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:
Jan. 28, 1992
Filed:
Nov. 27, 1990
Egbert Van Zanten, Grave, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A circuit arrangement for igniting a high-pressure discharge lamp (6), in which ignition voltages are generated by means of discharges from two capacitors (10, 14) through a primary winding (12) of a transformer. During this, the lamp (6) is connected to a secondary winding (4) of this transformer. One capacitor (14) is charged to a higher voltage than the other capacitor (10), the two capacitors being discharged alternately through breakdown elements (11, 15) associated with the capacitors (10, 14, respectively). An ignition pulse with a low peak value for igniting the lamp (6) in the cold state is then followed by an ignition pulse with a high peak value for igniting the lamp (6) if it should be in the hot state.