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Image forming apparatus and image forming method

  • US 10,539,907 B2
  • Filed: 11/19/2018
  • Issued: 01/21/2020
  • Est. Priority Date: 11/20/2017
  • Status: Expired due to Fees
First Claim
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1. An image forming apparatus, comprising:

  • a photosensitive drum;

    a developing roller configured to develop an electrostatic latent image on the photosensitive drum with a toner to form a toner image;

    a belt onto which the toner image formed on the photosensitive drum is to be transferred or on which a recording material, onto which the toner image is to be transferred, is borne;

    a detector configured to detect a density of a detection image formed on the belt, wherein the image forming apparatus is configured to perform an image formation in a first mode in which a circumferential speed difference of a circumferential speed of the developing roller with respect to a circumferential speed of the photosensitive drum is a first circumferential speed difference and in a second mode in which the circumferential speed difference is greater than the first circumferential speed difference;

    a controller configured to calculate a first conversion unit configured to convert a gradation of input image data so that a density output for the input image data becomes a first density output characteristic based on a first detection result of the detection image detected by the detector in the first mode; and

    a storage,wherein the controller is configured to generate a second conversion unit configured to convert the gradation of the input image data so that the density output for the input image data becomes a second density output characteristic in the second mode based on the detection result in the first mode and correction information, andwherein the controller is configured to further update the correction information based on a second detection result of the detection image detected by the detector in the second mode and the first detection result.

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