Passive world-referenced display alignment with reflective facet lightguides
AssigneeGoogle Inc.
InventorDaniel Adema
Life of this patent
Estimating the term…
Abstract
A head-worn display (HWD) is configured to maintain the angle at which light leaves an outcoupler even as the HWD moves. To this end, the HWD includes an optical engine configured to emit display light. Additionally, the HWD includes a lightguide that has an incoupler and an outcoupler. The incoupler is configured to reflect the display light emitted from the optical engine such that the display light propagates through the lightguide by performing an even number of bounces before being received by the outcoupler. The outcoupler then provides the display light to the eye of a user.
Claims27
A head-worn display (HWD), comprising:
- an optical engine configured to emit display light;
- and
- a lightguide including an incoupler and an outcoupler, wherein:
- the incoupler is configured to reflect the display light such that the display light propagates through the lightguide by performing an even number of bounces before being received by the outcoupler.
(canceled)
A lightguide for a head-worn display (HWD), comprising:
- an outcoupler including one or more reflective facets;
- and
- an incoupler including one or more reflective facets configured to reflect display light such that the display light propagates through the lightguide by performing an even number of bounces before being received by the outcoupler.
A method, comprising:
- reflecting, by an incoupler of a lightguide, display light into the lightguide such that the display light propagates through the lightguide by performing an even number of bounces before being received at an outcoupler of the lightguide;
- and
- directing, by the outcoupler of the lightguide, the display light out of the lightguide at an angle.
(canceled)
(canceled)
Dependencies are inferred from the claim text.