Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1991-12-13
1997-08-12
Reinhart, Mark J.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
347238, 347240, 358298, B41T 245, B41T 247, G01D 1514, H04N 123
Patent
active
056570694
ABSTRACT:
A method and apparatus for grey level printing includes a plurality of recording elements which are enabled for variable periods of time during a cycle of recording grey level pixels. For each recording element a comparator compares the count in a time-changing exposure counter with a multibit grey level data signal. The exposure counter is decremented/incremented by exposure clock pulses from a programmable exposure clock. The exposure clock includes a master clock and an address counter that provides an incremented address signal in response to each set of N pulses from the master clock. The address signal identifies a location in memory of a set of signals used to generate exposure clock pulses. The set of signals is output in parallel to a serial shift register and shifted out serially to form the exposure clock pulses for decrementing/incrementing the exposure counter.
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L.L. Johnson and R.T. Joseph, "Random Timing Generator", IBM Technical Disclosure Bulletin, vol. 12, No. 4, Sep. 1969, p. 614.
Kelly E. Michael
Prowak James R.
Eastman Kodak Company
Reinhart Mark J.
Rushefsky Norman
Yockey David
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