ELECTRODELESS DISCHARGE LAMP LIGHTING DEVICE AND LUMINAIRE

摘要

PROBLEM TO BE SOLVED: To provide: an electrodeless discharge lamp lighting device capable of suppressing increase of noise due to resonance of a coupler while employing a dimming method of lighting an electrodeless discharge lamp with dimming by periodically changing over a lighting period to a non-lighting period; and a luminaire.

SOLUTION: The electrodeless discharge lamp lighting device 1 includes: a high-frequency power circuit 4 outputting high-frequency power; the coupler 3 arranged adjacently to the electrodeless discharge lamp 2 and supplied with the high-frequency power from the high-frequency power circuit 4 to cause a high-frequency electromagnetic field to act on a discharge gas of the electrodeless discharge lamp 2; and a dimming control circuit 5 controlling the high-frequency power circuit 4 to alternately change over, at a changeover frequency, a lighting period in which the high-frequency power supplied to the coupler 3 is set to a value allowing the electrodeless discharge lamp 2 to be lit, and a non-lighting period in which the high-frequency power is set to a value without lighting the electrodeless discharge lamp. The dimming control circuit 5 sets the changeover frequency to the high-frequency side relative to the natural frequency of the coupler 3.

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