公开(公告)号：US4984874A

公开(公告)日：1991-01-15

申请号：US376653

申请日：1989-07-07

申请人： Tomiaki Yamamoto ,  Akio Murayama ,  Susumu Kondo ,  Hitoshi Hato ,  Shinichi Kamagami ,  Shoichi Matsumoto

发明人： Tomiaki Yamamoto ,  Akio Murayama ,  Susumu Kondo ,  Hitoshi Hato ,  Shinichi Kamagami ,  Shoichi Matsumoto

IPC分类号： G02F1/13363

CPC分类号： G02F1/13363 ,  G02F2202/40 ,  G02F2413/02 ,  G02F2413/08

摘要： A liquid crystal cell includes first and second substrates arranged to oppose each other, first and second electrodes formed on opposing surfaces of the first and second substrates, respectively, and a liquid crystal composition filled between the first and second substrates and arranged in a twisted mode. First and second polarizers are arranged on both sides of the liquid crystal cell. A first optical retardation film is arranged between the first substrate and the first polarizer, and a second optical retardation film is arranged between said second substrate and said second polarizer. The liquid crystal cell has a retardation value R0 of 0.4 to 0.85 .mu.m, defined by an equation:.DELTA.n.multidot.d.multidot.cos.sup.2 .theta.where d is a distance between the first and second substrates, .DELTA.n is an optical anisotropy of the liquid crystal composition and .theta. is a tilt angle of the liquid crystal composition.