Gas discharge lamps with glow mode electrodes
US6373185B1 · kind B1 · utility
8Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1999 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Jan 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J65/046
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flat panel lamp has internal walls forming a serpentine discharge path between two internal electrodes. Two glow mode electrodes in the form of interdigitated combs are laid on the outside of the front panel of the lamp, on top of the walls. The internal electrodes are connected to a first drive circuit; the glow mode electrodes are connected to a second drive circuit, which drives them at a frequency of about 10 MHz. At high brightness, only the internal electrodes are operative; at low brightness, only the glow mode electrodes are operative; and at intermediate brightness the two sets of electrodes are alternately energized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.