Ultra-thin broadband retardation film
US10520654B2 · kind B2 · utility
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Key dates
| Filing date | Jul 13, 2017 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Oct 13, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An ultra-thin broadband retardation film is provided. The broadband retardation film includes a first retardation film and a second retardation film. The second retardation film is disposed on a side of the first retardation film, wherein an in-plane retardation value Ro of the first retardation film is between 70 nm and 130 nm, an in-plane retardation value Ro of the second retardation film is between 140 nm and 260 nm, and an angle between an optic axis of the first retardation film and an optic axis of the second retardation film is between 35° and 70°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.