Patent ID: 7832872

Claim:
A projector, comprising: a light-source device comprising a light-source lamp for emitting a light and a reflection cover, the light-source lamp being disposed in an internal space of the reflection cover; a guiding passage having an inlet and an outlet, the outlet being disposed adjacent to the light-source lamp; a block, disposed in the vicinity of the outlet, a length and a width of a cross section of the block being smaller than a length and a width of a cross section of the outlet respectively, the cross section of the outlet being divided into a first interval Y 1 , a second interval Y 2 , and a third interval Y 3 by the block, the third interval Y 3 being located between the first interval Y 1 and the second interval Y 2 ; and a fan, disposed adjacent to the inlet of the guiding passage, for blowing an air flow into the guiding passage; wherein when the air flow passes the block, the air flow is divided into a first air flow, a second air flow, and a third air flow, the first air flow enters the internal space and cools a first portion of the light-source lamp, the second air flow enters the internal space and cools a second portion of the light-source lamp, and the third air flow enters the internal space and cools a third portion of the light-source lamp, thereby, the temperature of the light-source lamp is maintained stably.