Patent ID: 6148161
Filing Date: 2000-11-14
Classification: G03G

Abstract:
An image forming apparatus, comprising:an image carrier;means for developing a latent image formed on the image carrier by applying two-component developer including toner onto the latent image, the developing means including a developing part containing the two-component developer and means for stirring the two-component developer;means for supplying toner to the developing part of the developing means;means for detecting a toner density of the two-component developer in the developing means;means for calculating a difference between an output value VT of the toner density detection means and a criterion value VTref for controlling the toner density of the two-component developer and controlling the toner supplying means based upon the difference;means for detecting an image density of a criterion image formed on the image carrier; andmeans for correcting the criterion value VTref based upon an output value of the criterion image density detection means,wherein the stirring means is operated based upon determining a difference between the criterion value VTref and the output value VT of the toner density detecting means and an output value of the criterion image density detecting means when an image forming operation is started.