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Controlling actions in a video game unit

  • US 8,947,347 B2
  • Filed: 05/04/2006
  • Issued: 02/03/2015
  • Est. Priority Date: 08/27/2003
  • Status: Active Grant
First Claim
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1. A method for controlling actions in a video game unit having a hand held controller configured for three-dimensional movement, the method comprising configuring a processor for:

  • receiving an inertial signal from an inertial sensor on the controller;

    receiving an optical signal generated with one or more light sources on the controller;

    determining a current position of the controller using the inertial signal, the current position determined using the inertial signal being subject to drift that accumulates over time, the drift being a discrepancy between the determined current position of the controller and an actual position of the controller;

    receiving one or more images of the light sources obtained with a single camera;

    separately determining a reference position of the controller from the one or more images; and

    correcting for the drift that accumulates over time by re-setting the current position of the controller to the reference position separately determined from the one or more images.

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