Optical stack having reflective polarizer with polymeric layers and specified reflectance and transmittance
US10754073B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2017 |
| Grant date | Aug 25, 2020 |
| Priority date | — |
| Expiry date | Nov 21, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3041
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Optical stacks including a first reflective polarizer and a partially reflective component are described. The partially reflective component may be a second reflective polarizer or a collimating reflector. The first reflective polarizer has a first average visible light reflectance for light polarized along the first block axis at normal incidence of at least 90 percent and a first average visible light transmittance for light polarized along the first pass axis at normal incidence of at least 85 percent. The second reflective polarizer has a second block axis and a second average visible light reflectance for light polarized along the second block axis at normal incidence being no more than the first average visible light reflectance minus 10 percent. The first and second block axes are not parallel and the first and second reflective polarizers have different f-ratios.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.