OLED light extraction film with multi-periodic zones of nanostructures
US8659221B2 · kind B2 · utility
21Cited by
4References
11Claims
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Key dates
| Filing date | Aug 26, 2011 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Feb 14, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K50/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light extraction film having multi-periodic zones of engineered nanostructures. The light extraction film includes a flexible substrate, a layer of low index engineered nanostructures applied to the substrate, and a high index backfill layer applied over the nanostructures. The multi-periodic zones include a repeating zone of the nanostructures having multi-periodic characteristics. The repeating zone includes first and second sets of nanostructures having different periodic pitches. The multi-periodic zones can be used to enhance the light output and tune the angular luminosity of organic light emitting diode devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.