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:
Nov. 06, 2007
Filed:
Jan. 24, 2006
Werner Longhino, Mehring, DE;
Andreas Mitze, Traunreut, DE;
Thomas Mudra, Kastl, DE;
Abstract
An apparatus for the closed-loop and open-loop control of filament heating for a lamp, in particular for a fluorescent lamp, has a control loop into which a first filament (W), an operational-parameter detection element (E), a heating controller (H) and a first actuating element (S) are connected. The heating poser of the first filament (W) is detected by means of the operational-parameter detection element (E) and, on the basis of this, a manipulated variable (SG) is determined, by means of which this first filament (W) is subjected to closed-loop control. Furthermore, at least one second filament (Wto Wn), which is not connected in the control loop, is controlled on the basis of the determined manipulated variable (SG).