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:
Sep. 28, 2004
Filed:
Feb. 21, 2001
Ying-Hao Hsu, Kaohsiung, TW;
Benq Corporation, Kweishan, TW;
Abstract
The invention provides an automatic charging device via a USB and method of operating the same. The charging device comprises: a battery charger; an indicator; an USB interface; and a charging controller. The method of operating the charging device comprises the steps of: establishing a connection between the USB interface and the host system; providing a charging controller in the host system, wherein the charging controller obtains appropriate current from the bus-power through the connection; providing a battery charger electrically connecting the USB interface to electrify a battery; transferring data through the USB interface and electrifying a battery by the battery charger; continually adjusting the current of the bus-power to meet a maximum load current of the USB by the charging controller; showing the current of the bus-power and the rate of progress of the battery charger by an indicator in the host system; and determining whether the battery is fully charged or not, either terminating the charge as the battery is fully charged and decreasing the current to meet a minimum load current of the USB or repeating the steps of adjusting the current of the bus-power.