Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1998-01-07
2000-10-24
Le, N.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
347236, B41J 2455
Patent
active
061375225
ABSTRACT:
The present invention is a method and apparatus for digitally controlling the output of multiple laser diodes in a system that forms a plurality of scan lines in a Raster Output Scanning (ROS) system. Output of the laser diodes is digitally controlled by monitoring and controlling the bias and run level power for each of the laser diodes. The system employs predetermined, controllable biasing currents to increase the resolution of the exposure current and thereby accurately control the output power of each of the multiple laser diodes, and to provide a fixed exposure level that is detectable by a low-cost start-of-scan detector.
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Hoover Martin E.
Melino Robert H.
Basch Duane
Krishnan Aditya
Le N.
Nguyen Lamson D.
Xerox Corporation
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