Abstract: A system includes a display having a plurality of zones whose luminance is individually controllable, at least one temperature sensor configured to sense at least one of a temperature of the display and a temperature of an ambient environment surrounding the display, and at least one processor. The at least one processor is configured to identify graphical elements to be presented in a sequence of images, determine for each graphical element an importance level and a corresponding set of zones within the display, determine for each zone a minimum luminance level and a maximum luminance level based on at least one graphical element and its importance level, monitor a power usage of the display, and estimate a thermal load based on the power usage and at least one sensed temperature. When the thermal load exceeds a current thermal budget, luminance levels of zones for lowest-importance graphical elements are adjusted.

Abstract: A relative position of an interpupillary midpoint between a first eye and a second eye of a user with respect to an image plane of an image-replicating display is determined. An image to be displayed is generated or retrieved based on the relative position of the interpupillary midpoint with respect to the image plane. This image corresponds to a perspective projection having a view origin at the interpupillary midpoint and aligned with an optical axis of the image-replicating display. The image is displayed via the image-replicating display, which is configured to emit light rays forming a spatially-invariant angular light field from each of a plurality of positions on an exit aperture of the image-replicating display.

Abstract: Images of a user's face are captured at a plurality of time instants. Tracking parameters are determined, tracking parameters include: a pose of the user's head, positions of eyeballs, and at least one of: relative positions of irises with respect to boundaries of the eyeballs, relative positions of irises with respect to corners, shapes of the user's eyes. Uncalibrated gaze vectors of the user's eyes are estimated. A set of uncalibrated gaze vectors is generated. The uncalibrated gaze vectors of the set are stored along with corresponding time instants and tracking parameters. A first subset of uncalibrated gaze vectors whose direction matches with a predefined forward axis of vision, is selected. For the uncalibrated gaze vectors, corresponding tracking parameters are fetched. A maximum distance between the irises is determined. The maximum distance is considered as an interpupillary distance.

Abstract: A system for controlling temperature of a display system includes a display and an optical substrate configured for autostereoscopic viewing, the system having a heat transfer element arranged at least in relation to an optical substrate. The heat transfer element is visually imperceptible when the system is in use. A heat exchanger is thermally coupled to the heat transfer element. The first temperature sensor is configured to measure the first temperature of the display system at the first region. The processor is configured to receive the first temperature from the first temperature sensor and detect when the first temperature lies outside a predefined operating temperature range of the display system and control the heat exchanger to bring the first temperature within the predefined operating temperature range via an exchange of thermal energy between the heat exchanger and the heat transfer element upon the detection.

Abstract: A display device includes a laser light source(s), an active panel including a liquid crystal (LC) layer, and light guide(s). The light guide(s) include a light outlet including a plurality of exit portions, to send the light rays towards the active panel. The light guide(s) are controllable to sequentially guide light rays emitted by the laser light source(s) towards different exit portions of the light outlet. A pixel (or a group of pixels) of an image is displayed, by: (i) determining a corresponding exit portion of the light outlet, (ii) controlling the laser light source(s) to emit the light rays; (iii) controlling the light guide(s) to guide the light rays towards the corresponding exit portion from which the light rays exit towards a corresponding LC cell (or a corresponding group of LC cells) of the LC layer; and (iv) controlling the corresponding LC cell to modulate an intensity of the light rays passing therethrough.

Abstract: A display device includes a backlight unit that is controllable to switch between lights of different colours, and an active panel including a liquid crystal (LC) layer, a linear polarizer, and a drive circuit. Sub-images of an image are displayed by employing temporal multiplexing. Different sets of drive signals are generated for respective sub-images, based on a predefined sequence in which the sub-images are to be displayed. For each sub-image, a set of drive signals is generated to individually control LC cells of the LC layer, based on intensity values of pixels in the sub-image. The LC cells are controlled individually, via the drive circuit, using the different sets of drive signals according to the predefined sequence, whilst controlling the backlight unit to switch between lights of different colours according to the predefined sequence in which the sub-images are to be displayed.

