Electro-optical light shutter device

Details Electro-optical light shutter device Electro-optical light shutter device

1987-10-14

1989-08-08

Laroche, Eugene R.

350355, G02F 101, G02F 103

Patent

active

048546780

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.

REFERENCES:
patent: 3555454 (1971-01-01), Myers et al.
patent: 3619031 (1971-11-01), Amstel
patent: 3900248 (1975-08-01), Nagasaki
patent: 4166230 (1979-08-01), Luft
patent: 4222638 (1980-09-01), Robert
patent: 4289384 (1981-09-01), Samek
patent: 4516838 (1985-05-01), Bademian
patent: 4707081 (1987-11-01), Mir

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