Discharge lamp driving apparatus and lighting fixture using the apparatus
AssigneeToshiba Lighting & Technology Corporation
InventorsKiyoteru Kosa, Fuminori Nakaya
Life of this patent
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Abstract
A discharge lamp driving apparatus includes, a direct current power supply having a rectifier, an inverter circuit, which has stable and unstable output terminals, converting a direct current power to an alternating current power with a predetermined high frequency and driving a discharge lamp having a folded portion, a controller for being able to dim the discharge lamp, and an auxiliary conductor, arranged to the folded portion of the discharge lamp, and electrically connected to the stable potential output terminal of the inverter.
Claims7
A discharge lamp driving apparatus comprising:
- a direct current power supply having a rectifier;
- an inverter circuit, which has stable and unstable output terminals, converting a direct current power to an alternating current power with a predetermined high frequency and driving a discharge lamp having a folded portion;
- a controller for being able to dim the discharge lamp;
- and
- an auxiliary conductor, arranged to the folded portion of the discharge lamp, and electrically connected to the stable potential output terminal of the inverter.
A discharge lamp driving apparatus comprising:
- an alternating current power source, which one end of output terminal is connected to a ground terminal;
- a direct current power supply having a rectifier;
- an inverter circuit, which has stable and unstable output terminals, converting a direct current power to an alternating current power with a predetermined high frequency, and driving a discharge lamp having a folded portion;
- a controller for being able to dim the discharge lamp;
- and
- an auxiliary conductor, arranged to the folded portion of the discharge lamp, and electrically connected to the ground potential terminal.
A lighting fixture comprising:
- a lighting fixture body;
- and
- a discharge lamp driving apparatus comprising a direct current power supply having a rectifier, an inverter circuit, which has stable and unstable output terminals, converting a direct current power to an alternating current power with a predetermined high frequency, and driving a discharge lamp having a folded portion, a controller for dimming the discharge lamp, an auxiliary conductor, located to the folded portion of the discharge lamp, and electrically connected to the stable potential output terminal of the inverter.
Dependencies are inferred from the claim text.