OLEDs with improved light extraction using enhanced guided mode coupling
US9933587B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2015 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Jan 21, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K50/854
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An organic light emitting diode (OLED) device having enhanced light extraction is disclosed. The OLED device includes an upper waveguide structure having an organic layer and supports first guided modes, and a lower waveguide structure with a light-extraction waveguide that supports second guided modes substantially matched to the first guided modes. The lower waveguide structure includes a light-extraction waveguide interfaced with a light-extraction matrix. The light-extraction waveguide includes one or more light-redirecting features. The upper and lower waveguide structures are configured to facilitate mode coupling from the first guided modes to the second guide modes while substantially avoiding coupling the first guided modes to surface plasmon polaritons. The light traveling in the second guided modes is redirected to exit the OLED device by light-redirecting features of the light-extraction waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.