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. 10, 2012
Filed:
Jan. 25, 2007
Christian Breuer, Newburyport, MA (US);
Kai Wolter, Berlin, DE;
Christian Breuer, Newburyport, MA (US);
Kai Wolter, Berlin, DE;
OSRAM AG, München, DE;
Abstract
A circuit arrangement () for operation of a high-pressure discharge lamp having a commutation device (K), which has an input (E, E) for coupling to a DC voltage source and has an output (A, A) for coupling to the high-pressure discharge lamp (EL). A control apparatus () is configured to commutate the polarity with which the voltage (U), which is applied to the input (E, E) of the commutation device (K), is coupled to the output (A, A) of the commutation device (K). A synchronization apparatus () is configured to provide a synchronization signal (Sy) at its output (A, A). A timer apparatus () is configured to produce a commutation initiation signal (KA) at its output (A, A), which commutation initiation signal (KA) is synchronized with a predeterminable operating frequency of the high-pressure discharge lamp (EL). A pattern apparatus () stores a choice of possible commutation times, with the choice of the possible commutation times being synchronized in time to the synchronization signal (Sy).