Patent ID: 6334685
Filing Date: 2002-01-01
Classification: H04N

Abstract:
A color video projector apparatus having high luminous efficiency, comprising:a light source producing polychromatic light and having a predetermined power dissipation; a color modulating device receiving the polychromatic light and separating it into first, second, and third light beams comprising alternating and mutually exclusive first, second, and third colors; a light pipe having first, second, and third input apertures positioned to receive the respective first, second, and third light beams, the light pipe homogenizing the first, second, and third light beams and propagating them from respective first, second, and third output apertures; a light valve having an addressable area that is sub-addressable as first, second, and third addressable segments that respectively receive from the light pipe the first, second, and third light beams; a controller conveying to the first, second, and third addressable segments colored video data corresponding with the sequentially alternating and mutually exclusive first, second, and third colors propagated by the color modulating device such that the light valve propagates a polychromatic image; and a projection lens focusing the polychromatic image on a projection screen with a predetermined luminance.