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Calibration of magnetic and optical sensors in a virtual reality or augmented reality display system

  • US 10,534,043 B2
  • Filed: 09/25/2017
  • Issued: 01/14/2020
  • Est. Priority Date: 09/26/2016
  • Status: Active Grant
First Claim
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1. A system for calibrating alignment of two or more magnetic sensors in a virtual reality (VR) or augmented reality (AR) display device, the system comprising:

  • a controller;

    a waveform generator configured to generate a first calibration waveform and a second calibration waveform under control of the controller;

    a first conductive loop oriented in a first plane orthogonal to a first axis passing through the first conductive loop;

    a second conductive loop oriented in a second plane parallel to the first plane and spaced apart from the first conductive loop along the first axis; and

    an electrical driver connected to the waveform generator to receive the first and second calibration waveforms, to generate corresponding first and second electrical output currents, and to provide the first and second electrical output currents to the first conductive loop and the second conductive loop,wherein the controller is configured to cause the waveform generator to generate the first calibration waveform to calibrate a first type of magnetic sensor in the display device, and to generate the second calibration waveform to calibrate a second type of magnetic sensor in the display device.

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