Image forming apparatus controlling charge of toner and...

Details Image forming apparatus controlling charge of toner and... Image forming apparatus controlling charge of toner and...

2007-05-22

2007-05-22

Ngo, Hoang (Department: 2852)

Electrophotography

Control of electrophotography process

Having temperature or humidity detection

C399S053000, C399S284000

Reexamination Certificate

active

11030961

ABSTRACT:
An image forming apparatus and method for controlling a charge of a toner are provided. The apparatus and method includes a toner supplying roller; a developing roller for supplying the toner to an organic photoconductor; a charge controller for adjusting the charge of the toner on the developing roller; a developing current detector for detecting a change in current for a developing voltage; and a charge controlling voltage controller for adjusting a charge controlling voltage according to the detection result. The apparatus can uniformly maintain the quality of an image by recognizing a change in the charge of toner based on a change in the environment. Also, the image forming apparatus indicates a proper toner replacement time by determining when the charge of the toner is abnormally low as a toner shortage state and displaying the toner shortage state on a panel operating unit.

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patent: 5819131 (1998-10-01), Kim
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patent: 06-027807 (1994-04-01), None
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