System and method for controlling voltages of elements in an ele

Details System and method for controlling voltages of elements in an ele System and method for controlling voltages of elements in an ele

1992-12-16

1994-11-22

Braun, Fred L.

Photocopying

Contact printing

Light boxes

355214, G03G 1502, G03G 1504, G03G 2100

Patent

active

053673611

ABSTRACT:
A method of controlling voltages in a latent image development printer. A printer controller receives three parameters and determines a substrate charging voltage, a development station bias voltage, and a laser power for discharging the substrate, based on the three parameters. The three parameters include a difference between a substrate charging voltage and the development station bias voltage, a difference between the substrate discharging voltage and the development station bias voltage, and a ratio between the discharging voltage minus a residual voltage and the charging voltage minus the residual voltage. The ratio parameter controls the optical density of intermediate gray levels without substantially affecting other qualities of the printing process.

REFERENCES:
patent: 5119131 (1992-06-01), Paolini et al.
patent: 5138378 (1992-08-01), MacDonald et al.
patent: 5208632 (1993-05-01), Hurwitch et al.
patent: 5223897 (1993-06-01), MacDonald et al.
patent: 5227270 (1993-07-01), Scheuer et al.

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