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Waveguide display with a small form factor, a large field of view, and a large eyebox

  • US 10,585,287 B2
  • Filed: 12/07/2018
  • Issued: 03/10/2020
  • Est. Priority Date: 12/20/2016
  • Status: Active Grant
First Claim
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1. A waveguide system comprising:

  • a coupling element for in-coupling light into a waveguide, the coupling element changing a direction of a wavevector by a first amount;

    a first one-dimensional decoupling grating configured to receive light from the waveguide and to change the direction of the wavevector by a second amount by diffracting at least a first portion of the in-coupled light;

    a second one-dimensional decoupling grating configured to change the direction of the wavevector by a third amount by diffracting at least a second portion of the in-coupled light and to output the redirected light to an eyebox, the second one-dimensional decoupling grating facing opposite the first one-dimensional decoupling grating, a sum of the first amount, second amount, and third amount being substantially zero and predetermined based on a location of the eyebox,wherein the first one-dimensional decoupling grating and the second one-dimensional decoupling grating overlap along a direction parallel to a surface of the waveguide.

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