A method for pairing of shutter glasses (411-414) with a remote control unit (RCU) (461-464, 272-273) for use with a display device (220, 230) configured to display a plurality of video streams by time interleaving the frames of the video streams and sending synchronization signal to shutter glasses. The method comprises the steps of: generating at least one synchronization signal (911, 912; 921, 922; 913, 923) for the shutter glasses (411-414); receiving an IR signal (331B) from the RCU (461-464, 272-273); comparing the temporal correspondence of the received IR signal (331B) with the generated at least one synchronization signal (911, 912; 921, 922; 913, 923); and in case a temporal correspondence is found, pairing the RCU (461-464, 272-273) with the shutter glasses (411-414) for which the correspondent synchronization signal (911, 912; 921, 922; 913, 923) was found.

A method for controlling content rendering by a multi-view, directionally dependent display includes defining a first display as a first pixel of a pixelated array of the multi-view display, the first display associated with a first viewing angle relative to a first axis; and defining a second display as a second pixel of the pixelated array, the second display. The method includes controlling chromatic properties of the first pixel by applying a filter based on a rendering of first content to be displayed. The method also includes controlling chromatic properties of the second pixel by applying a filter based on a rendering of second content to be displayed; and controlling points of incidence of light from the first and second pixel relative to an optical multiplexer thereby changing the directionality of the multi-view, directionally dependent display.

A method includes determining one or more controlled viewpoints of a multi-user display which includes a pixelated array and a directional multiplexer, and for each viewpoint of the one or more controlled viewpoints, determining first content to be displayed to the controlled viewpoint according to a visibility criterion. The method further includes, for each viewpoint of the one or more controlled viewpoints, determining a first subset of pixels of the pixelated array whose visibility from the controlled viewpoint satisfies the visibility criterion, and rendering the first content to be displayed on the first subset of pixels of the pixelated array.

A privacy display comprises a luminance-privacy arrangement and a contrast-privacy arrangement. In a privacy mode of operation, ambient light levels are detected and a visual security level is calculated. At and above a visual security level threshold the luminance-privacy arrangement is operable and below the threshold both the luminance-privacy and contrast-privacy arrangements are operable. Image quality for on-axis users is optimised and high levels of visual security are achieved for off-axis snoopers over a wide range of display illuminance conditions.

A privacy display comprises a liquid crystal spatial light modulator, a switchable retarder and a passive compensation retarder arranged between a pair of polarisers. In a privacy mode of operation, on-axis light from the spatial light modulator is directed without change of image contrast, whereas off-axis light has reduced contrast to reduce the visibility of the display to off-axis snoopers over a wide polar angular range. In a wide angle mode of operation, the retardance of the switchable retarder is adjusted so that off-axis contrast is substantially unmodified.

A method of rendering content for display on a multi-view display includes assigning a first display to a first pixel of a pixelated array, with a plurality of pixels periodically spaced along a first axis, the first display associated with a first viewing angle relative to the first axis. The method includes assigning a second display to a second pixel of the pixelated array, display associated with a second viewing angle relative to the first axis. The method further includes controlling a filter value of the first pixel based on a rendering of first content for display, and controlling a filter value of the second pixel based on a rendering of second content for display. The first viewing angle belongs to a first range of viewing angles of an optical multiplexer disposed in front of the pixelated array.

A method, apparatus, system, and computer program product for displaying information. A display system comprises a display device with pixels, a lenticular lens system, a sensor system, and a controller. The lenticular lens system is located on the pixels in the display device. The sensor system is positioned to detect a position of eyes of an authorized user with respect to the display device. The controller determines an authorized viewing angle of each lenticular lens to the eyes of the authorized user in the lenticular lens system using the position of the eyes of the authorized user and turns on a set of the pixels such that the authorized user sees information at the authorized viewing angle.

A display-control apparatus and method for position-based control of display of a video on a display screen are disclosed. Based on retrieval of the video in which each image frame is embedded in one of a plurality of view angles with respect to a reference axis, the display-control apparatus may control display of the video on the display screen. The display controller may control display of the retrieved video on the display screen. The display screen may be viewable from different view positions of a defined area. Further, the display of the retrieved video on the display screen may be controlled such that a first sequence of image frames associated with a first view angle of the plurality of view angles may be viewable through a first type of wearable glasses from a first view position of the different view positions.

Embodiments allow one or more viewers of a display to see images. The images viewed by the glasses may be based on the orientation of the glasses, so that the images correspond to the user's viewpoint. Different images may be presented to left and right eyes for 3D stereoscopic viewing. The position and orientation of the glasses may be tracked by analyzing images from one or more cameras observing the glasses. Glasses may have distinct geometric shapes or features, such as circular lenses, rims, regions around the lenses, patterns, or patterns of recognizable blobs, to facilitate tracking. One or more regions of the glasses may be illuminated by self-contained or reflected light, to facilitate tracking under various ambient lighting conditions. The lenses of the glasses may have selective barriers such as anaglyph filters, polarizing filters, and shutters, to select images from the display. Glasses may also be used as pointing devices to select and manipulate 3D objects.

Disclosed is a light guiding valve apparatus including an imaging directional backlight, an illuminator array and an observer tracking system arranged to achieve control of an array of illuminators which may provide a directional display to an observer over a wide lateral and longitudinal viewing range, wherein the number of optical windows presented to the observer as viewing windows is controlled dependent on the lateral and longitudinal position or speed of an observer.