Image forming apparatus with current control
First Claim
1. An image forming apparatus comprising:
- an image bearing member;
a charge member contacted to said image bearing member to electrically charge said image bearing member;
voltage applying means for applying to said charge member an oscillating voltage including an AC voltage component;
first detecting means for detecting an AC current applied to said charge member from said voltage applying means;
second detecting means for detecting the AC current corresponding to a peak or a neighborhood of the peak of the AC voltage;
control means for effecting control such that current detected by said second detecting means is a predetermined level when the current detected by said first detecting means is within a predetermined range and such that current detected by said first detecting means is a predetermined level when the current detected by said first detecting means is outside said predetermined range.
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Accused Products
Abstract
An image forming apparatus includes an image bearing member and a charge member contacted to the image bearing member for electrically charging the image bearing member. An oscillating voltage including an AC voltage component is applied to the charge member. A first detector detects an AC current applied to the charge member and a second detector detects the AC current corresponding to a peak or a neighborhood of the peak of the AC voltage. A controller effects control such that current detected by the second detector is a predetermined level when the current detected by the first detector is within a predetermined range, and such that current detected by the first detector is a predetermined level when the current detected by the first detector is outside the predetermined range.
31 Citations
12 Claims
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1. An image forming apparatus comprising:
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an image bearing member;
a charge member contacted to said image bearing member to electrically charge said image bearing member;
voltage applying means for applying to said charge member an oscillating voltage including an AC voltage component;
first detecting means for detecting an AC current applied to said charge member from said voltage applying means;
second detecting means for detecting the AC current corresponding to a peak or a neighborhood of the peak of the AC voltage;
control means for effecting control such that current detected by said second detecting means is a predetermined level when the current detected by said first detecting means is within a predetermined range and such that current detected by said first detecting means is a predetermined level when the current detected by said first detecting means is outside said predetermined range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification