Abstract: A head-mounted display including a body, a base and two lenses is provided. The base is disposed at the body, wherein the base has two assembly portions and each assembly portion has a base center. The two lenses are respectively rotatably disposed at the two assembly portions, wherein each lens has a lens center and the lens center of each lens is shifted with respect to the base center of the corresponding assembly portion. In a first state, a first distance is maintained between the two lens centers, and the two lens centers are located between the two base centers. In a second state, a second distance greater than the first distance is maintained between the two lens centers, and the two base centers are located between the two lens centers.

Abstract: A head-mounted display includes a host, two installing bases, two connection elements and a head belt. The host has two installing grooves and two opposite sidewalls, and the two installing grooves respectively penetrate through the two sidewalls. The two installing bases are disposed in the host, wherein each installing base has an abutting portion and an installing portion connected to each other. The abutting portion of each installing base abuts against an inner edge of the corresponding sidewall, and the installing portion of each installing base is exposed outside of the host through the corresponding installing groove. The two connection elements are respectively installed onto the two installing portions of the two installing bases. The head belt has two opposite connection portions, and the two connection portions are respectively connected to the two connection elements.

Abstract: A virtual reality positioning device including a casing, a plurality of lenses, and a plurality of optical positioning components is provided. The casing has a plurality of holes. The lenses are installed in the holes, respectively, where a field angle of each of the lenses is greater than or equal to 120 degrees and less than or equal to 160 degrees, and the lenses include convex lenses or Fresnel lenses. The optical positioning components are installed in the casing and aligned to the lenses, respectively. In addition, a virtual reality positioning system and manufacturing method of a virtual reality positioning device are provided.

Abstract: A head mount display including two display units respectively disposed in front of eyes of a user is provided. Each of the display units includes a display device, a Fresnel lens, and a plurality of moth eye structures. The Fresnel lens is disposed between the display device and one of the eyes of the user. The plurality of moth eye structures are located on at least one surface between the display device and the one of the eyes of the user.

Abstract: A head-mounted display includes a head belt, a frame, a first locking element, a display assembly and a second locking element. The frame is connected to the head belt. The first locking element is disposed at the peripheral of the frame and includes a first locking portion and an unlocking portion adjacent to each other. The second locking element is disposed at the peripheral of the display assembly and includes a second locking portion. The display assembly is fixed to the frame by means of the second locking portion of the second locking element being locked to the first locking portion of the first locking element. The second locking portion is aligned with the unlocking portion, and the locking relation between the second locking portion of the second locking element and the first locking portion of the first locking element is released by the operation of the unlocking portion.

Abstract: An eye tracking device including an optical waveguide component, a light source module, and an eye tracking module is provided. The optical waveguide component has a light-entrance surface and a light-exit surface connecting the light-entrance surface. The light-exit surface has a plurality of micro-structures directly formed on the light-exit surface. The light source module is disposed next to the light-entrance surface and adapted to provide a light beam. The light beam enters the optical waveguide component through the light-entrance surface, and the light beam is emitted from the optical waveguide component through the micro-structures and is transmitted to an eye. The eye tracking module receives a portion of the light beam reflected by the eye and determines a location of the eye based on the portion of the light beam reflected by the eye. A head mounted display is also provided.

Abstract: A head-mounted display apparatus and an acoustic device disposed in the head-mounted display apparatus are provided. The acoustic device includes a speaker, a resonance box, and a waveguide. The resonance box is connected to the speaker. The waveguide is connected to the resonance box. The volume of the waveguide is greater than twice the volume of the speaker, and the length of the waveguide is greater than 5 times the thickness of the speaker.

Abstract: The disclosure provides an augmented reality (AR) device, a notebook, and smart glasses. The AR device includes a laser source, a spatial light modulator (SLM), and a hologram optical element (HOE). The laser source provides a coherent laser ray. The SLM provides a diffraction pattern solely corresponding to the coherent laser ray. When the SLM receives the coherent laser ray, the diffraction pattern diffracts the coherent laser ray as a hologram in response to the coherent laser ray. The HOE provides a concave mirror effect merely in response to a wavelength of the coherent laser ray, wherein the HOE receives the hologram and magnifies the hologram as a stereoscopic virtual image.

