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    • 9. 发明授权
    • Optical phase retardation film
    • 光学相位延迟膜
    • US5550661A
    • 1996-08-27
    • US153114
    • 1993-11-15
    • Terri R. ClarkThomas C. Long
    • Terri R. ClarkThomas C. Long
    • G02B1/04G02B5/30G02F1/13363G02F1/1335
    • G02B5/3083G02B1/04G02F1/133634
    • The present invention provides an optical phase retardation film comprising a polymer comprising at least about 40 percent by weight chlorotrifluoroethylene. The present invention also provides an optical phase retardation film comprising a halogen-containing polymer wherein: (a) the film has refractive indices n.sub.x, n.sub.y, and n.sub.z associated with its axes x, y, and z: (b) the x and y axes are in the plane of the film and perpendicular to each other; (c) the z axis is perpendicular to the plane of the film; and (d) n.sub.x .gtoreq.n.sub.y >n.sub.z. The optical phase retardation film is useful in a liquid crystal display device. The present invention also provides a liquid crystal display device comprising: (a) a first polarizer; (b) liquid crystal cell having transparent electrodes; (c) an optical phase retardation film comprising a polymer comprising at least about 40 percent by weight chlorotrifluoroethylene; and (d) a second polarizer wherein the liquid crystal cell and optical phase retardation film are located between the first and second polarizers.
    • 本发明提供一种光学相位延迟膜,其包含含有至少约40重量%氯三氟乙烯的聚合物。 本发明还提供一种包含含卤聚合物的光学相位延迟膜,其中:(a)该膜具有与其轴线x,y和z相关联的折射率nx,ny和nz:(b)x和y 轴位于膜的平面中并且彼此垂直; (c)z轴垂直于膜的平面; 和(d)nx> / = ny> nz。 光学相位延迟膜在液晶显示装置中是有用的。 本发明还提供一种液晶显示装置,包括:(a)第一偏振器; (b)具有透明电极的液晶单元; (c)光学相位延迟膜,其包含含有至少约40重量%氯三氟乙烯的聚合物; 和(d)第二偏振器,其中液晶单元和光学相位延迟膜位于第一和第二偏振器之间。