发明授权
US07153547B2 Birefringent optical film, elliptically polarizing plate using the same, and liquid crystal display using the same 有权
双折射光学膜,使用其的椭圆偏光板和使用其的液晶显示器

Birefringent optical film, elliptically polarizing plate using the same, and liquid crystal display using the same
摘要:
The present invention provides a birefringent optical film having a high orientation for easily obtaining a desired retardation value and also a small photoelastic coefficient. The birefringent optical film includes at least two kinds of polymer materials. A total of products of Cn and Wn satisfies a numerical formula (1): Σ(Cn×Wn)≦30×10−8 cm2/N  (1) where Cn and Wn denote respectively a photoelastic coefficient and a volume fraction of each polymer material, and at least one of the polymer materials of the film has a photoelastic coefficient value of at least 60×10−8 cm2/N.
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