Lamp protective, electronic ballast

Details Lamp protective, electronic ballast Lamp protective, electronic ballast

1995-03-31

1996-02-20

Gonzalez, Frank

Electric lamp and discharge devices: systems

Automatic substitution of the load device or electrode

Over-voltage or over-current controlled substitution

315106, 315107, 315307, H05B 3910

Patent

active

054931800

ABSTRACT:
A lamp protective, electronic ballast includes a lamp voltage detector having a capacitor and resistor series connected across a discharge lamp. The junction of the resistor and capacitor is coupled to a voltage sensitive switch for detecting DC offset on the lamp and excessive AC voltage on the lamp. The switch is more sensitive to DC offset than to excessive AC voltage and is disabled while the lamp is started.

REFERENCES:
patent: 4513226 (1985-04-01), Josephson
patent: 4562383 (1985-12-01), Kerscher et al.
patent: 4893059 (1990-01-01), Nilssen
patent: 5099407 (1992-03-01), Thorne
patent: 5101140 (1992-03-01), Lesea et al.
patent: 5214355 (1993-05-01), Nilssen
patent: 5394062 (1995-02-01), Minarczyk et al.

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