Patent ID: 7794089
Filing Date: 2010-09-14
Classification: G03B,H04N

Abstract:
1. A liquid crystal projection system, comprising: a light source module providing an illumination light beam of first polarization state; a light management module including a color separator, first and second reflectors, a phase plate, a first polarization beam splitter, a second polarization beam splitter and a dichroic prism, the color separator separating the illumination light beam of first polarization state from the light source module into a first color light beam of first polarization state and a bichromatic light beam of first polarization state, the first and second reflectors respectively reflecting the first color light beam of first polarization state and the bichromatic light beam of first polarization state from the color separator, the phase plate converting the bichromatic light beam of first polarization state into a bichromatic light beam of second polarization state, the first polarization beam splitter receiving the first color light beam of first polarization state from the first reflector, the second polarization beam splitter directly cemented to the first polarization beam splitter and receiving the bichromatic light beam of second polarization state from the phase plate, the dichroic prism directly cemented to the second polarization beam splitter and separating the bichromatic light beam of second polarization state from the second polarization beam splitter into a second color light beam of second polarization state and a third color light beam of second polarization state; an image signal module including first, second and third image modulation units, the first image modulation unit disposed adjacent to the first polarization beam splitter and transforming and modulating the first color light beam of first polarization state from the first polarization beam splitter into a first color light beam of second polarization state carrying first image signal, the second image modulation unit disposed adjacent to the dichroic prism and transforming and modulating the second color light beam of second polarization state from the dichroic prism into a second color light beam of first polarization state, the third image modulation unit disposed adjacent to the dichroic prism and transforming and modulating the third color light beam of second polarization state from the dichroic prism into a third color light beam of first polarization state; and a projection lens disposed adjacent to the second polarization beam splitter and projecting the first, second and third color light beams carrying corresponding image signals from the second polarization beam splitter to a screen.