Retardation film, and polarizing plate and display device using the same
US7354633B2 · kind B2 · utility
12Cited by
1References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2005 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Nov 18, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/03
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A retardation film containing a polyalcohol ester, a polycarboxylic acid ester, and a cellulose ester, wherein a total acylation degree of the cellulose ester is in the range of 2.4-2.8; and a Mw/Mn value of the cellulose ester is in the range of 1.4-3.0, provided that Mw represents a weight average molecular weight and Mn represent a number average molecular weight of the cellulose ester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.