| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light-emitting device capable of efficiently cooling a light-emitting section emitting light by receiving exciting light. <P>SOLUTION: A headlight 1 includes a laser diode 3 for emitting a laser beam, a light-emitting section 7 for light-emitting by receiving the laser beam emitted from the laser diode, and a reflecting mirror 8 and a transparent plate 9 for storing a cooling liquid 71 used for cooling the light-emitting section 7. The cooling liquid 71 is stored in a space 80 defined by the reflecting mirror 8 and the transparent plate 9, temperature of the cooling liquid 71 located in the vicinity of the heated light-emitting section 7 is raised by being heated with the heated light-emitting section 7, and the cooling liquid 71 which is not heated moves to the vicinity of the light-emitting section 7. Upon generating such a convection phenomenon, the light-emitting section 7 can be efficiently cooled, and deterioration of the light-emitting section can be prevented. <P>COPYRIGHT: (C)2012,JPO&INPIT |
