Patent ID: 8425046

Claim:
A cooling device applied in a projection apparatus, wherein the projection apparatus comprises a first light source, a second light source and a third light source, and the cooling device comprises: an airflow guiding device defining a first flow path and a second flow path; and a fan generating an airflow, in which the airflow is divided into a first airflow and a second airflow travelling along the first flow path and the second flow path, respectively; wherein the first flow path has a first position, the second flow path has a second position and a third position, the first light source, the second light source and the third light source are disposed at the first position, the second position and the third position respectively, the first airflow flows through the first position of the first flow path and effuses outward via a plurality of first air vents that are formed at an end of the first flow path, and the second airflow flows through the second position and the third position of the second flow path in sequence and effuses outward via a plurality of second air vents and a plurality of third air vents that are formed at an end of the second flow path, in which the plurality of the second air vents is located between the second position and the third position.