| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress reduction in luminous flux of an illumination device caused by luminous flux reduction of a light-emitting device having an LED chip and a reflecting part formed of silver to reflect light from the LED chip. <P>SOLUTION: The illumination device is equipped with a lighting part 1 including a plurality of light-emitting devices 11 in which the LED chip 11b is installed and arranged inside a package 11a and the reflecting part 11c composed of silver is formed at the surrounding of the LED chip 11b, a lighting device 2 to supply electric power to the lighting part 1, and a detecting part 7 having a silver-plated piece 7a. The lighting device 2 increases electric power to supply the lighting part 1 by a lighting part current adjusting part 24 when a rise in resistance value of the silver-plated piece 7a is detected. <P>COPYRIGHT: (C)2010,JPO&INPIT |
