ELECTRODELESS DISCHARGE LAMP LIGHTING DEVICE AND ELECTRODELESS DISCHARGE LAMP DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an electrodeless discharge lamp lighting device and an electrodeless discharge lamp device allowing the stable lighting of an electrodeless discharge lamp. SOLUTION: This lighting device is provided with a power conversion circuit 7 and a control circuit 5. The power conversion circuit 7 is made up of a switching circuit 3 and a resonant circuit 4, and converts a DC output of a DC power supply 6 into a high-frequency output responsive to a driving frequency of the switching circuit 3. The control circuit 5 adjusts the magnitude of the high-frequency output supplied to an induction coil 2 by controlling the driving frequency of the switching circuit 3. The control circuit 5 changes the driving frequency within a predetermined range. The driving frequency is thereby prevented from reaching an abnormal value, and it is thus possible to achieve the stable lighting of the electrodeless discharge lamp 1. COPYRIGHT: (C)2005,JPO&NCIPI