Lighting device comprising plurality of light emitting layers
US11329242B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2020 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Jul 23, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/351
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A lighting device comprises a substrate including an active area; a first electrode disposed on the substrate and including a transparent conductive material; an organic material layer disposed on the first electrode and including a first light emitting layer and a second light emitting layer; and a second electrode disposed on the organic material layer and including a reflective material, wherein the first light emitting layer emits light having a first wavelength and the second light emitting layer emits light having a second wavelength, and wherein the second light emitting layer includes a first dopant absorbing the light having the first wavelength and emitting the light having the second wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.