JP2006011369A5

JP2006011369A5 -

Info

Publication number: JP2006011369A5
Application number: JP2005092131A
Authority: JP
Filing date: 2005-03-28
Publication date: 2006-02-23
Anticipated expiration: 2025-03-28

Claims

A transverse electric field type liquid crystal panel having a liquid crystal layer whose orientation orientation is changed by an electric field parallel to the substrate surface; first and second polarizing plates disposed with the liquid crystal panel sandwiched therebetween; and the first polarizing plate; In a liquid crystal display device including a first optical film disposed between the liquid crystal panels, and a second optical film disposed between the second polarizing plate and the liquid crystal panel,
The first optical film has a retardation film A1 having a relationship of nz> nx ≧ ny, an in-plane retardation (Re) of 200 to 300 nm, a relationship of nx>nz> ny, and an Nz coefficient. Including a retardation film B having a controlled three-dimensional refractive index such that satisfies 0.3 <Nz <0.7,
The second optical film includes a retardation film A2 having a relationship of nz> nx ≧ ny,
And, Ri absorption axis parallel or perpendicular der slow axis and the first and second polarizer retardation film B,
The first polarizing plate and the second polarizing plate both have protective films on both sides of the polarizer ,
The thickness direction retardation (Rth ₁ ) of the protective film on the liquid crystal panel side of the first polarizing plate and the thickness direction retardation (Rth ₂ ) of the retardation film A1 are:
_{_{0 ≦ || Rth 1 || Rth 2}} || ≦ 15nm, satisfied, One or,
The thickness direction retardation (Rth ₃ ) of the protective film on the liquid crystal panel side of the second polarizing plate and the thickness direction retardation (Rth ₄ ) of the retardation film A2 are:
_{_{0 ≦ || Rth 3 || Rth 4}} || ≦ 15nm, liquid crystal display device comprising that you satisfied.
However, the above film, the X-axis plane refractive index in the film plane is maximum, Y-axis and a direction perpendicular to the X-axis, a thickness direction and Z-axis of the film, the respective axial 590 When the refractive index at nm is nx, ny, nz and the film thickness is d (nm),
In-plane retardation (Re) = (nx−ny) × d,
Nz = (nx−nz) / (nx−ny),
Thickness direction retardation (Rth) = (nx−nz) × d .

The thickness direction retardation of the retardation film A1 (Rth ₂₎ and the thickness direction retardation of the retardation film A2 is (Rth _4), a liquid crystal display device according to claim 1, characterized in that the -10 to-150 nm.

3. The liquid crystal display device according to claim 1, wherein the retardation film A1 and / or the retardation film A2 includes a liquid crystal polymer fixed in homeotropic alignment.

The first polarizing plate and the second polarizing plate both have protective films on both sides of the polarizer,
The slow axis of the protective film on the liquid crystal panel side of the first polarizing plate and the absorption axis of the first polarizing plate are parallel or perpendicular,
The liquid crystal display according to any one of claims 1 to 3 , wherein the slow axis of the protective film on the liquid crystal panel side of the second polarizing plate and the absorption axis of the second polarizing plate are parallel or perpendicular. apparatus.

The first optical film, a liquid crystal display device according to any one of claims 1 to 4, characterized in that it is laminated from the first polarizer side retardation film A1, the order of the retardation film B.