Keep-out zone for in-field light sources of a head mounted display
AssigneeFacebook Technologies, LLC
InventorsKarol Constantine Hatzilias, Robin Sharma, Andrew John Ouderkirk, Qi Zhang, Christopher Yuan-Ting Liao
Life of this patent
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Abstract
Aspects of an illumination layer of a near-eye optical element for a head mounted display (HMD) are provided herein. The illumination layer includes a plurality of in-field light sources and a keep-out zone. The in-field light sources are configured to emit infrared light to illuminate an eye of a user of the HMD for imaging of the eye by an eye-tracking camera. The keep-out zone includes a center that is to be aligned with a center of the eye when the eye is in a centered orientation, where the in-field light sources are arranged within the illumination layer outside of the keep-out zone.
Claims18
A near-eye optical element comprising:
- an optical combiner configured to pass visible light and to receive reflected infrared light that is infrared light reflected by an eye of a user, wherein the optical combiner is further configured to direct the reflected infrared light towards an eye-tracking camera;
- and
- an illumination layer disposed between the optical combiner and an eyeward side of the near-eye optical element, wherein the illumination layer comprises:
- a transparent substrate;
- a plurality of in-field light sources disposed on the transparent substrate within a field of view of the user and configured to emit the infrared light to illuminate the eye of the user;
- and
- a keep-out zone that includes a center that is to be aligned with a center of the eye when the eye is in a centered orientation, wherein the plurality of in-field light sources are arranged within the illumination layer outside of the keep-out zone.
A head mounted display (HMD), comprising:
- an eye-tracking camera configured to capture an image of an eye of a user of the HMD;
- an optical combiner configured to pass visible light and to receive reflected infrared light that is infrared light reflected by the eye of the user, wherein the optical combiner is further configured to direct the reflected infrared light towards the eye-tracking camera;
- and
- an illumination layer disposed between the optical combiner and an eyeward side of the HMD, wherein the illumination layer comprises:
- a transparent substrate;
- a plurality of in-field light sources disposed on the transparent substrate within a field of view of the user and configured to emit the infrared light to illuminate the eye of the user;
- and
- a keep-out zone that includes a center that is to be aligned with a center of the eye when the eye is in a centered orientation, wherein the plurality of in-field light sources are arranged within the illumination layer outside of the keep-out zone.
Dependencies are inferred from the claim text.