PROBLEM TO BE SOLVED: To provide a lighting device capable of reducing temporal variation of the brightness of output light, a luminaire for a vehicle and a vehicle using the same.SOLUTION: A DC-DC converter 11 supplies current to a plurality of LED light sources 3a-3d for irradiating a common area with light. A control circuit 13 controls a plurality of switching circuits 12a-12d to perform PWM-control on a period during which current flows through each of the plurality of LED light sources 3a-3d. In a second period including the first period in which one of the plurality of LED light sources 3a-3d is turned off, the control circuit 13 selects at least one LED light source other than the above one LED light source out of the plurality of LED light sources 3a-3d. Further, the control circuit 13 controls the output of the DC-DC converter circuit 11 so that the brightness of light emitted from the plurality of LED light sources 3a-3d is constant over the entire period.SELECTED DRAWING: Figure 1

    【課題】出力光の明るさの時間的な変化を低減できる点灯装置、車両用照明装置、及びそれを用いた車両を提供する。【解決手段】DC−DCコンバータ11は、互いに共通する領域に光を照射する複数のLED光源3a〜3dに電流を供給する。制御回路13は、複数の切替回路12a〜12dを制御することによって、複数のLED光源3a〜3dのそれぞれに電流が流れる期間をPWM制御する。制御回路13は、複数のLED光源3a〜3dのうち1つのLED光源が消灯する第1期間を含む第2期間において、複数のLED光源3a〜3dのうち上記1つのLED光源以外の少なくとも1つのLED光源を点灯させる。さらに、制御回路13は、複数のLED光源3a〜3dから照射される光の明るさが全期間で一定になるようにDC−DCコンバータ回路11の出力を制御する。【選択図】図1


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    Titel :

    LIGHTING DEVICE, LUMINAIRE FOR VEHICLE AND VEHICLE USING THE SAME


    Weitere Titelangaben:

    点灯装置、車両用照明装置、及びそれを用いた車両


    Beteiligte:
    TAKAMATSU MASAAKI (Autor:in) / KATO KAZUYA (Autor:in) / FUKUI TAKAHIRO (Autor:in)

    Erscheinungsdatum :

    2017-01-26


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    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



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