Patent ID: 6481854
Filing Date: 2002-11-19
Classification: G02F,G03B

Abstract:
A projection type display apparatus comprising:a housing: at least one light valve arranged in said housing for forming an image light; a projection lens arranged in said housing for projecting in enlarged form the image light formed by said at least one light valve; at least one heat generating member arranged in said housing; at least one first fan for introducing cooling air into said housing so that said at least one light valve is exposed to said cooling air; at least one second fan arranged in said housing so that said at least one heat generating member is exposed directly to the cooling air; and at least one third fan for exhausting the cooling air out of said housing; wherein said at least one heat generating member includes a light source and said at least one light valve includes a plurality of light valves for realizing color display, and said at least one first fan includes a plurality of first fans arranged to introduce cooling air into said housing such that each said first fan directly blows cooling air to a corresponding one of said light valves.