Switching system and method for operating at least one discharge lamp

Abstract

Various embodiments relate to a circuit arrangement for operating at least one discharge lamp (LL). In order to prevent intrinsic flicker at low dimming settings and low temperatures, according to various embodiments, a direct current which is fed into the discharge lamp so as to avoid striated discharges at relatively high dimming settings is reduced or entirely eliminated. In adddition, the invention also relates to a corresponding method which is used to operate at least one discharge lamp.

Description

technical field [0001] The invention relates to a circuit arrangement for operating at least one discharge lamp, which circuit arrangement has an input with a first input connection and a second input connection for coupling to a DC voltage source, a bridge circuit with At least one first electronic switch and a second electronic switch and at least one coupling capacitor, wherein the first electronic switch and the second electronic switch are connected in series between the first input terminal and the midpoint of the first bridge with which the bridge circuit is designed Between the second input connection; the first output connection and the second output connection for coupling with the upper (hochliegenden) filament of the discharge lamp; the third output connection for coupling with the lower (tiefliegenden) filament of the discharge lamp and a fourth output connection; a lamp choke coil connected in series between the midpoint of the first bridge and any one of the out...

AI Technical Summary

Problems solved by technology

[0004] Therefore, an operating state in which inherent flicker occurs has not been ruled out hitherto for the discharge lamps in question.

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