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:
Mar. 13, 2012
Filed:
Aug. 30, 2006
Olaf Busse, München, DE;
Markus Heckmann, Guangzhou, CN;
Reinhard Lecheler, Neuburg/Donau, DE;
Alfons Lechner, Hohenwart, DE;
Siegfried Mayer, Moosinning, DE;
Thomas Pollischansky, Stadtbergen, DE;
Bernd Rudolph, Forstern, DE;
Bernhard Schemmel, Wessling, DE;
Kay Schmidtmann, München, DE;
Harald Schmitt, München, DE;
Thomas Siegmund, Otterfing, DE;
Arwed Storm, Dachau, DE;
Horst Werni, München, DE;
Olaf Busse, München, DE;
Markus Heckmann, Guangzhou, CN;
Reinhard Lecheler, Neuburg/Donau, DE;
Alfons Lechner, Hohenwart, DE;
Siegfried Mayer, Moosinning, DE;
Thomas Pollischansky, Stadtbergen, DE;
Bernd Rudolph, Forstern, DE;
Bernhard Schemmel, Wessling, DE;
Kay Schmidtmann, München, DE;
Harald Schmitt, München, DE;
Thomas Siegmund, Otterfing, DE;
Arwed Storm, Dachau, DE;
Horst Werni, München, DE;
Osram AG, Munich, DE;
Abstract
The present invention relates to an electronic ballast for discharge lamps (LA) which have preheatable electrodes (E, E). The electronic ballast has a measuring apparatus (M), which is designed to measure, during the preheating process, a variable, which is correlated with the electrode temperature increased by the preheating, of at least one of the electrodes (E, E) of a connected discharge lamp (LA), and a control apparatus (C), which is designed to match the electrode temperature, during the preheating process, in response to the measurement by adjusting an operational parameter of the electronic ballast. Furthermore, the electronic ballast is designed to detect cross discharges or a sufficient operating temperature of one of the electrodes (E, E) and possibly to ignite the discharge.