Importance

Loading Importance Indicators...

Abstract

A projection-type video display apparatus includes: a light source; an illumination optical system; a video display device; and a projection optical system, and the illumination optical system includes: a multireflection device which makes a distribution of light from the light source uniform; a color wheel which decomposes a color of light from the multireflection device; and a lens which enlarges light from the color wheel. When two orthogonal axes on a plane perpendicular to a traveling direction of the light are respectively defined as an X axis and a Y axis, a curvature radius of the lens in an X-axis direction differs from a curvature radius of the lens in a Y-axis direction. An aspect ratio of an emission surface of the multireflection device is larger than an aspect ratio of the video display device. The lens may be a cylindrical lens or a toroidal lens.

Loading the Abstract Image...

First Claim