To simplify a circuit configuration for achieving a light emission pattern in which light intensity of a light emitting element is gradually decreased with the passage of time.SOLUTION: A control unit 2 to control a lighting state of a light source that includes at least one light emitting element includes: a specific waveform generating part 28 generating a voltage of a specific waveform such as a triangular wave; a first circuit part including a series circuit of a resistive element 26 and a capacitor 27 and a first switching element 22 connected in parallel with the capacitor; a second circuit part including a second switching element 24 and a third switching element 23 which have respective current paths connected in series, the second switching element having a control terminal connected to an output terminal of the specific waveform generating part and the third switching element having a control terminal connected to a node 42 between the resistive element and the capacitor in the first circuit part; and a third circuit part including a fourth switching element 31 that has a current path connected in series with the light source, the on/off state of the fourth switching element being controlled by the second circuit part.SELECTED DRAWING: Figure 1

    【課題】発光素子の光強度を時間経過とともに漸減させる発光パターンを実現するための回路構成を簡略化すること。【解決手段】少なくとも1つの発光素子を含む光源の点灯状態を制御するための制御装置2であって、三角波等の特定波形の電圧を発生させる特定波形発生部28と、抵抗素子26とコンデンサ27の直列回路及びコンデンサに並列接続された第1スイッチ素子22を有する第1回路部と、互いの電流経路を直列に接続された第2スイッチ素子24及び第3スイッチ素子23を有している。第2スイッチ素子の制御端子が特定波形発生部の出力端子に接続され、第3スイッチ素子の制御端子が第1回路部の抵抗素子とコンデンサとの間の節点42に接続された第2回路部と、電流経路を光源と直列に接続された第4スイッチ素子31を有しており、第4スイッチ素子のオン/オフが第2回路部によって制御される第3回路部を含む。【選択図】図1


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    Titel :

    LIGHT SOURCE CONTROL UNIT AND VEHICLE LAMP


    Weitere Titelangaben:

    光源の制御装置、車両用灯具


    Beteiligte:
    HIROSE YOICHI (Autor:in)

    Erscheinungsdatum :

    2019-04-11


    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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