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Technology > Image Formation System > Controls > Image stabilization control
Technology > Image Formation System > Controls > Image stabilization control
● Color displacement correction control
This control corrects uneven exposure of the laser scanner unit or color displacement caused
by uneven rotation of the drum or ITB
DC controller(UN1)
ITB belt
Registration sensor
(rear)
(UN48)
Patch sensor
(Center)
(UN49)
Patch sensor
(front)
(UN47)
F-2-103
Control detail
1) DC Controller creates the patch pattern of each color on the ITB.
2) DC Controller compares those patterns with the standard value backed up in the DC
Controller by reading the patch sensor (front, center, rear) (UN47 to 49) and detects the
color displacement amount.
3) Based on the detected result as above, the DC Controller executes correction depending
on the color displace amount.
Control type
Timing to start
Control description
At
power
ON
During
print
for
every
360
prints
in total During
print
for
every
100
prints
in total
Correction in
main scanning
direction
Write-start
correction
Yes Yes Yes Change write-start timing in main
scanning direction
Correction
of overall
magnification ratio
Yes Yes No
Increase/reduce the number of pixels in
main scanning direction (at both edges
of image)
Correction of odd
magnification ratio Yes Yes No
Increase/reduce the number of pixels
in main scanning direction (at center of
image)
Correction in
sub scanning
direction
Write-start
correction
Yes Yes No Change write-start timing in sub
scanning direction
Correction of
skewed image
Yes Yes No Change position of laser exposure by
the laser scanner unit
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