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: 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 display device improves illumination uniformity and form factor for a backlight unit (BLU). The display device includes a display area having pixels and a BLU at a back side of the display area. The BLU is configured to direct light to the pixels. The BLU includes a diffusion plate with a top side, a bottom side, and a right side connecting the top side and the bottom side, and a left side at an opposite side of the right side and connecting the top side and the bottom side. The BLU includes light sources located at one or more of the left and right sides of the diffusion plate to emit light into the diffusion plate. The left and right sides may include slanted portions connecting center portions of the left and right sides to the top and bottom sides. Light sources may be located at the slanted portions.

Abstract: A system may include one or more electronic devices. Fiber bundles may be provided to convey light. A fiber bundle may have a bend along its length. Fibers for the fiber bundle may be formed from polymer cores coated with polymer claddings. The fibers may have end faces coated with antireflection coatings. The antireflection coatings may be formed from amorphous fluoropolymer deposited from solution. The fluoropolymer may be applied to the end faces of the fibers by dipping, spraying, or by dispensing with a needle dispenser or other dispensing tool. An optical component such as a light-emitting device for a communications system, an illumination system, or a sensor system may provide infrared light that is guided through the fiber bundle.

Abstract: An electronic device may have a housing with a display. The display may be overlapped by an image transport layer such as a coherent fiber bundle or layer of Anderson localization material. The image transport layer may have an input surface that receives an image from the display and a corresponding output surface to which the image is transported. The input surface and output surface may have different shapes. During fabrication of the image transport layer, molding techniques, grinding and polishing techniques, and other processes are used to deform the image transport layer and the shape of the output surface. The area of peripheral portions of the output surface may expand relative to central portions. Optical uniformity across the output surface can be enhanced by maintaining uniformity in fiber core diameters and other attributes of the image transport layer across deformed and undeformed portions of the output surface.

Abstract: An electronic device may have a housing with a display. A protective display cover layer for the display may have an image transport layer such as an image transport layer formed from optical fibers. Extruded filaments of binder material may be fused together to form a layer of binder for the image transport layer. Each filament may contain multiple embedded optical fibers. As a result of the extrusion process, the optical fibers may be characterized by increasing lateral deformation at increasing distances from the center of the filament in which the optical fibers are embedded. Tension variations and variations in the orientation angle of the fibers in the image transport layer can be maintained below desired limits to ensure satisfactory optical performance for the image transport layer. The optical fibers and binder may be formed from polymers or other clear materials.

Abstract: A display may have a backlight with a row of light-emitting diodes that emit light into an edge surface of a light guide layer. The light guide layer may have opposing planar surfaces. Light-scattering structures such as light-scattering holes that extend between the planar surfaces may be used to scatter rays of light by refraction and/or diffraction and can thereby homogenize light from the light-emitting diodes. The homogenized light may then be extracted from the light guide layer and may serve as backlight illumination for an array of pixels such as an array of liquid crystal display pixels. Light-scattering structures such as grooves, pits, bumps, and other structures for scattering light from the light-emitting diodes may be formed on the edge surface of the light guide layer to enhance light mixing.