Diehl Aerospace Gmbh

Steffen Bachmaier

Martin Bachhuber

Nicolaus Kangarakis

Catharina Sauer

Matthias Brinkmann

Jan Petersohn

An illumination apparatus having a first illumination unit and a second illumination unit is provided. Each illumination unit has an LED arrangement and a supply device. Each LED arrangement has at least one LED group having a multiplicity of LEDs. A control device for driving the at least two illumination units with a common nominal dim drive value is included. The nominal dim drive value drives the illumination units in such a way that the similar LED groups of the illumination units are operated in a dim mode. The apparatus also has an offset device, which is formed to derive an absolute dim drive value for each of the similar LED groups from the nominal dim drive value with an offset value. The offset value is selectively assigned to the LED group and selected, such that the LED group is activated by the absolute dim drive value.

Illumination apparatus and method for operating the illumination apparatus in a dim mode

A flat light for aircraft cabins is provided. The flat light has a light box and a light source, the light of which is coupled into the light box. A rear wall of the light box is formed to be reflective and the front wall of the light box has optical elements for directional emission of light.

Flat light, in particular for aircraft cabins

In order to register the order of bus subscribers () when starting a system without the use of a token line to be specifically laid for his purpose along the two-wire bus (), the bus master () temporarily activates a reflective discontinuity, preferably a bus short circuit, in a respective selectively addressed one of the subscribers () after stochastically determining all subscriber addresses (Ki). The echo signal () of a voltage jump (), which is then output onto the bus () by the master (), is superimposed in the master () to form a square-wave-like differential signal () whose pulse duration which is proportional to the distance between the master () and that subscriber () along the bus () is measured following pulse shaping by analog pulse area integration ().

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Nuremberg, Germany

Steffen Bachmaier