| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED lamp in which temperature rises of an electric component and an LED element on a power source circuit substrate housed in a case of the LED lamp are restrained, and with a high brightness and a long life. <P>SOLUTION: In the LED lamp 100, a power source circuit substrate 4 is vertically housed along a rotational axis line direction of a base 8 in a housing part 11 of a case 10, an electric component 41 with low maximum rated voltage is arranged at a lower side of the power source circuit substrate 4, an electric component 42 with a high exothermic temperature is arranged further upward than the electric component 41 with low maximum rated voltage, and is arranged so as to have a gap between the above two kinds of electric components in an up-and-down direction, and an upper end (an interface between resin and air) of potting heat radiation resin 6 with the power source circuit substrate 4 embedded is positioned between a nearly lower end of the electric component 41 with low maximum rated temperature and a lower end of the component with high exothermic temperature. <P>COPYRIGHT: (C)2013,JPO&INPIT |
