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Image forming apparatus

  • US 20020006289A1
  • Filed: 04/27/2001
  • Published: 01/17/2002
  • Est. Priority Date: 04/28/2000
  • Status: Active Grant
First Claim
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1. An image forming apparatus comprising:

  • an image bearing member;

    a charge member for electrically charging said image bearing member while contacting to said image bearing member;

    voltage applying means for applying an oscillating voltage including a component of AC voltage to said charge member;

    first detecting means for detecting an average of the AC current applied to said charge member from said voltage applying means;

    second detecting means for detection a value of the AC current corresponding to a peak of the AC voltage; and

    control means for effecting control such that when a detected current value of said detecting means is smaller than a first predetermined value, the detected current value of said first detecting means is at the first predetermined value, and when the detected current value of said first detecting means is larger than the first predetermined value, a current value of said second detecting means is at a second predetermined value.

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