Patent ID: 8007114

Claim:
A projector comprising: a housing comprising a bottom wall and a first sidewall, a second sidewall, a first sidewall and a second sidewall, the bottom wall, the first sidewall, the second sidewall and the first and second sidewalls together defining a receiving space, the first sidewall defining a lens hole and a plurality of first vents, the second sidewall and the two sidewalls defining at least one second vent; a projection lens received in the housing with the magnification end thereof protruding out the housing from the lens hole, and located at an intersecting corner of the first sidewall and the first sidewall; a receiving member comprising a first receiving portion, and a second receiving portion communicating with and substantially perpendicular the first receiving portion, the first receiving portion located in the middle of the receiving space and parallel to the projection lens, the second receiving portion located at an intersecting corner of the second sidewall and the first sidewall; an optical engine received in the second receiving portion of the receiving member, and optically coupled to the projection lens; a light source module received in the first receiving portion of the receiving member, and optically coupled to the optical engine; a heat sink located at an intersecting corner of the first sidewall and the second sidewall, and comprising a first surface in contact with the first receiving portion of the receiving member, a second surface facing away the first surface, a third surface facing close to the first vents of the first sidewall, and a fourth surface facing away from the third surface; and a fan located at an intersecting corner of the fourth sidewall and the second sidewall, and adjacent to the heat sink.