KR101021780B1 - POWER SUPPLY for driving LED - Google Patents

POWER SUPPLY for driving LED Download PDF

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KR101021780B1
KR101021780B1 KR1020080102529A KR20080102529A KR101021780B1 KR 101021780 B1 KR101021780 B1 KR 101021780B1 KR 1020080102529 A KR1020080102529 A KR 1020080102529A KR 20080102529 A KR20080102529 A KR 20080102529A KR 101021780 B1 KR101021780 B1 KR 101021780B1
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light emitting
voltage
phase
signal
control
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Korean (ko)
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KR20100043479A (en
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박채원
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박채원
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    • 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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • 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]
    • H05B45/10—Controlling the intensity of the light
    • 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

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

Abstract

본발명은 다수의 발광다이오드 구동에 있어서, 교류전원을 위상제어하여 다수의 발광다이오드에 일정한전류(정전류)를 공급하는 발광다이오드교류위상제어구동장치에 관한것으로, 입력교류전압의위상을 제어하기 위한 트라이액(Triac),SCR,다이오드등으로 구성된 제어부와; 발광다이오드에 흐르는 전류를 검출하고 외부입력에 따라 신호를 만드는 정전류검출부; 교류전원의 위상을 검출하여 제어부에 동기신호를 보내주는 위상검출부; 상기 검출부,동기부에서 신호를 받아 차동증폭기(OPAMP)또는, 마이컴등을 이용하여 제어부에 신호를 주는 동기신호부; 제어부에서 나오는 맥류전압을 직류전압으로 평활하여 발광다이오드에 안정된 직류전압을 공급하는 평활부;전자파 장애 차단을 위한 EMI Filter부;를 포함하는 것을 특징으로 하는 구동장치를 제공한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode alternating current phase control driving apparatus for supplying a constant current (constant current) to a plurality of light emitting diodes by phase controlling an AC power source in driving a plurality of light emitting diodes. A control unit including a triac, SCR, diode, and the like; A constant current detector for detecting a current flowing in the light emitting diode and generating a signal according to an external input; A phase detector for detecting a phase of the AC power and sending a synchronization signal to the controller; A synchronization signal unit which receives a signal from the detection unit and the synchronization unit and gives a signal to the control unit using a differential amplifier (OPAMP) or a microcomputer; It provides a drive device comprising a smoothing unit for supplying a stable DC voltage to the light emitting diode by smoothing the pulse voltage from the control unit with a DC voltage; EMI Filter unit for blocking electromagnetic interference.

발광다이오드(LED),교류전압,위상제어,정전류,트라이액(Triac),SCR Light Emitting Diode (LED), AC Voltage, Phase Control, Constant Current, Triac, SCR

Description

발광다이오드 교류위상제어 구동장치{POWER SUPPLY for driving LED}Light Emitting Diode AC Phase Control Driving Device {POWER SUPPLY for driving LED}

본발명은 다수의 발광다이오드(LED)를 교류(상용전원)로 구동하는데 있어서, 교류전압의 파형의 일부를 위상제어하여 발광다이오드(LED)에 공급되는 전류를 일정(정전류)하게 흐르게 하는 발광다이오드교류위상제어구동장치이다.In the present invention, a plurality of light emitting diodes (LEDs) are driven by an alternating current (commercial power supply), and the light emitting diodes are configured to phase-control a part of the waveform of the alternating voltage so that a current supplied to the light emitting diodes (LED) flows at a constant (constant current). AC phase control drive device.

일반적으로 교류전압으로 다수의 발광다이오드(LED)를 구동하기 위해서는, 별도의 직류전압 공급장치를 구비,DC전압을 하거나, 발광다이오드(LED)에 교류전압을 다이오드,저항등을 통해 직접 인가하는 등의 방법으로 구동 할 수 있다.In general, in order to drive a plurality of light emitting diodes (LEDs) with an AC voltage, a separate DC voltage supply device is provided to apply a DC voltage or directly apply an AC voltage to the light emitting diodes (LED) through a diode, a resistor, or the like. Can be driven in a way.

별도의 직류전압 공급장치 구동의 경우 구성부품의 소형화와 비용증가등의 문제점과, 저항을 이용한 직접 구동방식등은 발광다이오드(LED)의 최대전류를 제안하기 위한 저항의 증가로 효율을 감소시켜 전력손실을 증가시킨다.In case of driving a separate DC voltage supply device, problems such as miniaturization of components and increase in cost, and a direct drive method using a resistor decrease the efficiency by increasing the resistance to propose the maximum current of the LED. Increase the loss.

