| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrodeless discharge lamp lighting device capable of reducing an electric stress applied to a circuit component. <P>SOLUTION: A starting operation of supplying an electric power necessary for lighting the electrodeless discharge lamp to an induction coil is finished at the time t1 when the voltage value Vdc of a direct current power output from a direct current power supply circuit to an inverter circuit reaches a predetermined lower limit voltage Vl, and a rest operation of decreasing a power supplied to the induction coil to a degree in which the electrodeless discharge lamp is not lighted is started. Thereby, the electric stress applied to the circuit component can be reduced in comparison with the case in which the starting operation is continued even after the voltage value Vdc becomes lower than the lower limit voltage. Also, the voltage value Vdc is slowly decreased right before starting at least the rest operation during the starting operation, and therefore the electrical stress applied to the circuit component at the start of the rest operation is reduced in comparison with the case in which the voltage value Vdc is set at a constant level during the starting operation. <P>COPYRIGHT: (C)2010,JPO&INPIT |
