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:
Mar. 05, 2019
Filed:
Jun. 08, 2015
Philips Lighting Holding B.v., Eindhoven, NL;
PHILIPS LIGHTING HOLDING B.V., Eindhoven, NL;
Abstract
The invention describes a dynamic control circuit () realized for connection in series with an LED arrangement (), characterized by a first switching element (Q) realized to provide a path for the LED current (I), and a monitoring arrangement (M) realized to control the first switching element (Q) according to the level of the LED current (I) SO that the dynamic control circuit () presents a series impedance (Z), which series impedance (Z) gradually increases in response to a decreasing LED current (I) through the LED arrangement (). The invention also describes a dimmable lighting arrangement () comprising an LED arrangement (); a driver () realized to provide an input voltage (V) and an input current (I) to the LED arrangement (); and such a dynamic control circuit () connected in series with the LED arrangement (). The invention further describes retrofit LED light-bulb (); and a method of driving an LED arrangement.