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:
Apr. 01, 2003
Filed:
Jun. 13, 2001
Applicant:
Inventor:
Lawrence Samuel Tyson, Surrey, GB;
Assignee:
Microlights Limited, Marlborough, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 4/116 ; H05B 3/702 ;
U.S. Cl.
CPC ...
H05B 4/116 ; H05B 3/702 ;
Abstract
A lighting system ( ) having a high intensity discharge lamp ( ) and an electronic ballast having a variable frequency generator ( ) which is arranged to vary the frequency of the ballast output over a range of frequencies having a minimum frequency of 400 kHz; a reactance is included in a joint operating circuit ( ) in and between the ballast generator ( ) and lamp ( ) such that the circuit resonate to provide a starting voltage for the lamp at or above the minimum frequency. The arrangement inhibits lamp flickering and improves overall lamp and system efficiency.