Patent ID: 6826059
Filing Date: 2004-11-30
Classification: H05B,Y02B

Abstract:
A circuit arrangement for supplying voltage and controlling the operating behavior of at least one light-emitting diode for illumination purposes, said circuit arrangement comprising:at least one inverter that is connectable to a direct-voltage source and whose output frequency is variable, said inverter comprising at least two controllable power switches connected to convert a supplied direct voltage, delivered by a direct-voltage source, into a bipolar alternating voltage and a load circuit connected to an output of the inverter, said load circuit comprising a resonance element and containing at least one light-emitting diode, said load circuit connected to be driven by said bipolar alternating voltage, the switching frequency of the power switches being alterable to control the brightness of the at least one light-emitting diode by controlling the current flowing through the at least one light-emitting diode.