WO2013177757A1 - Pilote de réglage de lumière à del et système de source de lumière à del - Google Patents

Pilote de réglage de lumière à del et système de source de lumière à del Download PDF

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Publication number
WO2013177757A1
WO2013177757A1 PCT/CN2012/076255 CN2012076255W WO2013177757A1 WO 2013177757 A1 WO2013177757 A1 WO 2013177757A1 CN 2012076255 W CN2012076255 W CN 2012076255W WO 2013177757 A1 WO2013177757 A1 WO 2013177757A1
Authority
WO
WIPO (PCT)
Prior art keywords
led
circuit
dimming driver
led dimming
driver
Prior art date
Application number
PCT/CN2012/076255
Other languages
English (en)
Chinese (zh)
Inventor
邹高迪
Original Assignee
Zou Gaodi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zou Gaodi filed Critical Zou Gaodi
Priority to PCT/CN2012/076255 priority Critical patent/WO2013177757A1/fr
Publication of WO2013177757A1 publication Critical patent/WO2013177757A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology

Definitions

  • the present invention relates to a dimming driver for adjusting the brightness of an LED light source, and to an LED light source system using the dimming driver.
  • the LED has a nonlinear relationship between the operating voltage and the current, and the operating voltage of each LED is discrete. In practical applications, the operating current of the LED must be accurately controlled, otherwise the LED will be irreversible. damage. Therefore, as shown in Fig. 2, in the existing LED light source system, most of the LED driving power source adopts the constant current control type power source 100 to ensure the operational reliability of the LED.
  • LED light source for illumination usually needs to be dimmed.
  • the size of the constant current is generally adjusted or the current chopping duty ratio is adjusted.
  • This dimming method is effective for fixedly connected LED lamps, but
  • the load changes due to the movement or addition or subtraction of the luminaire.
  • the single LED light source may cause excessive current damage or shunt.
  • the problem of too little current illuminating darkening or even illuminating. Therefore, dimming non-fixedly connected LED luminaires by adjusting the current does not meet the requirements for reliable operation of the luminaire.
  • the object of the present invention is to provide a method for determining the highest voltage output and continuously modulating within a certain range, and providing an initial voltage value to the LED lamp by manual adjustment of the user to ensure that the LED is at the most
  • the working voltage in the dark state is based on this point as the reference point, and the stepping dimming is performed between the highest point of the voltage, that is, the brightest point. Since the highest voltage is known, the light source also uses this highest voltage as the rated voltage.
  • the voltage is matched, that is, the number of series is connected, and an appropriate current limiting resistor is connected in a single series circuit to ensure Current deviation due to LED nonlinearity or dispersion.
  • One of the technical problems to be solved by the present invention is to provide an LED dimming driver that overcomes the present LED dimming drivers cannot meet the shortcomings of dimming requirements for non-fixed-connected LED lamps.
  • the second technical problem to be solved by the present invention is to provide an LED light source system that overcomes the shortcomings of the existing LED light source system that cannot meet the dimming requirements of non-fixed connection LED lamps.
  • an LED dimming driver comprising: an electromagnetic interference filter circuit, a rectifier circuit, a power factor correction circuit, and a high frequency DC/DC buck isolation conversion Circuit, PWM control circuit, output voltage feedback control circuit, initial voltage regulator, D/A conversion circuit, MCU chip, isolated optocoupler A and isolated optocoupler B; said electromagnetic interference filter circuit, rectifier circuit, power factor correction a circuit, a high frequency DC/DC buck conversion circuit is sequentially connected, an output end of the high frequency DC/DC buck conversion circuit is an output end of the LED dimming driver, and an input end of the power factor correction circuit is the LED tune Optical drive input
  • the input end of the PWM control circuit is connected to the output end of the isolation optocoupler A, and the output end is connected to the control end of the high frequency DC/DC buck isolation conversion circuit;
  • the initial voltage regulating component is connected to the input end of the MCU, and the output end of the MCU is connected to the output voltage feedback control circuit via the D/A conversion circuit, and then connected to the input end of the isolated optocoupler A; the input end of the MCU is connected to the isolated optocoupler B, and the optocoupler B is isolated.
  • the input end is connected to the switch dimming port, and the output voltage feedback control circuit is simultaneously connected to the output end of the LED dimming driver;
  • the LED dimming driver control port control signal value upper limit corresponds to the LED dimming driver output terminal output voltage upper limit
  • the LED dimming driver control port control signal value lower limit corresponding to the LED dimming driver output terminal output voltage driving LED load lamp group The starting voltage of the work.
  • the control signal of the LED dimming driver control port is a standard dimming interface DC1—10V voltage, or the control signal of the LED dimming driver control port is a standard dimming interface DC4- 20MA current.
  • the output voltage of the output of the LED dimming driver is limited to 12 volts, and the upper limit of the voltage value of the control port of the LED dimming driver is 10 volts, and the lower limit is 1 volt; or the LED is adjusted.
  • the upper limit of the output voltage of the optical driver output is 12 volts.
  • the upper limit of the current value of the LED dimming driver control port is 20 mA and the lower limit is 4 mA.
  • the technical solution adopted by the present invention to solve the second technical problem thereof is: constructing an LED light source system
  • the system includes an LED dimming driver and a plurality of LED lamp groups connected in parallel at the output end of the LED dimming driver, wherein:
  • the LED dimming driver comprises an electromagnetic interference filter circuit, a rectifier circuit, a power factor correction circuit, a high frequency DC/DC buck isolation conversion circuit, a PWM control circuit, an output voltage feedback control circuit, a starting voltage regulator, and a D/A Conversion circuit, MCU chip, isolated optocoupler A and isolated optocoupler B;
  • the electromagnetic interference filter circuit, the rectifier circuit, the power factor correction circuit, and the high frequency DC/DC buck conversion circuit are sequentially connected, and the output end of the high frequency DC/DC buck conversion circuit is an output end of the LED dimming driver.
  • the input of the power factor correction circuit is an input of the LED dimming driver
  • the input end of the PWM control circuit is connected to the output end of the isolation optocoupler A, and the output end is connected to the control end of the high frequency DC/DC buck isolation conversion circuit;
  • the initial voltage regulating component is connected to the input end of the MCU, and the output end of the MCU is connected to the output voltage feedback control circuit via the D/A conversion circuit, and then connected to the input end of the isolated optocoupler A; the input end of the MCU is connected to the isolated optocoupler B, and the optocoupler B is isolated.
