申请人:Iida Toshiyuki
公开号:US20100110554A1
公开(公告)日:2010-05-06
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. R
1
and R
2
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 R
1
and R
2
are a substituted or unsubstituted aryl group, a substituted or unsubstituted vinyl group, and a substituted or unsubstituted ethynyl group.
本发明提供了一种光学膜,其表现出波长色散,使得在较短波长的一侧,延迟值较小,并且能够相对较薄地形成。本发明的光学膜是一种包括以下通用式(I)所表示的聚酰亚胺基聚合物的光学膜。在式(I)中,m为摩尔分数为40%或更多,100%或更少。R1和R2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,相应的小写字母表示其取代数。X和Y各自独立地表示键合部分,例如共价键。由R1和R2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。