A method performed by an electronic device for requesting tiles relating to a viewport of an ongoing omnidirectional video stream is provided. The ongoing omnidirectional video stream is provided by a server to be displayed to a user of the electronic device. The electronic device predicts for an impending time period, a future head gaze of the user in relation to a current head gaze of the user, based on: A current head gaze relative to a position of shoulders of the user, a limitation of the head gaze of the user bounded by the shoulders position of the user, and a current eye gaze and eye movements of the user. The electronic device then sends a request to the server. The request requests tiles relating to the viewport for the impending time period, selected based on the predicted future head gaze of the user.

A multi-viewpoint 3D display screen is provided, comprising: a display panel, having a plurality of composite pixels, wherein each composite pixel in the plurality of composite pixels comprises a plurality of composite subpixels, and each composite subpixel in the plurality of composite subpixels comprises a plurality of subpixels arranged in array; and a plurality of spherical gratings, covering the plurality of composite subpixels. The multi-viewpoint 3D display screen can play a 3D effect for users at different viewing distances, and achieves high-quality 3D quality. A multi-viewpoint 3D display device is also provided.

A multi-viewpoint 3D display screen is provided, comprising: a display panel, having a plurality of composite pixels, wherein each composite pixel in the plurality of composite pixels comprises a plurality of composite subpixels, and each composite subpixel in the plurality of composite subpixels comprises a plurality of subpixels arranged in array; and a plurality of spherical gratings, covering the plurality of composite subpixels. The multi-viewpoint 3D display screen can play a 3D effect for users at different viewing distances, and achieves high-quality 3D quality. A multi-viewpoint 3D display device is also provided.

A 3D display control system and method are provided. The system includes: a display module, including a plurality of pixel units; an eye position detection device, configured to detect first position moving information and second position moving information; and a lens plate, located at a light emergent side of the display module, and configured to generate a plurality of first lens equivalent units and a plurality of second lens equivalent units, wherein at least one pixel unit directly below each first lens equivalent unit forms a first pixel unit group, and each first lens equivalent unit is configured to redirect light from the first pixel unit group directly therebelow toward a first position.

A 3D display control system and method are provided. The system includes: a display module, including a plurality of pixel units; an eye position detection device, configured to detect first position moving information and second position moving information; and a lens plate, located at a light emergent side of the display module, and configured to generate a plurality of first lens equivalent units and a plurality of second lens equivalent units, wherein at least one pixel unit directly below each first lens equivalent unit forms a first pixel unit group, and each first lens equivalent unit is configured to redirect light from the first pixel unit group directly therebelow toward a first position.

A display device has a display, operable to generate a real image, and an optical system, comprising one or more lenslets, arranged to generate a virtual sub-image from a partial real image on the display, by each lenslet projecting light from the display to an eye position. The sub-images combine to form a virtual image viewable from the eye position. At least one lenslet is symmetric with respect to a plane, and the display surface is cylindrical with its axis perpendicular to that plane.

A head mounted display system with video-see-through (VST) is taught. The system and method process video images captured by at least two forward facing video cameras mounted to the headset to produce generated images whose viewpoints correspond to the viewpoint of the user if the user was not wearing the display system. By generating VST images which have viewpoints corresponding to the user's viewpoint, errors in sizing, distances and positions of objects in the VST images are prevented.

An eye positioning apparatus is provided, comprising: an eye positioner, comprising a first black-and-white camera configured to shoot first black-and-white images and a second black-and-white camera configured to shoot second black-and-white images; and an eye positioning image processor, configured to identify presence of eyes based on at least one of the first black-and-white images and the second black-and-white images and determine eye space positions based on the eyes identified in the first black-and-white images and the second black-and-white images. The apparatus can determine the eye space positions of a user at high accuracy, thereby improving 3D display quality. An eye positioning method, a 3D display device and method, a computer-readable storage medium, and a computer program product are also provided.

An eye positioning apparatus is provided, comprising: an eye positioner, comprising a first black-and-white camera configured to shoot first black-and-white images and a second black-and-white camera configured to shoot second black-and-white images; and an eye positioning image processor, configured to identify presence of eyes based on at least one of the first black-and-white images and the second black-and-white images and determine eye space positions based on the eyes identified in the first black-and-white images and the second black-and-white images. The apparatus can determine the eye space positions of a user at high accuracy, thereby improving 3D display quality. An eye positioning method, a 3D display device and method, a computer-readable storage medium, and a computer program product are also provided.

Provided is a method for realizing 3D image display, comprising: detecting a posture change of a 3D display device, wherein the 3D display device comprises a multi-viewpoint 3D display screen, the multi-viewpoint 3D display screen comprises a plurality of composite pixels and a plurality of spherical gratings covering the plurality of composite pixels, each composite pixel of the plurality of composite pixels comprises a plurality of composite subpixels, and each composite subpixel of the plurality of composite subpixels comprises a plurality of subpixels corresponding to a plurality of viewpoints; and when detecting the posture change of the 3D display device, adjusting a display orientation of a displayed 3D image so that the 3D image is kept in an initial display orientation before the posture change of the 3D display device. A 3D display device, a computer-readable storage medium, and a computer program product are further provided.