A display device includes: a first closed-bottomed lens tube including a first display part on the closed bottom for displaying a first image; a second closed-bottomed lens tube including a second display part on the closed bottom for displaying a second image; and an adjustment mechanism that couples the first lens tube and the second lens tube and is capable of adjusting a distance between the first lens tube and the second lens tube. The adjustment mechanism includes an operable part that adjusts the distance between the first lens tube and the second lens tube.

A head-mounted, near-eye display system comprises a stack of waveguides having integral spacers separating the waveguides. The waveguides may each include diffractive optical elements that are formed simultaneously with the spacers by imprinting or casting. The spacers are disposed on one or more major surfaces of the waveguides and define a distance between immediately adjacent waveguides. Adjacent waveguides may be bonded using adhesives on the spacers. The spacers may fit within indentations of overlying waveguides. In some cases, the spacers may form one or more walls of material substantially around a perimeter of an associated waveguide. Vent holes may be provided in the walls to allow gas flow into and out from an interior volume defined by the spacers. Debris trapping structures may be provided between two walls of spacers to trap and prevent debris from entering into the interior volume.

A headup display device may include: a mirror part rotatably supported by a support part; a housing part installed on one side of the mirror part; a driving part installed in the housing part; a spiral gear part rotatably connected to the driving part; and a mirror rotating part connected to the mirror part, and configured to rotate the mirror part as the spiral gear part is rotated.

An optical module according to the present disclosure includes a display element, a first optical member, a second optical member, a third optical member, and an adhesive joints the first optical member and the second optical member. A first optical member includes a first positioning portion that performs a positioning with respect to a second optical member and the second optical member includes a second positioning portion that performs a positioning with respect to the first optical member.

A head-mounted device may have a head-mounted housing and optical components supported by the head-mounted housing. The optical components may include cameras, movable optical modules, and other components. Each optical module may include a display that displays an image and a lens that provides the image to a corresponding eye box. Optical self-mixing sensors may be included in the optical modules and other portions of the head-mounted device to measure changes in optical component position. In response to detecting a change in optical component position, actuators in the device may be adjusted to move the optical components or other action may be taken to compensate for the change.

A wearable device for augmented media content experiences can be formed with a mountable physical structure that has removably mountable positions and component devices that are removably mounted through the removably mountable positions. The component devices can be specifically selected based on a specific type of content consumption environment in which the wearable device is to operate. The mountable physical structure may be subject to a device washing process to which the component devices are not subject to, after the wearable device including the mountable physical structure and the component devices is used by a viewer in a content consumption session in the specific type of content consumption environment, so long as the component devices are subsequently removed from the mountable physical structure.

A technique for detecting a velocity state of a device includes generating multiple phase measurements for each of multiple packets emitted by the device and monitoring differences between phase measurements made for different packets. The technique further includes asserting a particular velocity state of the device based on a condition of the monitored differences.

A virtual image display system includes an image data producing unit, an image display, and an optical system. The image data producing unit produces, based on image data of a rendering target and position information about a display position of the target, image data to display a virtual image of the target. The image display displays, on a display screen, an image based on the image data to display the virtual image. The display screen is arranged to be tilted with respect to an optical path leading from the display screen to the optical system. The image data of the rendering target includes first image data of a stereoscopic rendering target. The image data producing unit produces, based on the first image data and position information about a display position of the stereoscopic rendering target, second image data to make the user view the stereoscopic rendering target stereoscopically.

A head-mounted display may include a display system and a lens system in a housing. The head-mounted display may include control circuitry that operates the head-mounted display in an active use mode and a protected mode. In the protected mode, the display system may be protected from collisions with the lens system. Placing the head-mounted display in the protected mode may include using an actuator to increase the distance between the display system and the lens system, may include injecting fluid between the display system and the lens system, and/or may include deploying a protective layer between the display system and the lens system. The control circuitry may determine whether to operate the head-mounted display in protected mode or active use mode based on sensor data, on/off status information, location information, and/or other information.

Provided is a head-up display apparatus for a vehicle. The apparatus includes combiner assembly which includes a combiner exposed outside a dashboard or hidden inside the dashboard through a slot formed in the dashboard, a driver which provides a driving force to the combiner assembly, and a slot opening/closing device which opens or closes the slot by the driving force of the driver. The slot opening/closing device includes a door which opens or closes the slot, a lever-door link of which one end is connected to the door and which rotates about a first rotation axis, and a lever of which one end is connected to the lever-door link, which rotates about a second rotation axis, and to which the combiner assembly is slidably connected.