Provided are a head-mounted display and an image display device. The HMD includes a first ball joint, a second ball joint and an arm member. The first ball joint is provided with a first rod portion and a first sphere portion. The second ball joint is provided with a second rod portion and a second sphere portion. The first rod portion passes through a first hole portion. The second rod portion passes through a second hole portion. A position of a half mirror in a first position of a display casing when the first rod portion is positioned at the center of the first hole portion and the second rod portion is positioned at the center of the second hole portion is farther from the mounting member than a position of the half mirror in a second position of the display casing.

A head mounted display for a user that uses a display screen to produce images. The head mounted display includes a frame. The frame has a pair of lenses. The pair of lenses has their optical centers biased away from their physical centers. The head mounted display includes a strap which attaches to the frame and fits about the user's head to hold the frame to the user's head. A method for viewing images by a user.

Embodiments of this application relate to the technical field of optical design, and disclose a method for adjusting field of view angle applied to a waveguide plate in a near-eye display equipment, the waveguide plate forms a tilt angle relative to horizontal direction of human face, the method firstly acquires refractive index, bottom angle of the waveguide plate and a required field of view angle, then calculates the tilt angle of the waveguide plate according to the refractive index and bottom angle of the waveguide plate and the field of view angle, and finally, adjusts the tilt angle to make sure the near-eye display equipment with the field of view angle; the method disclosed by this application enables the waveguide plate to realize low refractive index and large field of view angle at the same time, and features better imaging, lower cost and better stability.

A wearable electronic device is disclosed. The device can include a support structure and an electronic component disposed in or on the support structure. A heat exchanger element can be thermally coupled with the electronic component, the heat exchanger element comprising a fluid inlet port and a fluid outlet port. A first conduit can be fluidly connected to the fluid inlet port of the heat exchanger, the first conduit configured to convey, to the heat exchanger, liquid at a first temperature. A second conduit can be fluidly connected to the fluid outlet port of the heat exchanger, the second conduit configured to convey, away from the heat exchanger, liquid at a second temperature different from the first temperature.

A screening platform enables comprehensive ocular evaluations. The screening platform includes a harness that is configured to fit a head of a patient and that includes one or more electronic components that are operable to power an interchangeable module, a central processing unit (CPU) with a graphical processing unit (GPU), and the interchangeable module with communication capabilities to external computational devices, multiple display output devices, and several types of input devices from both an operator and a patient at-hand, wherein the interchangeable module is separable from the screening platform.

Eyewear including a multi-layered display having an adhesive bonding the layers together at an offset distance inward from an outer edge of the layers. The display has an image display layer, such as an optical waveguide in one example, and a pair of layers encompassing the image display layer and which may comprise optically transparent substrates, such as glass. A respective adhesive is positioned the offset distance inward from the outer edge of the display layer between the image display layer and each of the pair of layers to reduce stress in the display. Each of the adhesives may be a continuous bead such that there is no adhesive between the pair of layers and the image display layer at the outer edges. In one example, the offset distance may be at least double the thickness of the image display layer to reduce stress in the image display layer.

A head-mounted display (HMD) includes various features that allow for customizing the HMD to different users. The HMD may include an interpupillary distance (IPD) adjustment mechanism that includes a double biasing assembly for smooth, controlled adjustment of the spacing between lens tubes. The HMD may include a field of view (FOV) adjustment mechanism that includes first and second gear assemblies connected via a connecting rod to allow uniform adjustment of the spacing between the lenses and the user's face. The HMD may further include a swappable face gasket, a swappable visor, a removable head strap, and a modular accessory compartment for further customizations to the HMD. The HMD may further include inconspicuous spectrum-transmissive windows that are made with a spectrum-transmissive base material for the HMD housing that is coated with a spectrum-opaque material, and the spectrum-opaque material is selectively removed to create the spectrum-transmissive windows.

The invent discloses a smart wearable device for vision enhancement and a method for realizing stereoscopic vision transposition, comprising a wearable device body, wherein the wearable device body is provided with camera lenses, image sensors, an image information receiving and transmitting unit, image enhancement units, and near-to-eye optical systems; the optical axis and field angle of the near-to-eye optical system are matched with the optical axis and field angle of the camera lens; the image sensor is arranged behind the camera lens; the real scene enters the image sensor through an image imaging device for image acquisition, and through the image enhancement unit, the low-light environment image collected by the smart wearable device in the low-light environment is enhanced and displayed clearly. The invention can ensure the enhancement of the real stereoscopic vision in the dark environment and the interchange of the remote and barrier-free stereoscopic real vision.

Computer-implemented methods of operating an augmented reality device can involve capturing camera images, processing the camera images, and displaying virtual display images. The camera images can be captured automatically using a camera disposed within an augmented reality device worn by a user. The camera images can be processed automatically using a processor located within the augmented reality device. The virtual display images can be displayed automatically to the user within the augmented reality device while the user is looking through the augmented reality device and simultaneously viewing real objects through the augmented reality device. The virtual display images can be based on the processed camera images. Additional steps can include accepting a first user input, storing camera image(s) on a memory located within the augmented reality device based on the first input, accepting a second user input, and displaying stored image(s) to the user based on the second input.

An augmented reality (AR) head-mounted display suitable for use with an endoscope to display the images captured by the endoscope in front of a doctor in an augmented reality manner. The AR head-mounted display utilizes a forehead pad that is raised and tilted at a larger angle to match a rear-head pad that is at the eye level of the wearer and is tilted at a smaller angle. The connection cable of the AR head-mounted display is extending to and clamped on a clip structure of the rear-head pad, and then further extending downward from the back of the wearer. No matter whether the wearer is in a straight-up or head-down position, such head-mount design can always be ergonomically and stably held on the wearer’s head; there will be no loosening nor displacement even if the wearer’s head is lowered for a long time.