Meta Platforms Technologies, LLC

Facebook Technologies, LLC

Tamer Elazhary

Nicholas Daniel Trail

Karol Constantine Hatzilias

Yu Shi

Guohua Wei

Nicholas McGee

Michiel Koen Callens

Jacques Gollier

Brian M Wheelwright

Barry David Silverstein

Weichuan Gao

Turhan Karadeniz

Byron Taylor

Yang Zhao

John Jacob Nelson

Yuri Toride

Cameron Maehara Lee

Yujia Huang

Dong Zhang

A display waveguide is configured to direct a first portion of display light to an eye along a first optical path. A disparity waveguide is configured to direct a second portion of the display light to a disparity sense circuit along a second optical path separated from the first optical path.

Waveguide disparity sensing

The disclosed computer-implemented method may include synchronizing a timing scheme between a display and a camera. The method may also include triggering, using a display trigger based on the timing scheme, the display to display a content frame, and triggering, using a capture trigger based on the timing scheme, the camera to capture the displayed content frame. The method may further include building a timeline of frame events for the displayed content frame and the captured content frame, and matching, using the timeline of frame events, the displayed content frame with the captured content frame. Various other methods, systems, and computer-readable media are also disclosed.

Synchronization of disparity camera

A near-eye optical assembly includes a display waveguide and an optical structure. The display waveguide is configured to receive display light and to direct the display light to an eye of a user. The optical structure includes an input coupler, an optical path, and an output coupler. The input coupler is disposed to receive a portion of the display light that propagates through the waveguide. The optical path directs the portion of the display light from the input coupler to an output coupler that is configured to provide the received portion of the display light to a disparity sense circuit.

Active disparity sensing of head mounted display

An optical assembly for a digital projector includes a lens and a field bias optical element. The lens is disposed to receive display light generated by a display and to direct the display light along an optical path. The lens is configured to provide a first field-of-view. The field bias optical element is disposed between the lens and an aperture stop of the optical assembly. The field bias optical element is configured to bias the display light in at least one direction to provide a second field-of-view that is greater than the first field-of-view.

Field bias optical element for digital projector

A displacement sensor measures capacitance between a rotor-stator pair. The displacement sensor includes a plurality of stators coupled to a first object. The plurality of stators is oriented parallel to an axis of motion between the first object and a second object. The displacement sensor further includes a plurality of rotors coupled to the second object. The plurality of rotors is oriented parallel to the axis of motion. Each rotor of the plurality of rotors is aligned with and configured to receive a corresponding stator of the plurality of stators to create a respective rotor-stator pair. Capacitance between the rotor-stator pairs change as a function of position of the first object relative to the second object along the axis of motion. An amount of displacement of the first object relative to the second object is determined based in part on the capacitance values.

Electromechanical displacement sensor

A self-calibrating display can detect and compensate for binocular disparity or other visual imperfection of the display. The display includes a pair of projection units for projecting test light carrying test images through waveguides, which are normally used to carry images to left and right eyes of a user. A detection unit detects the test light propagated through the waveguides, and extracts the test images. Position of reference features in the detected test images may be used to determine binocular disparity, and luminance and color distribution across the test images may be used to determine the illumination and color uniformity of the images displayed to the user. After the visual defects have been detected, they may be reduced or compensated for by pre-emphasizing or shifting images to be displayed to the left and right eyes of the user.

Self-testing display device

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Redmond, WA, United States of America

Tamer Elazhary