Light redirecting film and method for manufacturing the same
US10642057B2 · kind B2 · utility
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9References
31Claims
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Key dates
| Filing date | Nov 21, 2017 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | Feb 24, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/4272
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light redirecting film and a method for manufacturing the same are provided. The light redirecting film comprises a substrate, a first diffraction grating layer of a first curable resin on the substrate and a second diffraction grating layer of a second curable resin on the first diffraction grating layer. Wherein the grating directions of the first diffraction grating layer and the second diffraction grating layer cross each other at an angle of 90±10°, and the difference of the refractive index of the first curable resin and the second curable resin is no less than 0.1 and no more than 0.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.