| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lamp device capable of adapting to a higher output while maintaining a thin shape. <P>SOLUTION: A light source is fitted to one face side of a substrate 17, a base 20 is fitted to the other face side of the substrate 17, and a lighting circuit 21 is arranged inside the base 20. A base face part 51 is formed at a peripheral part of the other face of the base 20, and a base protrusion 53 is formed at the center part of the other face, protruded from the other face side of the base face part 51 and with an inner part opened toward the one face side. The lighting circuit 21 is provided with a lighting circuit board 88 larger than an inner diameter of the base protrusion 53, arranged inside the base 20 in opposition to the base face part 51 and one face side of the base protrusion 53, and lighting circuit components 89 mounted at least on the other face side of the lighting circuit board 88. Out of the lighting circuit components 89, ones with a larger protrusion dimension from the lighting circuit board 88 and a larger height are mounted on the other face center part of the lighting circuit board 88 to be arranged inside the base protrusion 53, and ones with a smaller protrusion dimension from the lighting circuit board 88 and a smaller height are mounted on the other face peripheral part of the lighting circuit board 88 to be arranged between the board and the base face part 51. <P>COPYRIGHT: (C)2012,JPO&INPIT |
