Polarizing plate with built-in viewing angle compensation film and IPS-LCD comprising same
There is provided a polarizer integrally containing view angle compensating film used in an in-plane switching liquid crystal display (IPS-LCD) filled with liquid crystal (Δ∈>0) having positive dielectric anisotropy and an in-plane switching liquid crystal display comprising the same. More particularly, there is provided an integrated polarizer capable of being used to manufacture a thin polarizer and securing a good view angle by employing a view angle compensating film as a protective film of a polarizing film forming the polarizer and an IPS-LCD comprising the same. The integrated polarizer comprises a polarizing film; a protective film attached to one surface of the polarizing film; and a +A plate coated with a +C plate attached to the other surface of the polarizing film. The +C plate is coated in the form of liquid crystals.
1. An in-plane switching liquid crystal display (IPS-LCD) comprising;
a first polarizing plate,
a second polarizing plate,
a horizontally oriented IPS panel disposed between the first and the second polarizing plates and filled with a liquid crystal having positive dielectric constant anisotropy (Δ∈>0),
in which an absorption axis of the first polarizing plate and an absorption axis of the second polarizing plate are orthogonal to each other, and an optical axis of the liquid crystal in the IPS panel and the absorption axis of the first polarizing plate are parallel with each other,
wherein the second polarizing plate is an integrated polarizer comprising:
a polarizing film;
a protective film attached to one surface of the polarizing film; and
a +A plate coated with a +C plate in the form of liquid crystals, the +C plate being attached to the other surface of the polarizing film to which the protective film is attached,
wherein the +A plate coated with the +C plate in the integrated polarizer is disposed on the side of the IPS panel, and
wherein a retardation film is not included between the first polarizing plate and the IPS panel.
2. The IPS-LCD of claim 1 , wherein the +A plate has an in-plane phase retardation value of 30 to 500 nm.
3. The IPS-LCD of claim 1 , wherein the +C plate has a thickness-direction phase retardation value of 60 to 100 nm.
4. The IPS-LCD of claim 1 , wherein the +A plate coated with the +C plate in the form of liquid crystals has Nz (|1-R th /R in |) of 0.15 to 0.5.