| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED marker lamp which carries out light distribution control in circumference direction by a prism by preventing occurrence of dew condensation. <P>SOLUTION: The LED marker lamp 1 is equipped with a light-emitting diode 2 mounted on a substrate 7, a prism 3 which has an inside space 9 and a hole 10 in which external air on the outside surface 3b side is ventilated in this inside space 9, is installed on the substrate 7 so as to cover the light-emitting diode 2 in the inside space 9 and has the hole 10 in a portion where emitting light from the light-emitting diode does not contribute mainly to formation of a prescribed light distribution, a cylindrical lamp body 4 in which the substrate 7 is arranged at the installation part 8 of one end side opening 4c, and a translucent protection cover 5 which covers the prism 3 and is installed detachably at one end side 4a of the lamp body 4 so as to cover the one end side opening 4c of the lamp body 4. <P>COPYRIGHT: (C)2009,JPO&INPIT |
