| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an LED lighting device which can easily obtain illumination light whose output is made constant and color temperature is made different. <P>SOLUTION: A first light emitting module 13 having LED 16 and a second light emitting module 14 having LED 21 whose color temperature differs from that of LED 16 are connected to a constant voltage power supply 12. A control part 15 controls respective transistors 18 and 23 so that a sum of lighting current of LED 16 and that of LED 21 becomes constant. Thus, illumination light whose output is made constant and color temperature is made different can easily be obtained. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
