Integrated wide viewing film and in-plane switching liquid crystal display with the same
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 −B 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 thereof, and inclined at a predetermined angle in an in-plane direction, and
wherein the -B film has an in-plane retardation value of 50 to 150 nm and a thickness retardation value of −50 to −200 nm at a wavelength of 550 nm, and the +C film has a thickness retardation value of 50 nm to 250 nm at a wavelength of 550 nm.
2. The integrated wide viewing film of claim 1 , wherein the +C film has the optical axis inclined at an angle of −5° to +5° with respect to a vertical direction.
3. The integrated wide viewing film of claim 1 , wherein the −B film is a polymer film and the +C film is a liquid crystal film.