Title:
位相差フィルム、及びそれを用いた偏光板、液晶表示装置
Document Type and Number:
Japanese Patent JP5720687
Kind Code:
B2
Abstract:
The purpose of the present invention is to provide: a retardation film which uses a low-substituted cellulose ester and has improved retardation after saponification and improved wet heat stability of internal haze; a polarizing plate which uses the retardation film; and a liquid crystal display device. An optical film of the present invention contains a cellulose ester and a compound represented by general formula (1), and is characterized in that the compound has an average degree of substitution within the range of 3.0-6.0 and contains a component having a degree of substitution of 4 or less in an amount of 30-80% by mass (inclusive). (In the formula, R1-R8 each represents a substituted or unsubstituted alkylcarbonyl group or a substituted or unsubstituted allylcarbonyl group, and R1-R8 may be the same as or different from one another.)
Inventors:
Takashi Sera
Takagi Takagi
Inagaki Ayako
Shigeki Oka
Takagi Takagi
Inagaki Ayako
Shigeki Oka
Application Number:
JP2012530571A
Publication Date:
May 20, 2015
Filing Date:
June 23, 2011
Export Citation:
Assignee:
Konica Minolta Co., Ltd.
International Classes:
G02B5/30; C08J5/18; G02F1/1335; G02F1/13363
Domestic Patent References:
| JP2011237764A | 2011-11-24 | |||
| JP2012031313A | 2012-02-16 | |||
| JP2010031132A | 2010-02-12 |
Foreign References:
| WO2009011228A1 | 2009-01-22 | |||
| WO2009031464A1 | 2009-03-12 |
Attorney, Agent or Firm:
Gwangyang International Patent Office