Patent ID: 6522082
Filing Date: 2003-02-18
Classification: H05B,Y02B

Abstract:
An illumination system comprising:a discharge lamp (L) having a dielectric layer between at least one electrode and a discharge medium and a ballast including a power-supplied primary circuit (P), a secondary circuit (S), into which the discharge lamp (L) is connected, a transformer (T) which connects the primary circuit (P) to the secondary circuit (S), and a storage capacitor (CQ) connected in parallel with a series circuit including a switching device (TQ, SE) and the primary circuit (P), the ballast impresses a voltage pulse on the secondary circuit (S) from the primary circuit (P) via the transformer (T), and the ballast interacting with the discharge lamp (L) in such a way that the voltage pulse leads to an external voltage (UL) effecting an ignition across the discharge lamp (L) and to an internal counterpolarization in the discharge lamp (L), a charge effecting the external voltage (UL) across the discharge lamp (L) is withdrawn from the discharge lamp (L) and a back ignition is produced in the discharge lamp (L) with aid of the internal counterpolarization remaining in the discharge lamp (L).