Abstract: Multiple head-mounted devices and/or other electronic devices can operate in concert to provide multiple users with shared experiences and content enjoyment. Such operations can be facilitated by a connection between multiple head-mounted devices and/or other electronic devices to allow different users to receive content. Such a connection can be made possible by a connector that directly and physically connects head-mounted devices and/or other electronic devices to each other and transmits signals there between. By providing a physical connection, the signals can be efficiently transmitted even when other types of connections (e.g., wireless) are not available.

Abstract: A head-mounted device may include optical assemblies for presenting images to a user. Motors may be used to adjust the spacing between the optical assemblies to accommodate different interpupillary distances. The head-mounted device may have a housing that receives a custom-fit removable light seal with vision correction lenses. A sensor or wireless transceiver in the housing may receive interpupillary distance information from the light seal. Based on this information, the motors may adjust the optical assemblies so that the optical assemblies are spaced apart by an amount that matches the interpupillary distance associated with the user of the custom-fit removable light seal.

Abstract: A system such as a head-mounted device may have left and right displays for displaying images. The images may be presented to left and right eye boxes through left and right fixed (non-removable) lenses and corresponding left and right removable vision correction lenses. The left and right fixed lenses may be supported by left and right fixed lens supports to which the left and right displays are mounted, respectively. To removably attach the vision correction lenses to the fixed lenses, the fixed lens supports and vision correction lenses may be provided with bayonet mounts. The bayonet mounts may have push-and-turn structures such as pins that mate with corresponding slots.

Abstract: A head-mounted device may have a head-mounted housing. The head-mounted housing may have rear-facing displays that display images for a user. The images are viewable from eye boxes while the head-mounted device is being worn by the user. The displays may be mounted in left and right optical modules that have respective left and right lenses. A positioning system may be used to adjust the spacing between the left and right optical modules to accommodate different interpupillary distances. An adjustable heat extraction system may be provided that includes fans configured to force air between airflow inlets and outlets past heat sinks. The heat sinks may have fins that are adjusted in orientation and/or that are otherwise adjusted based on changes in optical module spacing. The airflow inlets and/or outlets may have adjustable louvers or other movable members that allow these ports to be fully opened, fully closed, or partly closed.

Abstract: An optical module for a head-mounted device is configured to present content to a user. The optical module includes an optical module housing assembly, a display assembly, and an eye camera. The optical module housing assembly has a first end and a second end. The lens is connected to the optical module housing assembly and positioned at the first end of the optical module housing assembly. The display assembly is connected to the optical module housing assembly and is positioned at the second end of the optical module housing assembly. The display assembly is configured to cause the content to be displayed to the user through the lens. The eye camera is connected to the optical module housing assembly and is positioned at the second end of the optical module housing assembly. The eye camera is configured to obtain images through the lens.

Abstract: A head-mounted device may have optical modules that present images to the user's left and right eyes. The optical modules may move with respect to each other to accommodate different user interpupillary distances. Each optical module may have a lens barrel, a display coupled to the lens barrel that generates an image, and a lens mounted to the lens barrel through which the image is viewable from an eye box. The lens may be a multi-element lens formed from molded lens elements such as molded polymer lens elements. A lens element may be provided with protrusions that form lens tabs. The lens tabs may have coplanar lens tab surfaces that mate with corresponding coplanar mounting surfaces in the lens barrel. Alignment marks may be formed on the protrusions and/or other portions of the lens.

Abstract: A head-mounted device may have a head-mounted housing. The head-mounted housing may have rear-facing displays that display images for a user. The images are viewable from eye boxes while the head-mounted device is being worn by the user. The displays may be mounted in left and right optical modules that have respective left and right lenses. A positioning system may be used to adjust the spacing between the left and right optical modules to accommodate different interpupillary distances. An adjustable heat extraction system may be provided that includes fans configured to force air between airflow inlets and outlets past heat sinks. The heat sinks may have fins that are adjusted in orientation and/or that are otherwise adjusted based on changes in optical module spacing. The airflow inlets and/or outlets may have adjustable louvers or other movable members that allow these ports to be fully opened, fully closed, or partly closed.

Abstract: 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 head-mounted support structures may have one or more lens barrels or other support members. Each lens may have an optical surface and a side surface. Adhesive may be used to attach the lenses to the head-mounted support structures. A first portion of the adhesive may bond each lens to a first respective portion of a support member and a second portion of the adhesive may bond each lens to a second respective portion of the support member. The adhesive may be a non-silicone adhesive that fractures in bulk rather than failing at interfaces with the lens and support member. The elastic modulus of the adhesive may help avoid cracking and plastic deformation during drop events.

Abstract: An optical module for a head-mounted device is configured to present content to a user. The optical module includes an optical module housing assembly, a display assembly, and an eye camera. The optical module housing assembly has a first end and a second end. The lens is connected to the optical module housing assembly and positioned at the first end of the optical module housing assembly. The display assembly is connected to the optical module housing assembly and is positioned at the second end of the optical module housing assembly. The display assembly is configured to cause the content to be displayed to the user through the lens. The eye camera is connected to the optical module housing assembly and is positioned at the second end of the optical module housing assembly. The eye camera is configured to obtain images through the lens.

