Light source-side polarizing plate including primer layers having different refractive indexes for liquid crystal display device, and liquid crystal display device comprising same

A light source-side polarizing plate for liquid crystal display devices, comprising:

• a polarizer;
• and
• a protective film formed on a light incidence surface of the polarizer,
• wherein the protective film comprises a first primer layer, a protective film base material, and a second primer layer sequentially stacked on the polarizer,
• the protective film satisfying Equation 1 or Equation 2, where np1 indicates a refractive index of the first primer layer, np2 indicates a refractive index of the second primer layer, and nx and ny indicate refractive indices of the protective film base material at a wavelength of 550 nm in x-axis and y-axis directions thereof, respectively:
• np2<np1<nx<ny <Equation 1>
• np2<np1<ny<nx;
• <Equation 2>
• and wherein a difference in refractive index (np1−np2) between the first primer layer and the second primer layer is greater than 0 and equal to or less than 0.1;
• each of the first primer layer and the second primer layer has a thickness of 60 nm to 120 nm;
• and
• an absolute value (|nx−ny|) of a difference between nx and ny of the protective film base material is greater than 0 and equal to or less than 0.01.