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:
May. 29, 2012
Filed:
Jul. 31, 2007
Kai Wolter, Berlin, DE;
Kai Wolter, Berlin, DE;
Osram AG, Munich, DE;
Abstract
The present invention relates to a method for operating an illumination system, which illumination system has a high pressure discharge lamp driven with a commutating lamp current (IL), and a color filter system for filtering the light of the high pressure discharge lamp in a plurality of sequential color segments (A, B, D, E, G, H). The invention further relates to an illumination system for embodying the inventive method, and to a computer program product which can be loaded into an inventive illumination system in order to configure said illumination system in accordance with the inventive method. According to the invention, prior to a commutation in an intermediate phase (ZP), the lamp current (IL) passes through an intermediate phase pulse (DP), during which the light of the illumination system is suppressed. When a change occurs in the course of the lamp current preceding the intermediate phase (ZP), the intermediate phase pulse (DP) occurring in the intermediate phase is adapted in such a way that the change is at least partially compensated in the effect thereof on the electrode temperature at the time of the commutation.