POLARIZING PLATE AND OPTICAL DISPLAY APPARATUS
A polarizing plate and an optical display apparatus including the same are provided. A polarizing plate includes: a polarizer; and a first protective film stacked on a surface of the polarizer, and the first protective film has a total haze of 40% to 60% and an internal haze of 3% to 7%, and the polarizing plate has a light transmittance ratio of 0.008 or less, as calculated according to Equation 1.
1 . A polarizing plate comprising:
a polarizer; and
a first protective film stacked on a surface of the polarizer,
wherein the first protective film has a total haze of 40% to 60% and an internal haze of 3% to 7%, and the polarizing plate has a light transmittance ratio of 0.008 or less, as calculated according to the following Equation 1:
Light transmittance ratio=Tc(380 nm to 420 nm)/Tc(780 nm),
where Tc (780 nm) denotes a crossed transmittance of the polarizing plate at a wavelength of 780 nm (unit: %), and
Tc (380 nm to 420 nm) denotes a maximum value of a crossed transmittance of the polarizing plate at a wavelength of 380 nm to 420 nm (unit: %).
2 . The polarizing plate as claimed in claim 1 , wherein the first protective film has an external haze-to-internal haze ratio of 9 to 20.
3 . The polarizing plate as claimed in claim 1 , wherein the first protective film comprises a base layer and an antiglare layer stacked on a surface of the base layer.
4 . The polarizing plate as claimed in claim 3 , wherein the antiglare layer comprises at least one selected from among organic particles and inorganic particles.
5 . The polarizing plate as claimed in claim 1 , wherein the polarizing plate has a light transmittance ratio of 0.003 to 0.008, as calculated according to Equation 1.
6 . The polarizing plate as claimed in claim 1 , wherein the polarizing plate has a crossed transmittance of 0% to 20% at a wavelength of 780 nm.
7 . The polarizing plate as claimed in claim 1 , wherein the maximum value of the crossed transmittance of the polarizing plate at a wavelength of 380 nm to 420 nm is present at a wavelength of 395 nm to 410 nm.
8 . The polarizing plate as claimed in claim 1 , wherein the maximum value of the crossed transmittance of the polarizing plate at a wavelength of 380 nm to 420 nm is 0.001% to 0.1%.
9 . The polarizing plate as claimed in claim 1 , wherein the polarizing plate has a Tc-to-total haze ratio of 0.35 or less, as calculated according to the following Equation 2:
Tc-to-total haze ratio=Tc(780 nm)/total haze,
where the total haze is a total haze of the first protective film (unit: %), and
Tc (780 nm) denotes a crossed transmittance of the polarizing plate at a wavelength of 780 nm (unit: %).
10 . The polarizing plate as claimed in claim 1 , wherein the polarizing plate has a Tc-to-internal haze ratio of 5.0 or less, as calculated according to the following Equation 3:
Tc-to-internal haze ratio=Tc(780 nm)/internal haze,
where the internal haze is an internal haze of the first protective film (unit: %), and
Tc (780 nm) denotes a crossed transmittance of the polarizing plate at a wavelength of 780 nm (unit: %).
11 . The polarizing plate as claimed in claim 1 , wherein the polarizing plate has a crossed transmittance of 1.0% to 1.3% in a machine direction of the polarizer and a crossed transmittance of 0.05% or less in a transverse direction of the polarizer at a wavelength of 380 nm.
12 . The polarizing plate as claimed in claim 1 , wherein the first protective film further comprises an antireflection layer stacked on a surface of the antiglare layer.
13 . The polarizing plate as claimed in claim 1 , wherein the first protective film is stacked alone on the surface of the polarizer.
14 . The polarizing plate as claimed in claim 1 , further comprising a second protective film stacked on another surface of the polarizer.
15 . An optical display apparatus comprising the polarizing plate as claimed in claim 1 .