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:
Dec. 05, 2000
Filed:
Dec. 31, 1998
Applicant:
Inventor:
Hang.kan Andersson, Malmo, SE;
Assignee:
Telefonaktiebolaget LM Ericsson, Stockholm, SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
3151693 ; 315160 ;
Abstract
An inverter circuit for a battery operated devices includes an EL device that is driven by the inverter circuit. The inverter circuit preserves battery power by recycling battery current stored in the EL device. A charging circuit charges the EL device to a first voltage level during a charge cycle. A discharge circuit subsequently discharges the battery current stored in the EL device back into the battery.