Prism sheet and display device using the same

Abstract

A prism sheet for emitting an incident light in an even distribution state of light quantity even in the case of using an irradiating light source such as a point light source having an emission of narrow band. A display device for deflecting and displaying the light from the light source evenly and efficiently without deteriorating the display quality by applying the prism sheet thereto. A prism sheet for deflecting and emitting a light introduced into a transparent substrate, with a prism formed on the substrate. The prism sheet includes: a circular prism having a plurality of annular grooves arrayed concentrically from a center axis; and a radial prism having a plurality of straight grooves arrayed radially from the center axis.

Dependencies are inferred from the claim text.