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:
May. 20, 1997
Filed:
Apr. 03, 1995
Kenichi Kabasawa, Saitama, JP;
Lau S Keang, Penang, MY;
Looi T Chung, Penang, MY;
Shigeho Ogawa, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An electronic appliance such as a digital audio disk player in which either an external power source, or a secondary cell is employed as a power source, includes a signal reproducing unit, a recharging unit, a judging unit, a measuring unit, and a controller. To the signal reproducing unit, an operation power source voltage is applied from the external power source, or the secondary cell. The voltage from the external power source is applied to the recharging unit so as to recharge the secondary cell. The judging unit judges whether or not the voltage from the secondary cell is applied to the signal reproducing unit. The measuring unit measures a time period during which the voltage from the secondary cell is applied to the signal reproducing unit when the judgement result obtained from the judging unit indicates that the voltage from the secondary cell is applied. The controller sets a recharging time period based on the measurement value obtained from the measuring unit when the signal reproducing unit is under non-operation condition, and controls the recharging unit only for the set recharging time period, so that the recharging operation of the secondary cell is performed by the recharging unit.