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. 27, 1993
Filed:
Oct. 07, 1991
Applicant:
Inventor:
Johannes H Wessels, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
3152 / ; 315224 ; 315D / ; 363 49 ;
Abstract
A circuit arrangement for operating a discharge lamp (4). The circuit arrangement is provided with a DC-AC converter (3) and with a starter circuit (5) for starting the DC-AC converter. The starter circuit comprises a circuit (50, 52, 53) for generating starting pulses through the charging of a capacitor (50). The starter circuit also includes a discharge resistor (51) for discharging the capacitor, and a switching element for disconnecting and for keeping the starter circuit disconnected. The starter circuit thus can generate starting pulses in quick succession so that the luminous flux of the lamp is controllable over a wide range.