Patent ID: 7545107
Filing Date: 2009-06-09
Classification: H05B,Y02B

Abstract:
1. An electrodeless discharge lamp lighting device comprising: an induction coil wound in the vicinity of an electrodeless discharge lamp; a power supply circuit for outputting a DC voltage; an inverter circuit which has at least one switching element and which converts the DC voltage output from the power supply circuit into a high-frequency voltage and outputs the high-frequency voltage to the induction coil; and a frequency varier that disperses the frequency of a noise by varying the frequency of the high-frequency voltage output from the inverter circuit to the induction coil at the time of lighting the electrodeless discharge lamp, wherein a frequency variation range Δf of the high frequency voltage output from the inverter circuit satisfies the expression: wherein, fav represents an average frequency of the high frequency voltage output from the inverter circuit to the induction coil at the time of lighting the electrodeless discharge lamp, and Q