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    • 4. 发明申请
    • Optical film, production method of optical film, polarizing plate and liquid crystal display device
    • 光学膜,光学膜的制造方法,偏光板和液晶显示装置
    • US20080049323A1
    • 2008-02-28
    • US11878766
    • 2007-07-26
    • Susumu SugiyamaKunihiro AtsumiHajime Nakayama
    • Susumu SugiyamaKunihiro AtsumiHajime Nakayama
    • G02B5/30B29D11/00G02F1/1335
    • G02B5/3083B29D11/0074G02F1/13363Y10T428/1041
    • An optical film includes at least one kind of humidity dependency improver that improves ΔRe, wherein the optical film has a ratio of Re/Rth which is larger as a wavelength is longer in the visible wavelength region; and Re which is larger as a wavelength is longer in the visible wavelength region, wherein Re represents an in-plane retardation (unit: nm) of the optical film; Rth represents a retardation (unit: nm) in a thickness direction of the optical film; and ΔRe represents a humidity dependency of Re defined by the following formula (1): ΔRe=|Re(550)10%RH−Re(550)80%RH|,:   Formula (1) wherein Re(550)10%RH represents Re at a wavelength of 550 nm, at a temperature of 25° C. and at a relative humidity of 10%; and Re(550)80%RH represents Re at a wavelength of 550 nm, at a temperature of 25° C. and at a relative humidity of 80%.
    • 一种光学膜包括至少一种改善DeltaRe的湿度依赖性改进剂,其中该光学膜具有在可见波长区域中波长较长的Re / Rth比; 并且在可见光波长区域中作为波长较大的Re较大,其中Re表示光学膜的面内延迟(单位:nm); Rth表示光学膜的厚度方向的延迟(单位:nm) DeltaRe表示由以下公式(1)定义的Re的湿度依赖性:<?in-line-formula description =“In-line Formulas”end =“lead”?> DeltaRe = | Re(550)10% Re(550)80%RH |,:式(1)<?in-line-formula description =“In-line formula”end =“tail”?>其中Re(550)10%RH表示波长为 550nm,温度25℃,相对湿度10%; Re(550)80%RH表示在波长550nm,温度25℃,相对湿度80%的Re。