LED LIGHTING SYSTEM Russian patent published in 2017 - IPC H05B33/08 

FIELD: lighting.

SUBSTANCE: power supply circuit, which is designed to supply the LED current, is equipped with input terminals (K1 and K2), which are intended for connection to a supply voltage source and output terminals (K3 and K4), a modulation scheme (MS, DC2), connected between the output terminals, which is designed to alternately maintain the voltage between the output terminals at a high level during the first time interval and at a low level during the second time interval, a current sensor (R1, R2, S1), which is designed to read current flowing through the output terminals during the second time interval, a defining circuit (DC1, DC2), connected between the input terminals and the output terminals, and connected to a current sensor which is designed to generate LED current from the supply voltage supplied by the power source, where the LED current is equivalent to the current read by the current sensor multiplied by a predetermined constant factor, and is also intended to supply LED current to the output contacts during each first time interval. The LED lighting system further comprises a LED module including LED module input terminals (K5, K6), which are intended for connection to the output terminals of the power supply circuit, LED element load (LS) connected between the input terminals of the LED module with direct voltage exceeding the voltage between the output terminals of the power supply circuit during each second time interval, and a current source (CS), connected between the LED module input terminals, which is designed, in the case of LED module input contacts connection to the power supply source output contacts to generate sensor current during each second time interval, to flow through the current sensor, which is equivalent to the required LED current divided by the predetermined constant factor.

EFFECT: simplified circuit and reduced number of wiring connections in the LED lighting system.

5 cl, 4 dwg