Zeon Corporation

Shuhei Okude

Shunsuke Yamanaka

Kohei Arakawa

Motohiro Itadani

Hung Trong La

A liquid crystal display device of an in-plane switching mode comprises at least optically anisotropic members (A) and (B) and a liquid crystal cell disposed between a pair of polarizers having absorption axes disposed approximately perpendicularly to each other, wherein n&#x3e;nand n&#x3e;n(n, n: refractive indices (n) in the direction of the in-plane slow axis; n, n: n in the in-plane direction perpendicular to the above direction; n, n: n in the direction of thickness, each at 550 nm); the in-plane slow axes of (A) and (B) are approximately parallel or perpendicular to each other; and the in-plane slow axis of (A) is approximately parallel or perpendicular to the absorption axis of a polarizer closer to (A). The antireflection property, scratch resistance and durability are excellent, the angle of field is wide, and uniform display of images with great contrast can be achieved at any angle of observation.

Liquid crystal display device

The present invention provides a liquid crystal display that prevents false colors and has a wide viewing angle, display screen contrast that does not decline, and excellent productivity. The liquid crystal display, comprising a liquid crystal cell, a sheet-shaped optically anisotropic body positioned on only one side of the liquid crystal cell, and a pair of light polarizers located on both sides of the liquid crystal cell, wherein the optically anisotropic body satisfies the relationship of n&#x3e;n&#x3e;nat wavelength of 550 nm, where nis in-plane refraction index of lag axis direction, nis refraction index of the direction perpendicular to the lag axis in the plane, and nis refraction index of the thickness direction; and has a local minimal value in wavelength range of 380 to 490 nm and monotonous increase in both the short wavelength and long wavelength directions from the wavelength that shows the local minimal value, in wavelength characteristics of frontal direction retardation for light in wavelength range of 380 to 780 nm.

Optically anisotropic body and liquid crystal display

A liquid crystal display device of an in-plane switching mode comprises at least an optically anisotropic member and a liquid crystal cell disposed between a pair of polarizers having absorption axes disposed approximately perpendicularly to each other, wherein n&#x3e;n&#x3e;n(n: a refractive index (n) in the direction of the in-plane slow axis; n: n in the in-plane direction perpendicular to the above direction; n: n in the direction of thickness, each at 550 nm); the optically anisotropic member comprises a layer comprising a material having a negative value of intrinsic birefringence; and the in-plane slow axis of the optically anisotropic member is approximately parallel or perpendicular to the absorption axis of a polarizer closer to the member. The antireflection property, scratch resistance and durability are excellent, the angle of field is wide, and uniform display of images with great contrast can be achieved at any angle of observation.

In-plane switching mode liquid crystal display device having a biaxial optically anisotropic member

A liquid crystal display device of an in-plane switching mode comprises at least optically anisotropic members (A) and (B) and liquid crystal cell disposed between a pair of polarizers having absorption axes disposed approximately perpendicularly to each other, wherein n&#x3e;nand n&#x3e;n(n, n:refractive indices (n) in the direction of the in-plane slow axis; n, n:n in the in-plane direction perpendicular to the above direction; n, n:n in the direction of thickness, each at 550 nm); the in-plane slow axes of (A) and (B) are approximately parallel or perpendicular to each other; and the in-plane slow axis of (A) is approximately parallel or perpendicular to the absorption axis of a polarizer closer to (A). The antireflection property, scratch resistance and durability are excellent, the angle of field is wide, and uniform display of images with great contrast can be achieved at any angle of observation.

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Yokohama, Japan

Shuhei Okude