Polarizing film, optical film laminate comprising polarizing film, and stretched laminate for manufacturing the same
US8314987B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2011 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Oct 27, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polarizing film includes a polyvinyl alcohol (PVA) type resin having a dichroic material impregnated therein. The polarizing film is formed by stretching the PVA type resin, such that the thickness of the polarizing film is decreased to 10 μm or less, and. The polarizing film has optical properties which satisfy conditions represented by formulae:P>−(100.929T-42.4−1)×100 (where T<42.3); andP≧99.9 (where T≧42.3)where T represents a single layer transmittance and P a polarization rate. The polarizing film can be made by providing a laminate comprising a PVA type resin layer formed on a non-crystallizable ester type thermoplastic resin substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.