Patent ID: 9014601
Filing Date: 2015-04-21
Classification: G03G

Abstract:
1. A color image forming apparatus comprising: an image forming unit, including a plurality of photosensitive members and an exposure device to expose each of the plurality of photosensitive members to form electrostatic latent images, configured to form images corresponding to a plurality of colors by developing the electrostatic latent images formed on the plurality of photosensitive members by the exposure device; a transfer member onto which the plurality of images formed by the image forming unit are transferred; a first temperature detection unit configured to detect a first temperature of the exposure device; a second temperature detection unit disposed at a position different from the first temperature detection unit, configured to detect a second temperature of the image forming units; a third temperature detection unit configured to detect a third temperature corresponding to a temperature outside the image forming apparatus; a color registration pattern detection unit configured to detect a color registration pattern formed on the transfer member; a determination unit configured to determine a color registration adjustment value; and a color registration adjustment unit configured to perform a color registration adjustment based on the color registration adjustment value, wherein the determination unit includes: wherein the second determination unit determines the second color registration adjustment value based on a difference between the first temperature and the third temperature, and a difference between the second temperature and the third temperature.