Patent ID: 7926954

Claim:
A projector comprising: a casing whereon a first opening and a second opening are respectively formed on two opposite sides thereof; a light source installed inside the casing and positioned between the first opening and the second opening; a light shield disposed on the first opening and connected with the casing, the light shield comprising a fixing plate positioned parallel to the first opening, a plurality of first light-shielding plates, and a plurality of second light-shielding plates, the first light-shielding plates and the second light-shielding plates being perpendicularly connected to the fixing plate and respectively located at a top side and a bottom side of the fixing plate, the fixing plate having a central line in a middle thereof, the first light-shielding plates and the second light-shielding plates being respectively arranged at two opposite lateral sides of the central line, a first line being used to indicate where a plane of one of the first light-shielding plates intersects the central line in the top plane view, a second line being used to indicate where a plane of one of the second light-shielding plates intersects the central line in the top plane view, an intersection of the first line and the central line does not meet an intersection of the second line and the central line, and the first light-shielding plates and the second light-shielding plates being staggered obliquely so that no straight-line path from a top side to a bottom side as viewed in a top plane view of the fixing plate capable of avoiding the first light-shielding plates or the second light-shielding plates; and a heat dissipation device disposed on the second opening and connected with the casing.