Patent ID: 7672603
Filing Date: 2010-03-02
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image forming unit adapted to perform image formation by forming a latent image on an image carrier based on image information, then developing and transferring the latent image; another image forming unit adapted to form an image for adjustment on a portion other than a portion on which the latent image is formed on the image carrier by said image forming unit; a detecting unit adapted to detect the density of the image for adjustment; an adjustment unit adapted to adjust image density based on the density of the image for adjustment detected by said detecting unit; an image formation control executing unit adapted to execute image formation control whereby density is adjusted by said adjustment unit when an image is formed by said image forming unit; and a control unit adapted to calculate a printing rate that indicates the percentage of the image formation to a sheet used for image formation, and, when the printing rate is determined to be within a set range, execute the image formation control at a set frequency, on the other hand, when the printing rate is determined to be outside the set range, change the set frequency and execute the image formation control, wherein said control unit executes the image formation control before and after the image formation of the image information when the printing rate is determined to be outside the set range.