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METHOD AND MEANS FOR PROVIDING A SYNTHETIC REAL WORLD RUNWAY DISPLAY

  • US 3,643,213 A
  • Filed: 11/24/1969
  • Issued: 02/15/1972
  • Est. Priority Date: 11/24/1969
  • Status: Expired due to Term
First Claim
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1. A system in an aircraft for displaying a perspective synthetic runway corresponding to a runway at an airport;

  • comprising means for providing deflection voltages and bright-up pulse voltages for displaying a synthetic runway;

    means for providing signals corresponding to the location of the aircraft with respect to the airport runway;

    means for providing signals corresponding to the attitude of the aircraft;

    means for providing a signal corresponding to the altitude of the aircraft;

    means connected to the voltage means and to each signal means for modifying the deflection voltages in accordance with the location, attitude and altitude signals;

    a cathode-ray tube connected to the modifying means and to the voltage means for displaying the perspective synthetic runway corresponding to the airport runway in accordance with the modified deflection voltages from the modifying means and with the bright-up pulse voltages from the voltage means;

    each cycle of a predetermined proGram of deflection voltages divided into eight time periods and the voltage means including means for providing a first horizontal deflection voltage, means for providing a second horizontal deflection voltage, means for providing a vertical deflection voltage, means for providing bright-up pulse voltages, and program means connected to each deflection voltage means and to the bright-up pulse voltage means for controlling said means in accordance with said predetermined program to provide deflection voltages and bright-up pulse voltages for the synthetic runway display;

    the second horizontal deflection voltage means including a voltage divider dividing a positive direct current voltage and providing a plurality of outputs, and first switching means connected to the program means and to the voltage divider for sequentially passing the outputs from the voltage divider during the fourth through seventh time periods in accordance with a signal from the program means to provide a negative going step voltage as the second deflection voltage.

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