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.


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    Title :

    LIGHTING CIRCUIT FOR AUTOMOTIVE LAMP


    Contributors:

    Publication date :

    2022-01-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    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



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    ICHIKAWA TOMOYUKI / MATSUHANA RYOSUKE / KIKUCHI SATOSHI et al. | European Patent Office | 2022

    Free access