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:
Oct. 07, 1997
Filed:
May. 24, 1995
Hideki Nakanishi, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Current of electricity provided from a secondary battery 1 to a load 2, such as a personal computer and a printer, is determined by a current determination circuit 8. The detected result is compared with a predetermined threshold by a comparing circuit 7, the comparison result is used to deciding a voltage threshold for judging whether or not the secondary battery is in a low battery power state. After the voltage threshold is decided, a terminal voltage of the secondary battery is measured by a voltage determination circuit 6, then the measured result is compared with the voltage threshold. Thereby whether or not the secondary battery 1 is in a low battery power state is judged.