  • the input end is connected to the switch dimming port, and the output voltage feedback control circuit is simultaneously connected to the output end of the LED dimming driver;
  • the LED dimming driver control port control signal value upper limit corresponds to the LED dimming driver output terminal output voltage upper limit
  • the LED dimming driver control port control signal value lower limit corresponding to the LED dimming driver output terminal output voltage driving LED load lamp group Starting voltage of work
  • Each of the LED lamp sets includes a current limiting element and a plurality of LED lamps connected in series.
  • control signal of the LED dimming driver control port is a standard dimming interface DC1-10V voltage, or the control signal of the LED dimming driver control port is a standard dimming interface DC4-20MA Current.
  • the output voltage of the output of the LED dimming driver is limited to 12 volts, and the upper limit of the voltage value of the control port of the LED dimming driver is 10 volts, and the lower limit is 1 volt; or the LED dimming The output voltage of the driver output is limited to 12 volts.
  • the upper limit of the current value of the LED dimming driver control port is 20 mA and the lower limit is 4 mA.
  • the current limiting element is a resistor.
  • the LED dimming driver and the LED light source system embodying the present invention have the beneficial effects compared with the prior art:
  • Figure 1 is an LED illumination characteristic curve.
  • FIG. 2 is a circuit diagram of an embodiment of a conventional LED light source system.
  • FIG. 3 is a circuit schematic diagram of an embodiment of an LED dimming driver of the present invention.
  • FIG. 4 is a circuit diagram of an embodiment of an LED light source system of the present invention.
  • the LED dimming driver 1 of the present invention includes an EMI filter circuit (Electromagnetic Interference) 101, a rectifier circuit 102, a PFC circuit (Power Factor Correction) 103, and a high frequency DCVDC step-down isolation converter.
  • Circuit 105 PWM control circuit (Pulse Width Modulation) 104, output voltage feedback control circuit 2, initial voltage regulator 110, D/A conversion circuit 108, MCU chip 109, isolated optocoupler A107 and isolated optocoupler B106 .
  • the EMI filter circuit 101, the rectifier circuit 102, the PFC circuit 103, and the high frequency DCVDC buck isolation conversion circuit 105 are sequentially connected.
  • the output end of the high frequency DC/DC buck isolation conversion circuit 105 is the output end 3 of the LED dimming driver 1;
  • the input end of the EMI filter circuit 101 is the input end of the LED dimming driver 1, and the rectifying circuit 102 can include However, it is not limited to a full bridge rectifier circuit, a half bridge rectifier circuit, and the like.
  • the control terminal of the PWM control circuit 104 is connected to the control terminal of the high frequency DC/DC buck isolation conversion circuit 105, and the input terminal of the PWM control circuit 104 is connected to the output terminal of the isolation optocoupler A107.
  • the PWM control circuit 104 is simultaneously connected to the output terminal of the rectifier circuit 102 and the PFC circuit 103, respectively.
  • the output voltage feedback control circuit 2 is connected to the control terminal of the high frequency DC/DC buck isolation conversion circuit 105 through the isolation optocoupler A, and the MCU chip 109 is connected to the input terminal of the D/A conversion circuit 108, D/A.
  • the output of the conversion circuit 108 is connected to the output voltage feedback control circuit 2, and the input of the output voltage feedback control circuit 2 is connected to the two outputs of the LED dimming driver.
  • the starting voltage regulator 110 can include, but is not limited to, a long handle hand potentiometer, a semi-adjustable potentiometer, a trimmer potentiometer, a sealed precision potentiometer, a controllable digital potentiometer, a dial switch combination, and the like.
  • the control terminal of the MCU chip 109 is the control port of the LED dimming driver 1.
  • the adjustment signal of the control port 9 can be a standard dimming interface DC1-10V voltage or a standard dimming interface DC4-20MA current.
  • the signal input end of the MCU chip 109 is connected to the output of the isolation optocoupler 106, and the input end of the isolation optocoupler 106 is connected to the switch dimming port 10 of the LED dimming driver 1.
  • the MCU chip 109 is used for signal processing and control output.
  • the switch dimming control port 10 is a SWITCH-DIM dimming control port, and a voltage signal is applied to the port through the switch, and the output voltage of the LED dimming driver output terminal is slowly adjusted from the upper limit to the starting voltage of the LED load lamp group operation, or The starting voltage from the operation of the LED load lamp group is slowly adjusted to the upper limit voltage of the LED load lamp group.
  • the LED dimming driver stays in this state.
  • the upper limit of the control signal value of the control port of the LED dimming driver 1 corresponds to the upper limit of the output voltage of the output of the LED dimming driver 1
  • the lower limit of the control port value of the control port of the LED dimming driver 1 corresponds to the output voltage of the output of the LED dimming driver 1.
  • the control port control signal can be either a voltage signal or a current signal.
  • the upper limit of the output voltage of the LED dimming driver 1 is 12 volts
  • the upper limit of the control port voltage signal of the LED dimming driver 1 is set to 10 volts
  • the lower limit is 1 volt
  • the output voltage of the LED dimming driver output is When the upper limit is 12 volts, the upper limit of the control port current signal value of the LED dimming driver 1 is set to 20 mA, and the lower limit is 4 mA.
  • the LED light source system of the present invention comprises an LED dimming driver 1 and a plurality of LED lamp groups connected in parallel to the output end of the LED dimming driver 1 (the LED lamp groups 5, 6, 7, 8 are shown in the figure). ).
  • the LED dimming driver 1 adopts the above LED dimming driver, and details are not described herein.
  • Each LED lamp group includes a current limiting component 11 and a plurality of LED lamps 12 connected in series, and the current limiting component 11 can adopt a resistor or a constant current diode. Wait.
  • a plurality of LED light groups are connected to the lamp pull wire or the lamp track 4, and the LED dimming driver 1 is provided, and the dimming control port control signal is a 1-10V or 4-20mA universal dimming port, and the LED dimming
  • the upper limit voltage of the output of the driver 1 is DC12V
  • the LED lamp group is 3-4 LEDs in series (the number of LED lamps depends on the operating voltage of the specific LED lamp).
  • the initial voltage is usually about 1/3 of its rated voltage.
  • the LED light group is weakly illuminated by the user manually adjusting the output starting voltage adjusting member 2.
  • the MCU chip in the LED dimming driver 1 dims the voltage as the LED lamp to the darkest.
  • the initial voltage is relative to the IV state or 4 mA state of the control port 9 of the LED dimming driver 1, and DC12V corresponds to the 10 V state or the 20 mA state of the control port 9 of the LED dimming driver 1.
  • the dimming curve is changed to achieve the purpose of dimming.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

