US Patent No. 10,342,079

FILTER LED LAMP ARRANGEMENT


Patent No. 10,342,079
Issue Date July 02, 2019
Title Filter Led Lamp Arrangement
Inventorship Shounak Roy, Maarssenbroek (NL)
Martijn Jeroen Dekker, Groningen (NL)
Assignee Silicon Hill B.V., Amsterdam (NL)

Claim of US Patent No. 10,342,079

1. An LED lamp suitable for use in a luminaire, the LED lamp adapted for receiving electrical power from the luminaire and comprising:one or more LEDs;
a ballast protection circuit including an impedance;
a filter circuit;
a switched-mode power supply for driving the one or more LEDs;
one or more sensing circuits for generating at least one output, in dependence on whether the electrical power received from the luminaire indicates that the electrical power is provided via a magnetic ballast, an electronic ballast which operates as a constant current ballast, an electronic ballast which operates as a constant power ballast, or not via a ballast; and
a plurality of switches for defining a plurality of operation modes of the LED lamp, and for switching among the plurality of operation modes in dependence on the at least one output from the one or more sensing circuits, wherein the plurality of operation modes comprise:
a first operation mode, in which the switched-mode power supply operates at an operation frequency, the filter circuit is connected for filtering noise generated by the switched-mode power supply, and the ballast protection circuit is disconnected;
a second operation mode, in which the switched-mode power supply does not operate, the filter circuit is disconnected, the ballast protection circuit is connected, and the impedance is bypassed; and
a third operation mode, in which the switched mode power supply does not operate, the filter circuit is disconnected, the ballast protection circuit is connected, and the impedance is connected in series with the LEDs.