전환 회로는, 제2의 광원 블록에 병렬로 접속되어 제어 단자에 입력되는 제어 신호에 따라서 임피던스가 변화되는 능동 소자를 가지고, 능동 소자의 온, 오프에 의해 제2의 광원 블록의 점등, 소등을 전환한다. 전환 회로는, 능동 소자에 흐르는 전류가 전환 제어 회로에서 설정되는 목표치에 일치하도록, 능동 소자의 임피던스를 조정한다. 전환 제어 회로는, 능동 소자를 온 할 때, 목표치를 시간 경과에 따라 서서히 변화시키므로, 능동 소자가 오프 상태로부터 온 상태로 이행하는 도중에, 과대한 부하 전류가 흐르는 것을 방지할 수 있다.

    A switching circuit includes an active element connected in parallel to a second light source block and having an impedance that varies in accordance with a control signal input into a control terminal, and switches the second light source block between a lit condition and an extinguished condition by switching the active element ON and OFF. The switching circuit adjusts the impedance of the active element so that a current flowing to the active element matches a target value set by a switching control circuit. When the active element is to be switched ON, the switching control circuit varies the target value gradually over time, and therefore an excessive load current can be prevented from flowing while the active element shifts from an OFF condition to an ON condition.


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    Titel :

    LIGHTING DEVICE AND VEHICLE HEADLAMP


    Weitere Titelangaben:

    점등 장치 및 차량용 전조등


    Erscheinungsdatum :

    2016-10-18


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    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 / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES



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