BRIGHTNESS ENHANCEMENT ARTICLE

摘要

A brightness enhancement article that includes: (a) a transparent, flexible substrate; (b) a first major surface having an array of prisms with blunted or rounded peaks characterized by a chord whidth, cross-sectional pitch width, and radius of curvature in which the chord width is equal to about 20-40 % o f the cross-sectional pitch width and the radius of curvature is equal to abou t 20-50 % of the cross-sectional pitch width; and (c) a second major surface characterized by a plurality of light scattering protrusions. The article ha s a haze value between about 20-60 % and a transmission value no greater than about 94 % when measured under conditions in which the first surface has a substantially planar topography.