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IMAGE FORMING APPARATUS

  • US 20170242386A1
  • Filed: 02/10/2017
  • Published: 08/24/2017
  • Est. Priority Date: 02/19/2016
  • Status: Active Grant
First Claim
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1. An image forming apparatus comprising:

  • an image bearing member on which an electrostatic image is formed; and

    a developer bearing member that bears a developer to develop the electrostatic image formed on the image bearing member,wherein the image forming apparatus is capable of performinga first image forming mode that performs image formation at a first peripheral speed ratio representing a ratio of a peripheral speed of the developer bearing member to a peripheral speed of the image bearing member anda second image forming mode that performs the image formation at a second peripheral speed ratio, which is different from the first peripheral speed ratio,wherein an amount of the developer consumed in the image formation is detected based on an estimate of an amount of the developer consumed by one pixel and the number of pixels at a part at which the developer is consumed, andwherein the estimate of the amount of the developer consumed by the one pixel in the first image forming mode is different from that in the second image forming mode.

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