Liquid crystal display device

A liquid crystal display device, comprising:

• a liquid crystal cell having a pair of substrates and liquid crystal interposed therebetween, wherein liquid crystal molecules of said liquid crystal are oriented substantially vertically to respective surfaces of said pair of substrates;
• a pair of polarizing plates disposed so as to sandwich said liquid crystal cell therebetween, respective absorption axes of said pair of polarizing plates being orthogonal to each other;
• and
• a phase difference film, disposed between one of said pair of polarizing plates and said liquid crystal cell, said phase difference film having a biaxial anisotropy,
• wherein each of said pair of polarizing plates has a base film with an optical axis substantially vertical to said pair of substrates, said base film having a negative uniaxial anisotropy, and said phase difference film has an in-plane retardation axis crossing at right angle the absorption axis of said one of said pair of polarizing plates on the same side when seen from said liquid crystal,
• when a parameter α [nm] in relation to Rxy is:
• α=85−0.09×Rlc−Rtac/20, and
• a parameter β [nm] in relation to Rz is:
• β=1.05×Rlc−1.9×Rtac,
• where Rxy [nm] is a retardation in an in-plane direction of the phase difference film, Rz [nm] is a retardation in a thickness direction of the phase difference film, Rtac [nm] is a retardation in a thickness direction of the base films, and Rlc [nm] is a retardation in a thickness direction of the liquid crystal,
• said retardation Rxy is set to fall within a range from not less than 80% to not more than 120% of the parameter α, and said retardation Rz is set to fall within a range from not less than 60% to not more than 85% of the parameter β.

A liquid crystal display device, comprising:

• a liquid crystal cell having a pair of substrates and liquid crystal interposed therebetween, wherein liquid crystal molecules of said liquid crystal are oriented substantially vertically to respective surfaces of said pair of substrates;
• a pair of polarizing plates disposed so as to sandwich said liquid crystal cell therebetween, respective absorption axes of said pair of polarizing plates being orthogonal to each other;
• a first phase difference film, disposed between one of said pair of polarizing plates and said liquid crystal cell, said first phase difference film having a biaxial anisotropy;
• and
• a second phase difference film, disposed between the other of said pair of polarizing plates and said liquid crystal cell, said second phase difference film having a biaxial anisotropy,
• wherein each of said pair of polarizing plates has a base film with an optical axis substantially vertical to said pair of substrates, said base film having a negative uniaxial anisotropy, and each of said first and second phase difference films has an in-plane retardation axis crossing at right angle the absorption axis of said one of said pair of polarizing plates on the same side when seen from said liquid crystal;
• and
• when a parameter α [nm] in relation to Rxy is:
• α=42.5−0.045×Rlc−Rtac/40, and
• a parameter β [nm] in relation to Rz is:
• β=0.525×Rlc−0.95×Rtac,
• where Rxy [nm] is a retardation in an in-plane direction of each of said first and second phase difference films, Rz [nm] is a retardation in a thickness direction of each of said first and second phase difference films, Rtac [nm] is a retardation in a thickness direction of the base films, and Rlc [nm] is a retardation in a thickness direction of the liquid crystal,
• said retardation Rxy of said first and second phase difference films is set to fall within a range from not less than 80% to not more than 120% of the parameter α, and said retardation Rz of said first and second phase difference films is set to fall within a range from not less than 85% to not more than 90% of the parameter β.