Abstract: An optical system (200) includes an emissive display (220) and a reflective polarizer (100) disposed on the display (220). The display (220) includes a blue pixel (222b) emitting light having a peak at a wavelength ?b. For substantially normally incident light: for the wavelength ?b, the reflective polarizer (100) reflects at least 30% of the incident light having a first polarization state (b) and transmits at least 75% of the incident light having an orthogonal second polarization state(a); and for at least one wavelength ?1 greater than ?b, ?1-?b?50 nm, the reflective polarizer (100) transmits at least 75% of the incident light for each of the first and second polarization states. For the wavelength ?b, the reflective polarizer (100) has a maximum optical transmittance Tmax for light incident at a first incident angle, and an optical transmittance Tmax/2 for light incident at a second incident angle greater than the first incident angle by less than about 50 degrees.

Abstract: This application provides an adhesive film and a preparation method thereof, a composite assembly, and an electronic device. The adhesive film is prepared through a cross-linking reaction of a prepolymer. The prepolymer includes an alkyl acrylate soft monomer and an acrylate polar monomer. A mass fraction of the alkyl acrylate soft monomer in the prepolymer is greater than or equal to 60 wt %. A mass fraction of the acrylate polar monomer in the prepolymer is less than 30 wt %. The adhesive film provided in this application has an excellent low modulus at a low temperature and a high creep recovery rate, and can be used to improve a service life of a foldable electronic device in repeated folding processes.

Abstract: An optical system includes a multilayer optical film configured to block transmission of visible light but allow peaks or bands of certain visible wavelengths to pass through; an object disposed on a first side of the multilayer optical film; and a light source and a light sensor disposed on an opposite second side of, and facing, the multilayer optical film. The object is configured to receive light emitted by the light source through the multilayer optical film. The light sensor is configured to receive light from the multilayer optical film. An optical filter may include the multilayer optical film disposed on a wavelength selective scattering layer and/or on a wavelength selective absorbing layer. The wavelength selective scattering layer may have a near-infrared scattering ratio of less than about 0.9.

Abstract: A display (1000) including a display panel (130) and a polarizer (110) disposed to receive a light (150) output of the display panel (130) is described. The polarizer (150) may be a reflective polarizer (110) or a circular polarizer (100) incorporating a reflective polarizer (110). The display panel (130) includes a plurality of pixels and each pixel includes a plurality of subpixels. The reflective polarizer (110) has a first reflection band, wherein at normal incidence, the first reflection band has a long wavelength band edge wavelength between peak emission wavelengths of two subpixels in the plurality of subpixels. The reflective polarizer (110) may be disposed between an absorbing polarizer (106) and a retarder (108) in a circular polarizer (100). The reflective polarizer (110) may have substantially non-overlapping first, second, and third reflection bands.

Abstract: This application provides a flexible screen cover. The flexible screen cover includes a protective layer, a main layer, and a buffer layer. A modulus ratio of the main layer to the buffer layer is 8 to 180000. The buffer layer can be disposed at any proper position in the flexible screen. A modulus ratio of an adjacent layer to a buffer layer is 2 to 500000. The collapsible electronic device includes a housing and a flexible screen, and the flexible screen is installed in the housing. This application can improve impact resistance performance of the flexible screen.

Abstract: An optical system (200) includes an emissive display (220) and a reflective polarizer (100) disposed on the display (220). The display (220) includes a blue pixel (222b) emitting light having a peak at a wavelength ?b. For substantially normally incident light: for the wavelength ?b, the reflective polarizer (100) reflects at least 30% of the incident light having a first polarization state (b) and transmits at least 75% of the incident light having an orthogonal second polarization state(a); and for at least one wavelength ?1 greater than ?b, ?1-?b?50 nm, the reflective polarizer (100) transmits at least 75% of the incident light for each of the first and second polarization states. For the wavelength ?b, the reflective polarizer (100) has a maximum optical transmittance Tmax for light incident at a first incident angle, and an optical transmittance Tmax/2 for light incident at a second incident angle greater than the first incident angle by less than about 50 degrees.

Abstract: A system may include one or both of a light emitter and a light receiver, and an optical filter. The optical filter includes a wavelength selective scattering layer. The wavelength selective scattering layer may have a near-infrared scattering ratio of less than about 0.9. The filter may have a visible reflective haze ratio of greater than about 0.5. A method may include disposing the wavelength selective scattering layer adjacent one or both of the light emitter and the light receiver. The optical filter may include a wavelength selective reflective layer. The optical filter may include a wavelength selective absorbing layer. An article may include the optical filter. The wavelength selective scattering layer may have an average near-infrared scattering of less than 60%, an average visible scattering of greater than 10%, and a difference between the % total visible reflectance and the % diffuse visible reflectance of less than 20.

Abstract: A system may include one or both of a light emitter (46) and a light receiver (40), and an optical filter (10). The optical filter (10) includes a wavelength selective scattering layer (14). The wavelength selective scattering layer (14) may have a near-infrared scattering ratio of less than about 0.9. The filter (10) may have a visible reflective haze ratio of greater than about 0.5. A method may include disposing the wavelength selective scattering layer (14) adjacent one or both of the light emitter (46) and the light receiver (40). The optical filter (10) may include a wavelength selective reflective layer (16). The optical filter (10) may include a wavelength selective absorbing layer (34). An article may include the optical filter (10).

Abstract: A display (1000) including a display panel (130) and a polarizer (110) disposed to receive a light (150) output of the display panel (130) is described. The polarizer (150) may be a reflective polarizer (110) or a circular polarizer (100) incorporating a reflective polarizer (110). The display panel (130) includes a plurality of pixels and each pixel includes a plurality of subpixels. The reflective polarizer (110) has a first reflection band, wherein at normal incidence, the first reflection band has a long wavelength band edge wavelength between peak emission wavelengths of two subpixels in the plurality of subpixels. The reflective polarizer (110) may be disposed between an absorbing polarizer (106) and a retarder (108) in a circular polarizer (100). The reflective polarizer (110) may have substantially non-overlapping first, second, and third reflection bands.