PROBLEM TO BE SOLVED: To achieve a proper light emitting operation in both of a first light emitting state and a second light emitting state with a simple configuration and switching control of light sources.SOLUTION: A lighting circuit drives a light source unit having first and second light sources disposed with different light distributions in the vicinity, for instance, to emit light. The lighting circuit includes: a converter section for generating driving current to be supplied to the first light source and the second light source; a first switch for turning on/off a current path of the driving current for the first light source; a second switch for turning on/off a current path of the driving current for the second light source; and a control section for alternately turning on/off the first switch and the second switch at the period of 50 msec or less according to a first instruction for instructing a first light emitting state and allowing the first light source and the second light source to alternately emit light.SELECTED DRAWING: Figure 1

    【課題】簡易な構成及び光源の切替制御で、第1の発光状態と第2の発光状態の双方で適切な発光動作を実現する。【解決手段】例えば異なる配光で近傍に配置された第1、第2光源を有する光源ユニットを発光駆動する点灯回路とする。点灯回路は、第1光源及び第2光源に供給する駆動電流を生成するコンバータ部と、第1光源についての駆動電流の電流経路をオン/オフする第1スイッチと、第2光源についての駆動電流の電流経路をオン/オフする第2スイッチと、第1の発光状態を指示する第1指示に応じて第1スイッチと第2スイッチを50m秒以下の周期で交互にオン/オフさせ、第1光源と第2光源を交互に発光させる制御を行う制御部とを備える。【選択図】図1


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    Title :

    LIGHTING CIRCUIT AND VEHICULAR LIGHTING FIXTURE


    Additional title:

    点灯回路、車両用灯具


    Contributors:

    Publication date :

    2016-12-15


    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




    LIGHTING CIRCUIT AND VEHICULAR LIGHTING FIXTURE

    ICHIKAWA TOMOYUKI | European Patent Office | 2018

    Free access

    LIGHTING CIRCUIT AND VEHICULAR LIGHTING FIXTURE

    MURAMATSU TAKAO / KIKUCHI MASARU | European Patent Office | 2018

    Free access