发明名称 |
Optical compensation film, viewing angle compensation integral type polarizing plate and liquid crystal display apparatus |
摘要 |
An optical compensation film comprising a cellulose ester film is disclosed. In the film, (a) each of photoelastic coefficient C(md) in a mechanical direction and photoelastic coefficient C(td) in the transverse direction of the cellulose ester film is 1x10<SUP>-9 </SUP>to 1x10<SUP>-13 </SUP>Pa<SUP>-1 </SUP>and C(md)<C(td), (b) retardation R<SUB>0 </SUB>within the plane of the cellulose film defined by Formula (I) is 20 to 70 nm, (c) retardation R<SUB>t </SUB>of the cellulose ester film in a thickness direction, defined by Formula (II) is 70 to 400 nm, and (d) both of a dimensional variation ratio S(md) in the mechanical direction and a dimensional variation ratio S(td) in the transverse direction of the cellulose ester film prior to and after being allowed to stand at ambient conditions of 80° C. and 90 percent relative humidity for 50 hours are -1 to 1 percent, |S(md)|>|S(td)|, and C(td)x|S(td)|<C(md)x|S(md)|.
|
申请公布号 |
US7105213(B2) |
申请公布日期 |
2006.09.12 |
申请号 |
US20050079575 |
申请日期 |
2005.03.14 |
申请人 |
KONICA MINOLTA HOLDINGS, INC |
发明人 |
TASAKA KOJI;YAJIMA TAKATOSHI;KUZUHARA NORIYASU;UMEDA HIROKI |
分类号 |
G02F1/1335;C09K19/32;G02B5/30;G02F1/1333 |
主分类号 |
G02F1/1335 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|