| 摘要 |
PURPOSE: A light emitting device is provided to improve heat dissipation of fluorescent substance ceramics by efficiently transferring heat of the fluorescent substance ceramics to housing and releasing the heat through the housing. CONSTITUTION: A circuit board(2) comprises a base substrate(7) and a wiring pattern(8). An insulating layer is formed between the base substrate and the wiring pattern. The insulating layer prevents a short circuit between the wiring pattern and the base substrate. A light emitting diode(3) is electrically welded to the wiring pattern through a wire(9). Housing(4) is installed in the upper side from the base substrate. Fluorescent substance ceramics are adhered to the housing through an adhesive layer. |
