| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting apparatus, having multiple light-emitting diodes capable of preventing the light-emitting diodes from becoming high temperature. <P>SOLUTION: The lighting apparatus 1 includes a tapered columnar part 11; a substrate 30 which has multiple light-emitting diodes 32 and arranged in contact with the side of the columnar part 11; and a heat radiating part 12 positioned on the root side of the columnar part 11 to contact with air. The heat emitted from the light-emitting diodes 32 is sequentially conducted to the substrate 30, the columnar part 11, and the heat radiation part 12 in the lighting apparatus 1. The root side of the columnar part 11 is located close to the heat radiation part 12 and the section area is set large so that a lot of heat amount can be conducted to the heat radiation part 12. The end side cannot have many light-emitting diodes 32, so the heat generated amount itself can be suppressed. Accordingly, a light-emitting diode 32 disposed at any position of the columnar part 11 can be prevented from becoming high temperature. <P>COPYRIGHT: (C)2011,JPO&INPIT |
