Circuit arrangement for starting a high-pressure gas discharge l

Details Circuit arrangement for starting a high-pressure gas discharge l Circuit arrangement for starting a high-pressure gas discharge l

1988-08-29

1990-06-26

Mis, David

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315291, 315DIG7, H05B 4136

Patent

active

049375016

ABSTRACT:
In a circuit arrangement for starting and operating a high-pressure gas discharge lamp (8) by means of a voltage converter comprising at least one semiconductor switch (5, 6), which can be switched periodically to the conductive and to the non-conductive state by a control unit (32, 33, 34) in such a manner that the lamp receives a pulsatory supply current having an operating duty cycle between 0.1 and 0.7, the control unit (32, 33, 34) switches the semiconductor switch (5, 6) upon starting of the lamp (8) in such a manner that the duty cycle upon starting (starting duty cycle) is increased with respect to the operating duty cycle.

REFERENCES:
patent: 4128789 (1978-12-01), Owen

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