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Augmented reality displays with active alignment and corresponding methods

  • US 10,506,220 B2
  • Filed: 01/03/2019
  • Issued: 12/10/2019
  • Est. Priority Date: 01/02/2018
  • Status: Active Grant
First Claim
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1. A method for deriving an alignment correction between a right-eye display and a left-eye display of a binocular augmented reality display device, the method comprising the steps of:

  • (a) positioning a camera having a field of view so that the camera field of view includes simultaneously part of a projected image from the left-eye display and part of a projected image from the right-eye display;

    (b) projecting via each of the right-eye display and left-eye display at least part of a calibration image comprising a plurality of alignment features including at least one right-field alignment feature and at least one left-field alignment feature;

    (c) employing the camera to sample an image;

    (d) identifying within the image the right-field alignment feature and the left-field alignment feature; and

    (e) deriving from a position within the image of the right-field alignment feature and the left-field alignment feature an alignment correction between the right-eye display and the left-eye display of the augmented reality display device,wherein a first of the plurality of alignment features is viewed by the camera via the right-eye display only and a second of the plurality of alignment features is viewed by the camera via the left-eye display only.

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