Electrodeless discharge lamp
US5013975A · kind A · utility
19Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1989 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | Nov 21, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J65/048
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrodeless discharge lamp includes a lamp tube coated on inner surface with a fluorescent material and filled with mercury vapor and a rare gas where the gas provides an excitation luminescence of the same series of color as luminous color of the fluorescent material. The gas and vapor in the tube effectively maintain the luminescence of the lamp over a wide ambient temperature range where the rare gas provides luminescence of a selected color at lower temperatures and the mercury vapor and fluorescent material provide luminescence of the same color in the middle and higher temperature ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.