REFLECTION FILM, OPTICAL MEMBER, AND DISPLAY

摘要

The present invention provides a reflection film, comprising a right circularly-polarized light reflection layer and a left circularly-polarized light reflection layer as circularly-polarized light reflection layers, each of the circularly-polarized light reflection layers consisting of a layer obtained by fixing a cholesteric liquid-crystalline phase, having a reflection wavelength at which a diffuse reflectance for non-polarized light becomes 50% or more in a wavelength region in which each of the circularly-polarized light reflection layers exhibits selective reflection, the reflection wavelength being in an infrared wavelength region, and the reflection film exhibiting a direct transmittance of non-polarized visible light of 50% or more and a haze value of 5% or less; and an optical member including the reflection film, which can be used as a handwriting input sheet. The optical member can be used by being stuck to the surface of a display.

主权项

1. A reflection film, comprising a right circularly-polarized light reflection layer that selectively reflects right circularly-polarized light and a left circularly-polarized light reflection layer that selectively reflects left circularly-polarized light as circularly-polarized light reflection layers,
each of the circularly-polarized light reflection layers consisting of a layer obtained by fixing a cholesteric liquid-crystalline phase, the reflection film having a reflection wavelength at which a diffuse reflectance for non-polarized light becomes 50% or more in a wavelength region in which each of the circularly-polarized light reflection layers exhibits selective reflection, the reflection wavelength being in an infrared wavelength region, and the reflection film exhibiting a direct transmittance of non-polarized visible light of 50% or more and a haze value of 5% or less.