Image forming apparatus

Details Image forming apparatus Image forming apparatus

2008-12-03

2011-10-04

Tran, Huan (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

Reexamination Certificate

active

08031220

ABSTRACT:
An image forming apparatus includes an image bearing member configured to bear an image, an exposure unit configured to draw a scanning line on the image bearing member by exposing the image bearing member according to image data, and at least two detection units configured to detect an amount of deviation in exposing position due to the exposure unit. The image forming apparatus further includes a drive unit configured to drive an optical part located on an optical path extending from the exposure unit to the image bearing member to reduce the amount of deviation, a measurement unit configured to measure an amount of driving of the drive unit, an estimation unit configured to estimate a residual amount of deviation, and a modulation unit configured to modulate a writing frequency in the exposure unit based on the measured amount of driving to reduce the estimated residual amount of deviation.

REFERENCES:
patent: 2006/0132880 (2006-06-01), Amada et al.
patent: 2004-170755 (2004-06-01), None
patent: 2004-333994 (2004-11-01), None
patent: 2006-184526 (2006-07-01), None

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