Integrated wide viewing film
There is provided an integrated wide viewing film including: a first film having an optical axis located in-plan; and a second film having an optical axis located in a thickness direction thereof, and inclined at a predetermined angle in an in-plane direction. The IPS-LCD employing the integrated wide viewing film can be significantly improved in a contrast ratio in a diagonal direction.
1. An integrated wide viewing film comprising:
a +A-film satisfying n x >n y =n z and having an optical axis located in-plane; and
a +C-film satisfying n x =n y <n z and having an optical axis located in a thickness direction of the +C-film,
wherein the optical axis of the +C-film is, independent of any pretilt angle of liquid crystal in a liquid crystal cell, inclined at an angle of equal to or greater than −5° and less than 0°, or greater than 0° and equal to or less than +5°, with respect to a vertical direction in an in-plane direction.
2. The integrated wide viewing film of claim 1 , wherein the +A-film has an in-plane retardation of 50 nm to 150 nm at a wavelength of 550 nm, and
the +C-film has a thickness retardation of 50 nm to 250 nm at a wavelength of 550 nm.
3. The integrated wide viewing film of claim 1 , wherein the +A film has the optical axis disposed perpendicular to an absorption axis of a polarized plate adjacent to the +A film.
4. The integrated wide viewing film of claim 1 , wherein the +A film has the optical axis disposed parallel to an absorption axis of a polarized plate adjacent to the +A film.
5. The integrated wide viewing film of claim 1 , wherein the +A-film is a polymer film and the +C- film is a liquid crystal film.