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:
Oct. 13, 2015
Filed:
Mar. 05, 2012
Michael Haacke, Aachen, DE;
Lars Dabringhausen, Baesweiler, DE;
Xaver Riederer, Aachen, DE;
Heinz Helmut Huedepohl, Aachen, DE;
Michael Haacke, Aachen, DE;
Lars Dabringhausen, Baesweiler, DE;
Xaver Riederer, Aachen, DE;
Heinz Helmut Huedepohl, Aachen, DE;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
The invention describes a method of driving a gas-discharge lamp () according to conditions in a specific region (R) of the lamp (), which gas-discharge lamp () comprises a burner () in which a first electrode () and a second electrode () are arranged on either side of a discharge gap, which lamp () is realised such that the position (PCs) of a coldest spot during an AC mode of operation is in the vicinity of the first electrode (), which method comprises the steps of initially driving the lamp () in the AC mode of operation; monitoring an environment variable of the lamp (), which environment variable is indicative of conditions in a specific region (R) of the lamp (); switching to a temporary DC mode of operation at a DC power value on the basis of the monitored environment variable, whereby the first electrode () is allocated as the anode; and driving the lamp () in the DC mode of operation until the monitored environment variable has returned to an intermediate environment variable threshold value (T). The invention also describes a gas-discharge lamp and a driver for a gas-discharge lamp.