| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat sink for LED lighting which enables efficient heat release by heat radiation.SOLUTION: Planar heat radiation surfaces 10, 11 are integrally and continuously formed around an LED element 9 attached to a flat surface 3 of a substrate 2. A light guide path 21 formed by a semicircular curve surface that is recessed from the substrate flat surface 3 is provided at the front side of an LED element 9 mounting position of the substrate flat surface 3. A projection lens 25 is supported by a tip 22 of the light guide path 21, and heat generated when the LED element 9 emits light is released into a surrounding space composed of a closed space by radiation. |
