Patent ID: 9188924
Filing Date: 2015-11-17
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image carrier; a developer carrier configured to adhere toner onto the image carrier; an image density detector to detect a density of an image on the image carrier formed by the developer carrier adhering the toner onto the image carrier; a rotary member to form an image pattern of which the density is detected by the image density detector; a rotational position detector to detect a rotational position of the rotary member; and circuitry configured to generate the image pattern based on the rotational position detected by the rotational position detector so that the image pattern is in synchronization with a rotational position detection signal of the rotational position detector, and to generate the image pattern so that a leading end of the image pattern in a sub-scanning direction coincides with a rising of the rotational position detection signal of the rotational position detector, and to calculate a cyclic density fluctuation of the image pattern by determining a relation between the density of the image pattern detected by the image density detector with a rotational phase of the rotary member that is determined based on the rotational position detected by the rotational position detector.