To further reduce a circuit scale.SOLUTION: This device comprises: current detection circuits 31, 32 which drive a plurality of lamps 11, 12 or a plurality of lamps 21, 22 which are connected in parallel, and detect a total current flowing to all of the plurality of lamps 11, 12 or the plurality of lamps 21, 22 which are connected in parallel; and a comparator 337 as a disconnection detection circuit which detects a disconnection of at least one of the plurality of lamps 11, 12 or lamps 21, 22 by comparing the total current detected by the current detection circuits 31, 32 with a disconnection determination threshold set by a threshold setting part 38.SELECTED DRAWING: Figure 1

    【課題】回路規模をより小さくする。【解決手段】並列に接続された複数のランプ11、12または複数のランプ21、22を駆動するとともに並列に接続された複数のランプ11、12または複数のランプ21、22の全てに流れる総電流を検出する電流検出回路31、32と、電流検出回路31、32により検出された総電流と、閾値設定部38により設定された断線判定閾値とを比較することにより複数のランプ11、12またはランプ21、22の少なくとも1つの断線を検出する断線検出回路としての比較器337と、を備えた。【選択図】図1


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    Title :

    DISCONNECTION DETECTION DEVICE


    Additional title:

    断線検出装置


    Contributors:

    Publication date :

    2021-09-16


    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 / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H05B ELECTRIC HEATING , Elektrische Heizung



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