Discharge lamp lighting device and system

Details Discharge lamp lighting device and system Discharge lamp lighting device and system

1982-02-18

1984-11-20

Moore, David K.

Electric lamp and discharge devices: systems

Plural power supplies

Diverse-type current supplies

315170, 315172, 315174, 315244, 331 75, H05B 3702

Patent

active

044841078

ABSTRACT:
In a discharge lamp lighting system comprising a DC or low frequency (LF) AC main source and a high frequency (HF) source, a high frequency component from the HF source and low frequency component from the main source are supplied in an overlapping manner to the discharge lamp. The HF source of the lighting device is energized by input current from the main source for producing a high frequency current. In addition, the lighting device for the discharge lamp include in combination an HF blocking circuit, an HF passing circuit and/or a matching circuit for the HF source to supply effectively a high frequency component to the discharge lamp, as well as a low frequency component from the main source. In a preferred embodiment, the discharge lamp lighting device includes an HF oscillating circuit for converting an LF component into an HF component and for supplying its intermittent output to the discharge lamp to reignite the discharge lamp at the initial part in each half cycle of the AC source, and to keep the lamp continuously lit.

REFERENCES:
patent: 1885728 (1932-11-01), Keith
patent: 3997814 (1976-12-01), Toho
patent: 4362971 (1982-12-01), Sloan, Jr.
patent: 4378513 (1983-03-01), Yoshikawa et al.

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