The method involves operating a semiconductor light source i.e. LED, by pulse width modulated signals (I) with preset duty ratio between pulse duration (TE) and a period (T). The light source is applied during entire duration of diagnosis with pulse (TE0) of the pulse width modulated signals. The light source is operated during a diagnostic operation (32) deviated from a normal operation (34) of the light source. A period duration (T0) of the pulse width modulated signals during the diagnostic operation is selected to be greater than the period during the normal operation. Independent claims are also included for the following: (1) a control unit for a lighting device for operating a semiconductor light source (2) a lighting device comprising a semiconductor light source.
Verfahren zum Betreiben einer Beleuchtungseinrichtung eines Fahrzeugs
Method for operating a lighting device of a vehicle
Procédé de fonctionnement d'un dispositif d'éclairage d'un véhicule
02.03.2016
Patent
Elektronische Ressource
Deutsch
IPC: | B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / H05B ELECTRIC HEATING , Elektrische Heizung |
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