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. 23, 2003
Filed:
Jan. 16, 2002
Applicant:
Inventors:
Arnold Willem Buij, Eindhoven, NL;
Marcel Beij, Eindhoven, NL;
Assignee:
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 4/100 ;
U.S. Cl.
CPC ...
H05B 4/100 ;
Abstract
A ballast for feeding a fluorescent lamp, comprising a power supply unit controlled by an input variable, dimming means for adjusting the desired power through the lamp, and a control circuit for adapting the input variable from a starting value to a final value, the actual value through the lamp being at least substantially equal to the adjusted power value, said control circuit additionally comprising processor means capable of determining the starting value in dependence upon the adjusted power value.