| 发明名称 |
OPTICAL FILM, POLARIZER AND LIQUID CRYSTAL DISPLAY DEVICE |
| 摘要 |
An optical film, has a film thickness of 15 μm to 45 μm, Rth (440 W, 30% RH) and “Rth (440 W, 30% RH)−Rth (440 W, 80% RH)” of the optical film satisfy Expression (1) −20 nm≦Rth (440 W, 30% RH)≦5 nm and Expression (2) 0 nm≦Rth (440 W, 30% RH)−RH (440 W, 80% RH)≦18 nm, here, in Expressions (1) and (2), Rth (440 W, 30% RH) represents a retardation value in a film thickness direction at a wavelength of 440 nm measured at 25° C. and at a relative humidity of 30% and Rth (440 W, 80% RH) represents a retardation value in the film thickness direction at a wavelength of 440 nm measured at 25° C. and at a relative humidity of 80%; a polarizer and liquid crystal display device. |
| 申请公布号 |
US2015055062(A1) |
申请公布日期 |
2015.02.26 |
| 申请号 |
US201414537376 |
申请日期 |
2014.11.10 |
| 申请人 |
FUJIFILM Corporation |
发明人 |
HISAKADO Yoshiaki;NAGURA Masato;NOGUCHI Jun;HISANAGA Kazuya;FUKAGAWA Nobutaka;NAITO Yu;FURUKAWA Hiromichi |
| 分类号 |
G02B5/30;G02F1/1343;G02B1/08;G02F1/1335 |
主分类号 |
G02B5/30 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. An optical film,
wherein a film thickness is in a range of 15 μm to 45 μm, Rth (440 W, 30% RH) and “Rth (440 W, 30% RH)−Rth (440 W, 80% RH)” of the optical film to which a wet-heat treatment is applied at 60° C. and at a relative humidity of 90% for 48 hours satisfy the following expressions (1) and (2), and a dimensional change rate of the film to which a treatment is applied at 60° C. and at a relative humidity of 90% for 24 hours is ±0.3% or less;
−20 nm≦Rth(440 W,30% RH)≦5 nm Expression (1)0 nm≦Rth(440 W,30% RH)−RH(440 W,80% RH)≦18 nm, Expression (2)here, in Expressions (1) and (2), Rth (440 W, 30% RH) represents a retardation value in a film thickness direction at a wavelength of 440 nm measured at 25° C. and at a relative humidity of 30% and Rth (440 W, 80% RH) represents a retardation value in the film thickness direction at a wavelength of 440 nm measured at 25° C. and at a relative humidity of 80%. |
| 地址 |
Tokyo JP |
