Voltage detection device and image heating device
US8606136B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2011 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Jan 25, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/5004
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The voltage detection device includes a first voltage detection part for detecting whether or not a time period ratio during which a voltage of an AC power supply is equal to or larger than a first threshold value is equal to or larger than a first ratio and a second voltage detection part for detecting whether or not a time period ratio during which the voltage of the AC power supply is lower than the first threshold value and equal to or larger than a second threshold value is equal to or larger than a second ratio higher than the first ratio, and determines whether the voltage of the AC power supply is a first commercial voltage or a second commercial voltage lower than the first commercial voltage based on results obtained by the first voltage detection part and by the second voltage detection part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.