Patent ID: 8303118
Filing Date: 2012-11-06
Classification: G03B

Abstract:
1. A video projector comprising: an optical component which transmits light to display an image; a cooling fan which generates a cooling current to cool the optical component; and a duct through which the cooling current circulates, with the duct including a first discharge port, and the first discharge port including: first and second wall surfaces opposed to each other in an optical axis direction in which the light is transmitted through the optical component; third and fourth wall surfaces opposed to each other in a lateral direction which is perpendicular to the optical axis direction; a discharge port inlet that is a duct side opening into which the cooling current from the cooling fan is drawn in a direction perpendicular to each of the optical axis direction and the lateral direction; and a discharge port outlet that is an optical component side opening from which the cooling current is sent toward the optical component in the direction perpendicular to each of the optical axis direction and the lateral direction, wherein the first to fourth wall surfaces of the first discharge port extend from the discharge port inlet to the discharge port outlet, and the first and second wall surfaces are spaced apart by a gap and the third and fourth wall surfaces are spaced apart by a gap, with the gaps becoming narrower from the discharge port inlet to the discharge port outlet.