Method for the pulsed mode of operation of high-pressure discharge lamps
US5323089A · kind A · utility
0Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1991 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Feb 26, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a method for operating high-pressure discharge lamps in a pulsed mode to improve the light properties thereof, gating pulses for the high-pressure discharge lamp are in the form of pulse groups of bipolar individual pulses with a pulse width of less than 100 .mu.s. The repetition frequency of the pulse groups is higher than 100 Hz at a duty cycle of less than 0.8 and the individual pulses have a frequency of more than 400 Hz at an arbitrary duty cycle. A sinusoidal keep alive current or direct current is applied to the lamp between the pulse groups. The individual pulses can be spike pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.