Organic light emitting display device (OLED) having p-type charge generation layer (CGL) formed between emissions stack
US10950812B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2016 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Jun 24, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/351
Abstract
Discussed is an organic light emitting display device. The organic light emitting display device can include a first emission part, a second emission part on the first emission part, and a first P-type charge generation layer between the first emission part and the second emission part. The first emission part includes a first hole transport layer, a first emission layer, and a first electron transport layer. The second emission part includes a second hole transport layer, a second emission layer, and a second electron transport layer. The second hole transport layer and the first P-type charge generation layer are disposed adjacent to each other. The second hole transport layer includes a first material and a second material. The first material has an absolute value of a HOMO energy level which can be greater than an absolute value of a LUMO energy level of the first P-type charge generation layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.