Patent ID: 6668142
Filing Date: 2003-12-23
Classification: G03G

Abstract:
An image forming apparatus comprising:a toner density detector for detecting a density of toner contained in a two-component developing agent adapted to be used in image formation; a toner density controller for controlling the toner density detected by the toner density detector to a target value: a mode selector for allowing a user to selectively designate a low frequent image-forming mode indicating that the image forming apparatus is in a less-used state where a frequency of the image formation is smaller than a predetermined value and a high frequent image-forming mode indicating that the image forming apparatus is in a highly-used state where the frequency of the image formation is not smaller than the predetermined value; and a toner density corrector for correcting the target value of the toner density in response to designation of the high frequent image-forming mode by the mode selector in such a manner that the toner density controller controllably adjusts the toner density to equal a higher target value which is a larger value than a lower target value corresponding to the state where the image forming apparatus is in the low frequent image-forming mode.