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:
Aug. 30, 2016
Filed:
Mar. 21, 2013
Tridonic Gmbh & CO KG, Dornbirn, AT;
TRIDONIC GMBH & CO KG, Dornbirn, AT;
Abstract
The invention relates to a method for activating at least one LED, which is supplied with a direct current voltage or a rectified alternating current voltage and which by means of a coil (L) and a first switch (S) clocked by a control/regulating unit (SR) provides a supply voltage for at least one LED, wherein when the first switch (S) is switched on the coil (L) temporarily stores energy that discharges via a diode (D) and at least one LED when the first switch (S) is switched off and wherein the control unit (SR) activates the first switch (S) by means of a dimming signal. Said method is characterized in that the dimming signal is generated by externally combining a low-frequency signal and a high-frequency signal, wherein the pulse width (TON*LF) of the low-frequency signal is selected as an integral multiple of the cycle duration of the high-frequency signal.