Patent ID: 9052665
Filing Date: 2015-06-09
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a photosensitive body; a charging device configured to charge a surface of the photosensitive body based on a process condition; an exposure device configured to radiate light to the photosensitive body, to form an electrostatic latent image; a developing device configured to develop the electrostatic latent image with toner based on the process condition, to form a toner image; a density sensor configured to detect a density of the toner image; and a controller configured to cause a density detection patch to be formed as the toner image and set the process condition based on a density detection value of the density detection patch detected by the density sensor, wherein the density detection patch has a high-density portion and a low-density portion, the high-density portion and the low-density portion are arranged close to each other such that a boundary between the high-density portion and the low-density portion intersects with a conveyance direction of the density detection patch, and the controller compares, in the conveyance direction, temporal change in the density detection value at a boundary portion shifting from the high-density portion to the low-density portion, with temporal change in the density detection value at a boundary portion shifting from the low-density portion to the high-density portion, and sets the process condition based on a result of the comparison.