Starting circuit for inverter operated gaseous discharge lamps
US4004188A · kind A · utility
23Cited by
8References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1975 |
| Grant date | Jan 18, 1977 |
| Priority date | — |
| Expiry date | Sep 26, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/3922
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement for starting a linear metal halide arc discharge lamp while in a transistor switching bridge inverter circuit in the running inverter mode. A high voltage pulse generator is connected to a trigger electrode which is arranged for capacitive coupling to the lamp to supply pulsed high voltage thereto. A synchronizing circuit serves to synchronize application of the high voltage pulse to the trigger electrode with the turn-on of either polarity of the switching inverter. An inhibit circuit prevents high voltage pulsing of the trigger electrode after lamp ionization when the lamp is in a normal operational mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.