a reflective electrode layer. A reflective polarizer is present at a side of the transparent electrode layer facing away from the active layer. A sub-beam incident on the polarizer and having an unwanted polarization is reflected back to the active layer, where it is again partially depolarized to recover a component having the desired state of polarization. The invention also relates to a flat-panel picture display device which includes such an illumination system.

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San Luis Obispo, CA, United States of America

David B Braun