LED DRIVER, AND LED DRIVE CIRCUIT DEVICE AND ELECTRONIC EQUIPMENT THAT USE SAID LED DRIVER

An LED driver comprising: an LED constant current source connected to a plurality of LED strings individually with an LED connection terminal interposed therebetween; a selection unit for selecting the LED connection terminal of the LED string, among the plurality of LED strings, for which the LED f...

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Main Authors MURAMATSU Yasunori, KATSURA Koji
Format Patent
LanguageEnglish
French
Japanese
Published 01.11.2018
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Abstract An LED driver comprising: an LED constant current source connected to a plurality of LED strings individually with an LED connection terminal interposed therebetween; a selection unit for selecting the LED connection terminal of the LED string, among the plurality of LED strings, for which the LED forward total voltage is greatest as a subsequent detection LED connection terminal; and a comparator for comparing the voltage of the detection LED connection terminal and a first reference voltage; a feedback voltage for which the output voltage has undergone voltage-division undergoing voltage transformation on the basis of the output of the comparator. Un pilote de DEL comprend : une source de courant constant de DEL connectée à une pluralité de chaînes de DEL de façon individuelle avec une borne de connexion de DEL interposée entre celles-ci ; une unité de sélection pour sélectionner la borne de connexion de DEL de la chaîne de DEL, parmi la pluralité de chaînes de DEL, pour laquelle la tension totale directe de DEL est la plus élevée en tant que borne de connexion de DEL de détection ultérieure ; et un comparateur pour comparer la tension de la borne de connexion de DEL de détection et une première tension de référence ; une tension de rétroaction pour laquelle la tension de sortie a subi une transformation de tension subissant une transformation de tension sur la base de la sortie du comparateur. 複数のLEDストリングには各別にLED接続端子を介して接続されたLED定電流源と、前記複数のLEDストリングの内、LED順方向総電圧がもっとも大きいLEDストリングの前記LED接続端子を以降検出用LED接続端子として選択する選択部と、前記検出用LED接続端子の電圧と第1参照電圧とを比較する比較部と、を備え、前記比較部の出力に基づき、出力電圧を分圧した帰還電圧を変圧させるLEDドライバとしている。
AbstractList An LED driver comprising: an LED constant current source connected to a plurality of LED strings individually with an LED connection terminal interposed therebetween; a selection unit for selecting the LED connection terminal of the LED string, among the plurality of LED strings, for which the LED forward total voltage is greatest as a subsequent detection LED connection terminal; and a comparator for comparing the voltage of the detection LED connection terminal and a first reference voltage; a feedback voltage for which the output voltage has undergone voltage-division undergoing voltage transformation on the basis of the output of the comparator. Un pilote de DEL comprend : une source de courant constant de DEL connectée à une pluralité de chaînes de DEL de façon individuelle avec une borne de connexion de DEL interposée entre celles-ci ; une unité de sélection pour sélectionner la borne de connexion de DEL de la chaîne de DEL, parmi la pluralité de chaînes de DEL, pour laquelle la tension totale directe de DEL est la plus élevée en tant que borne de connexion de DEL de détection ultérieure ; et un comparateur pour comparer la tension de la borne de connexion de DEL de détection et une première tension de référence ; une tension de rétroaction pour laquelle la tension de sortie a subi une transformation de tension subissant une transformation de tension sur la base de la sortie du comparateur. 複数のLEDストリングには各別にLED接続端子を介して接続されたLED定電流源と、前記複数のLEDストリングの内、LED順方向総電圧がもっとも大きいLEDストリングの前記LED接続端子を以降検出用LED接続端子として選択する選択部と、前記検出用LED接続端子の電圧と第1参照電圧とを比較する比較部と、を備え、前記比較部の出力に基づき、出力電圧を分圧した帰還電圧を変圧させるLEDドライバとしている。
Author KATSURA Koji
MURAMATSU Yasunori
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DocumentTitleAlternate PILOTE DE DEL, ET DISPOSITIF DE CIRCUIT D'ATTAQUE DE DEL ET ÉQUIPEMENT ÉLECTRONIQUE UTILISANT LEDIT PILOTE DE DEL
LEDドライバ、並びに、これを用いるLED駆動回路装置および電子機器
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Snippet An LED driver comprising: an LED constant current source connected to a plurality of LED strings individually with an LED connection terminal interposed...
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SourceType Open Access Repository
SubjectTerms APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
GENERATION
Title LED DRIVER, AND LED DRIVE CIRCUIT DEVICE AND ELECTRONIC EQUIPMENT THAT USE SAID LED DRIVER
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