| 摘要 |
A cooling unit main body 25 having vapor diffusion flow paths 42 which extend to the peripheral portion and capillary flow paths 41 formed between the vapor diffusion flow paths 42 and in a concave portion opposite region 47 is provided with a thin concave portion 6 in which an LED chip 2 is mounted. Accordingly, heat from the LED chip 2 can be easily transferred by what corresponds to the thinning of the concave portion 6, and successive circulating phenomenon caused by a refrigerant W is repeated by the heat, and the heat is surely drawn from the LED chip 2 by latent heat at a time when the refrigerant W vaporizes, so that a heat pipe 5 can maintain the light emitting state of the LED chip 2 stably. |
