Optical resin film and polarizing film and liquid crystal display device using the same
AssigneeFUJIFILM Corporation
InventorsYoichi Maruyama, Yukito Saitoh, Yoshiaki Hisakado, Susumu Sugiyama
Life of this patent
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Abstract
An optical resin film, which has Re (λ) and Rth (λ) satisfying retardation requirements (A) to (D), and has an in-plane width direction retardation (Re) variation coefficient of 5% or less and a thickness direction retardation (Rth) variation coefficient of 10% or less: (A) 0.1<Re (450)/Re (550)<0.95 (B) 1.03<Re (650)/Re (550)<1.93 (C) 0.4<(Re/Rth (450))/(Re/Rth (550)))<0.95 (D) 1.05<(Re/Rth (650)/(Re/Rth (550))<1.9, and a polarizing plate and a liquid crystal display device using the optical resin film.
Claims8
An optical resin film, which has Re (λ) and Rth (λ) satisfying retardation requirements (A) to (D), and has an in-plane width direction retardation (Re) variation coefficient of 5% or less and a thickness direction retardation (Rth) variation coefficient of 10% or less:
- (A) 0.1<Re (450)/Re (550)<0.95
- (B) 1.03<Re (650)/Re (550)<1.93
- (C) 0.4<(Re/Rth (450))/(Re/Rth (550)))<0.95
- (D) 1.05<(Re/Rth (650)/(Re/Rth (550))<1.9
- wherein Re (λ) represents an in-plane retardation value of the optical resin film with respect to light having a wavelength of λ nm;
- Rth (λ) represents a thickness direction retardation value of the optical resin film with respect to light having a wavelength of λ nm;
- and
- Re/Rth (λ) represents a ratio of an in-plane retardation value to a thickness direction retardation value of the optical resin film with respect to light having a wavelength of λ nm (unit:
- nm).
Dependencies are inferred from the claim text.