Emissive article with light extraction film
US9799853B2 · kind B2 · utility
6Cited by
5References
24Claims
0Family size
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Key dates
| Filing date | Aug 8, 2014 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Aug 8, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An emissive article includes an OLED having a light emission surface, a circular polarizer, and a light extraction film optically between the OLED and the circular polarizer and being optically coupled to the light emission surface. The light extraction film includes a two-dimensional structured layer of extraction elements having a first index of refraction and a pitch in a range from 400 to 800 nm and a backfill layer including a material having a second index of refraction different from the first index of refraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.