PROBLEM TO BE SOLVED: To provide a light-emitting element drive device capable of preventing an average value of an output current from being varied by varying an anode voltage of a light-emitting element.SOLUTION: The light-emitting element drive device comprises: a reset signal generation part for generating a reset signal RESET in accordance with a current flowing in a light-emitting element Z1; a set signal generation part for generating a set signal SET in accordance with an anode voltage Vom of the light-emitting element Z1; and an output voltage supply part which generates an output voltage Vo from an input voltage Vi in response to the reset signal RESET and the set signal SET and supplies the output voltage V to the light-emitting element Z1. The set signal generation part includes: a current generation part (a voltage dividing circuit 5 and a voltage/current conversion circuit 6) for generating a current corresponding to the anode voltage Vom of the light-emitting element Z1; a charging part 7 which charges the current generated by the current generation part; and a comparator COM2 for generating the set signal SET in accordance with a result of comparing a charging voltage of the charging part 7 to a reference voltage V.SELECTED DRAWING: Figure 1A

    【課題】発光素子のアノード電圧の変動によって出力電流の平均値が変動することを抑えることができる発光素子駆動装置を提供する。【解決手段】発光駆動装置は、発光素子Z1を流れる電流に応じてリセット信号RESETを生成するリセット信号生成部と、発光素子Z1のアノード電圧Vomに応じてセット信号SETを生成するセット信号生成部と、リセット信号RESET及びセット信号SETに応じて、入力電圧Viから出力電圧Voを生成して出力電圧Voを発光素子Z1に供給する出力電圧供給部と、を有する。前記セット信号生成部は、発光素子Z1のアノード電圧Vomに応じた電流を生成する電流生成部(分圧回路5及び電圧電流変換回路6)と、前記電流生成部によって生成された電流を充電する充電部7と、充電部7の充電電圧と基準電圧VREFとの比較結果に応じてセット信号SETを生成するコンパレータCOM2と、を有する。【選択図】図1A


    Access

    Download


    Export, share and cite



    Title :

    LIGHT-EMITTING ELEMENT DRIVE DEVICE, LIGHT-EMITTING DEVICE AND VEHICLE


    Additional title:

    発光素子駆動装置、発光装置、車両


    Contributors:

    Publication date :

    2016-05-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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 / H01L Halbleiterbauelemente , SEMICONDUCTOR DEVICES



    LIGHT EMITTING ELEMENT DRIVE DEVICE, LIGHT EMITTING DEVICE, AND VEHICLE

    TAKAGIMOTO SHINSUKE | European Patent Office | 2020

    Free access

    LIGHT EMITTING ELEMENT DRIVE DEVICE, LIGHT EMITTING DEVICE, AND VEHICLE

    TAKAGIMOTO SHINSUKE | European Patent Office | 2016

    Free access

    LIGHT EMITTING ELEMENT DRIVE DEVICE, LIGHT EMITTING DEVICE, AND VEHICLE

    TAKAGIMOTO SHINSUKE / NAKATANI YOSHIYUKI / KAWASE SHIGENORI | European Patent Office | 2016

    Free access

    LIGHT-EMITTING ELEMENT DRIVE DEVICE, LIGHT-EMITTING DEVICE, AND VEHICLE

    NAKAYAMA MASAAKI | European Patent Office | 2022

    Free access

    LIGHT-EMITTING ELEMENT DRIVE CONTROL DEVICE AND LIGHT-EMITTING ELEMENT DRIVE CIRCUIT DEVICE

    AOKI AKIRA / TAKAGI RYO | European Patent Office | 2019

    Free access