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Display control apparatus having a cursor

  • US 4,768,028 A
  • Filed: 03/28/1986
  • Issued: 08/30/1988
  • Est. Priority Date: 03/29/1985
  • Status: Expired due to Fees
First Claim
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1. Display control apparatus which includes alignment means for determining the direction of a sight-line extending from observer to a display surface, projection means for introducing an image of a graticule into the sight-line for movement therewith, and control means responsive to said alignment means and operable to cause a movable cursor to be displayed and positioned on the display surface at the intersection of the sight-line and the display surface and to remove the image of the graticule when the cursor is displayed whereby said control means causes the display of said movable cursor on said display surface when said alignment means determines that the observer'"'"'s line of sight intersects said display surface.

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