Discharge lamp lighting device and system

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

H - Electricity

05

B

315/55

H05B 41/24 (2006.01) H05B 41/38 (2006.01)

Patent

CA 1184237

TITLE OF THE INVENTION: DISCHARGE LAMP LIGHTING DEVICE AND SYSTEM ABSTRACT OF THE DISCLOSURE: 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 includes 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 fre- quency 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 supp]ying 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. - 1 -

397520

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