Optical film, polarizing plate and liquid crystal display device
US9784897B2 · kind B2 · utility
1Cited by
2References
10Claims
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Key dates
| Filing date | May 29, 2015 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | May 29, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13363
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical film having a thickness of from 10 to 45 μm and containing a cellulose ester, a polyester having a recurring unit represented by the formula 1A and having a blocked terminal, and a durability improving agent for a polarizer wherein Re and Rth are from −5 to 5 nm at a wavelength of 590 nm can be used as an polarizing plate protective film and is capable of ensuring the durability of the polarizer under a high temperature and high humidity environment. X represents an acyclic divalent linking group, R represents an alkyl, alkenyl, alkynyl or aryl group, and m represents an integer of from 0 to 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.