Brightness enhancement film
US10001587B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 2015 |
| Grant date | Jun 19, 2018 |
| Priority date | — |
| Expiry date | Aug 22, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A brightness enhancement film including a monolithic layer and a microstructured layer adjacent the monolithic layer. The microstructured layer has a first major surface and an opposing second major surface. The first major surface includes a first plurality of microstructures and the second major surface faces the first monolithic layer. The monolithic layer includes a polyester that includes at least about 70 mole percent naphthalenedicarboxylate groups based on total carboxylate groups. The polyester may include one or more catalysts having a total concentration by weight in a range of 10 to 1000 ppm. The first monolithic layer has a thickness in the range of about 5 μm to about 300 μm. The first monolithic layer may be substantially free of non-catalyst particulate matter and may have a haze of less than 1 percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.