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Beam angle sensor in virtual/augmented reality system

  • US 10,359,634 B2
  • Filed: 07/09/2018
  • Issued: 07/23/2019
  • Est. Priority Date: 01/12/2016
  • Status: Active Grant
First Claim
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1. A display system comprising:

  • a projection assembly configured to emit light;

    a sensing assembly configured to measure at least one parameter of light incident thereon;

    a waveguide apparatus;

    an in-coupling optical element optically coupled to the projection assembly and waveguide apparatus, the in-coupling optical element and configured to in-couple light from the projection assembly into the waveguide apparatus;

    a first out-coupling optical element disposed upon the waveguide apparatus and configured to direct light from the projection assembly guided within the waveguide apparatus out of the waveguide apparatus to an eye of a user;

    a second out-coupling optical element disposed upon the waveguide apparatus and optically coupled to the sensing assembly, the second out-coupling optical element configured to direct light from the projection assembly guided within the waveguide apparatus to the sensing assembly;

    a control subsystem in communication with the projection assembly and the sensing assembly, the control subsystem configured to;

    cause the projection assembly to emit light corresponding to a pixel of an image frame;

    receive measurement data from the sensing assembly indicating at least one parameter of light corresponding to the pixel of the image frame;

    determine, based on the measurement data received from the sensing assembly, an angle at which light corresponding to the pixel of the image frame is incident the sensing assembly; and

    control operation of the projection assembly based at least in part on the determined angle at which light corresponding to the pixel of the image frame is incident the sensing assembly.

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