Optical scanning apparatus and color image forming apparatus...

Details Optical scanning apparatus and color image forming apparatus... Optical scanning apparatus and color image forming apparatus...

2007-02-09

2009-06-16

Tran, Huan H (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

Reexamination Certificate

active

07548252

ABSTRACT:
An optical scanning apparatus and a color image forming apparatus using the same, in which streak-shaped density unevenness is reduced to prevent image deterioration: each of scanning surfaces is simultaneously scanned with light beams emitted from light source units and scanning lines are simultaneously drawn on the scanning surfaces; the light beams emitted from at least four light emitting portions of the corresponding light source unit are simultaneously deflected for scanning by a deflecting unit; and image data corresponding to a first scanning line, i.e. a scanning line located on an uppermost stream side in a direction in which the scanning surfaces move among scanning lines, on at least one of the scanning surfaces in a k-th scanning by the deflecting unit is displaced by at least one line space from image data corresponding to a first scanning line on another scanning surface in the k-th scanning.

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European Patent Office Communication dated Aug. 28, 2008 concerning Appln 07250581.1 including Search Report issued Aug. 20, 2008.
Chinese Office Action dated Sep. 26, 2008, received in corresponding Chinese Patent Application No. 2007100789402 with English translation.

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