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Image forming apparatus operable in modes having different color gamuts

  • US 10,642,209 B2
  • Filed: 07/09/2018
  • Issued: 05/05/2020
  • Est. Priority Date: 07/13/2017
  • Status: Active Grant
First Claim
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1. An image forming apparatus, comprising:

  • a photosensitive drum;

    an exposure unit configured to expose the photosensitive drum to form an electrostatic latent image on the photosensitive drum;

    a developing roller configured to develop the electrostatic latent image on the photosensitive drum which has been formed by the exposure unit with toner to form a toner image on the photosensitive drum;

    a belt, the toner image formed on the photosensitive drum being transferred onto the belt or a recording material carried by the belt;

    a detection unit configured to detect reflected light representing a density of an image for detection formed on the belt; and

    a controller configured to perform adjustment of a correlation between input image data and image data to be used for the input image data based on a result of detecting the reflected light representing the density of the image for detection by the detection unit,wherein the image forming apparatus is operable so as to perform image formation in a second mode using a color gamut different from a color gamut in a first mode, a circumferential speed difference between a circumferential speed of the developing roller and a circumferential speed of the photosensitive drum in the second mode being set to be greater than the circumferential speed difference in the first mode, andwherein the controller is configured to perform the adjustment of the correlation between the input image data and the image data to be used for the input image data in the second mode (i) based on the result of detecting the reflected light representing the density of the image for detection by the detection unit in the first mode and (ii) a correlation of density between the first mode and the second mode.

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