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    • 7. 发明申请
    • OPTICAL FILM, POLARIZING PLATE, AND LIQUID CRYSTAL DISPLAY DEVICE
    • 光学薄膜,偏光板和液晶显示装置
    • US20090237598A1
    • 2009-09-24
    • US12408152
    • 2009-03-20
    • Michio Nagai
    • Michio Nagai
    • G02F1/1347G02B5/30G02F1/13
    • G02B5/3016
    • The present invention provides an optical film including at least two optically anisotropic layers, wherein one optically anisotropic layer satisfies Expression (1) described below, the other optically anisotropic layer satisfies Expression (2) described below, and a slow axis of the one optically anisotropic layer is parallel to a slow axis of the other optically anisotropic layer, 0≦Re(450)/Re(550)≦0.5   Expression (1) 0.95≦Re(450)/Re(550)≦1.05   Expression (2) where Re (λ) represents an in-plane retardation value (unit: nm) of the corresponding optically anisotropic layer measured at a wavelength of λ nm.
    • 本发明提供一种包括至少两个光学各向异性层的光学膜,其中一个光学各向异性层满足下述表达式(1),另一个光学各向异性层满足下述表达式(2),并且一个光学各向异性层的慢轴 层间平行于另一光学各向异性层的慢轴,<?in-line-formula description =“In-line Formulas”end =“lead”?> 0 <= Re(450)/ Re(550) 0.5表达式(1)<?in-line-formula description =“In-line Formulas”end =“tail”?> <?in-line-formula description =“In-line Formulas”end =“lead”?> 0.95 <= Re(450)/ Re(550)<= 1.05表达式(2)<?in-line-formula description =“In-line Formulas”end =“tail”?>其中Re(lambda) 在波长λnm处测量的相应光学各向异性层的延迟值(单位:nm)。