Importance

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Abstract

An electro-optical light shutter device for use in electrophotographic printers or the like including an elongated plate having an electro-optical effect, a polarizer and an analyzer disposed on the light incident and emergent side of the plate, respectively. The plate is formed with a first groove extending longitudinally thereof, a second groove parallel to the first groove with a predetermined distance having a smaller depth than the first groove and a plurality of third grooves extending in a direction across the first and second grooves having a smaller depth than the first groove but a larger depth than the second groove, and provided with a plurality of projections aligned longitudinally thereof which are divided by the forming of the first, second and third grooves. A common electrode for the plurality of projections in common and individual electrodes corresponding to the respective projections individually are respectively provided in the first and second groove and connected to a drive circuit for selectively applying an electric field to the projections.

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First Claim