An automotive lamp includes a first semiconductor light source and a second semiconductor light source configured to emit different colors, and to mix the two colors, so as to generate mixed-color light. A first driving circuit supplies a first driving current stabilized to a first target amount to the first semiconductor light source. A second driving circuit supplies a second driving current stabilized to a second target amount to the second semiconductor light source. Upon detecting an abnormal non-lighting state in the first semiconductor light source, the first abnormal state detection circuit stops the operation of the second driving circuit. Upon detecting an abnormal non-lighting state in the second semiconductor light source, the second abnormal state detection circuit stops the operation of the first driving circuit.
LIGHTING CIRCUIT FOR AUTOMOTIVE LAMP
27.01.2022
Patent
Elektronische Ressource
Englisch
IPC: | H05B ELECTRIC HEATING , Elektrische Heizung / 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 |