申请人:Uehira Shigeki
公开号:US20090159857A1
公开(公告)日:2009-06-25
An optical film, which has been subjected to an orientation treatment, containing a low-molecular weight compound, in which a birefringence Δn(550 nm) is larger than zero (0) in an orientation direction, and the optical film satisfies the following expressions (1) and (2); and a phase difference plate, a polarizing plate and a liquid crystal display using the same:
0.5<Δ
n
(450 nm)/Δ
n
(550 nm)<1.0; and Expression (1)
1.05<Δ
n
(630 nm)/Δ
n
(550 nm)<1.5. Expression (2)