Abstract: An eye tracker includes a lens, a beam splitter, a structured light source and an image capturing element. The beam splitter is disposed at one side of the lens. The structured light source and the image capturing element are disposed between the lens and the beam splitter. The structured light source is configured to emit a first light and project to the beam splitter. The first light is reflected to the lens from the beam splitter and passes through the lens to project to an eye. The first light is reflected from the eye to form a second light. The second light passes through the lens and projects to the beam splitter, and is reflected to the image capturing element from the beam splitter. A display is also provided.

Abstract: A head-mounted display including a body, a bearing base, a separation plate, a knob, a guiding element, a first gear, a second gear and a head belt set is provided. The separation plate is fixed inside the bearing base. The knob is pivoted to the bearing base and located outside the bearing base. The guiding element is pivoted to the bearing base and located inside the bearing base, and is configured to be driven by the knob to rotate. The guiding element includes a shaft portion passing through the bearing base and the separation plate. The first gear and the second gear are sleeved on the shaft portion, and are separated from each other by the separation plate. The head belt set connects the body and the bearing base. The head belt set includes an auxiliary head belt, a first side head belt and a second side head belt.

Abstract: A head-mounted display includes a body, a bearing base, a knob, a guiding element, and a head belt set. The knob is pivoted to the bearing base and located outside the bearing base. The guiding element is pivoted to the bearing base and located inside the bearing base and is configured to be driven by the knob to rotate. The guiding element includes a first gear and a second gear. The head belt set connects the body and the bearing base. The head belt set includes a first side head belt, a second side head belt, and an auxiliary head belt. The first gear is configured to drive the first side head belt and the second side head belt to move. The second gear is configured to drive the auxiliary head belt to move.

Abstract: A head-mounted display including a body, a base and two lenses is provided. The base is disposed at the base, wherein the base has two assembly portions and each assembly portion has a base center. The two lenses are respectively rotatably disposed at the two assembly portions, wherein each lens has a lens center and the lens center of each lens is shifted with respect to the base center of the corresponding assembly portion. In a first state, a first distance is maintained between the two lens centers, and the two lens centers are located between the two base centers. In a second state, a second distance greater than the first distance is maintained between the two lens centers, and the two base centers are located between the two lens centers.

Abstract: A head-mounted display including a body, a bearing base, a separation plate, a knob, a guiding element, a first gear, a second gear and a head belt set is provided. The separation plate is fixed inside the bearing base. The knob is pivoted to the bearing base and located outside the bearing base. The guiding element is pivoted to the bearing base and located inside the bearing base, and is configured to be driven by the knob to rotate. The guiding element includes a shaft portion passing through the bearing base and the separation plate. The first gear and the second gear are sleeved on the shaft portion, and are separated from each other by the separation plate. The head belt set connects the body and the bearing base. The head belt set includes an auxiliary head belt, a first side head belt and a second side head belt.

Abstract: A head-mounted display includes a body, a bearing base, a knob, a guiding element, and a head belt set. The knob is pivoted to the bearing base and located outside the bearing base. The guiding element is pivoted to the bearing base and located inside the bearing base and is configured to be driven by the knob to rotate. The guiding element includes a first gear and a second gear. The head belt set connects the body and the bearing base. The head belt set includes a first side head belt, a second side head belt, and an auxiliary head belt. The first gear is configured to drive the first side head belt and the second side head belt to move. The second gear is configured to drive the auxiliary head belt to move.

Abstract: A head-mounted display includes a host, two installing bases, two connection elements and a head belt. The host has two installing grooves and two opposite sidewalls, and the two installing grooves respectively penetrate through the two sidewalls. The two installing bases are disposed in the host, wherein each installing base has an abutting portion and an installing portion connected to each other. The abutting portion of each installing base abuts against an inner edge of the corresponding sidewall, and the installing portion of each installing base is exposed outside of the host through the corresponding installing groove. The two connection elements are respectively installed onto the two installing portions of the two installing bases. The head belt has two opposite connection portions, and the two connection portions are respectively connected to the two connection elements.

Abstract: A head-mounted display includes a head belt, a frame, a first locking element, a display assembly and a second locking element. The frame is connected to the head belt. The first locking element is disposed at the peripheral of the frame and includes a first locking portion and an unlocking portion adjacent to each other. The second locking element is disposed at the peripheral of the display assembly and includes a second locking portion. The display assembly is fixed to the frame by means of the second locking portion of the second locking element being locked to the first locking portion of the first locking element. The second locking portion is aligned with the unlocking portion, and the locking relation between the second locking portion of the second locking element and the first locking portion of the first locking element is released by the operation of the unlocking portion.