Patent ID: 8055147
Filing Date: 2011-11-08
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: an image carrier; a toner image forming device structured to form a toner image on the image carrier; a density sensor structured to detect an image density of the toner image and to output density value corresponding to the image density; a controller structured to calibrate the density sensor based on a standard value; wherein the image forming apparatus is structured to form a plurality of reference patterns, each of the plurality of reference patterns having a different resolution; the image forming apparatus is structured to form each of the plurality of reference patterns at a plurality image forming conditions; the density sensor is structured to detect densities of the plurality of the reference patterns at each of the plurality of image forming conditions, and output density values for each of the plurality of reference patterns at each of the plurality of image forming conditions; and the controller is structured to assign as the standard value the density value that is the same for each of the plurality of reference patterns for a given image forming condition.