Abstract: A system includes a display having a plurality of zones whose luminance is individually controllable, and at least one processor. The at least one processor is configured to identify graphical elements to be presented, determine for each graphical element an importance level and a corresponding set of zones within the display, determine for each zone minimum and maximum luminance levels based on at least one graphical element and its importance level, estimate for each zone minimum and maximum power consumption values based on respective luminance levels, calculate a maximum total power consumption value, determine whether the maximum total power consumption value exceeds a current power budget, and when it does, adjust luminance levels of zones corresponding to graphical elements having a lowest importance level until a first adjusted total power consumption value does not exceed the current power budget.

Abstract: Light field images are displayed via a light field display unit to produce a synthetic light field presenting at least one virtual object to a given user. When it is detected that a difference between a focus depth at which the given user is gazing and a given optical depth at which the at least one virtual object is being presented is more than a predefined threshold difference, at least one of: dimming, blurring, is performed on a virtual image to be presented to a non-dominant eye of the given user. A current light field image is generated by utilising this virtual image and another virtual image to be presented to a dominant eye. The current light field image is displayed via the light field display unit to produce a current synthetic light field presenting the at least one virtual object.

Abstract: A heads-up display system, a first reflective interface is arranged obliquely along an optical path of light rays emitted from a display. A second transparent interface is obliquely oriented with respect to the optical path of the light rays reflected from the first reflective interface. The light rays are incident on the second transparent interface from within a first optical medium, whereby the light rays undergo total internal reflection. A third semi-reflective interface is arranged obliquely along the optical path of the light rays reflected from the second transparent interface. The third semi-reflective interface is oriented to reflect the light rays toward an eyebox of the heads-up display system, while optically combining the light rays with a real-world light field.

Abstract: For a given position of a given eye, a mapping between a plurality of viewing-direction vectors originating therefrom and corresponding display locations on a display is generated. A mesh representing input content for the given position of the given eye is generated. For each vertex of the mesh, a reprojected vertex position is determined based on its position relative to a reference, a pose of the reference when the input content was generated, and a predicted pose of the reference at or proximate to a display time. A corresponding viewing-direction vector originating from the given eye and passing through the reprojected vertex position is determined. A distortion-corrected display location on the display is determined by applying the mapping to the corresponding viewing-direction vector. Vertices of the mesh are rasterized onto an image buffer for the given eye, using respective distortion-corrected display locations of the vertices.

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: 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 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: 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 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 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 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.