Light emitting device and display apparatus including the same
US12193253B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2022 |
| Grant date | Jan 7, 2025 |
| Priority date | — |
| Expiry date | Dec 4, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/90
Abstract
A light emitting devices includes a first electrode, a hole transport region on the first electrode, a first emission layer on the hole transport region, the first emission layer to emit light of a first wavelength, a second emission layer on the hole transport region and to emit light of a second wavelength, an electron transport region on the first and second emission layers, and a second electrode on the electron transport region. The first emission layer includes a first sub-emission layer including a first hole transport host and a first sub-dopant to emit the light of the first wavelength, and a second sub-emission layer including a first electron transport and a second sub-dopant to emit the light of the first wavelength. The second emission layer includes a second hole transport host, a second electron transport host, and a second dopant to emit the light of the second wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.