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Waveguide display with spatially switchable grating

  • US 10,185,393 B2
  • Filed: 04/03/2017
  • Issued: 01/22/2019
  • Est. Priority Date: 04/03/2017
  • Status: Active Grant
First Claim
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1. A near-eye-display (NED) system comprising:

  • an eye tracking system configured to track a location of an eye of a user of the NED;

    a light source configured to emit an image light;

    an output waveguide comprising;

    an input grating configured to receive the image light emitted from the light source and expand the received image light in at least one dimension to transmit an expanded image light, anda dynamic output grating comprising a plurality of liquid crystal (LC) pixels that are arranged in a two-dimensional array, the plurality of LC pixels including an active subset of LC pixels that are configured to out-couple the expanded image light from the output waveguide to the tracked location in accordance with switching instructions; and

    a controller configured to generate the switching instructions and provide the switching instructions to the dynamic output grating.

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