L'invention concerne un pilote de réglage de lumière à DEL (1) et un système de source de lumière à DEL. Le pilote comprend un circuit de filtration des interférences électromagnétiques (101), un circuit de redressement (102), un circuit PFC (103), un circuit d'isolation d'abaissement CC/CC à haute fréquence et de conversion (105), un circuit de commande MLI (104), un circuit de commande à rétroaction de tension de sortie (2), un composant de réglage de tension initiale (110), un circuit de conversion N/A (108), une puce de microcontrôleur (109), un optocoupleur d'isolation A (107) et un optocoupleur d'isolation B (106). Le circuit de filtration des interférences électromagnétiques (101), le circuit de redressement (102), le circuit PFC (103) et le circuit d'isolation d'abaissement CC/CC à haute fréquence et de conversion (105) sont connectés en séquence. Une extrémité d'entrée du circuit de commande MLI est connectée à l'optocoupleur d'isolation B (106), et une extrémité d'entrée de l'optocoupleur d'isolation B est connectée à une interface de réglage de lumière de commutation (10). Le système de source de lumière comprend le pilote (1) et de multiples groupes de lampes à DEL (5, 6, 7, 8) en connexion parallèle avec une extrémité de sortie du pilote. Chaque groupe de lampes comprend des éléments de limitation de courant (11) en connexion en série et de multiples lampes à DEL (12). Dans la présente invention, la lumière des lampes à DEL en connexion fixe et en connexion non fixe peut être réglée, le fonctionnement est simple et facile à mettre en œuvre.
PCT/CN2012/076255 2012-05-30 2012-05-30 Pilote de réglage de lumière à del et système de source de lumière à del WO2013177757A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/076255 WO2013177757A1 (fr) 2012-05-30 2012-05-30 Pilote de réglage de lumière à del et système de source de lumière à del

