Image forming apparatus with a power supply applying charged voltage to a charging section
US9727003B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2016 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Mar 24, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0266
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A power supply applies a first charged voltage to a charging section disposed near an image carrier during a predetermined process and applies second charged voltages sequentially to the charging section in obtaining a predetermined peak-to-peak voltage value for an alternating-current voltage of the first charged voltage. Each of the second charged voltages includes an alternating-current voltage having a peak-to-peak voltage value varying between a forward discharge range and a back discharge range. A current sensing section senses the alternating-current running through the charging section upon application of each of the second charged voltages. A control section derives a first approximation function and a second approximation function on the basis of the alternating-current values sensed by the current sensing section and sets a peak-to-peak voltage value as the predetermined peak-to-peak voltage through a difference function representing a difference value between the first approximation function and the second approximation function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.