Method and apparatus for continuously producing optical panel assemblies
US9023168B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2011 |
| Grant date | May 5, 2015 |
| Priority date | — |
| Expiry date | Oct 15, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1322
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of producing an optical panel assembly including the polarizing film in a continuous manner by laminating a polarizing film to a surface of a rectangular-shaped optical panel, is disclosed. The polarizing film is formed by performing a step of subjecting a laminate including a continuous web of a thermoplastic resin substrate and a PVA type resin layer formed on the substrate, to a 2-stage stretching consisting of a preliminary in-air stretching and an in-boric-acid-solution stretching, to reduce a thickness of the PVA type resin layer to 10 μm or less, and a step of causing a dichroic material to be absorbed in the PVA type resin layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.