Image forming apparatus
US8532512B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 2010 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Aug 1, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/021
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes: a charging unit which charges a surface of an image bearing member by contacting the image bearing member with a charging member to which a charging bias is applied, the charging bias being a voltage obtained by superimposing an AC voltage on a DC voltage; an electrostatic latent image forming unit which forms an electrostatic latent image on the surface of the image bearing member which is charged by the charging unit; a developing unit which develops the electrostatic latent image by using a developing bias formed by the voltage obtained by superimposing the AC voltage on the DC voltage; and a control unit which performs changing control of an AC frequency of the charging bias while maintaining a frequency ratio of an AC frequency of the developing bias to be an integral multiple of the AC frequency of the charging bias.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.