Multilevel image printing device

Details Multilevel image printing device Multilevel image printing device

1981-06-10

1984-02-28

Tarcza, Thomas H.

Recorders

Electric recording

Electrochemical

346160, 358298, G01D 1514

Patent

active

044344317

ABSTRACT:
A multilevel image printing device in which a laser beam is scanned onto the surface of a photoconductive drum with plural intensity levels without the use of a modulator. A multilevel image outputting circuit produces a multilevel signal which is applied to a multilevel image signal to laser beam conversion circuit which converts it into an intensity value for operating a semiconductor laser beam source. The multilevel image signal to laser beam conversion circuit includes plural switches which are operated in response to the multilevel image signal coupled through resistors of different values which determine the voltage applied to the semiconductor laser beam source.

REFERENCES:
patent: 3698006 (1972-10-01), Ovshinsky
patent: 4197560 (1980-04-01), Minerd
patent: 4251825 (1981-02-01), Mikami et al.
patent: 4375064 (1983-02-01), Ohara

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