Patent ID: 9110394
Filing Date: 2015-08-18
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a plurality of photoconductors corresponding to a plurality of colors; an exposure unit configured to form an electrostatic latent image by emitting light to the plurality of photoconductors; a developing unit configured to form a toner image by feeding toner to the plurality of photoconductors; an intermediate transfer body to which the toner image, formed on each of the plurality of photoconductors, is transferred; a sensing unit configured to sense the toner image formed on the intermediate transfer body; and a controller which forms images in a plurality of image forming sections of the intermediate transfer body and forms test-pattern sets for color registration in respective blanks between the neighboring image forming sections, and which implements color registration calibration using color registration calibration values acquired from four or less test pattern sets among the formed test pattern sets, wherein the controller implements color registration calibration using an average calibration value of the color registration calibration values acquired from the four test pattern sets, and wherein the controller acquires an average calibration value from an m