| 摘要 |
The invention relates to a LED lighting system comprising a power supply circuit and at least one LED module. The power supply circuit comprises input terminals (K1, K2) for connection to a supply voltage source and output terminals (K3, K4),and a driver circuit (I, II) coupled between the input terminals and the output terminals for generating a LED current out of a supply voltage supplied by the supply voltage source, and comprising a driver control circuit (II) with an input terminal (K7) for receiving a current control signal and for generating a LED current in dependency of the current control signal. The at least one LED module comprises input terminals (K5, K6) for coupling to the output terminals of the power supply circuit,a LED load (LS) coupled between the input terminals, and a module control circuit for generating a current control signal as a square wave shaped signal comprising a first part having a first amplitude during a first time lapse representing a desired magnitude of the LED current, said module control circuit comprising an AC coupling of the current control signal to the input terminal of the driver control circuit. |
