TRANSPARENT OPTICAL ELEMENT WITH LINE-OF-SIGHT INFRARED LIGHT SOURCE FOR EYE TRACKING
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United States of America Patent
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May 16, 2024
app pub date -
Nov 13, 2022
filing date -
Jun 15, 2022
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Abstract
A wearable optical assembly includes a transparent optical element and a set of multiple light-emitting elements positioned on or within the optical element. The optical assembly positions the optical element in a sight line of a user wearing the optical assembly. Each light-emitting element includes one or more inorganic microLEDs that generate and emit infrared output light to propagate out-of-plane away from the optical element toward an eye or face of the user wearing the optical assembly. Each light-emitting element of the set is sufficiently small in at least one transverse dimension, and the light-emitting elements occupy a sufficiently small fraction of an areal extent of the set, so as to enable visual observation of a scene, by the user wearing the optical assembly, through the optical element along the sight line of the user, the sight line passing through the set of light-emitting elements.
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