Electrophotography – Control of electrophotography process – Of plural processes
Reexamination Certificate
2006-10-03
2006-10-03
Ngo, Hoang (Department: 2852)
Electrophotography
Control of electrophotography process
Of plural processes
C399S044000, C399S088000
Reexamination Certificate
active
07116921
ABSTRACT:
A method and apparatus to correct power source voltage variation in an image forming system. The apparatus to correct power source voltage variation includes: an image density sensing unit which senses an image density; a first variation correction unit which calculates a variation between a first power source voltage of the image density sensing unit and a first reference value, and performs correction by applying a correction amount, based on the calculated variation, to an image density sensed in the image density sensing unit; an environment detection value measuring unit which measures a roll resistance value for environment recognition; and a second variation correction unit which calculates a variation between a second power source voltage of the environment detection value measuring unit and a second reference value, and performs correction by applying a correction amount, based on the calculated variation, to a roll resistance value measured in the environment detection value measuring unit. Accordingly, when a predetermined analog value is measured to control an image density or a high voltage output, the power source voltage variation due to change in a power line or system variation is corrected such that an image density can be controlled more precisely.
REFERENCES:
patent: 5107301 (1992-04-01), Yamauchi
patent: 5781000 (1998-07-01), Saeki et al.
patent: 5822651 (1998-10-01), Yim et al.
patent: 6115561 (2000-09-01), Fukushima
patent: 6262567 (2001-07-01), Bartlett
patent: 03-215882 (1991-09-01), None
patent: 2000-131900 (2000-05-01), None
patent: 2002-169351 (2002-06-01), None
patent: 2002-287441 (2002-10-01), None
patent: 1998-3929 (1998-03-01), None
patent: 2003-13666 (2003-02-01), None
Korean Official Action issued on Jul. 28, 2005, for Korean Patent Application No. 10-2003-53908 (listing 3 references).
Ngo Hoang
Stanzione & Kim LLP
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