Patent ID: 6290360
Filing Date: 2001-09-18
Classification: G03B

Abstract:
A liquid crystal projector capable of illuminating a plurality of liquid crystal panels with light rays, and of projecting transmitted light rays traveled through said liquid crystal panels through a plurality of prisms and a protection lens on a screen, said liquid crystal projector comprising a plurality of cooling fans for cooling said liquid crystal panels, at least one of said plurality of cooling fans being disposed beside said protection lens;wherein at least one of said plurality of cooling fans is used specially for cooling said liquid crystal panels;wherein said cooling fan used specially for cooling said liquid crystal panels is connected to said liquid crystal panels by a cooling fluid duct defining a cooling fluid passage divided into a plurality of branch cooling fluid passages; andwherein said respective dimensions of said plurality of branch cooling fluid passages are determined so that a flow rate or a velocity at which a cooling fluid is supplied to a green-light liquid crystal panel of said liquid crystal panels is greater than those at which said cooling fluid is supplied to said rest of said liquid crystal panels.