Patent ID: 8063575

Claim:
A current supply circuitry for at least one luminescent diode supplied with a.c. current via a current supply mains, comprising: at least one inductive reactance connected as a storage choke in series with the luminescent diode, switching stages for switching over between a charging or a discharging process occurring in the storage choke upon over-shooting or under-shooting of threshold values of respective control voltages of the switching stages; a free running current path, connected parallel to the series connection of the luminescent diode and the storage choke, for at least a part of the discharge current released by the storage choke to the luminescent diode upon blocking of one of the switching stages; a first shunt measurement resistance for detecting the diode current flowing through the luminescent diodes during a charging process occurring in the storage choke; and a second shunt measurement resistance for detecting the diode current flowing through the luminescent diode during the discharging process occurring in the storage choke.