Patent ID: 8892007

Claim:
An image forming apparatus comprising: an image carrying body on which an electrostatic latent image is formed; a developing unit that stores toner to develop the electrostatic latent image formed on the image carrying body by using the toner stored therein; a detecting unit that detects whether an amount of the toner stored in the developing unit is equal to or less than a threshold value; and a control unit that drives a driving unit for a first toner supply sequence and a second toner supply sequence, wherein the control unit drives the driving unit, for the first toner supply sequence, to supply the toner to the developing unit from a toner supplying unit when the detecting unit detects that the amount of the toner stored in the developing unit is equal to or less than the threshold value, and wherein the control unit drives the driving unit, for the second toner supply sequence for a correction driving time, when a predetermined condition is satisfied; and a calculating unit that calculates an amount of toner consumption from when the toner is supplied to the developing unit by the second toner supply sequence to a subsequent detection that the amount of the toner stored in the developing unit is equal to or less than the threshold value, wherein the control unit calculates a unit amount of toner supply which corresponds to an amount supplied in a case of driving the driving unit for a unit driving time, from the correction driving time and the amount of toner consumption, and wherein the control unit drives the driving unit for the first toner supply sequence on the basis of the calculated unit amount of toner supply.