OLED with buffer layer over emitting layer
US10727292B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2018 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Dec 17, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K71/135
Abstract
Discussed is an electroluminescence display apparatus for preventing the performance, efficiency, and lifetime of a device from being reduced. The electroluminescence display apparatus includes a substrate including an active area including a plurality of pixels, a circuit element layer disposed on the substrate, a first electrode disposed on the circuit element layer, an auxiliary electrode disposed on the circuit element layer and spaced apart from the first electrode, a first light emitting layer disposed on the first electrode, a buffer layer disposed on the first light emitting layer, a second light emitting layer disposed on the buffer layer and the auxiliary electrode, and a second electrode disposed on the second light emitting layer. In the electroluminescence display apparatus, since the buffer layer is formed on the first light emitting layer through an inkjet process, the buffer layer can be provided on only the first light emitting layer, and thus, the buffer layer can be formed of an organic material, thereby enhancing the device performance of a blue pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.