The drive circuit receives an input voltage, and to supply a drive current ILED stabilized to a target amount IREF to the semiconductor light source. A plurality of bypass switches is respectively connected in parallel to a corresponding part of the plurality of light-emitting elements. The bypass control unit generates phase-shifted gate pulse signals, and controls the bypass switches in correspondence to the gate pulse signals. The bypass control unit changes a duty ratio of each gate pulse signal in correspondence to a target luminance of a corresponding part, and corrects the duty ratio of each gate pulse signal based on the input voltage.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    LIGHTING CIRCUIT AND VEHICLE LAMP


    Beteiligte:

    Erscheinungsdatum :

    11.06.2020


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    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





    VEHICLE LAMP AND LIGHTING CIRCUIT

    ICHIKAWA TOMOYUKI / SUZUKI TETSUYA / OZAWA ATSUSHI et al. | Europäisches Patentamt | 2020

    Freier Zugriff

    Lighting circuit and vehicle lamp

    MURAKAMI TAKUYA / YOSHIDA SHUNICHIRO | Europäisches Patentamt | 2019

    Freier Zugriff

    LIGHTING CIRCUIT AND VEHICLE LAMP

    HARA YONOSUKE / TSUCHIYA TOSHIYUKI | Europäisches Patentamt | 2023

    Freier Zugriff