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/076255 WO2013177757A1 (fr) 2012-05-30 2012-05-30 Pilote de réglage de lumière à del et système de source de lumière à del

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WO2013177757A1 true WO2013177757A1 (fr) 2013-12-05

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104883800A (zh) * 2015-06-15 2015-09-02 南京大学 GHz高速LED光通信驱动器
CN104981043A (zh) * 2014-04-01 2015-10-14 吴燕珊 一种自动调光灯具电路
CN107071966A (zh) * 2017-03-13 2017-08-18 深圳盈特创智能科技有限公司 一种led灯调光***
CN109168215A (zh) * 2018-09-04 2019-01-08 广东明丰电源电器实业有限公司 一种基于多通道控制的调光电路
CN109922566A (zh) * 2019-03-04 2019-06-21 深圳民爆光电技术有限公司 智能调光led驱动装置和led灯控制***
CN110430634A (zh) * 2019-07-24 2019-11-08 深圳市裕明鑫科技有限公司 一种可调节输出电流的led恒流驱动

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* Cited by examiner, † Cited by third party
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KR100940042B1 (ko) * 2009-07-22 2010-02-04 주식회사 동운아나텍 Ｌｅｄ 조명 구동 장치
WO2010047433A1 (fr) * 2008-10-25 2010-04-29 Ki Ho Nam Circuit de commande destiné à une lampe à del ultra-lumineuse
CN201608937U (zh) * 2009-07-01 2010-10-13 西安孚莱德光电科技有限公司 简易智能调光led驱动器
CN102076152A (zh) * 2011-01-21 2011-05-25 南京吉山光电科技有限公司 可调功率led恒流源
CN102264175A (zh) * 2010-05-26 2011-11-30 马士科技有限公司 一种可分级调光的发光二极管灯调光装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010047433A1 (fr) * 2008-10-25 2010-04-29 Ki Ho Nam Circuit de commande destiné à une lampe à del ultra-lumineuse
CN201608937U (zh) * 2009-07-01 2010-10-13 西安孚莱德光电科技有限公司 简易智能调光led驱动器
KR100940042B1 (ko) * 2009-07-22 2010-02-04 주식회사 동운아나텍 Ｌｅｄ 조명 구동 장치
CN102264175A (zh) * 2010-05-26 2011-11-30 马士科技有限公司 一种可分级调光的发光二极管灯调光装置
CN102076152A (zh) * 2011-01-21 2011-05-25 南京吉山光电科技有限公司 可调功率led恒流源

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104981043A (zh) * 2014-04-01 2015-10-14 吴燕珊 一种自动调光灯具电路
CN104883800A (zh) * 2015-06-15 2015-09-02 南京大学 GHz高速LED光通信驱动器
CN107071966A (zh) * 2017-03-13 2017-08-18 深圳盈特创智能科技有限公司 一种led灯调光***
CN109168215A (zh) * 2018-09-04 2019-01-08 广东明丰电源电器实业有限公司 一种基于多通道控制的调光电路
CN109922566A (zh) * 2019-03-04 2019-06-21 深圳民爆光电技术有限公司 智能调光led驱动装置和led灯控制***
CN109922566B (zh) * 2019-03-04 2024-01-12 深圳民爆光电股份有限公司 智能调光led驱动装置和led灯控制***
CN110430634A (zh) * 2019-07-24 2019-11-08 深圳市裕明鑫科技有限公司 一种可调节输出电流的led恒流驱动

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