본발명은 교류전원으로 다수의 발광다이오드(LED)를 구동 할 때, 교류전압을 적절한 주기만큼 제어 출력하여 정전류로 구동함으로서 저비용 고효율의 구동장치를 제공하는 것을 목적으로 한다.An object of the present invention is to provide a low cost and high efficiency drive device by driving a plurality of light emitting diodes (LEDs) with an AC power source and controlling the AC voltage by an appropriate period to drive a constant current.

전술한 목적을 달성하기 위해서, 다수의 발광다이오드(LED)에 흐르는 전류를 검출하고, 주기적인 교류 파형에 대하여 트라이액(Triac),SCR,다이오드등을 이용하여 적절한 주기만큼 위상제어하여, 다수의 발광다이오드(LED)에 일정한 전류(정전류)를 공급하고, 외부입력에 따라 ON/OFF, 디밍(Dimmer)등의 동작을 할 수 있는 구동장치를 제공한다.In order to achieve the above object, a current flowing through a plurality of light emitting diodes (LEDs) is detected, and phase control is performed by using a triac, SCR, diode, and the like for a periodic alternating waveform by an appropriate period. Provides a driving device that supplies a constant current (constant current) to a light emitting diode (LED) and can operate ON / OFF, dimming, etc. according to an external input.

교류를 직류로 변환하기 위해 별도의 직류전원장치 구비시 소용화의 문제점과 발생하는 고비용, 직접 교류전압 인가시 발광다이오드(LED)의 최대전류를 제안한 저항으로 인한 저효율의 문제점을 해결하고, 발광다이오드(LED)의 갯수와 색상에 의한 전압편차, 제조사의 차이등에 관계없이 예측 가능하고 일치되는 광도와 색도를 표현할수 있게하고, 저비용 고효율의 구동장치를 제공하는 것을 효과가 있다.It solves the problem of dissipation when there is a separate DC power supply device to convert AC into DC and the problem of low efficiency due to the resistance which suggests the high cost, the maximum current of the LED when applying direct AC voltage, and the LED It is effective to provide predictable and consistent brightness and chromaticity regardless of the number of LEDs, voltage deviation due to color, and manufacturer's difference, and to provide a low cost and high efficiency driving device.

이하 첨부된 도면을 참조하여 실시예에 대해 상세이 설명한다. 도면 1은 발광다이오드 교류위상제어장치의 계락적인 블록도이다. 도면 1을 참조하면, 상기 발광다이오드 교류위상제어 구동장치는 상용전원인 교류입력전압(100)은 전자파 장애 차단을 위한 EMI Filter(200)부를 거처,Triac,SCR 다이오드로 구성된 제어부(300)에 연결되고, 제어부에서 동기신호에 대하여 위상제어되어 출력된 맥류를 직류로 변환시키기 위해 코일과 콘덴서로 구성된 회로로 다수의 발광다이오드(800)에 전원을 공급하는 평활부(400);다수의 발광다이오드(800)에 흐르는 구동전류를 검출하여 동기신호부(600)에 상기 검출 전류값을 보내는 전류검출부(500); EMI Filter(200)부를 거친 교류입력 전압에서 차등증폭기(OPAMP),마이크로 프로세서등에 필요한 전원을 공급하고, 상기 교류입력 전압에서 동기신호를 만들어 동기신호부(600)에 펄스신호를 보내는 위상검출부(700); 상기 위상검출부와 전류검출부에서 출력된 신호를 비교하고, 외부의 ON/OFF,디밍등의 신호에 따라, 차등증폭기(OPAMP)또느 마이크로 프로세서로 구성되어 제어부에 신호를 보내는 동기신호부(600)를 포함한다.Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. 1 is an exploded block diagram of a light emitting diode AC phase control device. Referring to FIG. 1, the AC phase control driving device of the light emitting diode is connected to a control unit 300 composed of triac and SCR diodes through an EMI filter 200 for preventing electromagnetic interference. And a smoothing unit 400 for supplying power to the plurality of light emitting diodes 800 in a circuit consisting of a coil and a condenser to convert the pulses outputted in phase control with respect to the synchronous signal to a direct current, and a plurality of light emitting diodes ( A current detector 500 which detects a driving current flowing through the 800 and sends the detected current value to the synchronization signal unit 600; Phase detection unit 700 for supplying the power required for the differential amplifier (OPAMP), microprocessor, etc. at the AC input voltage passing through the EMI filter (200), and generating a synchronization signal from the AC input voltage to send a pulse signal to the synchronization signal unit 600 ); Comparing the signal output from the phase detection unit and the current detection unit, according to the external ON / OFF, dimming, etc., the differential amplifier (OPAMP) or microprocessor is configured to send a signal to the control unit 600 synchronization signal unit Include.

