Hella Kgaa Hueck and Company

Induperm A/s

Bernhard Rupprath

Klaus-Peter Schmitz

Nikolaus Decius

Bjorn Abel

Adam Baran

An adapter circuit for connecting a switching circuit of an airport visual aid is equipped with an LED as a light source and a secondary-side coil (secondary side) of a supply transformer, wherein at least one switch element is provided for selectively making or breaking the connection and wherein at least one trigger circuit is provided for actuating the switch element when a specified voltage level is exceeded, wherein the switch element is provided between the trigger circuit and the secondary side of the supply transformer and/or the trigger circuit is connected to the switch contact and to the switching circuit of the LED airport visual aid.

Adapter circuit

A method for driving a LED-airfield light by a controller, being at least connected two LED-modules, wherein the LED-moduleseach comprise a memory, permits to drive the LEDs at equal luminosity if the method comprises at least the steps of storing status information about each LED-moduleon the respective LED-module, reading the status information by the controllerand determining driving parameters for a first LED-moduleof the at least two LED-modules, considering the status information about at least one second LED-module

LED-airfield light

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 () 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 (). 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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Lippstadt, Germany

Bernhard Rupprath