A three-dimensional (3D) image rendering method for a heads-up display (HUD) system including a 3D display apparatus and a catadioptric system is provided. The 3D image rendering method includes determining optical images corresponding to both eyes of a user by applying, to each of the positions of the eyes, an optical transformation that is based on an optical characteristic of the catadioptric system, and rendering an image to be displayed on a display panel included in the 3D display apparatus, based on a position relationship between the optical images and the display panel.

A three-dimensional (3D) image rendering method for a heads-up display (HUD) system including a 3D display apparatus and a catadioptric system is provided. The 3D image rendering method includes determining optical images corresponding to both eyes of a user by applying, to each of the positions of the eyes, an optical transformation that is based on an optical characteristic of the catadioptric system, and rendering an image to be displayed on a display panel included in the 3D display apparatus, based on a position relationship between the optical images and the display panel.

A parallax barrier panel including a first substrate, a second substrate opposing the first substrate, a liquid crystal layer between the first substrate and the second substrate, a plurality of first electrodes arranged between the first substrate and the liquid crystal layer, the plurality of first electrodes extending in a first direction, a plurality of second electrodes arranged between the plurality of first electrodes and the liquid crystal layer, the plurality of second electrodes extending in the first direction and arranged alternating with the plurality of first electrodes in a planar view, and an opposing electrode opposing the plurality of first electrodes and the plurality of second electrodes, wherein the second electrode is insulated from the first electrode, and a width of the second electrode in the second direction intersecting the first direction is smaller than a width of the first electrode in the second direction.

A stereoscopic image display device includes: a display panel including a plurality of pixels arranged in a matrix format; and a viewpoint division unit dividing light of a left-eye image and light of a right-eye image displayed by the plurality of dots and transferring the divided light to a plurality of viewpoints corresponding to each dot, wherein the viewpoint division unit includes a plurality of openings and a light blocking unit, and when a horizontal directional width of each of the plurality of openings corresponds to an m number of dots (m is a natural number), a number dots of n adjacent in the horizontal direction displaying the left-eye image and the right-eye image is equal to n=2m+1 or n=2(m+1).

In implementations of trajectory-based viewport prediction for 360-degree videos, a video system obtains trajectories of angles of users who have previously viewed a 360-degree video. The angles are used to determine viewports of the 360-degree video, and may include trajectories for a yaw angle, a pitch angle, and a roll angle of a user recorded as the user views the 360-degree video. The video system clusters the trajectories of angles into trajectory clusters, and for each trajectory cluster determines a trend trajectory. When a new user views the 360-degree video, the video system compares trajectories of angles of the new user to the trend trajectories, and selects trend trajectories for a yaw angle, a pitch angle, and a roll angle for the user. Using the selected trend trajectories, the video system predicts viewports of the 360-degree video for the user for future times.

In implementations of trajectory-based viewport prediction for 360-degree videos, a video system obtains trajectories of angles of users who have previously viewed a 360-degree video. The angles are used to determine viewports of the 360-degree video, and may include trajectories for a yaw angle, a pitch angle, and a roll angle of a user recorded as the user views the 360-degree video. The video system clusters the trajectories of angles into trajectory clusters, and for each trajectory cluster determines a trend trajectory. When a new user views the 360-degree video, the video system compares trajectories of angles of the new user to the trend trajectories, and selects trend trajectories for a yaw angle, a pitch angle, and a roll angle for the user. Using the selected trend trajectories, the video system predicts viewports of the 360-degree video for the user for future times.

The present disclosure provides a grating including: a first substrate including stacked first and second electrode layers each including strip-shaped electrodes with an identical width, strip-shaped electrodes in the first and second electrode layers arranged alternately; a second substrate opposite to the first substrate with a liquid crystal layer therebetween; driving modules for driving the strip-shaped electrodes to form light shading parts and light transmission parts, one light shading part and one adjacent light transmission part defining a grating unit, at least one grating unit defining a grating part, the driving modules arranged in one-to-one correspondence with the grating parts; and a control module for generating driving signals in one-to-one correspondence with the driving modules according to a distance between the human eyes and the grating, thereby changing a width of the grating unit corresponding to a crosstalk position. A 3D display device and a grating driving method are provided.

The present invention relates to a method for displaying an image in a direction towards an observer observing the image from a viewpoint. The method comprises providing a display system including a tracking system for tracking or detecting the position of the observer, a display screen having a plurality of image pixels for displaying the image, a controller for controlling the direction of light emitted from said display screen, and a processing unit for generating a buffer image from a data source. The method further comprises tracking the observer and generating tracking data to the processing unit, generating the buffer image and embedding the tracking data as embedded data in the buffer image, outputting the buffer image to the display screen and displaying the image on the display screen, and reading the embedded data by the controller and directing light from the display screen in a direction towards the viewpoint.

The present invention relates to a method for displaying an image in a direction towards an observer observing the image from a viewpoint. The method comprises providing a display system including a tracking system for tracking or detecting the position of the observer, a display screen having a plurality of image pixels for displaying the image, a controller for controlling the direction of light emitted from said display screen, and a processing unit for generating a buffer image from a data source. The method further comprises tracking the observer and generating tracking data to the processing unit, generating the buffer image and embedding the tracking data as embedded data in the buffer image, outputting the buffer image to the display screen and displaying the image on the display screen, and reading the embedded data by the controller and directing light from the display screen in a direction towards the viewpoint.

According to one embodiment, a display device includes a display portion and a light control controller. Each of the sub-pixels have a first width along a first direction and a second width along a second direction, the second with being n times as large as the first width where n is a natural number of 2 or more. The light control controller extends in an oblique direction different from the first direction and the second direction and being tilted at approximately 45 degrees to the first direction.