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Display systems

  • US 4,167,113 A
  • Filed: 11/25/1977
  • Issued: 09/11/1979
  • Est. Priority Date: 12/03/1976
  • Status: Expired due to Term
First Claim
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1. A display system comprising a display unit for providing a display representation in a display area, an optical element, means for deriving an image of said display representation via said optical element, sensor means, said sensor means responding to displacement of said image from a reference established with respect to the said display unit, and modifying means, said modifying means being arranged to modify the disposition of said display representation in said display area in accordance with the response of said sensor means to displacement of said image from said referemce such as to compensate for movement of said optical element relative to said display unit.

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