The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2013
Filed:
Aug. 10, 2010
Akira Yashiro, Ikeda, JP;
Akira Yashiro, Ikeda, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A power source unit includes an AC/DC converter to convert alternating current to direct current output, an auxiliary power source storing electric power, a load detector to detect a high/low level of direct current output to a DC-using load device from the AC/DC converter, and a power supply controller. When load to be required exceeds alternating current power source limits, the power supply controller shuts down output of direct current from the AC/DC converter, and instead uses the auxiliary power source to supply power to the DC-using load device. When the load to be required is within alternating current power source limits, the power supply controller uses the AC/DC converter to supply power to the DC-using load device while the load detector detects high voltage for the DC-using load device, and the power supply controller uses the auxiliary power source to supply power to the DC-using load device and shuts down the AC/DC converter while the load detector detects low voltage for the DC-using load device.