Discharge lamp having multiple constrictions
US4825125A · kind A · utility
13Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1987 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Nov 2, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A low pressure discharge lamp, particularly a compact fluorescent lamp, having a plurality of constricting portions axially spaced apart and extending about the circular periphery of the envelope. The constricting portions, which include defined end segments projecting within the envelope, constrict the plasma discharge and spatially separate at least one of the discharge processes occurring within the plasma discharge and cause the separated process to take place in a different portion within the envelope so that the conditions for energy input and energy dissipation may be independently optimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.