Abstract: The disclosure provides an eye tracking method and an eye tracking device. The method includes obtaining a reference interpupillary distance value; taking images of a user of a 3D display, and finding a first eye pixel coordinate corresponding to a first eye of the user and a second eye pixel coordinate corresponding to a second eye of the user in each image; detecting a first and a second eye spatial coordinates of the first and the second eyes, and determining projection coordinates based on the first eye spatial coordinate, the second eye spatial coordinate, and optical parameters of image capturing elements; determining an optimization condition related to the first and second eye spatial coordinates based on the first and second eye pixel coordinates, the projection coordinates, and the reference interpupillary distance value of each image; and optimizing the first and second eye spatial coordinates based on the optimization condition.

Abstract: The disclosure provides a feature point position detection method and an electronic device. The method includes: obtaining a plurality of first relative positions of a plurality of feature points on a specific object relative to a first image capturing element; obtaining a plurality of second relative positions of the plurality of feature points on the specific object relative to a second image capturing element; and in response to determining that the first image capturing element is unreliable, estimating a current three-dimensional position of each feature point based on a historical three-dimensional position and the plurality of second relative positions of each feature point.

Abstract: Augmented reality glasses including a first image source, a second image source and a lens set are provided. The first image source emits a first image beam. The second image source emits a second image beam. The lens set includes a first lens and a second lens and disposed on the path of the image beams. A gap is disposed between the first lens and the second lens. The refractive index of the gap is lower than that of the first lens. The image beams enter the lens set at an incident surface of the lens set, are reflected at a first surface of the first lens, and exit the lens set at an exit surface. The optical path length of the first image beam from the first image source to the eyes is different from that of the second image beam from the second image source to the eyes.

Abstract: An augmented reality display device, which is configured to provide an augmented reality image to an eye of a user, includes a display module and multiple mirror sets. The display module includes a projector and multiple switching elements. The projector provides an original image beam. The switching elements are deposed sequentially on a path of the original image beam. Each of the switching elements reflects or transmits the original image beam. Reflection paths of each ray of the original image beam on the switching elements intersect at one point to generate multiple image beams. The mirror sets are disposed on paths of the image beams. The image beams are reflected at different angles on the mirror sets, and the mirror sets reflect the image beams to the eye.

Abstract: The disclosure provides a feature point position detection method and an electronic device. The method includes: obtaining a plurality of first relative positions of a plurality of feature points on a specific object relative to a first image capturing element; obtaining a plurality of second relative positions of the plurality of feature points on the specific object relative to a second image capturing element; and in response to determining that the first image capturing element is unreliable, estimating a current three-dimensional position of each feature point based on a historical three-dimensional position and the plurality of second relative positions of each feature point.

Abstract: An augmented reality display device, which is configured to provide an augmented reality image to an eye of a user, includes a display module and multiple mirror sets. The display module includes a projector and multiple switching elements. The projector provides an original image beam. The switching elements are deposed sequentially on a path of the original image beam. Each of the switching elements reflects or transmits the original image beam. Reflection paths of each ray of the original image beam on the switching elements intersect at one point to generate multiple image beams. The mirror sets are disposed on paths of the image beams. The image beams are reflected at different angles on the mirror sets, and the mirror sets reflect the image beams to the eye.

Abstract: An augmented reality display device is used to provide an augmented reality image to one eye of a user. The augmented reality display device includes a curved eyepiece, multiple first micromirrors and two first displays. These first micromirrors are disposed on the curved eyepiece. The two first displays are respectively disposed on two opposite sides of the curved eyepiece. Each first display is for emitting a first image beam. These first micromirrors are for imaging two first image beams emitted by the two first displays onto a retina of the eye to form the augmented reality image. Among them, the horizontal field of view formed by these first micromirrors to the eyes falls within the range of 80 degrees to 110 degrees.

Abstract: A pair of augmented reality glasses including a projection device and a waveguide is provided. The projection device is configured to provide a collimated beam. The waveguide has a plurality of free form surfaces. Distances between each free form surface and the projection device are different from each other. The collimated beam progresses to and reflects off these free form surfaces in sequence, and then enters eyes of the user.

Abstract: The disclosure provides an eye tracking method and an eye tracking device. The method includes obtaining a reference interpupillary distance value; taking images of a user of a 3D display, and finding a first eye pixel coordinate corresponding to a first eye of the user and a second eye pixel coordinate corresponding to a second eye of the user in each image; detecting a first and a second eye spatial coordinates of the first and the second eyes, and determining projection coordinates based on the first eye spatial coordinate, the second eye spatial coordinate, and optical parameters of image capturing elements; determining an optimization condition related to the first and second eye spatial coordinates based on the first and second eye pixel coordinates, the projection coordinates, and the reference interpupillary distance value of each image; and optimizing the first and second eye spatial coordinates based on the optimization condition.

Abstract: 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.

Abstract: A head mounted display including two display units is provided. An included angle between the two display units is greater than 0 degrees and less than 180 degrees. Each of the two display units includes a display device, a condenser lens and a prism. The condenser lens overlaps the display device. The prism overlaps the condenser lens and the display device. A material of one of the condenser lens and the prism includes flint glass, and a material of the other of the condenser lens and the prism includes crown glass.

