| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a two-component developing apparatus configured to prevent periodic change in density, as well as peripheral white defect or reduction in granularity, an image forming apparatus including the developing apparatus, and a process cartridge.SOLUTION: A developing sleeve power source applies an AC developing bias including an AC component having a frequency (1/T) of 2.0[kHz] or less, to a developing sleeve. A duty ratio (T1/T×100) of a positive-polarity component in the AC component of the AC developing bias is 4-20[%].</p> |