Abstract: A head-mounted device may have a head-mounted housing. The head-mounted housing may have rear-facing displays that display images for a user. The images are viewable from eye boxes while the head-mounted device is being worn by the user. A publicly viewable front-facing display may be mounted on a front face of the head-mounted housing. A display cover layer may overlap a pixel array associated with the front-facing display. An inactive border area of the display cover layer may overlap optical components. Shutter systems may be provided between the display cover layer and the optical components to selectively block light. Actuators may move shutter members or other movable members to cover and uncover the optical components. A removable cover may be used to protect the display cover layer and may have portions in different areas that have different optical properties.

Abstract: A head-mounted display includes a display unit, a head support, and cameras. The display unit includes a display for outputting graphical content. The head support is coupled to the display unit for engaging a head of a user to support the display unit with the display in front of an eye of the user. The cameras are each coupled to one of the display unit or the head support. The cameras have camera fields of view that overlap horizontally to cooperatively provide the head-mounted display with a head-mounted display field of view of 360 degrees horizontal.

Abstract: A head-mountable device can include display elements and/or cameras that can be calibrated for accurate recording and visual output. Whereas some aspects of a head-mountable device can be calibrated at the time of production, usage and wear of the head-mountable device can result in certain components becoming misaligned. A case or other reference can be used to calibrate the cameras of the head-mountable device to ensure that the captured images are recorded in a target alignment. The case can be operated with the head-mountable device to calibrate the display elements of the head-mountable device to ensure that the images are output in a target alignment. Such calibration can include consideration of any lenses installed in front of the display elements.

Abstract: An electronic device such as a head mounted device may have an inner display that displays an image for a user through lenses. Head-mounted support structures may be used to support the display and lenses. One or more external displays may be publicly viewable while the head-mounted device is being worn. The head-mounted support structures may have a front face on which an external display is mounted. One or more finger sensors that are configured to detect touch input, force input, and/or other input from an external object such as a user's finger may be included in the head-mounted device. A finger sensor may have an elongated shape that runs along a peripheral edge of an external display on the front face. Finger sensors may also be located on other portions of the support structures.

Abstract: A head-mounted device may have a head-mounted housing. The head-mounted housing may have rear-facing displays that display images for a user. The images are viewable from eye boxes while the head-mounted device is being worn by the user. A publicly viewable front-facing display may be mounted on a front face of the head-mounted housing. A display cover layer may overlap a pixel array associated with the front-facing display. An inactive border area of the display cover layer may overlap optical components. Shutter systems may be provided between the display cover layer and the optical components to selectively block light. Actuators may move shutter members or other movable members to cover and uncover the optical components. A removable cover may be used to protect the display cover layer and may have portions in different areas that have different optical properties.

Abstract: An electronic device such as a head mounted device may have an inner display that displays an image for a user through lenses. Head-mounted support structures may be used to support the display and lenses. One or more external displays may be publically viewable while the head-mounted device is being worn. The head-mounted support structures may have a front face on which an external display is mounted. One or more finger sensors that are configured to detect touch input, force input, and/or other input from an external object such as a user's finger may be included in the head-mounted device. A finger sensor may have an elongated shape that runs along a peripheral edge of an external display on the front face. Finger sensors may also be located on other portions of the support structures.

Abstract: Different users of head-mountable devices have different needs for vision correction. A system can be provided to determine the corrective lenses that are most appropriate for a given user. A dispenser can contain a variety of different lenses that provide different types of vision correction. The dispenser can provide an appropriate one of the lenses, and a user can use the lens with a head-mountable device during a sampling session. During the sampling session, the user can verify that the lens is satisfactory.

Abstract: A head-mountable device can include display elements and/or cameras that can be calibrated for accurate recording and visual output. Whereas some aspects of a head-mountable device can be calibrated at the time of production, usage and wear of the head-mountable device can result in certain components becoming misaligned. A case or other reference can be used to calibrate the cameras of the head-mountable device to ensure that the captured images are recorded in a target alignment. The case can be operated with the head-mountable device to calibrate the display elements of the head-mountable device to ensure that the images are output in a target alignment. Such calibration can include consideration of any lenses installed in front of the display elements.

Abstract: Multiple head-mounted devices and/or other electronic devices can operate in concert to provide multiple users with shared experiences and content enjoyment. Such operations can be facilitated by a connection between multiple head-mounted devices and/or other electronic devices to allow different users to receive content. Such a connection can be made possible by a connector that directly and physically connects head-mounted devices and/or other electronic devices to each other and transmits signals there between. By providing a physical connection, the signals can be efficiently transmitted even when other types of connections (e.g.

Abstract: A head-mountable device can include modules that provide fit adjustment capabilities when assembled together. By providing a head-mountable device with modular features, certain modules can provide fit adjustment capabilities without requiring other modules to be custom designed or available in a wide variety of sizes and/or shapes. The head-mountable device and/or other electronic devices can be operated to guide a user to select the optimal light seal module for use with an HMD module. For example, the head-mountable device or another device can include sensors for detecting features of the user's face, forces distributed on the face when worn, and/or entry of light from an external environment.

Abstract: 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.