| 摘要 |
<p>The present invention is characterized by being a rectangular liquid crystal display module which includes a liquid crystal display element in which a liquid crystal cell is sandwiched between a pair of polarizing plates, an optical sheet overlaid on the back face side of the liquid crystal display element, and a surface illuminant backlight overlaid on the back face side of the optical sheet, wherein the optical sheet includes a resin substrate film having an optical anisotropy, and provided that: with respect to the short side orientation as a base, angle of the polarization orientation of the rays of light outgoing from the backlight front face is designated as ³; and angle of the transmission axial orientation of the back face side-polarizing plate is designated as ´, the angle of the crystallographic axial orientation of the substrate film falls within the range of ±50% of a value µ (i.e., 0.5 x µ or greater and 1.5 x µ or less) calculated by the following mathematical formula (I) and mathematical formula (II): I µ = ³ + ´ - ³ / 2 in the case of ³ ‰ ´ ; and II µ = ´ + ³ - ´ / 2 in the case of ³ ‰ ´ .</p> |
