Illumination device has series LEDs, each with parallel-connected electronic unit with low impedance switch element, diode, threshold switch, capacitor whose voltage supplies threshold switch and is fed to threshold switch as its input

摘要

The device has several LED light sources (1) connected in series and supplied by an electrical power supply. Each LED has an associated parallel-connected electronic unit consisting of a low impedance switch element (T1), a diode (D1), a threshold switch (SWS1) and a capacitor (C1) whose voltage is used to supply the threshold switch and is also fed to the threshold switch as its input.