Dot corrected laser printer

Details Dot corrected laser printer Dot corrected laser printer

1986-02-19

1987-10-13

Goldberg, E. A.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

346 76L, 346160, 358283, 358298, G01D 1500, H04N 140

Patent

active

047002018

ABSTRACT:
To provide a smooth representation in half-tones of a record, the area of a dot recorded by a laser printer is controlled. Binary image information which is applied to the laser printer is examined to determine if it is isolated when it is to be recorded "black". When the laser printer is operated in the background exposure scheme, the off time of the laser which records an isolated "black" is increased whereas when the laser printer is operated in the image exposure scheme, the on time of the laser which records an isolated "black" is reduced. The control of the recorded area per dot is disclosed for one dimension array (in the direction of main scan X) and two dimension array (in the directions of main scan X and subscan Y). Also, the recorded area per dot can be controlled by controlling the transmission of laser beam through an AO modulator in a manner corresponding to the detection of the isolation.

REFERENCES:
patent: 4460909 (1984-07-01), Bassetti et al.
patent: 4553173 (1985-11-01), Kawamura
patent: 4578689 (1986-03-01), Spencer et al.

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