Photocopying – Including fiber optics
Patent
1984-03-09
1987-05-26
Prescott, A. C.
Photocopying
Including fiber optics
355 1, 355 5, 350331R, 340794, G03G 1500
Patent
active
046680713
ABSTRACT:
A liquid crystal display is provided on the surface of a vidicon face plate. A number of conductive pins or electrodes connect to associated field effect transistors imbedded in the liquid crystal display for selectively energizing discrete areas in the liquid crystal display; the pins extend through the vidicon face plate. The electron beam of the vidicon is scanned sequentially across the terminals, and is turned on and off in accordance with stored binary data to impinge upon and selectively activate certain ones of the pins or electrodes, turning on the associated FET. After the full face of the vidicon has been scanned to form the desired pattern of activated FET's, a voltage is applied across the liquid crystal display. The area opposite each turned on FET will be appropriately polarized presenting a display on the outward facing surface of the display. This display is used to excite a photoconductive drum such as in an electrostatic photocopier to print a copy of the display data.
REFERENCES:
patent: 3824604 (1974-07-01), Stein
patent: 4141641 (1979-02-01), Nagai et al.
patent: 4297022 (1981-10-01), Lester
Prescott A. C.
Ricoh & Company, Ltd.
Ricoh Systems, Inc.
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