A virtual reality training system according to an aspect of the invention may include a floor system having a base of a particular length and width, an object member configured to be detachably installed on the floor system, an input unit configured to assign a first position, which corresponds to the position of an object within a virtual reality space having a length and width smaller than or equal to the length and width of the base of the floor system, and a mapping unit configured to compute and output a second position, for installing the object member on the floor system, computed as a position on the floor system corresponding to the first position within the virtual reality space.

A near-eye display device comprises a pupil-expansion optic, first and second lasers, a drive circuit coupled operatively to the first and second lasers, a beam combiner, a spatial light modulator (SLM), and a computer. The first and second lasers are configured to emit in respective first and second wavelength bands. The beam combiner is configured to geometrically combine emission from the first and second lasers into a collimated beam. The SLM is configured to receive the collimated beam and to direct the emission in spatially modulated form to the pupil-expansion optic. The computer is configured to parse a digital image, trigger the emission from the first and second lasers by causing the drive circuit to drive current through the first and second lasers, and control the SLM such that the spatially modulated form of the emission projects an optical image corresponding to the digital image.

Provided is a head-mounted display apparatus including: a display unit configured to display each of virtual screens that is set to each of a plurality of predetermined focal lengths; a distance-specific image generation unit configured to generate distance-specific display images for displaying, on the virtual screens, a display object representing an object to be displayed present between two focal lengths next to each other of the plurality of focal lengths; and a display controller configured to display each of the generated distance-specific display images on the virtual screen.

Technologies that stimulate the mammalian central nervous system are described. A method includes: (a) causing a pair of glasses to be worn by a user, where the pair of glasses hosts/interacts with a processor, a first light source, a second light source, a first sound source, and a second sound source; (b) causing the processor to read sets of parameters that include information regarding base frequencies, variability, frequency ranges, and time ranges, where the frequency ranges are positively and negatively off the base frequencies; and (c) causing the processor to request the light sources to (i) flash light to visual fields (left/right) of each eye according to selected frequencies for a duration of time and to (ii) pulse sound to the each ear according to selected frequencies for a duration of time such that an audio-visual entrainment (AVE) occurs that causes neuron and the glia to respond dynamically to the AVE. The frequencies are randomly selected from a frequency range and the duration of stimulation time is randomly selected from a time range.

A method is performed at a first device with a non-transitory memory, one or more processors, and a network interface. The method includes storing, in the non-transitory memory, reference data describing at least one reference object. The method includes receiving user data via the network interface at a time after completion of a user session of a user of a second device. The user behavior data includes a user behavior characteristic of the user of the second device at a plurality of times during the user session and respective time stamps indicative of the plurality of times during the user session. The method includes combining, using one or more processors, the user behavior data and the reference data based on the respective time stamps to generate data regarding user behavior during the user session with respect to the at least one reference object.

A display method, an electronic device, and a system for correcting display of images on a head-mounted display device are described. In a method, an electronic device may obtain an inter-pupillary distance (IPD) of a user based on user operations entered by the user based on user interfaces displayed on a head-mounted display device, correct a source image based on the IPD of the user to obtain target images used to be displayed on the head-mounted display device, and send the target images to the head-mounted display device. In this way, the user can comfortably and truly experience a 3D scenario when wearing the head-mounted display device.

One disclosed example provides a method for displaying a hologram via a head-mounted display (HMD) device. The method comprises, via a camera system on the HMD device, acquiring image data capturing a surrounding environment by detecting illumination light output by a projector located on a case for the HMD device. A distance is determined from the HMD device to an object in the surrounding environment based upon the image data. The method further comprises displaying via the HMD device a hologram, the hologram comprising a left-eye image and a right-eye image each having a perspective based upon the distance determined.

Augmented and virtual reality display systems increase viewer comfort by reducing viewer exposure to virtual content that causes undesirable accommodation-vergence mismatches (AVM). The display systems limit displaying content that exceeds an accommodation-vergence mismatch threshold, which may define a volume around the viewer. The volume may be subdivided into two or more zones, including an innermost loss-of-fusion zone (LoF) in which no content is displayed, and one or more outer AVM zones in which the displaying of content may be stopped, or clipped, under certain conditions. For example, content may be clipped if the viewer is verging within an AVM zone and if the content is displayed within the AVM zone for more than a threshold duration. A further possible condition for clipping content is that the user is verging on that content. In addition, the boundaries of the AVM zone and/or the acceptable amount of time that the content is displayed may vary depending upon the type of content being displayed, e.g., whether the content is user-locked content or in-world content.

A switchable optical assembly comprises a switchable waveplate configured to be electrically activated and deactivated to selectively alter the polarization state of light incident thereon. The switchable waveplate comprises first and second surfaces and a liquid crystal layer disposed between the first and second surfaces. The first liquid crystal layer comprises a plurality of liquid crystal molecules. Said first and second surfaces may be curved. Said plurality of liquid crystal molecules may vary in tilt with respect to said first and second surfaces with outward radial distance from an axis through said first and second surfaces and said liquid crystal layer in a plurality of radial directions. The switchable waveplate additionally comprises a first plurality of electrodes to apply an electrical signal across said first liquid crystal layer.

An augmented reality display device including a virtual image display and a controller is provided. The virtual image display is configured to provide a left eye virtual image and a right eye virtual image to a left eye and a right eye of a user, respectively. The controller is electrically connected to the virtual image display, and is configured to command the virtual image display to display a left eye virtual mark and a right eye virtual mark, corresponding to a real mark in space, in the left eye virtual image and the right eye virtual image, respectively, and calculate an interpupillary distance between the left eye and the right eye according to a deviation of the left eye virtual mark with respect to the real mark and a deviation of the right eye virtual mark with respect to the real mark.