Image forming apparatus capable of suppressing occurrence of image defects in response to difference in carrier resistance and obtaining high image quality
US11048192B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2020 |
| Grant date | Jun 29, 2021 |
| Priority date | — |
| Expiry date | Dec 6, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0808
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is an image forming apparatus capable of suppressing the occurrence of image defects in response to a difference in carrier resistance and obtaining high image quality. A developing unit has a developing roller that carries toner in a two-component developer that includes a toner and a magnetic carrier on the surface thereof, and forms a toner image on the surface of a photosensitive drum. A current detecting unit detects developing current flowing between the developing roller and the photosensitive drum when a developing voltage is applied to the developing roller by a developing power supply. When the developing voltage is applied to the photosensitive drum, a control unit derives a carrier resistance based on the developing current detected by a current detecting unit, and controls an AC amplitude of an AC voltage of the developing voltage based on the carrier resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.