Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-08-24
1983-08-23
Britton, Howard
Facsimile and static presentation processing
Facsimile
Recording apparatus
332 751, 350358, 358285, 358300, H04N 130
Patent
active
044007400
ABSTRACT:
A control for modulating the scanning beam of a raster output scanner in response to both video image signal levels and beam intensity signal levels through a single port modulator driver with linear balanced amplifier. A control circuit combines the video image signals with an analog beam intensity signal to provide a composite image/intensity control signal which is input to the modulator port to regulate scanning beam intensity. The image intensity signals are derived from a memory previously loaded with data reflecting image beam intensity variations across the scan line, the memory output being updated by a signal representing current beam intensity prior to use by the control circuit.
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Keene Douglas L.
Micco Felice A.
Traino James C.
Britton Howard
McMullen Frederick E.
Xerox Corporation
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