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    • 13. 发明授权
    • Optical film and image display device
    • 光学胶片和图像显示装置
    • US08722842B2
    • 2014-05-13
    • US12595133
    • 2008-04-03
    • Toshiyuki IidaYutaka OhmoriMiyuki Kurogi
    • Toshiyuki IidaYutaka OhmoriMiyuki Kurogi
    • C08G73/00
    • G02B5/3083C08G73/10C08G73/1039C08G73/1042C08G73/1067C08G73/12C08G73/123C08G73/126C08J5/18C08J2379/08C08L79/085G02B1/04G02F1/133634G02F2001/133637Y10T428/31721C08L79/08
    • The present invention provides an optical film exhibiting wavelength dispersion such that a retardation value is smaller on the shorter wavelength side, and capable of being also formed comparatively thinly.The optical film of the present invention is an optical film including a polyimide-based polymer represented by the following general formula (I).In the formula (I), m is 40% by mol or more and 100% by mol or less. R1 and R2 each independently denote a substituent having a carbon-carbon double bond or a triple bond. A, A′, B, B′, E, G, and H each denote a substituent, and small letters corresponding to these alphabets denote substitution number thereof. X and Y each independently denote bond part such as a covalent bond. The substituents having a carbon-carbon double bond or a triple bond represented by R1 and R2 are a substituted or unsubstituted aryl group, a substituted or unsubstituted vinyl group, and a substituted or unsubstituted ethynyl group.
    • 本发明提供一种表现波长色散的光学膜,使得在较短波长侧的延迟值较小,并且还能够相对较薄地形成。 本发明的光学膜是包含由以下通式(I)表示的聚酰亚胺类聚合物的光学膜。 式(I)中,m为40摩尔%以上且100摩尔%以下。 R 1和R 2各自独立地表示具有碳 - 碳双键或三键的取代基。 A,A',B,B',E,G和H各自表示取代基,对应于这些字母的小写字母表示取代数。 X和Y各自独立地表示诸如共价键的键合部分。 由R 1和R 2表示的具有碳 - 碳双键或三键的取代基是取代或未取代的芳基,取代或未取代的乙烯基和取代或未取代的乙炔基。