Abstract: A near-eye display includes a display panel (e.g., a liquid crystal display (LCD) panel or organic light emitting diode (OLED) display panel) configured to generate a display image, and display optics configured to project the display image to a user. The near-eye display also includes an optical attenuation layer formed on the display optics, between the display optics and the display panel and spaced apart from the display panel, or on a side of the display optics opposing the display panel. The optical attenuation layer includes, for example, a polarization film, an infrared (IR) blocking coating, an IR blocking optically clear adhesive layer, a photochromic (or UV blocking) coating, or a combination thereof. In some examples, the optical attenuation layer is formed on an accessory device (e.g., a prescription lens or a lens cover) of the near-eye display.

Abstract: An optical subassembly for switchably focusing or redirecting a light beam may include a polarization element having a polarization-selective beam redirection/focusing property, a first switchable polarization rotator upstream of the polarization element, and a second switchable polarization rotator downstream of the polarization element. A polarizer may be provided immediately downstream of the second switchable polarization rotator. The first and second switchable polarization rotators may be operated in counterphase, so as to mutually offset dependence of angle and wavelength characteristics of the polarization rotators on the switching state of the polarization rotators.

Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated with backlight illumination from a direct-lit backlight unit. The backlight unit may include an array of light-emitting diodes (LEDs) on a printed circuit board. The display may have a notch to accommodate an input-output component. Reflective layers may be included in the notch. The backlight may include a color conversion layer with a property that varies as a function of position. The light-emitting diodes may be covered by a slab of encapsulant with recesses in an upper surface.

Abstract: A liquid crystal pixel includes liquid crystals, a source electrode, and a transparent common electrode layer. The liquid crystals are configured to change an alignment of the liquid crystals in response to a voltage applied across the source electrode and the transparent common electrode layer. The slit in the transparent common electrode layer includes multiple angled sections.

Abstract: A liquid crystal display (LCD) system for a head mounted display includes an LCD panel and a backlight unit. The LCD panel includes a color filter on array (COA) configuration. The backlight unit includes a light adjustment layer to adjust at least one characteristic of illumination light from a light source to tune the illumination light for enlarging an emission cone of display light.

Abstract: A liquid crystal display panel for near-eye display comprises a liquid crystal (LC) panel and a backlight unit (BLU). The BLU includes an array of blue light-emitting diodes (LEDs); a light guide plate configured to guide the blue light from the array of blue LEDs through total internal reflection, and couple portions of the blue light guided by the light guide plate out of the light guide plate; a quantum dot film including quantum dots configured to absorb blue light and emit red and green light; a brightness enhancement film configured to transmit incident light within an angular range and reflect incident light outside of the angular range; and an optical efficiency enhancement film configured to modify an angular beam profile of light from the quantum dot film such that the light transmitted by the brightness enhancement film has a peak intensity in a direction perpendicular to the LC panel.

Abstract: A light-emitting diode (“LED”) package includes a package housing defining a space. The LED package includes a first LED disposed with the space defined by the package housing, and configured to emit a first light having a blue wavelength range. The blue wavelength range has a peak wavelength ranging from about 440 nm to about 480 nm. The LED package includes a second LED disposed within the space, and configured to emit a second light having a red wavelength range. The red wavelength range has a peak wavelength ranging from about 610 nm to about 680 nm. The LED package includes a phosphor filler filling the space and configured to absorb a portion of the first light to emit a third light having a green wavelength range. The green wavelength range has a peak wavelength ranging from about 510 nm to about 570 nm.

Abstract: The disclosed system may include a display; a lens; and a diffractive optical element, where the diffractive optical element is configured to increase a fill factor of the display when the lens is used to magnify the display. Various other apparatuses, systems, and methods are also disclosed.

Abstract: Narrowing of an eyebox in a display including a display panel and an ocular lens caused by uniform illumination of the display panel may be reduced by using a redistributor that provides a spatially variant angular distribution of brightness matched to performance of the ocular lens. When a beam of light from a pixel of the display panel has a first dependence of a beam coordinate at the image plane upon a pixel coordinate at the object plane when the display panel is illuminated with light having a spatially uniform angular distribution of brightness, the redistributor may be configured to convert the spatially uniform angular distribution of brightness of light illuminating the display panel into a spatially non-uniform angular distribution of brightness for lessening the first dependence.

Abstract: A liquid crystal panel may include a layer with a plurality of rounded rectangular structures such as through vias of an active matrix layer. A loss of contrast may result from the illuminating light undergoing a Fresnel refraction by the rounded rectangular structures. In particular, rounded walls of the structures may rotate a direction of polarization of a linearly polarized illuminating light, causing light leakage in the black state of the panel. Reduction of the rounded portions of the vias may improve the overall contrast of the LC panel, as well as orienting the polarization of the impinging illuminating light to be parallel or perpendicular to the structures.

Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated with backlight illumination from a direct-lit backlight unit. The backlight unit may include an array of light-emitting diodes (LEDs) on a printed circuit board. The display may have a notch to accommodate an input-output component. Reflective layers may be included in the notch. The backlight may include a color conversion layer with a property that varies as a function of position. The light-emitting diodes may be covered by a slab of encapsulant with recesses in an upper surface.

Abstract: An air-ground joint trajectory planning and offloading scheduling method and system for distributed multiple objectives is provided. At the beginning of each timeslot, an unmanned aerial vehicle (UAV) selects a flight direction based on a total energy consumption of all devices and a total amount of unprocessed data of all the devices in the current system, and flies a fixed distance towards a certain direction. Before the UAV reaches a new location, each terrestrial user independently selects a task data offloading scheduling strategy based on the total energy consumption of all the devices and the total amount of the unprocessed data of all the devices in the current system. In order to improve an expected long-term average energy efficiency and data processing capability, the present disclosure also provides average feedbacks for an energy consumption and unprocessed data.

Abstract: An electronic device may be provided with a display. The display may be overlapped by an antiglare film. The antiglare film may have a rough surface to diffuse incident light, thereby reducing glare. Additionally, the antiglare film may have a smooth portion that forms a transparent window and allows light to pass through undiffused. The electronic device may include a light-based component, such as a camera, that receives undiffused light through the transparent window. By overlapping the light-based component with the transparent window, the light-based component may receive the light in an unimpeded manner, thereby making more accurate measurements of the light. The display may have one or more display layers, such as opaque masking layers or polarizers, with openings that are aligned with the transparent window. The light-based component may receive the light through these openings so that the light is not absorbed or polarized before reaching the component.

Abstract: The present disclosure provides a novel multi-purpose adjustable hanging beam and a hanging method. The novel multi-purpose adjustable hanging beam includes two parallel main beams, two ends of each main beam are respectively connected with end beams, a plurality of displacement hangers sliding relative to the main beams are arranged on the main beams, screw rods are arranged between the two main beams, the displacement hangers are in threaded connection with the screw rods, a first motor is arranged at one end of each screw rod, reduction gearboxes are arranged between the first motors and the screw rods, one end of each screw rod is connected with the corresponding reduction gearbox, and the first motors and the reduction gearboxes are mounted on the end beams.

Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated with backlight illumination from a direct-lit backlight unit. The backlight unit may include an array of light-emitting diodes (LEDs) on a printed circuit board. The display may have a notch to accommodate an input-output component. Reflective layers may be included in the notch. The backlight may include a color conversion layer with a property that varies as a function of position. The light-emitting diodes may be covered by a slab of encapsulant with recesses in an upper surface.

Abstract: A method for improving readability of a display inside a motorized object comprises applying a polarization means on a side window of a motorized object, wherein an ambient incident light ray comes through the side window and is reflected by a surface of a display inside the motorized object to form a reflected light ray, and substantially filtering out display incident light S-polarization and allowing display incident light P-polarization to pass through. The polarization means has a linear polarization reflecting or absorbing direction that is substantially parallel to the plane of the surface of the display. A display readability enhancing system comprises the polarization means. When ambient light passes through the window and shines onto the interior display, the dominant light polarization is p-polarization for the interior display with minimum surface reflectivity upon reflecting from the interior display, resulting in good display visibility under strong ambient light conditions.

Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated with backlight illumination from a direct-lit backlight unit. The backlight unit may include an array of light-emitting diodes (LEDs) on a printed circuit board. The display may have a notch to accommodate an input-output component. Reflective layers may be included in the notch. The backlight may include a color conversion layer with a property that varies as a function of position. The light-emitting diodes may be covered by a slab of encapsulant with recesses in an upper surface.

Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated with backlight illumination from a direct-lit backlight unit. The backlight unit may include an array of light-emitting diodes (LEDs) on a printed circuit board. The display may have a notch to accommodate an input-output component. Reflective layers may be included in the notch. The backlight may include a color conversion layer with a property that varies as a function of position. The light-emitting diodes may be covered by a slab of encapsulant with recesses in an upper surface.

Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated with backlight illumination from a direct-lit backlight unit. The backlight unit may include an array of light-emitting diodes (LEDs) on a printed circuit board. The display may have a notch to accommodate an input-output component. Reflective layers may be included in the notch. The backlight may include a color conversion layer with a property that varies as a function of position. The light-emitting diodes may be covered by a slab of encapsulant with recesses in an upper surface.

Abstract: An electronic device may be provided with a display. The display may be overlapped by an antiglare film. The antiglare film may have a rough surface to diffuse incident light, thereby reducing glare. Additionally, the antiglare film may have a smooth portion that forms a transparent window and allows light to pass through undiffused. The electronic device may include a light-based component, such as a camera, that receives undiffused light through the transparent window. By overlapping the light-based component with the transparent window, the light-based component may receive the light in an unimpeded manner, thereby making more accurate measurements of the light. The display may have one or more display layers, such as opaque masking layers or polarizers, with openings that are aligned with the transparent window. The light-based component may receive the light through these openings so that the light is not absorbed or polarized before reaching the component.