Color variable bipolar/AC light-emitting devices
US6235414A · kind A · utility
27Cited by
10References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1998 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Mar 11, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Color-variable light-emitting devices which are capable of generating two independent colors, even at room temperature. The devices comprise a layer of at least one active electroluminescent polymer. This electroluminescent polymer may be accompanied by one or two redox-mediating polymer layers. The redox polymer layer(s) modify the charge injection and transport properties such that the device may be operated under both forward and reverse bias.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.