Stanzione & Kim, LLP
Image forming device and method of adjusting density of formed image
An image forming device includes a toner supplying unit to supply the toner to a storage unit. A mixer supplies developer in the storage unit to a developing roller, and a developer sensor detects the amount of developer on the surface of the developing roller. A toner concentration sensor detects toner concentration in the developer stored in the storage unit, and a control unit adjusts at least one of a developing bias and a rotation speed of the mixer based on a value detected by the developer sensor and a value detected by the toner concentration sensor, such that a printed image has uniform density.
Samsung Electronics Co., Ltd
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Ki-hwan Tatsuhiro Soon-cheol
Kwon Otsuka Kweon