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Target video game avoiding erroneous counts

  • US 4,205,847 A
  • Filed: 11/23/1977
  • Issued: 06/03/1980
  • Est. Priority Date: 11/23/1976
  • Status: Expired due to Term
First Claim
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1. A videogame including a line and frame scanned television receiver comprising:

  • a circuit for generating a light spot symbol on a line-scanned screen of a television receiver;

    a target detector directable to the light spot symbol moving on the screen;

    a photosensor incorporated in the target detector for receiving light energy emitted from the light spot on the screen;

    a trigger arm attached to the target detector for actuating a switch which controls signals to be sent to the television display set through cables or wireless transmission;

    an output stage of the target detector for sending signals which are modulated by the frequency selected light pulses for a hit of the target and which are unmodulated for a direction missing shot;

    an input stage for receiving the signals sent by the output stage;

    an amplification stage for amplifying the signals received from the input stage;

    a pulse converter stage connected to the amplification stage for generating a pulse of a first duration for an incoming modulated signal and for generating a pulse of a second duration different from the first duration for an incoming unmodulated signal;

    integration stages with different time constants to which the pulses from the pulse converter are fed for providing a control signal when the pulses surpass a defined threshold;

    and counting and display stages for receiving control signals from the integration stages and for counting and displaying the occurrences of hits and shots wherein said counting stage comprises electronic counters including evaluation circuits for counting these signals for registering a hit if the time cycle coincides for actuating the trigger arm of the target detector and for the pulse resulting from conversion of the light impinging on the photosensor and for registering a shot corresponding to actuation of the trigger arm and which causes the moving light spot on the screen to extinguish automatically when a hit occurs, said moving light spot being modulated with the line scanning and frame frequency; and

    a frequency selective circuit for selecting and evaluating the electrical signals generated by the light received in the photosensor of the target detector when the direction of the target detector coincides with the moving light spot symbol such that only pulses of the light spot symbol with the frequency of the line or frame scanning are transmitted to the evaluation circuits.

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