Optical film
US7119959B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2004 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Mar 28, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/896
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film for optical applications which effectively prevents reflection of light on the surface of image display devices such as PDP, CRT and LCD, exhibits excellent scratch resistance and transmission of light, provides excellent adhesion between layers and can be produced at a low cost is disclosed. The film comprises (A) a high refractivity hard coat layer (the refractive index: 1.60 to 1.75, the thickness: 2 to 20 μm) comprising (a) an antimony-doped tin oxide having a needle shape (the average particle diameter along the major axis: 0.05 to 10 μm, the average aspect ratio: 3 to 100), (b) at least one other metal oxide and (c) a material cured with an ionizing radiation and (B) a low refractivity layer (the refractive index: 1.30 to 1.45, the thickness: 40 to 200 nm), which are successively laminated at least on one face of a substrate film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.