Device and method for directly operating a plurality of light emitting diodes on a pulsating DC voltage

摘要

To a device for direct operation of a plurality of light-emitting diodes (LEDs) on a pulsating DC voltage, in particular at a mains voltage, with LED groups, each comprising at least one LED of the plurality of LEDs, with a plurality of power control circuits for driving a respective LED Group, wherein the current control circuits are designed such that, with increasing current value over time as a function of a predetermined threshold current for the respective LED current flows through the respective LED group, so to improve that the light emitting diodes with minimal flicker, preferably flicker, can be operated at a pulsating DC voltage, it is proposed that each current control circuit comprises at least one charge storage, which is assigned to each one LED group, and that the charge storage in the current control circuit is arranged so that it can be loaded with increasing current value over time and is at least partially dischargeable in the course of time decreasing current value by a discharging via the LED group discharge current. Furthermore, an improved method for directly operating a plurality of light emitting diodes (LEDs) on a pulsating DC voltage is proposed.