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:
Feb. 15, 2005
Filed:
Sep. 30, 2003
John G. Konopka, Deer Park, IL (US);
John G. Konopka, Deer Park, IL (US);
Osrom Sylvania, Inc., Danvers, MA (US);
Abstract
A ballast (') includes a rectifier circuit (), a boost converter (′), an inverter (), an output circuit (), and an inverter startup circuit (). Inverter startup circuit () is coupled between boost converter () and inverter (). During operation, inverter startup circuit () provides a delay period between startup of boost converter () and startup of inverter () so that startup of inverter () is delayed until at least such time as the DC rail voltage provided by boost converter () approaches its steady-state operating level. This ensures that the ballast (′) provides an output voltage that is sufficiently high to ignite a lamp () in a preferred manner, with little or no glow current and a fast strike time.