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:
Mar. 31, 1998
Filed:
Dec. 20, 1996
Lee Daniel Griffin, Raleigh, NC (US);
Ivan Nelson Wakefield, Cary, NC (US);
Ericsson, Inc., Research Triangle Pk., NC (US);
Abstract
An apparatus and method for disabling the internal battery charging algorithm of an electric device when connected to a smart battery charger having its own internal controller and charging algorithm. The controller of the external battery charger varies the output of the charger to provide the battery with a current source that predictably varies in voltage or represents a digital signal at a preset data rate. The internal controller of the electronic device recognizes the varying nature of the supplied direct current and disables its own internal battery charging algorithm. The charging algorithm of the external battery charger thus independently controls the charging of the electronic device internal battery.