Patent ID: 9658562
Date: 2017-05-23
CPC Classifications: G03G

Claim:
1. An image forming apparatus comprising: a photosensitive member; a scanning unit configured to form a latent image on the photosensitive member, by forming a light spot on the photosensitive member with light emitted by a light source and scanning the light spot, wherein a scanning speed at which the photosensitive member is scanned with the light spot changes within a scan line; a developing unit configured to develop the latent image formed on the photosensitive member and to form a developer image; a density detection unit configured to detect a density of the developer image formed on the photosensitive member; a control unit configured to perform correction control of a luminance and a light-emitting time of the light source, according to a pixel to be exposed; and a holding unit configured to hold profile information indicating a change of the light spot due to an environment or due to a position of the pixel, wherein the holding unit is further configured to hold scanning information indicating the light-emitting time of the light source or the luminance of the light source with respect to the pixel, for correcting a change in the scanning time of the pixel due to a change in the scanning speed, and wherein the control unit is further configured to detect a change in the density of the developer image due to a scanning position on the photosensitive member, to generate the profile information based on the change in the density of the developer image, and to perform the correction control based on the scanning information and the profile information.