Augmented reality displays with active alignment and corresponding methods
First Claim
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.
1 Assignment
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Accused Products
Abstract
Binocular augmented reality display devices and corresponding methods allow alignment calibration to be performed by an end user. According to one approach, a camera is positioned to have a field of view which includes simultaneously part of a projected image from the left-eye display and part of a projected image from the right-eye display. By projecting via each display at least part of a calibration image and identifying within the camera-sampled image right-field and left-field alignment features, an alignment correction can be derived. Alternative approaches employ correlation of images sampled by forward-looking cameras rigidly associated with the respective right-eye and left-eye display units, or require a user to input a manual adjustment for aligning transversely-swapped camera images with the real world view.
120 Citations
9 Claims
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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:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification