| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact bulb type lamp which can suppress efficiently temperature rise of a light source and is capable of realizing operation reliability of a lighting circuit with small size and suppressing deterioration of its lifetime. <P>SOLUTION: The compact bulb type lamp includes a metallic enclosure member 3 having a peripheral part exposed to the outside, a light source installation part formed integrally with this peripheral part, and a recessed part formed inside the peripheral part, a base 31 arranged at the opening edge part of the recessed part, a light source substrate 12 on which the point light source is mounted and which is installed at the outside of the light source installation part so as to heat-conduct to the light source installation part, a fixing member 13 which is installed at the nearly center of the light source substrate and fixes the light source substrate to the enclosure member, and a lighting circuit 21 which has a circuit component, a lead wire of which one end is electrically connected to the circuit component and the other end is electrically connected to the light source and which is fixed to the peripheral part of the light source substrate, and a circuit board to which the lead wire and the circuit component are installed, and which is housed in the recessed part. <P>COPYRIGHT: (C)2007,JPO&INPIT |
