Lighting device for identifying and marking traffic areas of airports
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United States of America Patent
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Apr 21, 2015
Grant Date -
Mar 13, 2014
app pub date -
Aug 27, 2012
filing date -
Mar 1, 2010
priority date (Note) -
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Abstract
A lighting device, capable of identifying and marking traffic areas of airports, comprises at least one semiconductor lamp and an electronic control circuit, which is connectable to an electrical AC supply network with constant current feed. For controlling the operation of the semiconductor lamp, the control circuit has a rectifier, which is connectable without a transformer to the electrical AC supply network. It further has an internal power supply, which is connected to the rectifier, for supplying the semiconductor lamp with an electric direct current. Furthermore, the voltage supply device (3) having electronic power factor correction means, by means of which voltage and current can be kept in phase in all operating states of the lighting device (1). It furthermore re-adjusts the input voltage from the electrical AC supply network to allow the current predefined on the AC supply network to flow in the event of a small power demand of the electronic control circuit.
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