Patent ID: 9182720
Filing Date: 2015-11-10
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: an image bearer; an exposing device that forms an electrostatic latent image of a pattern on the image bearer; a rotational position detecting device that detects a rotational position of the image bearer related to the pattern; an electrical potential detecting device that detects a surface potential of the pattern on the image bearer; a toner image forming device to change the pattern to a toner pattern on the image bearer; a density detector that detects density of the toner pattern; a memory that stores the density of a toner pattern and the surface potential of the pattern in relation to the rotational position of the image bearer; and a processor that generates the toner pattern in a first predetermined timing, generates a first density variation data based on the surface potential of the pattern in relation to the rotational position of the image bearer in the first predetermined timing, generates a second density variation data based on the first density variation data and the density of the toner pattern in the first predetermined timing, stores the first density variation data and the second density variation data in the memory in the first predetermined timing, makes an electrostatic latent image pattern in a second predetermined timing that is more frequent than the first predetermined timing, decides whether a change in density variation has occurred, changes the first density variation data in response to the change in density variation in the second predetermined timing, and controls a toner image forming condition of the toner image forming device based on the first density variation data and the second density variation data in the second predetermined timing.