Abstract: An optical film for reducing at least one of sparkle and moire in a display system includes a structured first major surface that, in at least a first cross-section in a first plane substantially orthogonal to the optical film, has a sinusoidal shape having a variable pitch of greater than about 0.5 microns. For a substantially normally incident light and blue, green, and red wavelengths that are at least 50 nm apart from each other and are disposed within respective blue, green, and red wavelength ranges, optical transmissions of the optical film versus transmitted angle for the blue, green and red wavelengths have respective blue, green, and red transmission bands disposed at angles greater than about 1 degree and having respective blue, green, and red full width at half maxima (FWHMs), at least two of which at least partially overlap.

Abstract: A backlight to a display includes an array of discrete light sources and a plurality of optical films disposed between the display and the light sources. Each film includes a regular array of intersecting ridges defining a plurality of through-holes. Each of the through-holes extends between first and second open ends of the through-hole. A cross-section of the optical film in a plane parallel to a thickness direction of the film includes two adjacent ridges in the array of ridges and a through-hole therebetween. The film has a maximum thickness hmax and the through-hole includes a side wall with a substantially vertical portion connected to the first open end of the through-hole and a substantially horizontal portion extending from the substantially vertical portion and connected to the second open end. The substantially horizontal portion has a minimum thickness hmin at a location between the two adjacent ridges, hmax/hmin?2.

Abstract: An optical film includes a structured film and a light control film formed on the structured film. The structured film includes a substrate and a plurality of polymeric microstructures formed on a major surface of the substrate. Each microstructure includes an optical facet and a sidewall meeting the optical facet at a ridge of the microstructure. The light control film includes an optically transparent material disposed on and covering the plurality of polymeric microstructures, and a plurality of optically absorptive louvers formed in the optically transparent material opposite the structured film. The louvers extend along a longitudinal direction and are spaced apart along an orthogonal transverse direction. The louvers have an average depth D into the optically transparent material and have an average width W in the transverse direction. D/W can be greater than 2. The optical film is integrally formed.

Abstract: A light control film comprises a light input surface and a light output surface opposite the light input surface. Alternating transmissive regions and absorptive regions are disposed between the light input surface and the light output surface. The absorptive regions have an aspect ratio of at least 30 and the alternating transmissive region and absorptive regions have a relative transmission at a viewing angle of 0 degrees of at least 75%.

Abstract: A curved display includes a display panel having a curved major surface and a light control film disposed proximate the display panel. The curved major surface is curved about a first axis, and a central portion of the curved major surface has a surface normal along a second axis substantially orthogonal to the first axis. The light control film includes a major surface having a substantially same shape as the curved major surface and includes a plurality of alternating optically transmissive and optically absorptive regions. In a cross-section orthogonal to the first axis, a transmissive region and adjacent absorptive regions define a central ray transmission direction through the optically transmissive region such that a light ray emitted by the display panel and transmitted through the optically transmissive region along the transmission direction is refracted upon exiting the curved display into a direction substantially parallel to the second axis.

Abstract: A light control film is described comprising alternating transmissive regions and absorptive regions disposed between the light input surface and the light output surface. The absorptive regions have an aspect ratio of at least 30. In some embodiments, an absorptive layer or reflective layer is disposed between the alternating transmissive regions and absorptive regions and the light input surface and/or light output surface. In another embodiment, the alternating transmissive regions comprise an absorptive material. The light control film can exhibit low transmission of visible light and high transmission of near infrared light. Also described is a light detection system comprising such light control films and a microstructured film.

Abstract: An optical system includes an optical film curved about a first axis and a light control film curved about the first axis. The light control film can be disposed between a light source and the optical film. The optical film includes a microstructured first major surface and an opposing second major surface. The microstructured first major surface defines a linear Fresnel lens including a plurality of Fresnel elements extending longitudinally along the first axis. The first major surface of the optical film faces the light control film. The light control film can include a plurality of alternating optically transmissive and optically absorptive regions extending longitudinally along the first axis such that in a cross-section orthogonal to the first axis, for at least a majority of the optically transmissive regions, a centerline between adjacent optically absorptive regions is substantially normal to a major surface of the light control film.

Abstract: A backlight to a display includes an array of discrete light sources and a plurality of optical films disposed between the display and the light sources. Each film includes a regular array of intersecting ridges defining a plurality of through-holes. Each of the through-holes extends between first and second open ends of the through-hole. A cross-section of the optical film in a plane parallel to a thickness direction of the film includes two adjacent ridges in the array of ridges and a through-hole therebetween. The film has a maximum thickness hmax and the through-hole includes a side wall with a substantially vertical portion connected to the first open end of the through-hole and a substantially horizontal portion extending from the substantially vertical portion and connected to the second open end. The substantially horizontal portion has a minimum thickness hmin at a location between the two adjacent ridges, hmax/hmin?2.

Abstract: A backlight includes a plurality of discrete light sources configured to face a display, and an optical film disposed on the light sources and below and proximate a first plane. The optical film includes a plurality of through-holes extending between first and second major surfaces of the optical film. Each through-hole has a first opening at the first major surface, and a second opening at the second major surface with an open area, A2. Each through-hole has length, H, such that H/A2 is greater than or equal to about 0.13.

Abstract: A light control film is described comprising alternating transmissive regions and absorptive regions disposed between the light input surface and the light output surface. The absorptive regions have an aspect ratio of at least 30. In some embodiments, an absorptive layer or reflective layer is disposed between the alternating transmissive regions and absorptive regions and the light input surface and/or light output surface. In another embodiment, the alternating transmissive regions comprise an absorptive material. The light control film can exhibit low transmission of visible light and high transmission of near infrared light. Also described is a light detection system comprising such light control films and a microstructured film.

