Phase retarder film
US5888634A · kind A · utility
10Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Apr 25, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31507
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a phase retarder film made of a thermoplastic resin having an in-plane retardation of 50 to 300 nm and a ratio of the in-plane retardation to the retardation normal to the plane of not less than 0.5, but not more than 1.8, a process for the production thereof and a laminate phase retarder film using said phase retarder film above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.