Light emitting device
US7332858B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2004 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Mar 20, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting element containing an organic compound has a defect that the light emitting element is easily deteriorated by various factors; therefore, it is the biggest issue of the light emitting element that the light emitting element is formed with high reliability (longer lifetime). An objective of the present invention is to reduce or eliminate generation of the above described various defective modes of the light emitting element containing an organic compound. According to the present invention, current efficiency-luminance characteristics can be improved by orienting organic compound molecules in an applying direction of current. In addition, deterioration can be prevented by using a crystallization inhibitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.