Abstract: A backlight includes a plurality of discrete light sources configured to face a display, and an optical film disposed on the light sources and below and proximate a first plane. The optical film includes a plurality of through-holes extending between first and second major surfaces of the optical film. Each through-hole has a first opening at the first major surface, and a second opening at the second major surface with an open area A2. Each through-hole has length, H, such that H/A2 is greater than or equal to about 0.13.

Abstract: An optical construction includes a reflective polarizer layer having a first pass axis and an absorptive polarizer layer having a second pass axis that is substantially aligned with the first pass axis. At least one electrically conductive light scattering layer is arranged between the reflective polarizer layer and the absorptive polarizer layer.

Abstract: An optical system includes an optical film curved about a first axis and a light control film curved about the first axis. The light control film can be disposed between a light source and the optical film. The optical film includes a microstructured first major surface and an opposing second major surface. The microstructured first major surface defines a linear Fresnel lens including a plurality of Fresnel elements extending longitudinally along the first axis. The first major surface of the optical film faces the light control film. The light control film can include a plurality of alternating optically transmissive and optically absorptive regions extending longitudinally along the first axis such that in a cross-section orthogonal to the first axis, for at least a majority of the optically transmissive regions, a centerline between adjacent optically absorptive regions is substantially normal to a major surface of the light control film.

Abstract: An optical system includes an optical film curved about a first axis and a light control film curved about the first axis and substantially coextensive with the optical film. The optical film includes a first layer including a microstructured first major surface where the microstructured first major surface defines a linear Fresnel lens including a plurality of Fresnel elements extending along the first axis. The first major surface of the optical film faces the light control film. The light control film includes a plurality of spaced apart optically absorptive regions extending along the first axis and along a direction substantially normal to a major surface of the light control film. At least one of the optical film or at least one layer disposed between the optical film and the light control film includes at least one reflection mitigation element.

Abstract: An integral multilayer optical construction includes opposing first and second structured major surfaces having two-dimensional arrays of respective first and second structures. An optical diffuser is embedded within the optical construction between the first and second structured major surfaces. The optical diffuser has an optical haze of greater than about 5% for at least one visible wavelength in a visible wavelength range extending from about 420 nm to 680 nm. When the optical construction is disposed on a light source with one of the first and second structured major surfaces facing the light source, light emitted by the light source is transmitted by the optical construction with a cross-section of an angular luminous distribution of the transmitted light in at least one first plane that includes a normal to the optical construction, including first and second intensity peaks at respective first and second angles on opposite sides of the normal.

Abstract: An optical system includes a light source, an optical film curved about a first axis, and a light control film curved about the first axis and disposed between the light source and the optical film. The optical film includes a microstructured first major surface and an opposing second major surface. The microstructured first major surface defines a linear Fresnel lens including a plurality of Fresnel elements extending longitudinally along the first axis. The first major surface of the optical film faces the light control film. The light control film includes a plurality of alternating optically transmissive and optically absorptive regions extending longitudinally along the first axis such that in a cross-section orthogonal to the first axis, for at least a majority of the optically transmissive regions, a centerline between adjacent optically absorptive regions is substantially normal to a major surface of the light control film.

Abstract: An optical film includes a structured film and a light control film formed on the structured film. The structured film includes a substrate and a plurality of polymeric microstructures formed on a major surface of the substrate. Each microstructure includes an optical facet and a sidewall meeting the optical facet at a ridge of the microstructure. The light control film includes an optically transparent material disposed on and covering the plurality of polymeric microstructures, and a plurality of optically absorptive louvers formed in the optically transparent material opposite the structured film. The louvers extend along a longitudinal direction and are spaced apart along an orthogonal transverse direction. The louvers have an average depth D into the optically transparent material and have an average width W in the transverse direction. D/W can be greater than 2. The optical film is integrally formed.

Abstract: An optical film has a major surface including a plurality of microstructures. Each microstructure includes an optical facet and a sidewall meeting the optical facet at a ridge of the microstructure. The optical facet and the sidewall define an oblique angle therebetween. For each microstructure in at least a majority of the microstructures, an optically absorptive layer is disposed on the sidewall. The optical film can include a polymeric layer having a microstructured surface at least partially coated with an inorganic optically transparent layer. The optically absorptive layer can an average thickness t where 100 nm<t<1 micrometer. A first layer can be disposed between the sidewall and the optically absorptive layer where the first layer has a lower extinction coefficient than the optically absorptive layer.

Abstract: A light control film comprises a light input surface and a light output surface opposite the light input surface. Alternating transmissive regions and absorptive regions are disposed between the light input surface and the light output surface. The absorptive regions have an aspect ratio of at least 30 and the alternating transmissive region and absorptive regions have a relative transmission at a viewing angle of 0 degrees of at least 75%.

Abstract: An optical system includes a light source, an optical film curved about a first axis, and a light control film curved about the first axis and disposed between the light source and the optical film. The optical film includes a microstructured first major surface and an opposing second major surface. The microstructured first major surface defines a linear Fresnel lens including a plurality of Fresnel elements extending longitudinally along the first axis. The first major surface of the optical film faces of the optically transmissive regions, a centerline between adjacent optically absorptive regions is substantially normal to a major surface of the light control film.