Viewer-side polarizing plate for liquid crystal display device, and liquid crystal display device comprising same

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

• a polarizer;
• and a first protective film formed on a light exit surface of the polarizer,
• wherein the first protective film comprises a first primer layer, a protective film matrix, a second primer layer, and a coating layer sequentially stacked on the polarizer,
• the first protective film satisfying Relation 1:
• (nc+ns)/2−0.025≤np2≤(nc+ns)/2+0.025, <Relation 1>
• where nc indicates a refractive index of the coating layer, ns indicates a refractive index of the protective film matrix, and np2 indicates a refractive index of the second primer layer,
• the protective film matrix having an in-plane retardation of 500 nm or less at a wavelength of 550 nm, as represented by Equation 2:
• Re=(nx−ny)×d, <Equation 2>
• where nx and ny are refractive indices of the protective film matrix in the slow-axis and fast-axis directions thereof at a wavelength of 550 nm, respectively, and d is a thickness of the protective film matrix (unit:
• nm), and
• wherein the first protective film further comprises:
• a low refractivity layer formed on an upper surface of the coating layer and having a lower refractive index than the coating layer.

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

• a polarizer;
• and a first protective film formed on a light exit surface of the polarizer,
• wherein the first protective film comprises a first primer layer, a protective film matrix, a second primer layer, and a coating layer sequentially stacked on the polarizer,
• the first protective film satisfying Relation 1:
• (nc+ns)/2−0.025≤np2≤(nc+ns)/2+0.025, <Relation 1>
• where nc indicates a refractive index of the coating layer, ns indicates a refractive index of the protective film matrix, and np2 indicates a refractive index of the second primer layer,
• the protective film matrix having an in-plane retardation of 500 nm or less at a wavelength of 550 nm, as represented by Equation 2:
• Re=(nx−ny)×d, <Equation 2>
• where nx and ny are refractive indices of the protective film matrix in the slow-axis and fast-axis directions thereof at a wavelength of 550 nm, respectively, and d is a thickness of the protective film matrix (unit:
• nm), and
• wherein the first protective film further comprises:
• a high refractivity layer and a low refractivity layer sequentially formed on an upper surface of the coating layer,
• the low refractivity layer having a lower refractive index than the high refractivity layer.