Continental Automotive Gmbh

Wolfgang Koellner

Aurel-Vasile Neic

Maximilian Austerer

Philipp Brejcha

The disclosure relates to a circuit apparatus for controlling a switchable glazing unit. The circuit apparatus has a potential-isolated circuit part configured to generate a periodically alternating drive voltage which has a predetermined first period duration on the glazing unit. The disclosure provides a voltage source, to which the potential-isolated circuit part is connected via a transformer and which is configured to operate the transformer with an AC voltage which has a second period duration shorter than the first period duration, wherein the potential-isolated circuit part is configured to receive the transformed AC voltage from the transformer and, in repeatedly alternating switching phases, to respectively forward only positive half-cycles of the transformed AC voltage to an electrical capacitance of the glazing unit and to forward only negative half-cycles of the transformed AC voltage to an electrical capacitance of the glazing unit by means of a converter device.

Circuit apparatus for controlling a glazing unit whose transparency is switchable, and switchable glazing assembly, motor vehicle and method for controlling a glazing unit whose transparency is switchable

The invention relates to a diagnosis apparatus for detecting a defect of at least one of a plurality of light emitting diodes which are interconnected to form a light emitting diode series connecting a first supply terminal to a second supply terminal. The defect is intended to be detected with little wiring outlay. The invention provides that a resistance element is connected in parallel with each light emitting diode and a measuring device is configured to generate a diagnosis current between the two supply terminals in a luminous pause, during which none of the light emitting diodes emit light, said diagnosis current giving rise, at each resistance element, to a voltage lower than a forward voltage, starting from which the light emitting diode respectively connected in parallel emits light, and to provide a voltage value of a diagnosis voltage dropped between the supply terminals.

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Vienna, Austria

Wolfgang Koellner