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Display apparatus and method

DC
  • US 6,909,473 B2
  • Filed: 01/07/2002
  • Issued: 06/21/2005
  • Est. Priority Date: 01/07/2002
  • Status: Expired due to Term
First Claim
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1. A display apparatus comprising:

  • (a) a light source for forming a beam of light;

    (b) a pre-polarizer for polarizing said beam of light to provide a polarized beam of light;

    (c) a wire grid polarization beamsplitter for receiving said polarized beam of light, for transmitting said polarized beam of light having a first polarization, and for reflecting said polarized beam of light having a second polarization, wherein sub-wavelength wires on said wire grid polarization beamsplitter face a reflective liquid crystal device;

    (d) wherein said reflective liquid crystal device selectively modulates said polarized beam of light having a first polarization to encode image data thereon in order to form a modulated beam, and then reflects said modulated beam back to said wire grid polarization beamsplitter;

    (e) a compensator, located between said wire grid polarization beamsplitter and said reflective liquid crystal device, for conditioning the polarization states of oblique and skew rays of said modulated beam to provide a compensated modulated beam;

    (f) wherein said wire grid polarization beamsplitter reflects said compensated modulated beam;

    (g) a polarization analyzer which removes residual light of an opposite polarization; and

    (h) image-forming optics for forming an image from said compensated modulated beam.

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