| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED lighting device capable of improving efficiency of illumination of an LED and extending its life by improving heat dissipation effect. <P>SOLUTION: In the LED lighting device 1, the LED which is a light source and a substrate 3 on which the former is mounted are housed in a sealed case 5. The substrate 3 is caused to tightly contact to the point of the sealed case 5 which is exposed to atmosphere. For example, the sealed case 5 consists of a large-diameter cylinder part 5A, a small-diameter cylinder part 5B, and a horizontal part 5C for connecting both 5A and 5B together. The outer periphery of the substrate 3 is caused to tightly contact to the inner surface of the horizontal part 5C, while the LED is mounted on the outer periphery. Further, a plurality of heat dissipation fins 7 are formed on the outer surface of the sealed case 5, and the LED is arranged at the position overlapping with the heat dissipation fin 7 in top view. <P>COPYRIGHT: (C)2011,JPO&INPIT |
