Discharge lamp device
US4434385A · kind A · utility
13Cited by
7References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1981 |
| Grant date | Feb 28, 1984 |
| Priority date | — |
| Expiry date | Jun 23, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A discharge lamp device wherein discharging zone within a tubular discharge lamp is caused to exist as selectively biased with respect to the axis of the lamp to render the light distributing characteristic non-uniform in the circumferential direction of the lamp and, utilizing such biased discharging zone, a light of selective color or color tone dependent on a color or color tone determining material disposed along the biased zone is provided. The discharging zone biasing is realized specifically preferably by an electromagnetic means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.