| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent dew condensation from being generated beforehand, while properly maintaining an operation performance of a heating member. <P>SOLUTION: A cooling device comprises: LDs 18, 20 and LED 19 which are provided in an enclosure; Peltier elements 26, 29, 32 which are provided to the LDs 18, 20 and LED 19 and absorb heat from the LDs 18, 20 and LED 19; a cooling fan 36 which introduces external air into the enclosure and applies the introduced airflow to the LDs 18, 20 and LED 19 to cool them; temperature sensors 27, 30, 33 which detect the temperatures of the LDs 18, 20 and LED 19; and, a CPU 40 and a projection light drive part 39 which determine whether or not the LDs 18, 20 and LED 19 are in super-cooled states based on the detected temperatures, and decrease cooling performance in the Peltier elements 26, 29, 32 and increase the cooling performance in the cooling fan 36 when determining that the LDs 18, 20 and LED 19 are in super-cooled states. <P>COPYRIGHT: (C)2012,JPO&INPIT |