Abstract: A hardware apparatus receives a first image and a second image for a first eye and a second eye of at least one user, and metadata indicating, relative locations of light-emitting cells that can be employed to emit light toward the first eye and the second eye with respect to multiscopic cells in a multiscopic display. The hardware apparatus operates in a streaming manner to: determine, based on the metadata and calibration parameters specific to the multiscopic display, which light-emitting cells are to be employed to emit light toward the first eye and which light-emitting cells are to be employed to emit light toward the second eye; obtain emission values for the determined light-emitting cells based on the first image and the second image; and outputs the output image comprising emission values for the light-emitting cells.

Abstract: A display device includes a light-emitting unit having red light sources, green light sources and blue light sources that are employed to respectively emit red light, green light and blue light of certain wavelengths. A semi-reflective surface of an optical combiner has a multi-band reflective coating that is configured to selectively reflect the red light, the green light and the blue light of these certain wavelengths. An image is displayed via the display device for producing a synthetic light field. The optical combiner is employed to selectively reflect the synthetic light field towards eyes of user(s), whilst optically combining a real-world light field with the synthetic light field.

Abstract: A display device includes a backlight unit that is controllable to switch between lights of different colours, and an active panel including a liquid crystal (LC) layer, a linear polarizer, and a drive circuit. Sub-images of an image are displayed by employing temporal multiplexing. Different sets of drive signals are generated for respective sub-images, based on a predefined sequence in which the sub-images are to be displayed. For each sub-image, a set of drive signals is generated to individually control LC cells of the LC layer, based on intensity values of pixels in the sub-image. The LC cells are controlled individually, via the drive circuit, using the different sets of drive signals according to the predefined sequence, whilst controlling the backlight unit to switch between lights of different colours according to the predefined sequence in which the sub-images are to be displayed.

Abstract: A backlight unit for a liquid crystal display device is disclosed. The backlight unit includes an array of light-emitting elements and a plurality of cavity reflectors, wherein a given cavity reflector partially surrounds a corresponding light-emitting element of said array. The backlight unit further includes a collimator arranged on an optical path of the array of light-emitting elements, a first drive circuit that is employed to individually control the light-emitting elements of said array, and a controller. The controller is configured to generate or receive drive signals for controlling the light-emitting elements of said array, and send the drive signals to the first drive circuit.

Abstract: A first set of reference images is captured using tracking camera(s). Features are extracted from the first set. A first set of features that pertain to at least non-adjustable part(s) of an enclosed space is selected. Positions of the features of the first set are determined. Latest image(s) is/are captured using the tracking camera(s). Features are extracted from the latest image(s). A second set of features that pertain to at least the non-adjustable part(s) and that match with at least a subset of the first set of features, is selected. Positions of the features of the second set are determined. A difference in a position of a given feature of the second set and a position of a corresponding feature of the first set is determined. The tracking camera(s) is/are calibrated.

Abstract: A relative location of each eye of user(s) with respect to an optical combiner is determined. A position and an orientation of a first region of a light-emitting component of a light field display unit is determined. A first region of a given light field image (LFI) is generated, wherein the first region of the light-emitting component displays the first region of the given LFI. A second region of the given LFI is generated, wherein the second region of the light-emitting component displays the second region of the given LFI. When the given LFI is displayed, wherein a first part of a synthetic light field corresponding to the first region of the given LFI is directed towards the user(s), whilst a second part of the synthetic light field corresponding to the second region of the given LFI is directed towards the optical combiner.

Abstract: A relative location of each eye of user(s) with respect to an optical combiner is determined. A position and an orientation of a first region of a light-emitting component of a light field display unit is determined. A first region of a given light field image (LFI) is generated, wherein the first region of the light-emitting component displays the first region of the given LFI. A second region of the given LFI is generated, wherein the second region of the light-emitting component displays the second region of the given LFI. When the given LFI is displayed, wherein a first part of a synthetic light field corresponding to the first region of the given LFI is directed towards the user(s), whilst a second part of the synthetic light field corresponding to the second region of the given LFI is directed towards the optical combiner.

