Method for determining a current viewing direction of a user of data glasses with a virtual retina display and data glasses
AssigneeRobert Bosch GmbH
InventorJohannes Meyer
Life of this patent
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Abstract
A method for determining a current viewing direction of a user of a pair of data glasses having a virtual retina scan display. The method includes at least the method steps: projecting at least substantially parallel infrared laser beams onto an eye of a user of the data glasses, acquiring two-dimensional images from the infrared laser beams reflected back by the eye of the user, and determining pupil contours in the acquired two-dimensional images. The instantaneous viewing direction of the user of the data glasses is ascertained from a comparison of an instantaneous elliptical shape of the pupil contour with an elliptical shape of a reference pupil contour.
Claims12
A method for determining a current viewing direction of a user of a pair of data glasses having a virtual retina scan display, the method comprising the following steps:
- projecting at least substantially parallel infrared laser beams onto an eye of a user of the data glasses;
- acquiring two-dimensional images from the infrared laser beams reflected back by the eye of the user;
- and
- determining pupil contours in the acquired two-dimensional images;
- wherein an instantaneous viewing direction of the user of the data glasses is ascertained from a comparison of an instantaneous elliptical shape of the pupil contour with an elliptical shape of a reference pupil contour.
Data glasses having a virtual retina scan display, the data glasses comprising:
- a scanned laser projector configured to project at least substantially parallel infrared laser beams onto an eye of a user of the data glasses;
- a detector configured to acquire two-dimensional images from the infrared laser beams reflected back by the eye of the user;
- a computing unit configured to determine pupil contours from the acquired two-dimensional images, wherein the computing unit is configured to ascertain an instantaneous direction of view of the user of the data glasses from a comparison of an instantaneous elliptical shape of the pupil contour with an elliptical shape of a reference pupil contour.
Dependencies are inferred from the claim text.