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:
Jun. 27, 2000
Filed:
May. 13, 1999
Applicant:
Inventor:
Troy J Littlefield, Colorado Springs, CO (US);
Assignee:
Toko, Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
3152 / ; 315224 ; 315307 ; 315D / ;
Abstract
A switching circuit is provided for converting a DC voltage to an AC voltage required for driving an electroluminescent lamp. The switching circuit charges and discharges the electroluminescent lamp with a substantially constant current to thereby reduce peak currents and extend lamp life. A constant current discharge feature of the switching circuit results in a significant reduction in current consumption.