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:
Sep. 17, 1996
Filed:
Aug. 03, 1994
Applicant:
Inventor:
Gunter Johler, Bregenz, AT;
Assignee:
Tridonic Bauelemente GmbH, Dornbirn, AT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315194 ; 315D / ; 315224 ; 315307 ; 315205 ;
Abstract
An electronic ballast (2) which includes an electronic harmonics filter (7), the brightness of a lamp (38) can be determined by employment of a dimmer (1) provided in the mains feed, in that a desired value signal (UM) for setting the frequency (f) of the switch (S) is supplied to the controller (8), which desired value signal depends upon the input or output voltage of a rectifier (4) connected downstream of the dimmer (1), in particular dependent upon the curve form of this voltage.