Discharge-lamp lighting device and luminaire

Details Discharge-lamp lighting device and luminaire Discharge-lamp lighting device and luminaire

2007-05-24

2011-10-18

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Periodic-type current and/or voltage regulator in the supply...

C315S2090SC, C315S224000, C315S291000, C315S307000

Reexamination Certificate

active

08040074

ABSTRACT:
There is provided a discharge-lamp lighting device that, upon start-up of a high-intensity discharge lamp, alternately outputs a period A during which a starting circuit applies a high voltage to the high-intensity discharge lamp by resonance operation when a DC/AC inverter outputs a high-frequency voltage, and a period B during which the DC/AC inverter applies a low-frequency-square-wave voltage or a DC voltage to the high-intensity discharge lamp via the starting circuit. The period A for applying the high voltage by the resonance operation is set to about a time enough for a high-intensity discharge lamp in an initial aging stage to cause a dielectric breakdown, and a period C for alternately outputting the high-voltage generating period A and the period B for outputting the low-frequency-square-wave voltage or the DC voltage is set to about a time enough for a high-intensity discharge lamp in a life's last stage to cause a dielectric breakdown.

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English language Abstract of JP 2002-75677, Mar. 15, 2002.
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Japanese Office Action, mailed Oct. 19, 2010.

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