Patent ID: 8120824
Filing Date: 2012-02-21
Classification: H04N

Abstract:
1. An image forming apparatus comprising: an image forming section which forms an image on a photosensitive drum based on a reference signal, the reference signal being an image write control signal of a predetermined cycle; a measuring section which detects a rotational velocity of the photosensitive drum and measures a velocity fluctuation distribution of time period of one rotation of the drum; a storage section which stores a correction value in time period of one rotation of the drum as a correction data table for each type of recording sheets, wherein the correction value is obtained for each type of recording sheets based on the velocity fluctuation distribution in time period of one rotation of the drum measured by the measuring section; and a control section which corrects the cycle of the reference signal by referring the correction data table corresponding to a selected type of recording sheets, and controls the image forming section to form the image on the photosensitive drum based on the reference signal with the corrected cycle.