Rare gas fluorescent lamp lighting apparatus

Details Rare gas fluorescent lamp lighting apparatus Rare gas fluorescent lamp lighting apparatus

2007-09-25

2007-09-25

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Periodic switch in the primary circuit of the supply...

C315S291000

Reexamination Certificate

active

11195746

ABSTRACT:
There is provided a rare gas fluorescent lamp lighting apparatus including: an input power source; a transformer having a rare gas fluorescent lamp connected to the secondary side thereof; a switching element connected in series to the primary side of the transformer; and a drive block to drive the switching element. The drive block includes: a constant voltage circuit to convert the voltage of the input power source into a constant voltage as an output; a constant current circuit to output a charging current according to the voltage of the input power source; a triangular waveform oscillation circuit to increase and decrease oscillation frequency according respectively to an increase and a decrease in a voltage of the input power source; and a comparison circuit to transform a triangular waveform outputted from the triangular waveform oscillation circuit into a rectangular waveform with a predetermined duty ratio as an output.

REFERENCES:
patent: 6225751 (2001-05-01), Komatsu
patent: 6548966 (2003-04-01), Kawasaka et al.
patent: A 2001-15284 (2001-01-01), None

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