Gas discharge tube capable of lighting in different colors
US5132590A · kind A · utility
2Cited by
9References
2Claims
0Family size
Inventors
Key dates
| Filing date | Oct 17, 1990 |
| Grant date | Jul 21, 1992 |
| Priority date | — |
| Expiry date | Oct 17, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/72
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A gas discharge tube that is capable of lighting in different colors. The gas discharge tube, which may contain neon and mercury vapor, and which has its inner surface coated with a photoluminescent layer, is energized with a pulse current. The resultant color of the light emitted from the gas discharge tube depends on the combination of the pulse shapes and duty factors constituting the pulse current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.