| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that an image defect is more likely to be caused by injection of charges from a carrier into a photosensitive drum, for example, when high Duty images are consecutively formed. <P>SOLUTION: In the image forming apparatus that has a developing means using two-component developer and a toner concentration detecting means used for detecting the toner concentration of the developer, the value of a voltage between the peaks of an AC bias applied to a developing means is controlled according to the toner concentration detected by the toner concentration detecting means. <P>COPYRIGHT: (C)2009,JPO&INPIT |
