Ignition control circuit for gas discharge lamps

Details Ignition control circuit for gas discharge lamps Ignition control circuit for gas discharge lamps

2005-06-28

2005-06-28

Vu, David (Department: 2828)

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

Pulsating or a.c. supply to the cathode or heater circuit

C305S107000, C305S136000

Reexamination Certificate

active

06911778

ABSTRACT:
The disclosure includes an ignition control circuit comprising a transformer having at its secondary side an operating winding, and at least one filament winding. In a pre-heating phase, only the filament winding, which is normally connected to the filaments of a lamp, is active. In this way, the filaments of the lamp are heated first. After a predetermined time, the secondary operating winding is switched on, by a triac. This triac is a compact component producing no or little heat. The invention provides a simple and economic ignition circuit for gas discharge lamps.

REFERENCES:
patent: 3710065 (1973-01-01), Crapuchettes
patent: 5030887 (1991-07-01), Guisinger

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