Patent ID: 6139155
Filing Date: 2000-10-31
Classification: H04N

Abstract:
A projector having three optical modulation devices that respectively modulate three color beams, a color synthesizing optical system that synthesizes the three color beams modulated by said optical modulation devices, and a projection lens that projects the light beams synthesized by said color synthesizing optical system, said color synthesizing optical system having a prism with two wavelength selective films arranged nearly in the shape of an X, said three optical modulation devices facing three side faces of said prism, said projector display device comprising:a head body having said prism, said three optical modulation devices, and said projection lens mounted thereon, said prism being mounted on a prism bearing face of said head body;a fan disposed on an opposite side of the prism bearing face of said head body from said prism; anda fan frame attached on said prism bearing face at a plurality of points so as to hold said fan,said fan frame having a surface that faces said prism bearing face and is shaped substantially in a quadrangle shape, and one of two diagonal lines passing through opposite corners of said quadrangle extends nearly along a plane that includes an optical axis of said projection lens, said plane being orthogonal to said prism bearing face.