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:
Jul. 23, 2013
Filed:
Feb. 01, 2010
Peter Hubertus Franciscus Deurenberg, S-Hertogenbosch, NL;
Wilhelmus Hinderikus Maria Langeslag, Wijchen, NL;
Henricus T. P. J. Van Elk, Ravenstein, NL;
Frank Van Rens, Horst, NL;
Peter Hubertus Franciscus Deurenberg, S-Hertogenbosch, NL;
Wilhelmus Hinderikus Maria Langeslag, Wijchen, NL;
Henricus T. P. J. van Elk, Ravenstein, NL;
Frank van Rens, Horst, NL;
NXP B.V., Eindhoven, NL;
Abstract
The present invention relates to a dimmer control circuit () capable to detect whether a phase-cut dimmer is connected using an average signal (VDCI) derived from the mains voltage. The average signal (VDCI) or a signal (VDCI_ls) derived from (VDCI), ranging from a minimum value to a maximum value, is compared to a dimming threshold (Vdim_th) through a phase-cut detecting unit (). The comparison result is used to control the state diagram of a dimmer control logic () by selecting the step dimming mode (STD) or the phase-cut dimming mode (PCD). The output (OUT) of a switching unit () is determined by the state diagram of the dimmer control logic () in such a manner that the phase-cut dimming mode (PCD) is prioritized above the step-dimming mode (STD) and the maximum level of the STD states is depending on the mains voltage and application adjustable.