PRISM SHEET

摘要

PURPOSE: A prism sheet is provided to protect the prism sheet from scratch and deformation. CONSTITUTION: A prism sheet(100) includes a base substrate(110), the first sheet(120) provided on the base substrate, and the second sheet(130) disposed under the base substrate. The first sheet includes a prism pattern having a predetermined pitch width(PW). The peak of the prism pattern is rounded such that the peak has a chord length(CL) corresponding to 10 to 20% of the pitch width and radius of curvature of 20 to 50% of the pitch width. The angle of the valley of the prism pattern is selected from a range of 70 to 110 degrees. The second sheet prevents the base substrate from being deformed and scratched. The second sheet includes dispersion grains for dispersing lights.