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Title:
IMAGE FORMING APPARATUS, IMAGE FORMATION SYSTEM, CARTRIDGE, AND MEMORY MEDIUM
Document Type and Number:
Japanese Patent JP2007121840
Kind Code:
A
Abstract:

To provide an image forming apparatus, an image formation system, a cartridge, and a memory medium, in which the space saving and cost reduction of a charging voltage circuit and highly accurate control of charging AC voltage can be attained.

The image forming apparatus comprises: a means for selecting a part of charging voltage outputted from a charging voltage output part during no formation of an image, outputting the selected charging voltage as detecting voltage and comparing a detected current value with a previously set target current value to determine a charging voltage for the formation of an image; and a control part for changing the detecting voltage to be selected in accordance with the consumption of an image carrier and determining the charging voltage corresponding to a minimum current value larger than the target current value out of current values detected by outputting the detecting voltage as the charging voltage for the formation of an image.


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Inventors:
YAMAUCHI KAZUMI
KATO MASAHITO
Application Number:
JP2005000316272
Publication Date:
May 17, 2007
Filing Date:
October 31, 2005
Export Citation:
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Assignee:
CANON KK
International Classes:
G03G15/02; G03G21/18
Attorney, Agent or Firm:
丹羽 宏之
野口 忠夫