Abstract: A defective sub-region of a display area of a multiscopic display is identified based on a comparison between an actual captured image of the display area and an expected image of the display area that is expected to be captured during display of a first multiscopic image. When it is determined that the defective sub-region overlaps at least partially with a sub-region of the display area to be used to present a virtual object, another sub-region of the display area that does not overlap with the defective sub-region is identified. The virtual object is relocated within a second multiscopic image to use the another sub-region for presenting the virtual object. The second multiscopic image is then displayed after the relocation of the virtual object.

Abstract: An augmented reality system includes a tracker, a transparent display arranged on an optical path of a real-world light field from a real-world environment, at least one real-world facing camera, and at least one processor. The processor is configured to determine a relative position of each eye of at least one user with respect to the transparent display using the tracker, generate or retrieve an image to be displayed based on the determined positions, and determine a corresponding portion of the transparent display from which light rays of a given graphical element are to be directed toward a given eye. The processor is further configured to capture at least one real-world image, determine a colour and luminance of a portion of the real-world light field, calculate colour and luminance differences, adjust at least one graphical parameter based on the differences, and display the image via the transparent display.

Abstract: A relative location of each eye of user(s) is determined with respect to an image plane of a three-dimensional (3D) heads-up display (HUD), and a relative location of a head or each eye of the user(s) is determined with respect to an image plane of a non-transparent display, by utilising tracking means. A first light field image to be displayed via the 3D HUD is generated for producing a part of a synthetic light field. An image to be displayed via the non-transparent display is generated for producing another part of the synthetic light field. The first light field image and the image are simultaneously displayed via the 3D HUD and the non-transparent display, respectively, to produce the synthetic light field.

Abstract: For a given region of a liquid crystal display (LCD) device and a given viewing direction, colour values of an imaginary light ray that originates from at least one virtual object along the given viewing direction and that is to be presented by the given region of the LCD device are determined. This LCD device includes a backlight unit that is configured to produce collimated light rays. A drive signal is generated and sent to control the given region of the LCD device to emit light rays having the colour values of the imaginary light ray. A corresponding portion of an active optical element arranged on an optical path of the backlight unit is controlled, to direct the light rays along the given viewing direction. The aforesaid steps are repeated for respective ones of different viewing directions, by employing temporal multiplexing.

Abstract: A liquid crystal display (LCD) device includes a backlight unit configured to produce collimated light. A relative location of a head or eyes of at least one user with respect to an image plane of the LCD device is determined. A plurality of images are displayed via the LCD device, to sequentially produce sets of collimated light beams. An active optical element, arranged on an optical path of the LCD device, is controlled based on a relative location of a head or a given eye of an individual one of the at least one user with respect to the image plane of the LCD device, to direct a respective one of the sets of collimated light beams towards the head or the given eye of the individual one of the at least one user.

Abstract: A system for improving visibility in low-visibility conditions, being implemented in vehicle, including visible-light camera(s); depth camera(s); display unit; optical combiner; and processor(s). Processor configured to: obtain information indicative of relative position of head or eyes of user(s); control visible-light and depth camera(s) to capture, contemporaneously, visible-light and depth images, of region of real-world environment in front of vehicle. For given visible-light image (GVLI), processor identifies in corresponding depth image, image segment(s) that represents object(s) present in region of real-world environment. Processor identifies corresponding image segment(s) in GVLI whose visual information is any one of: occluded, degraded; and generates image by digitally superimposing virtual element(s) on corresponding image segment(s) of GVLI; and displays image via display unit to produce synthetic light field (SLF), optical combiner reflects SLF towards eyes of user(s).

Abstract: An apparatus for controlling temperature of backlight unit of display system includes: hollow heat transfer element arranged between optical element(s) of backlight unit and printed circuit board of backlight unit when apparatus is in use, wherein a first heat transfer fluid circulates within hollow space of hollow heat transfer element when apparatus is in use, to thermally couple hollow heat transfer element with at least one of: light-emitting elements arranged on printed circuit board, printed circuit board; and heat exchanger thermally coupled to hollow heat transfer element when apparatus is in use, wherein heat exchanger controls temperature of backlight unit to lie within a predefined operating temperature range, by exchange of thermal energy between heat exchanger and hollow heat transfer element via first heat transfer fluid.