Electroluminescent elements
US6921589B2 · kind B2 · utility
8Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2002 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Aug 5, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to an electroluminescent element formed by placing a luminescing substance between an anode and a cathode, such that when electrical energy is applied to the element, light is emitted having a peak wavelength of at least 580 nm. The luminescing substance comprises a fluorescent compound have a fluorescent maximum at about 540 nm or above and a compound having a pyrromethene structure (I) or metal complexes thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.