Abstract: Augmented reality glasses including a first image source, a second image source and a lens set are provided. The first image source emits a first image beam. The second image source emits a second image beam. The lens set includes a first lens and a second lens and disposed on the path of the image beams. A gap is disposed between the first lens and the second lens. The refractive index of the gap is lower than that of the first lens. The image beams enter the lens set at an incident surface of the lens set, are reflected at a first surface of the first lens, and exit the lens set at an exit surface. The optical path length of the first image beam from the first image source to the eyes is different from that of the second image beam from the second image source to the eyes.

Abstract: A stereoscopic display device including a display panel and an optical element is provided. The optical element is disposed on a display surface of the display panel. The optical element includes a lenticular lens array. The lenticular lens array includes a plurality of lenticular lenses extending in a first direction. The lenticular lenses are arranged in a second direction. The optical element includes a center line extending in the first direction. The lenticular lenses include a first lenticular lens and a second lenticular lens. The distance between the first lenticular lens and the center line is smaller than the distance between the second lenticular lens and the center line, and the curvature of the first lenticular lens is greater than the curvature of the second lenticular lens.

Abstract: A naked eye stereoscopic display and a control method thereof are provided. The control method of a naked eye stereoscopic display includes the following steps. An effective image width of one eye is obtained. The eye is tracked to obtain an eye movement vector, a movement speed vector and a moving acceleration vector. A correction vector is obtained according to the effective image width, the movement speed vector and the moving acceleration vector. The eye movement vector is corrected according to the correction vector. An image position of a monocular image at several pixels is corrected according to the eye movement vector, which is corrected.

Abstract: Augmented reality eyeglasses having a structured light detecting function and including a laser projector, an eyeglass lens, at least one first diffractive optical element (DOE) film, an invisible light camera and a second DOE film are provided. The laser projector is configured to emit at least one invisible beam and an image beam. The at least one first DOE film is disposed on the eyeglass lens. The first DOE film is configured to diffract the invisible beam into a structured beam. The structured beam is transmitted to an object to be detected, so as to form a light pattern on the object to be detected. The invisible light camera is configured to photograph the light pattern on the object to be detected. The second DOE film is disposed on the eyeglass lens, and is configured to make the image beam travel to an eye.

Abstract: The invention provides smart glasses having expanding eyebox, which includes a projector and at least one beam translation module. The projector provides an image beam, which is polarized. The at least one beam translation module is disposed on a path of the image beam, and includes an adjustable liquid crystal panel and a birefringent crystal plate. The adjustable liquid crystal panel is disposed on the path of the image beam and configured to adjust an amount of phase retardation of the image beam. The birefringent crystal plate is disposed on a path of the image beam from the adjustable liquid crystal panel. After the amount of phase retardation of the image beam is adjusted through the adjustable liquid crystal panel, a translation in a direction parallel to a beam-emitting surface of the birefringent crystal plate occurs on the image beam exited from the birefringent crystal plate.

Abstract: Augmented reality glasses are provided. The augmented reality glasses are adapted to be put on in front of the eyes of a user. The augmented reality glasses include at least one image source and a plurality of reflecting mirrors. The at least one image source is configured to provide at least one image beam to the eyes, and the at least one image beam has a plurality of sub-beams. The plurality of reflecting mirrors are disposed on a path of the at least one image beam to respectively reflect the sub-beams. The at least one image beam has at least one first width before being incident on the reflecting mirrors and has at least one second width after being reflected by the reflecting mirrors. The at least one second width is greater than the at least one first width.

Abstract: A head mounted display including two display units is provided. Each display unit includes a display module and an optical assembly disposed in front of the display module. The display module includes a carrier body and a plurality of light-emitting elements. The carrier body includes a plurality of recesses. Each recess has a bottom surface and a reflective side wall connected to the bottom surface. A plurality of the light-emitting elements are located in the plurality of recesses. Each light-emitting element is disposed on the bottom surface of a corresponding recess. The optical assembly is disposed in front of the display module.

Abstract: Augmented reality eyeglasses having a structured light detecting function and including a laser projector, an eyeglass lens, at least one first diffractive optical element (DOE) film, an invisible light camera and a second DOE film are provided. The laser projector is configured to emit at least one invisible beam and an image beam. The at least one first DOE film is disposed on the eyeglass lens. The first DOE film is configured to diffract the invisible beam into a structured beam. The structured beam is transmitted to an object to be detected, so as to form a light pattern on the object to be detected. The invisible light camera is configured to photograph the light pattern on the object to be detected. The second DOE film is disposed on the eyeglass lens, and is configured to make the image beam travel to an eye.

Abstract: Augmented reality glasses are provided. The augmented reality glasses are adapted to be put on in front of the eyes of a user. The augmented reality glasses include at least one image source and a plurality of reflecting mirrors. The at least one image source is configured to provide at least one image beam to the eyes, and the at least one image beam has a plurality of sub-beams. The plurality of reflecting mirrors are disposed on a path of the at least one image beam to respectively reflect the sub-beams. The at least one image beam has at least one first width before being incident on the reflecting mirrors and has at least one second width after being reflected by the reflecting mirrors. The at least one second width is greater than the at least one first width.