Image forming apparatus having a control circuit that selectively controls power to be supplied to a plurality of heat generating blocks of a heater
US10416595B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2018 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | May 15, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/80
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image forming apparatus includes a control circuit having a plurality of semiconductor elements configured to perform switching between ON and OFF of a plurality of heat generating blocks, and a power interrupting unit configured to be activated so as to interrupt power being supplied to the plurality of semiconductor elements when a heater overheats. Of the plurality of semiconductor elements, a first semiconductor element to supply power to a first heat generating block, is connected, in series, to a second semiconductor element to supply power to a second heat generating block. In addition, when the power interrupting unit is not activated, the second heat generating block is controlled by controlling only the second semiconductor element, and, when the power interrupting unit is not activated, the first heat generating block is controlled by controlling the first semiconductor element and the second semiconductor element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.