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. 02, 2004
Filed:
Sep. 28, 2001
Applicant:
Inventor:
Himamshu V. Prasad, Rolling Meadows, IL (US);
Assignee:
Osram Sylavania, Inc., Danvers, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 3/702 ;
U.S. Cl.
CPC ...
H05B 3/702 ;
Abstract
A ballast ( ) and method for regulating power in a high pressure discharge lamp ( ) is disclosed. In a preferred embodiment, ballast ( ) comprises a microcontroller ( ), a buck converter ( ), and an inverter ( ). Microcontroller ( ) monitors a signal representative of the lamp voltage and sets a current in the lamp based upon the monitored signal via control of a buck current provided by the buck converter ( ). A method for regulating power in a high pressure discharge lamp is also described. The method comprises steps of detecting ( ) a voltage at the lamp and setting ( ) a current in the lamp based upon the detected voltage.