Abstract: A display system which includes a first image display; a second image display; a reflective polarizer disposed between the first image display and the second image display, with the second image display disposed on a viewing side of the display system; and a controller for addressing image data to the first image display and the second image display, wherein the controller, the first image display and second image display are configured to selectively operate in accordance with: a first display function in which the first image display is visible to a viewer through the second image display and the second image display appears substantially transparent to the first image display; a second display function in which the display system appears as a plane mirror to the viewer; and a third display function in which the display system appears as a patterned mirror to the viewer.

Abstract: Two methods are described for calculating the non-periodic display pixel pattern necessary for good viewing properties of a multiple view directional display with a fixed parallax barrier pitch. These methods could also be used to calculate optimum barrier pitch parameters for a display with a re-configurable parallax optic, such as a re-configurable parallax barrier, and a fixed pixel assignment, or to calculate hybrid system parameters in a display where the parallax optic (eg a parallax barrier) and the pixel assignment are both re-configurable. The first method uses a geometrical analysis to calculate a non-integer subpixel repeat unit for interlacing. In this approach interlacing starts at a point determined by the user's head position relative to the display. The non-integer number ensures that the interlace pattern inserts extra pixels where necessary in order to compensate for the user's head position.

Abstract: A multiple view directional display has an image display panel, a parallax optic and a control unit. The control unit is configured to address the image display panel to display first and second images on respective sets of X adjacent columns of pixels or sub-pixels. The parallax optic comprises parallax elements configured to allow a first region of the image display panel having a width of Y adjacent columns of pixels or sub-pixels to be visible to a left eye of a viewer, where Y?3 and X?Y?3, and to allow a second, different region of the image display panel having a width of Y adjacent columns of pixels or sub-pixels to be visible to a right eye of the viewer. Parallax elements of the parallax optic are inclined with respect to columns of pixels or sub-pixels of the image display panel.

Abstract: A switchable imaging device (1) has a first mode of operation in which the device performs an imaging function and a second mode of operation different from the first mode, for example a non-imaging mode. In the first mode of operation the device comprises at least one first region that performs a lensing action and at least one second region that at least partially absorbs light passing through the or each second region. The switchable imaging device (1) may be disposed in path of light through an image display panel (4). This provides a display that may be operable in either a directional display mode such as an autostereoscopic 3D display mode or a 2-D display mode, by controlling the switchable imaging device to be in its first mode or its second mode.

Abstract: A three-dimensional display apparatus includes a display device capable of displaying an image, and a liquid crystal lens disposed so as to overlap the display device. The liquid crystal lens includes an insulating substrate, a first electrode formed extending in a first direction, a second electrode formed substantially parallel to the first electrode, a high resistance portion electrically connecting the first electrode and the second electrode, an opposing substrate, a common electrode, a liquid crystal layer, and a controller. The sheet resistance of the high resistance portion is in 100 G?/sq or less. The controller controls, in one of the modes, the first electrode and the second electrode to be at different potentials.

Abstract: A display system which includes a first image display; a second image display; a reflective polariser disposed between the first image display and the second image display, with the second image display disposed on a viewing side of the display system; and a controller for addressing image data to the first image display and the second image display, wherein the controller, the first image display and second image display are configured to selectively operate in accordance with: a first display function in which the first image display is visible to a viewer through the second image display and the second image display appears substantially transparent to the first image display; a second display function in which the display system appears as a plane mirror to the viewer; and a third display function in which the display system appears as a patterned mirror to the viewer.

Abstract: A switchable imaging device (1) has a first mode of operation in which the device performs an imaging function and a second mode of operation different from the first mode, for example a non-imaging mode. In the first mode of operation the device comprises at least one first region that performs a lensing action and at least one second region that at least partially absorbs light passing through the or each second region. The switchable imaging device (1) may be disposed in path of light through an image display panel (4). This provides a display that may be operable in either a directional display mode such as an autostereoscopic 3D display mode or a 2-D display mode, by controlling the switchable imaging device to be in its first mode or its second mode.

Abstract: A multimedia-based language learning method and system which includes implementing via one or more processors the steps of—receiving an input of multimedia content, where the multimedia content comprises a plurality of component tracks; separating the multimedia content into multimedia sections in which the plurality of component tracks share a same start and end time; retrieving a user model representing a learner's knowledge and/or interest in a foreign language; automatically assigning one or more learner-specific evaluations to the multimedia sections by evaluating one or more of the component tracks based on the user model within each of the multimedia sections; and adapting the multimedia content within the multimedia sections based on the assigned learner-specific evaluations to render the multimedia content more useful to the learner for learning the foreign language.

Abstract: A display backlight comprises a light guide plate (12b) and independent controllable light sources (10, 11). The plate (12b) is divided into first and second regions (13, 14) having light extraction features, such as corrugations, which direct light travelling in first and second directions, respectively, through the plate out of its front major surface and transmit light travelling in the second and first directions, respectively.