Image forming apparatus capable of reducing image density irregularity

摘要

In an image forming apparatus, a first controller forms a first image pattern on an image bearer and determines a first image formation condition based on a detection result of density of a toner image. The first controller then controls a toner image forming device based on the first image formation condition. A second controller forms a second image pattern different from the first image pattern on an image bearer and determines a second image formation condition based on a detection result of density of a toner image. The second controller then controls a toner image forming device based on the second image formation condition.

主权项

1. An image forming apparatus, comprising:
an image bearer to bear an image; a toner image forming device to form a toner image on the image bearer; a density detector to detect density of a toner image formed on the image bearer; and a processor that forms a first image pattern having a single density on the image bearer, determines a first fluctuation control table of a first image formation condition reducing density irregularity of the toner image based on a detection result of a periodical fluctuation of density of the first image pattern, and controls the toner image forming device based on the first fluctuation control table of the first image formation condition, and forms a second image pattern having a single density different from the density of the first image pattern on the image bearer, determines a second fluctuation control table of a second image formation condition reducing density irregularity of the toner image based on a detection result of a periodical fluctuation of density of the second image pattern, and controls the toner image forming device based on only the second fluctuation control table of the second image formation condition.