Patent ID: 6628359
Filing Date: 2003-09-30
Classification: G02F

Abstract:
A liquid crystal display device, comprising:a liquid crystal cell comprising a pair of substrates and a liquid crystal layer, the liquid crystal layer being sandwiched between the pair of substrates; a pair of polarizer elements sandwiching the liquid crystal cell; and two phase difference compensation elements a first phase difference compensation element being sandwiched between the liquid crystal cell and one of the pair of polarizer elements and a second phase difference compensation element being sandwiched between the liquid crystal cell and the other of the pair of polarizer elements, each of the first and second phase difference compensation elements having the slow axis in a plane parallel to a surface of the liquid crystal cell and having a layered structure of two or more uniaxial films attached to each other, the slow axis of the first phase difference compensation element being orthogonal to the absorption axis of one of the pair of polarizer elements provided on the same side with respect to the liquid crystal cell as the first phase difference compensation element, and the slow axis of the second phase difference compensation element being orthogonal to the absorption axis of one of the pair of polarizer elements provided on the same side with respect to the liquid crystal cell as the second phase difference compensation element, wherein a photoelasticity coefficient of the phase difference compensation elements is 10Ã—10âˆ’13 cm2/dyne or less, and the phase difference compensation element has three refractive indices nx, ny, and nz in directions of x, y, and z axes which are orthogonal to each other, and the refractive indices nx, ny, and nz satisfies a relationship nzyx where the nx and ny are principal refractive indices in a plane parallel to a surface of the liquid crystal cell and the nz is a principal refractive index in the thickness direction of the liquid crystal cell, and wherein the liquid crystal layer includes nematic liquid crystal material, and liquid crystal molecules of the nematic liquid crystal material are, in a black display, oriented in a direction substantially perpendicular to a surface of the pair of substrates.