A display overlay includes a contrast media layer and a photoconductive layer disposed between two electrodes. Light from an emissive display strikes the photoconductive layer and lowers the impedance of the photoconductive layer at the point at which the light is incident. Voltage applied to the electrodes...http://www.google.fr/patents/US6704133?utm_source=gb-gplus-shareBrevet US6704133 - Electro-optic display overlays and systems for addressing such displays
Electro-optic display overlays and systems for addressing such displays
