| 摘要 |
The present invention relates to a lighting device. The lighting device according to an embodiment of the present invention comprises: a heat radiator including a first heat radiation unit having a first thermal conductivity and a second heat radiation unit combined to the first heat radiation unit and having a second thermal conductivity less than the first thermal conductivity; and a light source module disposed in the heat radiator and including a substrate and multiple light-emitting elements disposed on the substrate. The second heat radiation unit has an inner side part, an outer side part surrounding the inner side part, and a first storage part formed between the inner side part and the outer side part. The first heat radiation unit includes an upper part in which the light source module is disposed and a lower part disposed in the first storage part of the second heat radiation. The first heat radiation unit and the second heat radiation unit are restricted to be separated from each other. The upper part of the first heat radiation unit has a first hole, the second heat radiation unit has a second hole corresponding to the first hole of the first heat radiation unit, and the diameter of the first hole is less than that of the second hole. The lighting device in accordance with the embodiment above has advantageous effects like reducing the manufacturing costs. |
