A head mounted display device and a power management method are provided. The head mounted display device includes a host device and a power input device. The power input device is detachably connected to a power device and an electronic device. The power input device generates a first input signal according to a supply voltage value of the power device, and generates a second input signal according to power supply information of the electronic device. The host device enters a power saving mode or performs a boot-up operation according to the first input signal and the second input signal.

A near-eye display system for pupil expansion based on a diffractive optical element includes: A laser light source or an LED light source; a diffusion sheet, arranged on an emergent light path of the laser light source or the LED light source; a micro-electro-mechanical system (MEMS) scanning mirror, arranged on an emergent light path of the diffusion sheet; a diffractive optical element, arranged on an emergent light path of the MEMS scanning mirror; a collimating lens module, arranged on an emergent light path of the diffractive optical element; a mirror, arranged on an emergent light path of the collimating lens module; and a reflective diffraction structure, arranged on a reflection light path of the mirror such that a human eye sees a superimposed image of a real world and a virtual world.

In a head-mounted display for blocking out an outside world from a user's vision when worn by the user to present a video, an outside world measurement section measures outside world information. A notification information detection section detects whether or not the information measured by the outside world measurement section contains any notification information to be notified to the user. A notification section notifies the user when the notification information detection section detects notification information.

There is provided a head mounted display comprising: an interface unit configured to be connected with a cartridge which stores an execution condition for an unmounting process for the cartridge; and at least one controller configured to perform, when the execution condition is satisfied, the unmounting process for the cartridge while the cartridge is connected to the interface unit.

A method includes separately exposing selected portions of a first rigid substrate and a second rigid substrate to laser radiation, selectively etching the exposed portions of the first rigid substrate and the second rigid substrate using a chemical etchant and bonding the first rigid substrate to the second rigid substrate along a common interface to form a fluidic valve. The fluidic valve may be coupled to a fluidic haptics device, for example, which may be integrated into an artificial reality system.

A head mounted display device and a power management method are provided. The head mounted display device includes a host part and a power input part. The power input part is detachably connected to a power device and an electronic device. The power input part generates a first input signal according to a supply voltage value of the power device, and generates a second input signal according to power supply information of the electronic device. The host part enters a power saving mode or performs a boot-up operation according to the first input signal and the second input signal.

The embodiments of the disclosure provide a method for tracking a movable object, a tracking device, and a method for controlling shooting parameters of a camera. The method includes: determining a first on duration of a camera of the tracking device, wherein the first on duration comprises a starting time and an ending time; determining a second on duration of a plurality of light emitting elements disposed on the movable object by adding a first guard time before the starting time and adding a second guard time after the ending time; turning on the light emitting elements based on the second on duration; and controlling the camera to capture a specific image of the light emitting elements in the first on duration and accordingly tracking the movable object.

A display system comprises a light source assembly, a display assembly, a camera assembly, and a controller. The light source assembly is configured to generate visible light and infrared light. The display assembly is configured to generate image light using the visible light and to generate tracking light using the infrared light. The tracking light and the image light pass through a beam splitter prior to being projected into a local area. The camera assembly is configured to capture one or more images of the local area illuminated with the tracking light. The images are illuminated with the tracking light that passes through the beam splitter prior to be being captured by the camera assembly. The controller is configured to calculate depth information for objects in the local area using the one or more images.

A head-mounted device or other electronic device may emit an alternating-current magnetic field. A wireless controller may have alternating-current magnetometers for monitoring the alternating-current field. The wireless controller may also have an accelerometer for measuring the orientation of the controller relative to the Earth's gravity and a direct-current magnetometer for measuring the orientation of the controller relative to the Earth's magnetic field. The alternating-current magnetometers may be three-coil magnetometers located at different locations in a controller housing. Using data from the alternating-current magnetometers, the direct-current magnetometer, the accelerometer, and/or other sensors, the wireless controller can determine the position and orientation of the wireless controller. This information can be wirelessly transmitted to the head-mounted device to control the head-mounted device.

A head-mounted device may have a head-mounted support structure. Rear-facing displays may present images to eye boxes at the rear of the head-mounted support structure. A forward-facing publicly viewable display may be supported on a front side of the head-mounted support structure facing away from the rear-facing displays. The forward-facing display may have pixels that form an active area in which images are displayed and may have a ring-shaped inactive border area that surrounds the pixels. A cosmetic covering structure such as ring-shaped shroud member may overlap optical components in the inactive border area. The optical components may be received within through-hole openings in the cosmetic covering structure and/or may operate through transparent portions of the cosmetic covering structure.