Image forming apparatus and image forming method

摘要

An image forming apparatus (100) includes an image carrier (2Y, 2M, 2C, 2K); a developer carrier (5Ya, 5Ca, 5Ma, 5Ka) configured to adhere toner onto the image carrier; an image density detector (30) to detect a density of an image on the image carrier formed by the developer carrier (5Ya, 5Ca, 5Ma, 5Ka) adhering the toner on the image carrier; a rotary member to form an image pattern of which density is detected by the image density detector (30); and a rotational position detector (18Y, 18C, 18M, 18K) to detect a rotational position of the rotary member. In the image forming apparatus (100), the image pattern is generated based on the rotational position detected by the rotational position detector (18Y, 18C, 18M, 18K) and the rotary member that the rotational position detector (18Y, 18C, 18M, 18K) detects the rotational position thereof is either the image carrier or the developer carrier.