Intensity control for raster output scanners
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United States of America Patent
Stats
-
Aug 23, 1983
Grant Date -
N/A
app pub date -
Aug 24, 1981
filing date -
Aug 24, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
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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Cited Art Landscape
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