To efficiently dissipate heat into a liquid and further dissipate the heat to the outside in a light source device, in which light-emitting elements are immersed in liquid, while keeping insulating property of the lighting device.
In a lamp module in which light-emitting elements 1 are immersed in an insulating, inactive and translucent liquid 4, fins 8 are provided on a part of the container that is in tough with the liquid 4. For example, when translucent parts of the container are partitioned by a metal frame, fins 7 are provided on the metal frame. Also, the metal frame may be extended to contact the container of the lighting device. Furthermore, when a metal-base substrate is used for the substrate on which the light-emitting elements 1 are mounted, fins 8 are provided on the metal-based substrate. Also, a metallic member that is immersed in the liquid is provided separately and is pulled to the outside to be joined with the container of the lighting device.
SHIOHAMA EIJI
KIMURA HIDEYOSHI
HASHIZUME JIRO
