| 摘要 |
PROBLEM TO BE SOLVED: To provide a LED illumination fixture capable of improving starting-up of light output at the time of starting and restraining variation of the light output caused by ambient temperature. SOLUTION: In the LED illumination fixture having an LED light-emitting section 2 including light-emitting diodes 2a-2d and a lighting-up circuit 4 supplying current for making the LED light-emitting section 2 light up the light-emitting diodes 2a-2d built in an fixture case, a control section is arranged in the lighting-up circuit 4 so as to make the light output from the illumination device approximately constant. The current flowing to the LED light-emitting section 2 is controlled to be minimized at the time of stabilized lighting at low temperature wherein ambient temperature is lower than normal temperature. Furthermore, the current being larger at the time of stabilization flows to the LED light-emitting section 2 when an input power source is applied to the lighting-up circuit 4 at low temperature wherein ambient temperature is lower than the normal temperature. COPYRIGHT: (C)2009,JPO&INPIT
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