Patent ID: 8550668

Claim:
A light control member, comprising: a plate-like member configured to diffuse light emitted from at least one light source, the plate-like member including a first flat surface configured to receive the light, and a second surface configured to diffuse the light, the second surface being facing the first surface and having at least three prism line groups, each group including a plurality of substantially parallel linear prisms; wherein each one of the linear prisms of one prism line group intersect the linear prisms of other prism line groups at one intersection point, and each linear prism is formed into a convex shape having a generally curved outer edge when viewed along its longitudinal direction; and an optical sheet provided on the second surface, the optical sheet comprising a laminate of sheets configured to refract the light emitted from the linear prisms, wherein the refracted light travels in a substantially same direction, and a polarization direction conversion sheet configured to convert the polarization direction of the light emitted from the linear prisms.