Power control for a fuser of an imaging device
US10955776B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2020 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Jan 9, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/80
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging device includes a fuser having a heater connected to a power source via a switch. A controller generates a heater control signal for driving the heater without synchronizing the generation of the heater control signal with zero crossings of an AC voltage of the power source. The heater control signal changes between a first state indicating for the heater to be turned on and a second state indicating for the heater to be turned off. A trigger circuit receives the heater control signal and detects whether the AC voltage is within a predefined voltage span around zero volts. The trigger circuit generates a trigger signal for the switch when the AC voltage is within the predefined voltage span while the heater control signal is in the first state such that the switch causes current to pass through from the power source to the heater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.