| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a discharge lamp-lighting device and an illumination fixture using the discharge lamp-lighting device, wherein it is not necessary to cause a stand-by preheat current to flow in a filament when the discharge lamp is turned off, and moreover the lamp is instantly lighted when lighting, and furthermore, an excess stress is not given to an inverter switch and a short period blinking life of the discharge lamp is not impaired. <P>SOLUTION: The discharge lamp-lighting device 1 includes: a DC power source 19; an inverter circuit 11 to convert a DC voltage to a high frequency voltage; an inverter control circuit 22 in order to control an operation frequency of the inverter circuit 11; and a preheating circuit 13 in order to supply a foregoing preheating current to the electrodes of the discharge lamp La. The foregoing preheating time is set by the inverter control circuit 22 so that the area ratio of current×time of the foregoing preheating current concerning the minimum rated voltage and the maximum rated voltage out of a plurality of rated power supply voltage becomes 1:1.2 to 1.6. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
