Patent ID: 8511834
Filing Date: 2013-08-20
Classification: G03B

Abstract:
1. A projection type display apparatus comprising: a lamp unit including a light source; a cooling fan cooling said light source; and a single cooling wind guide tube guiding a cooling wind generated by said cooling fan to said lamp unit, wherein said cooling wind guide tube has a movable type rectification plate which is movable by its own weight, and three divided flow paths, one of the three divided flow paths is central one between the remainder two ones of the three divided flow paths to enable the cooling wind to be directed toward a sealing portion of the light source, the remainder two ones of the three divided flow paths are opposed to each other through the one of the three divided flow paths in the gravitational direction to enable the cooling wind to be directed toward a light emitting portion of the light source, and the movable type rectification plate is movable by its own weight to guide the cooling wind toward the one of the three divided flow paths and toward any one of the remainder two ones of the three divided flow paths.