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:
Dec. 29, 2009
Filed:
Nov. 28, 2005
Shinji Nakamiya, Matsumoto, JP;
Hidenori Nakamura, Shimosuwa-machi, JP;
Shinji Nakamiya, Matsumoto, JP;
Hidenori Nakamura, Shimosuwa-machi, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A power supply apparatusand a storage devicethat stores power supplied by the power supply apparatusinterpose a power supply control circuit. The circuit has a charging current detectorto detect charging current IC flowing from the power supply apparatusto the storage device; a blocking unitto interrupt the backflow current IR that flows from the storage device to the power supply apparatus on the basis of an inputted blocking control signal SH; and a backflow monitoring unitto monitor by sampling for the presence of the charging current IC until the charging current IC is detected, constantly to monitor for the presence of the charging current IC after the charging current IC has been detected, and to output a blocking control signal SH for cutting off the backflow current IR when the charging current IC is not flowing.