Distance Technologies Oy

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.

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.

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.

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.

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.

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.

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.

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).

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.

A system includes a windshield and processor(s). The windshield has a first substrate and a second substrate that are optically transparent, and a liquid crystal (LC) layer encased between the first substrate and the second substrate. A surface of at least one of: the first substrate and the second substrate that is in contact with the LC layer has at least one optical feature that pertains to at least one optical property. The at least one optical property includes at least one of: optical power, diffraction, refraction, transmittance, reflectance, polarization. The processor(s) are configured to selectively adjust a refractive index of an LC material in at least a given portion of the LC layer, to modulate the at least one optical property in a corresponding portion of the windshield.