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Abstract visual display system

  • US 3,081,557 A
  • Filed: 04/06/1960
  • Issued: 03/19/1963
  • Est. Priority Date: 04/06/1960
  • Status: Expired due to Term
First Claim
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1. A VISUAL DISPLAY SYSTEM FOR SIMULATING THE APPEARANCE OF AIRFIELD LANDING LIGHTS AS SEEN FROM A SHIFTING VIEWPOINT COMPRISING A CATHODE RAY TUBE AND INCLUDING HORIZONTAL AND VERTICAL CONTROL CIRCUITS TO POSITION AN ELECTRON BEAM, A BINARY COUNTER, AN ELECTRONIC CLOCK FOR PROVIDING A SAWTOOTH SIGNAL TO THE HORIZONTAL CONTROL CIRCUITS AND A PLURALITY OF PULSES TO THE BINARY COUNTER, A FUNCTION GENERATOR INCLUDING A BINARY TO ANALOG CONVERTER CIRCUIT COUPLED TO SAID BINARY COUNTER FOR PROVIDING CONTROL SIGNALS TO SAID CONTROL CIRCUITS TO CONTROL THE VERTICAL POSITION OF SAID ELECTRON BEAM, AND UNBLANKING MEANS RESPONSIVE TO ADDITIONAL SIGNALS DERIVED FROM SAID FUNCTION GENERATOR FOR UNBLANKING SAID ELECTRON BEAM SELECTIVELY TO PROVIDE THE DESIRED VISUAL DISPLAY.

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