IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To provide an image forming apparatus which has an image density detecting means and a toner density detecting means, wherein the control range of toner density and stability of an image can be made compatible even during various uses. SOLUTION: The image forming apparatus performs control for changing the aimed value (Vref) of toner density control on the basis of the output of the image density detecting means, and adjusts the output voltage level of the toner density detecting means with an input voltage so that when toner density controlled according to the aimed value (Vref) of the toner density control is the upper limit or lower limit of a range set as the toner density control range, density control based upon a toner density control range as a practical range exceeding the upper limit or lower limit can be performed. COPYRIGHT: (C)2007,JPO&INPIT