| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a beacon light 12 made without a transformer, capable of simplifying a structure of a cutout device 17. <P>SOLUTION: A light-emitting diode element 15 is used as a light source of a beacon light 12. With the use of the light-emitting diode element 15, an output current and voltage of a constant-current power source 13 can be made low, and a lighting circuit 16 and the cutout device 17 can be connected in parallel to the constant-current power source 13 without a transformer. The light-emitting diode element 15 is put on at low current with little heat generation and with heat generation at operation of the cutout device restrained, so that a protective circuit using a heat-sensitive element is done away with to simplify a structure of the cutout device 17. <P>COPYRIGHT: (C)2008,JPO&INPIT |
