Beam deflecting for resolution enhancement and banding reduction

Details Beam deflecting for resolution enhancement and banding reduction Beam deflecting for resolution enhancement and banding reduction

1995-09-12

1999-07-06

Le, N.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347239, 347243, 347260, 347261, B41J 247

Patent

active

059203366

ABSTRACT:
A system and method of deflecting a laser beam in a laser printer for providing enhanced resolution and reduced banding effects. Specifically, to enhance resolution, the laser beam is borrowed (deflected) from a white space area adjacent an image to double resolution at the edges of the image. Similarly, banding is reduced by deflecting the beam to compensate for drum rotational and translational errors. The beam is deflected using an electro-optic modulator placed between the laser diode and the scanning mirror. Encoders detect drum rotational errors and motion between the optics unit and the drum to provide a closed loop feedback system for reducing banding.

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