| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device with improved heat radiation performance.SOLUTION: A lighting device 1 includes: a light emitting section 4 including an LED; a plate-like module plate 3 where the light emitting section 4 is disposed on one surface 3b so as to be thermally coupled thereto; a heat sink 8 which is disposed on the other surface of the module plate 3 so as to be thermally coupled to the light emitting section 4; and a case 2 which is disposed so as to cover the heat sink 8. The case 2 is connected with an outer edge part 3e of the module plate 3 thereby thermally coupling to the light emitting section 4 through the module plate 3. Multiple vent holes 3c are provided at the module plate 3 and a bridge part 3d forms a part of a heat conduction passage between the light emitting section 4 and the case 2. The bridge part 3d exists in a region A1 sandwiched by two straight lines l3. |
