| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve heat dissipation characteristics by considering arrangement of an LED light-emitting part and a printed board of its lighting circuit part. <P>SOLUTION: A direct current power supply unit B including electronic parts 2 to 5 mounted and arranged on a first printed board 1, and the LED light-emitting part A in which the LED 6 that emits light by an output of the direct current power supply unit B is mounted and arranged on a second printed board 7 are provided in a fixture cabinet 8. The first printed board 1 and the second printed board 7 are arranged nearly vertically, and housed in the fixture cabinet 8. A lead wire 9 is installed between the first printed board 1 and the second printed board 7, and the first printed board 1 and the second printed board 7 are shielded from each other by a heat-dissipating plate 11 that has no holes other than a hole 10 through which the lead wire 9 is made to pass. <P>COPYRIGHT: (C)2009,JPO&INPIT |
