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. 04, 2006
Filed:
May. 01, 2003
Tamiji Nagai, Kanagawa, JP;
Kazuo Yamazaki, Kanagawa, JP;
Tadahisa Yamamoto, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
In the case of charging by a charging apparatus having a plurality of input terminals to which external power sources for charging a secondary battery are inputted, it is prevented that a current of the inputted power source is outputted to the outside from the other input terminals for charging which are not used. If there are inputs from a plurality of input terminals, the input power sources are controlled so that the battery is optimally charged. pnp-type transistors Qand Qare arranged between two input terminals of a terminalfor an external power adaptor and a terminalfor a holder and a secondary battery E, respectively. When a control ICdetects an input power voltage of one of the transistors, the transistor on the detected side is turned on. If the control ICdetects both input power voltages, a priority is allocated under predetermined conditions and the secondary battery Eis charged by the power source of the higher priority.