Organic EL display element having optical stack
US9588271B2 · kind B2 · utility
4Cited by
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29Claims
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Key dates
| Filing date | Sep 12, 2014 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Mar 13, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133638
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An organic EL display device includes at least a polarizer layer, a λ/2 plate, a λ/4 plate and an organic EL panel in this order, and an in-plane retardation Re2(550) of the λ/4 plate at 550 nm satisfies 115≦Re2(550)≦155, and an in-plane retardation Re1(550) of the λ/2 plate at 550 nm satisfies Re1(550)=2×Re2(550)±50 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.