Light source
US6777859B1 · kind B1 · utility
2Cited by
6References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 22, 2002 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Feb 22, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K3/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light source, in particular incandescent lamp, with a bulb (1), and filament (2) arranged in the bulb (1), and a heating device (3) for the filament (2), the filament (2) emitting both visible light and heat radiation, is designed and constructed with respect to a high conversion efficiency between electric power and visible light output such that the heating device (3) includes a heating element (4) for the indirect heating of the filament (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.