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Projector apparatus with mirror means

  • US 4,875,064 A
  • Filed: 07/30/1987
  • Issued: 10/17/1989
  • Est. Priority Date: 08/06/1986
  • Status: Expired due to Term
First Claim
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1. A projector apparatus including, within a case having a display window equipped with a transmission type screen, a transmission type liquid crystal display panel, a light source means for illuminating said liquid crystal display panel from behind, and a projection lens means for projecting a display image of said liquid crystal display panel as an enlarged image on said transmission type screen, said projector apparatus comprising:

  • a first mirror means for reflecting light emitted from said light source to be incident substantially perpendicular to said liquid crystal display panel;

    a focusing lens means for focusing light transmitted through said liquid crystal display panel onto said projection lens means;

    a second mirror means for reflecting the focused light in the direction of an optical axis of said projection lens means to be incident on said projection lens means;

    a third mirror means for reflecting the light projected from said projection lens means in a direction parallel to said transmission type screen;

    a fourth mirror means for reflecting the light reflected by said third mirror means toward said transmission type screen; and

    wherein a plane is defined by light reflected from the first mirror means to the second mirror means and on to the third mirror means, said first, second and third mirror means each bend light that is respectively incident thereon by 90°

    in said plane, and said fourth mirror means reflects light in a direction perpendicular to said plane.

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