Apple Inc.

Brandon E Clarke

John N Border

Victoria C Chan

Nan Zhu

William W Sprague

Cheng Kai Chen

Jeremy C Franklin

Rui Liu

Andreas G Weber

Wey-Jiun Lin

Hyungryul J Choi

Phil M Hobson

Graham Butler Myhre

Edward S Huo

Forrest C Wang

Yury Anatolievich Petrov

Qiong Huang

Paul V Johnson

Jeffrey C Olson

Branko Petljanski

Aleksandr N Polyakov

Christina G Gambacorta

Elijah H Kleeman

Edward Allen Valko

Wei-Liang Hsu

Aditi G Kanhere

A head-mounted display may include a display system and an optical system in a housing. The display system may have displays that produce images. Positioners may be used to move the displays relative to the eye positions of a user's eyes. An adjustable optical system may include tunable lenses such as tunable cylindrical liquid crystal lenses. The displays may be viewed through the lenses when the user's eyes are at the eye positions. A sensor may be incorporated into the head-mounted display to measure refractive errors in the user's eyes. The sensor may include waveguides and volume holograms, and a camera for gathering light that has reflected from the retinas of the user's eyes. Viewing comfort may be enhanced by adjusting display positions relative to the eye positions and/or by adjusting lens settings based on the content being presented on the display and/or measured refractive errors.

Head-mounted display device with vision correction

An electronic device may have a support structure that supports a display and lenses. Each lens may be a reflective lens such as a catadioptric lens that receives polarized image light from the display and provides a corresponding image to an eye box. The display may be an emissive display with pixels that include light-emitting diodes. The light-emitting diodes may be overlapped by a light recycling layer such as a reflective polarizer or cholesteric liquid crystal layer. The light recycling layer recycles emitted light to enhance display efficiency.

Electronic device having emissive display with light recycling

An electronic device such as a head mounted device may have a display that displays an image for a user. Head-mounted support structures may be used to support the display and to support lenses. The image on the display is visible through the lenses from eye boxes. The presence of the user's nose and the presence of opaque lens holder structures presents a risk that some of the image will be obscured by undesired black regions. To reduce or eliminate these black regions, facial illumination may be generated using a light source in the electronic device. The facial illumination may be provided by a light source such as a light-emitting diode die or laser or may be provided by a corner region of the display that contains pixels that do not supply any part of the image.

Display system with facial illumination

A head-mounted device may include a display system and an optical system in a housing. The display system may have displays that produce images. The optical system may have Fresnel lenses through which a user of the head-mounted device may view the images. The Fresnel lenses may have concentric rings with slope facets and draft facets angled parallel to the chief rays. Light scattering in the Fresnel lenses may be reduced by coating the draft facets with opaque masking material and/or by aligning concentric rings of the opaque masking material that are supported on a transparent substrate with the draft facets. A central portion of the Fresnel lens that is free of facets may be enlarged to reduce scattering. The Fresnel lenses may have wedge-shaped cross-sectional profiles and may have outer portions that are thicker than inner portions. Gradient-index material may be used in forming the Fresnel lenses.

Head-mounted display device with Fresnel lenses

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Sunnyvale, CA, United States of America

Brandon E Clarke