Fluorescence-reddening membrane and red-emitting device
US6221517A · kind A · utility
12Cited by
2References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1998 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Aug 7, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a fluorescence-reddening membrane which is made up of a light-transmittable medium and, dispersed therein, (a) a rhodamine base fluorescence pigment and (b) a fluorescence pigment which has absorptions in the blue region and induces energy transfer to and reabsorptions from the rhodamine base fluorescence lamp at high conversion effieciencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.