Image forming apparatus
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United States of America Patent
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Aug 30, 2016
Issued Date -
N/A
app pub date -
Jan 5, 2016
filing date -
Jan 8, 2015
priority date (Note) -
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status (Latency Note)
Importance
Abstract
An image forming apparatus includes an image-bearing member, which is charged by a charge voltage in which direct and alternating-current voltages are superposed on each other. A toner image is formed on the charged image-bearing member. A current flowing through the charging member is detected when the charge voltage is applied to the charging member. A current, in a frequency band including a discharge current component, is extracted from the detected current. The alternating-current voltage is adjusted based on the current extracted by an extraction unit. Environmental information is acquired. Based on the environmental information acquired by an acquisition unit, a frequency band for extraction performed by the extraction unit is set.
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