Patent ID: 7986388

Claim:
A rectangular liquid crystal display module having a frontward face and a rearward face, comprising: a liquid crystal display element, including a liquid crystal cell having a first polarizing plate positioned immediately adjacent to a front face of the liquid crystal cell and a reflection polarizing plate positioned immediately adjacent to a rear face of the liquid crystal cell; an optical sheet positioned rearward of the liquid crystal cell and reflection polarizing plate; and an opposed edge light type surface illuminant backlight positioned rearward of the optical sheet; wherein the optical sheet comprises: a substrate film formed into a rectangular shape and made of a resin; and an optical layer laminated on one face of the substrate film, wherein said substrate film has an optical anisotropy, an absolute value of an angle of crystal orientation with respect to a short side orientation is π/8 or greater and 3π/8 or less, and a retardation value is between 70 nm to 320 nm.