LED light source and lamp comprising such a LED light source

摘要

A LED light source comprises:
a first rectifier with a first and a second input terminal for connection to an AC supply voltage source and a first and a second output terminal connected by a first LED-string,a second rectifier having a first and a second input terminal and output terminals, said first input terminal of said second rectifier being coupled to the first input terminal of the first rectifier and the second input terminal of the second rectifier being coupled to the second input terminal of the first rectifier, and the output terminals being connected by a second LED-string, andmeans for causing a phase shift between the voltages that are present during operation at the output terminals of the first rectifier and the output terminals of the second rectifier respectively.;The LED strings are driven by very simple circuitry that can be supplied by mains supply voltage. Due to the phase shift stroboscopic effects are suppressed.

主权项

1. An LED light source comprising:
a first rectifier with a first and a second input terminal for connection to an AC supply voltage source and a first and a second output terminal and a first LED-string comprising a first plurality of LEDs coupled between the first output terminal and second output terminal, a second rectifier having a first and a second input terminal and output terminals, said first input terminal of said second rectifier being coupled to the first input terminal of the first rectifier and the second input terminal of the second rectifier being coupled to the second input terminal of the first rectifier, and a second LED string comprising a second plurality of LEDs being coupled between the output terminals, and means for causing a phase shift between the voltages that are present during operation at the output terminals of the first rectifier and the output terminals of the second rectifier respectively.