2
2
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2-68
Technology > Image Formation System > Controls > Image stabilization control
Technology > Image Formation System > Controls > Image stabilization control
4) The Main Controller 2 executes the gradation correction to realize the ideal halftone image
based on this data.
Also, this control creates the standard patch used at ARCDAT control and stores the
standard data for ARCDAT according to the measurement result of UN49. (refer to MEMO.)
ITB
Density data
Video data
DC controller(UN1)
Laser scanner unit 1/2
Main controller2
D-half Control
Patch sensor
(center)
(UN49)
Patch image date
Laser Power output
F-2-98
Start
Patch pattern is created
Patch scanning
Patch sensor(Center)(UN49)
Actual gradation
characteristics
Ideal gradation
characteristics
0
100
Density data
（
D-CON
）
Y1
Y2
Data output
（
V-CON
）
Y9 Y10
Main controller2
DC controller(UN1)
Main controller2
Output of density data
100
Actual gradation
characteristics
Ideal gradation
characteristics
0
100
Density data
（
D-CON
）
Data output
（
V-CON
）
100
DC controller(UN1)
D-half correction table is
created
（
Y,M,C,Bk
）
Output of patch pattern data
(Y)D-half correction table
MEMO:
Following 4 types of patch patterns are created on this control.
• Copy pattern (10 patch per each color)
• Letter priority pattern (10 patch per each color)
• Photo priority pattern (10 patch per each color)
• Standard pattern for ARCDAT control (3 patch per each color)
F-2-99