The method involves comparing a state variable of LED branches (Z1, Z2) with a comparison value during switching on the LED branches. A failure detection signal (I-A) is generated depending on the comparison results. Branch current (I-Z1, I-Z2) flowing through the LED branches is detected as the state variable. The failure detection signal is generated when the branch current drops below the comparison value and flux voltage is present in a LED (D). A switch-off unit (6) connected in series to the LED branches is activated by the failure detection signal in a form of current flux. An independent claim is also included for a circuit arrangement for failure detection of LEDs of an illumination device in a vehicle.
Verfahren und Schaltungsanordnung zur Ausfallerkennung von Leuchtdioden
Method and apparatus for detecting failure of LEDs
Procédé et dispositif de reconnaissance de pannes de diodes electroluminescentes
2017-03-01
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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