Image display unit

  • US 5,760,931 A
  • Filed: 10/13/1994
  • Issued: 06/02/1998
  • Est. Priority Date: 12/14/1992
  • Status: Expired due to Term
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First Claim
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1. An image display unit comprising:

  • image forming means for forming a display image;

    reflecting means for reflecting light emitted from said image forming means; and

    display means for forming said display image from light emitted from said image forming means and reflected by said reflecting means, said display means having a first curvature in a first direction and a second curvature in a second direction perpendicular to said first direction, said first curvature being smaller than said second curvature,wherein said reflecting means is provided between said image forming means and said display means, and has optical characteristics of a concave mirror with a curvature being larger than zero in any direction, said reflecting means having a third curvature in a third direction optically parallel to said first direction and a fourth curvature in a fourth direction optically parallel to said second direction, said third curvature of said reflecting means being larger than said fourth curvature thereof so as to offset distortion of said display image caused by said first and said second curvatures of said display means.

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