Patent ID: 8351073
Filing Date: 2013-01-08
Classification: H04N

Abstract:
1. An image forming apparatus comprising: a plurality of photosensitive members corresponding to respective colors for forming a color image; a plurality of optical elements that irradiate laser beams to the plurality of photosensitive members; a plurality of operating modes including a print mode for executing a printing operation and a standby mode in which the apparatus is now on standby, wherein a deviation amount of a laser beam irradiating position of the optical element changes gradually due to an influence of a heat in the apparatus and a color deviation is corrected based on the deviation amount obtained by a deviation amount calculation; and a deviation amount calculator configured to obtain, by an arithmetic operation, the deviation amount between the laser beam irradiating positions for each color, under the condition that the deviation amount increases gradually according to a time lapse in at least one of the plurality of operating modes, according with a further time lapse, the deviation amount between the laser beam irradiating positions for each color decreases gradually, and according with a further time lapse, the deviation amount between the laser beam irradiating positions for each color is converged.