To provide a vehicular lighting device and a vehicular lamp which are capable of ensuring a required total luminous flux even when an input voltage is getting close to a lower limit of an operation voltage range and suppressing a rapid change of the total luminous flux when the input voltage is close to the lower limit of the operation voltage range.SOLUTION: A vehicular lighting device has: a first light-emitting circuit which comprises a plurality of first light-emitting elements connected in series; a second light-emitting circuit which comprises a plurality of second light-emitting elements connected in series and is connected in parallel with the first light-emitting circuit; and a control part which is electrically connected with the first light-emitting circuit and the second light-emitting circuit. The number of the first light-emitting elements is greater than the number of the second light-emitting elements. The control part maintains current flowing in at least the second light-emitting circuit nearly constant within an operation voltage range of the vehicular lighting device.SELECTED DRAWING: Figure 5

    【課題】入力電圧が動作電圧範囲の下限近傍になっても必要となる全光束を確保することができ、且つ、動作電圧範囲の下限近傍において、全光束が急激に変化するのを抑制することができる車両用照明装置および車両用灯具を提供することである。【解決手段】実施形態に係る車両用照明装置は、直列接続された複数の第1の発光素子を有する第1の発光回路と;直列接続された複数の第2の発光素子を有し、前記第1の発光回路に並列接続された第2の発光回路と;前記第1の発光回路、および前記第2の発光回路に電気的に接続された制御部と;を具備している。前記第1の発光素子の数は、前記第2の発光素子の数よりも多い。前記制御部は、車両用照明装置の動作電圧範囲において、少なくとも前記第2の発光回路に流れる電流を略一定にする。【選択図】図5


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    Title :

    VEHICULAR LIGHTING DEVICE AND VEHICULAR LAMP


    Additional title:

    車両用照明装置、および車両用灯具


    Contributors:

    Publication date :

    2022-09-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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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