Optical system for liquid crystal projector

Optical system for liquid crystal projector

  • CN 100,354,690 C
  • Filed: 12/02/2001
  • Issued: 12/12/2007
  • Est. Priority Date: 12/02/2000
  • Status: Active Grant
First Claim
Patent Images

1. the optical system of a liquid crystal projection apparatus, the monochrome image that this projector will be realized on first to the 3rd reflective liquid crystal panel respectively is synthetic, and to be used to amplify the projection of the image that is synthesized, described optical system comprises:

  • The light source that emits white light;

    White light is converted into predetermined linearly polarized photon and launches the illuminace component of this linearly polarized photon;

    Conversion is the first color alternative pack of another kind of polarized light with the linear polarization light polarization of illuminace component being sent according to wavelength coverage;

    AndColor identifying/compound component, it will split according to color from the light of the first color alternative pack incident, to make it to incide respectively on first to the 3rd reflective liquid crystal panel, and the light of synthetic from first to the 3rd liquid crystal panel acquisition image information, be transmitted into the projection lens system that is used for enlarging projection with the light that will be synthesized;

    Wherein, first to the 3rd liquid crystal panel is arranged to first to three surface of partial face to color identifying/compound component, projection lens system is arranged to part towards the 4th surface of color identifying/compound component, and the first color alternative pack be arranged to towards with the 3rd liquid crystal panel towards another part of similar face of color identifying/compound component;

    Described optical system also comprises the second color alternative pack, when the P polarization screen of transmission P polarized light only as by the screen of the composograph imaging thereon of projection lens system amplification/projection the time, the light that the described second color alternative pack will be propagated between color identifying/compound component and projection lens system changes the P polarized light into;

    The described first and second color alternative packs are by polarization change green light and with the intactly transmission of other light;

    The described first color alternative pack changes green S polarized light into the P polarized light, and with redness and the intactly transmission of blue S polarized light;

    The described second color alternative pack becomes the P polarized light with green S polarized light and with redness and the intact transmission of blue P polarized light.

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