Electric power source for equipment having power saving mode, power saving control device and image forming apparatus having the power source
Patent 6177739 Issued on January 23, 2001. Estimated Expiration Date: 
October 23, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 23, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesCopying machine Power converter with controller for switching between primary and battery power sources Energy saving image-forming apparatus and control method therefor Automatic termination of screen saver mode on a display of reproduction apparatus Patent #: 5642185 InventorsAssigneeApplicationNo. 178301 filed on 10/23/1998US Classes:307/125, Electrical307/80, Selective or optional sources307/81, Predetermined sequence399/81, Operator interface (e.g., display control panel)399/88Having power supplyExaminersPrimary: Fleming, FritzAttorney, Agent or FirmInternational ClassH01H 047/00Foreign Application Priority Data1997-10-28 JPAbstractIn an electric power supply for supplying electric power, after a power factor has been improved, to an equipment having a power saving mode which is transferred to the power saving mode when the equipment is not operated for a predetermined period of time, the electric power supply includes: a power factor improvement section for improving the power factor by a switching operation; and a switch provided between a power source and the power factor improvement section for switching the electric power to either the power factor improvement section or the equipment. When the equipment is transferred to the power saving mode, the electric power is supplied by the switch to the equipment without passing through the power factor improvement section.Field of SearchElectricalSelective or optional sources Predetermined sequence Connecting or disconnecting Condition responsive Attainment of voltage, frequency or phase relationship Selectively connected loads and/or sources Substitute or emergency source Plural substitute sources Storage battery or accumulator Substitute or alternate source Diverse sources By shutdown of only part of system Power conservation Programmable calculator with power saving feature By clock speed control (e.g., clock on/off) Active/idle mode processing Operator interface (e.g., display control panel) Having power supply Supplying power to charger In parallel Including semiconductor device | |
