Circuit arrangement for the operation of a fluorescent lamp
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United States of America Patent
Stats
-
Dec 29, 1992
Grant Date -
N/A
app pub date -
Jul 23, 1991
filing date -
Aug 16, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit arrangement for the operation of a fluorescent lamp which is connectable to an alternating-current power supply, for example, the elctrical power supply on board an aircraft, including a switch which is located between the lamp electrodes, and which is actuatable through the intermediary of a control circuit whereby the lamp electrodes are heated when the switch is closed. A measuring element which is connected to the input of the control circuit determines the decreasing voltage at least at one of the lamp electrodes, and the control circuit will open the switch for the ignition of the fluorescent lamp only when the determined voltage is essentially constant, or has reached a threshold value.
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