Patent ID: 7616266
Filing Date: 2009-11-10
Classification: G03B,H04N

Abstract:
1. A liquid crystal projection system, comprising: a light source for emitting a white light source; a polarizing component for polarizing said white light source to generate a polarized light source; a dichroic mirror for receiving said polarized light source and splitting said polarized light source into dual primary color lights and a single primary color light having a first predetermined polarization for output; a half wavelength retardation plate disposed between said dichroic mirror and a reflecting prism for receiving said single primary color light and then reflecting said single primary color light for output; a first polarizing component disposed at another output side of said dichroic mirror for receiving and then polarizing said dual primary color lights; a second polarizing component disposed at an output side of said reflecting prism for receiving said single primary color light and then outputting said single primary color light with said first predetermined polarization; a dichroic component disposed beside said first polarizing component for receiving and splitting said dual primary color light; said reflecting prism being a first parallelogram-shaped body, said first and second polarizing components being a second parallelogram-shaped body, and said dichroic component being a third parallelogram-shaped body; wherein said first, said second and said third parallelogram-shaped bodies are integrated into a single Z-shaped prism module; a modulating device disposed beside said second polarizing component and said dichroic component for receiving, modulating into another polarization, and then reflecting for output said dual primary color lights and said single primary color light; and a projection lens disposed beside said first polarizing component for receiving said modulated dual and single primary color lights and projecting out to a screen for display, wherein said single primary color light having the same optical path length as said dual primary color lights.