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Low profile liquid crystal projector and method of using same

  • US 5,321,450 A
  • Filed: 05/11/1993
  • Issued: 06/14/1994
  • Est. Priority Date: 05/11/1993
  • Status: Expired due to Term
First Claim
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1. A projector, comprising:

  • low profile elongated housing means having a hollow interior;

    high intensity light means mounted within a rear portion of said low profile housing means for illuminating a light path;

    liquid crystal display means disposed within said hollow interior disposed forwardly of said light means along said path for forming a liquid crystal image;

    optic means disposed within said hollow interior for defining the light path extending angularly through said liquid crystal display means offset by an angle λ

    relative to the normal axis plane of said liquid crystal display means for helping to reduce image keystoning;

    top output mirror means disposed above said low profile housing means for projecting reflectively said liquid crystal image onto a remote viewing surface without introducing any substantial image keystoning;

    means for mounting said top output mirror means inclined angularly opposite of said liquid crystal display means for reflecting said liquid upwardly at angle θ

    relative to the normal axis plane of said remote viewing surface; and

    said angle λ and

    said angle θ

    being substantially equal, whereby the liquid crystal image formed by said liquid crystal display means is illuminated by the high intensity light means, reflected along a portion of said irregularly shaped light path and projected reflectively onto said remote viewing surface without any substantial image keystoning.

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