Method for the pulsed mode of operation of high-pressure dischar

Details Method for the pulsed mode of operation of high-pressure dischar Method for the pulsed mode of operation of high-pressure dischar

1991-02-26

1994-06-21

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

315175, H05B 4116

Patent

active

053230892

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.

REFERENCES:
patent: 4412155 (1983-10-01), Isaka
patent: 4652797 (1987-03-01), Nilssen
patent: 4963796 (1990-10-01), Gottschling

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