High frequency lighting apparatus having an intermediate potenti

Details High frequency lighting apparatus having an intermediate potenti High frequency lighting apparatus having an intermediate potenti

1995-09-27

1998-03-17

Pascal, Robert

Electric lamp and discharge devices: systems

Plural power supplies

Diverse-type current supplies

315219, 315DIG7, H05B 3700

Patent

active

057290954

ABSTRACT:
A high frequency (HF) lighting apparatus includes a rare gas discharge lamp and a power supply. The lamp has an envelope having a rare gas therein. A pair of electrodes is provided in the envelope, and an external conductor is provided near the envelope. The power supply includes a HF electric power circuit to generate a HF electric power. The HF electric power circuit has an output whose crest factor is 2.3 or more. The power supply has a ballast coupled between the HF electric power circuit and the lamp for applying stabilized HF current to the lamp. The power supply further has a DC supply circuit including a rectifier for rectifying the HF to DC and a voltage divider. The voltage divider is disposed between the lamp and the rectifier for applying a potential to the external conductor of the lamp and for adding a DC current to the stabilized HF current.

REFERENCES:
patent: 2091953 (1937-09-01), Becquemont
patent: 3778677 (1973-12-01), Kriege
patent: 3909666 (1975-09-01), Tenen
Mayer et al., Discharge Lamps, 1988, 114-115.

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