POLARIZING PLATE AND OPTICAL DISPLAY DEVICE
A polarizing plate and an optical display device including the same are disclosed. A polarizing plate includes a polarizer, and a first retardation layer laminated on a surface of the polarizer, the first retardation layer is a liquid crystal retardation layer, and the first retardation layer includes first regions on opposite end portions of the first retardation layer in a width direction, and a second region between the first regions, and each of the first regions has a tear strength lower than a tear strength of the second region.
1 . A polarizing plate comprising:
a polarizer; and
a first retardation layer laminated on a surface of the polarizer,
wherein the first retardation layer is a liquid crystal retardation layer, and
the first retardation layer comprises first regions on opposite end portions of the first retardation layer in a width direction, and a second region between the first regions,
wherein each of the first regions has a tear strength less than a tear strength of the second region.
2 . The polarizing plate as claimed in claim 1 , wherein the first regions are liquid crystal non-alignment regions, and
the second region is a liquid crystal alignment region.
3 . The polarizing plate as claimed in claim 1 , wherein a ratio of the tear strength of each of the first regions to the tear strength of the second region [(tear strength of each of the first regions)/(tear strength of the second region)] is greater than 0 and less than or equal to 0.5.
4 . The polarizing plate as claimed in claim 1 , wherein the tear strength of each of the first regions is less than 0.10 N.
5 . The polarizing plate as claimed in claim 1 , wherein the tear strength of the second region is 0.10 N or more.
6 . The polarizing plate as claimed in claim 1 , wherein, if a total width of the first retardation layer is 100%, a ratio of a width of each of the first regions to the total width of the first retardation layer is greater than 0% and less than or equal to 10%.
7 . The polarizing plate as claimed in claim 1 , wherein each of the first regions is a region having a width of 5 to 15 mm from an end portion of the first retardation layer.
8 . The polarizing plate as claimed in claim 1 , wherein the first retardation layer is a positive A-plate.
9 . The polarizing plate as claimed in claim 1 , further comprising an alignment film on a lower surface of the first retardation layer.
10 . The polarizing plate as claimed in claim 9 , wherein the alignment film comprises first portions corresponding to the first regions, and a second portion corresponding to the second region.
11 . The polarizing plate as claimed in claim 10 , wherein the first portions are portions not treated for alignment, and
the second portion is a portion treated for alignment.
12 . The polarizing plate as claimed in claim 1 , further comprising an adhesive layer laminated on a surface of the first retardation layer.
13 . The polarizing plate as claimed in claim 1 , further comprising a second retardation layer having an in-plane retardation different from an in-plane retardation of the first retardation layer at a wavelength of 550 nm.
14 . The polarizing plate as claimed in claim 13 , wherein the second retardation layer is a positive C-plate.
15 . The polarizing plate as claimed in claim 1 , further comprising a protective layer.
16 . An optical display device comprising the polarizing plate as claimed in claim 1 .