Image forming apparatus supplying toner from container to accumulating unit based on tower density developer in the accumulating unit, and method of controlling image forming apparatus

摘要

An image forming apparatus including a replaceable container having toner stored therein includes: an image forming unit including an accumulating unit for accumulating developer containing toner and configured to form an image by using the developer in the accumulating unit; a measurement unit configured to measure a toner density in the accumulating unit; a portion to which the container is attached; a supplementing unit configured to supplement the toner from the attached container to the accumulating unit; and a controller configured to control the supplementing unit based on first information corresponding to a difference between the toner density and a target toner density and second information corresponding to an accumulated value obtained by accumulating differences, wherein the second information does not change in a period from replacement of the container by another container until a predetermined number of times of supplement is performed.

主权项

1. An image forming apparatus comprising:
an image forming unit including an accumulating unit for accumulating developer containing toner and configured to form an image by using the toner in the accumulating unit based on an image data; a first sensor configured to measure a toner density of the developer in the accumulating unit; a portion to which a container is mountable, the container containing toner; a second sensor configured to detect absence or presence of the container at the portion; a driving unit configured to rotate the container mounted on the portion to supply the toner from the rotating container to the accumulating unit; a difference computing section configured to determine first information corresponding to a difference between the toner density and a target toner density of the developer in the accumulating unit; an accumulated value computing section configured to accumulate the difference determined by the difference computing section and determine second information corresponding to an accumulated value of difference; and a controller configured to control the driving unit based on the first information and the second information, and determine whether the container is exchanged with another container based on a detection result by the second sensor, wherein the second information does not change in a period from a timing that the controller determines that the container is exchanged with the other container until the controller performs a predetermined times of supplement from the other container to the accumulating unit.