Liquid crystal display device and polarizing plate

A liquid crystal display, comprising:na liquid crystal cell;a light source;a first polarizing plate placed between the liquid crystal cell and the light source; anda second polarizing plate placed on a viewer side of the liquid crystal cell,wherein the first polarizing plate comprises a polarizer and a first protective film placed on a light source side principal surface thereof,wherein, among protective films included in first polarizing plate and the second polarizing plate, only the first protective film satisfies following relations:(i) 0 nm≦Re1≦3000 nm;(ii) Nz1≧5; and(iii) Rth1>2500 nm,wherein Re1, Rth1 and Nz1 are defined by following equations:nRe1=(nx1−ny1)d1;nRth1=(nx1−nz1)d1; andnNz1=Rth1/Re1,nwhereinnd1 represents a thickness of the first protective film,nx1 represents a refractive index in a direction of an in-plane slow axis of the protective film,ny1 represents a refractive index in a direction of an in-plane fast axis of the protective film, andnz1 represents a refractive index in a direction of the thickness of the protective film, andeach refractive index being measured at 23° C. at a measurement wavelength of 590 nm;wherein light emitted from the light source is incident on the first polarizing plate in the form of substantially natural light with an Im/Ix ratio of 0.90 or more,wherein Ix and Im represents maximum and minimum, respectively, of light intensity measured by rotating analyzer method, in which analyzer is rotated by 360°.