상기 발광다이오드 위상제어 구동장치에 제공하는 교류전원(100)은 상용 교류전원을사용하나 이에 한정된 것은 아니다.The AC power supply 100 provided to the light emitting diode phase control driving apparatus uses a commercial AC power supply, but is not limited thereto.

상기 발광다이오드 위상제어 구동장치는 다수의 LED에 흐르는 전류를 검출 교류를 위상제어함으로서 교류로 다수의 LED를 동작시킬때, 저비용 고효율의 구동장치를 제공한다.The light emitting diode phase control driving apparatus provides a low cost and high efficiency driving apparatus when operating a plurality of LEDs in alternating current by phase-controlling alternating current detecting currents flowing in the plurality of LEDs.

발광다이오드 위상제어 구동장치를 상세이 살펴보면, 상기 위상검출부에서는 교류 전압이 프러스(+)에서 마이너스(-) 또는 마이너스(-)에서 프러스(+)로 반전되는 점을 기준으로 펄스를 발생하여 동기부에 보내줌으로서, 동기부에서 제어부로 보내는 위상신호의 기준으로 하고, 교류입력전압의 일부를 강압정류하여 차등증폭기(OPAMP)또는 마이크로 프로세서에 필요한 직류전압도을 공급한다.Looking at the light emitting diode phase control driving device in detail, the phase detection unit generates a pulse based on the point where the AC voltage is inverted from the positive (-) to the negative (-) or the positive (-) to the positive (+) to the synchronization unit. As a reference, as a reference for the phase signal sent from the synchronizer to the controller, a part of the AC input voltage is subjected to step-down rectification to supply the DC voltage diagram required for the differential amplifier (OPAMP) or the microprocessor.

상기 제어부는 동기부의 펄스 신호에 따라 교류전압중 일부만을 다수의 발광 다이오드(LED)에 인가하도록 제어한다. 제어부는 인가전압,연결되어 있는 다수의 발광다이오드에 따라 다양한 구성을 할수 있으며 (도면2)은 그 실시예를 보여준다.The controller controls only a part of the AC voltage to be applied to the plurality of light emitting diodes (LEDs) according to the pulse signal of the synchronizer. The control unit may have various configurations according to the applied voltage and the plurality of light emitting diodes connected thereto (FIG. 2).

상기 동기신호부(600)는 위상검출부(700)와 전류검출부(500)의 신호를 비교하여 제어부에 신호를 보내 제어부(300)를 동작시킨다. 구성예로 차동증폭기(OPAMP)를 이용, 위상검출 신호를 삼각파로 하여, 전류검출신호와 비교하여 동기신호를 만드는 방식과; 마이크로 프로세서로 교류위상 동기신호와 전류검출부(500)의 신호를 비교한값을 프로그램으로 출력하여 제어하는 방식으로 구성할수있다. 또한 외부입력단자를 두어 광센서(CDS)또는 아날로그 입력으로 연결하여 주위 밝기에 의한 ON/OFF가 가능하고; SW 또는 펄스폭 변조에 의한 디밍신호로 ON/OFF 또는 펄스폭에 따라 발광다이오드(LED)의 밝기를 희미한 수준에서 최대 밝기 까지 조절할 수 있는 기능을 가진 회로를 포함한다.The synchronization signal unit 600 compares the signals of the phase detector 700 and the current detector 500 and sends a signal to the controller to operate the controller 300. A configuration example in which a phase detection signal is a triangular wave using a differential amplifier (OPAMP), and a synchronization signal is produced by comparing with a current detection signal; The microprocessor can be configured to control and output the value obtained by comparing the AC phase synchronization signal with the signal of the current detector 500. It is also possible to turn on / off by ambient brightness by connecting external input terminal to optical sensor (CDS) or analog input; It is a dimming signal by SW or pulse width modulation and includes a circuit having a function to adjust the brightness of a light emitting diode (LED) from a dim level to a maximum brightness according to ON / OFF or pulse width.

상기 전류검출부(500)는 다수의 발광다이오드(LED)에 흐르는 전류를 검출함으로서 다수의 발광다이오드(LED)구동시 입력전압의 세기와 발광다이오드의 갯수와 특성에 따라 변하는 전류의 변화를 동기신호부(600)에 보내줌으로서 정전류를 유지하게 하는 역활과, 출력단의 연결상태를 감지하여 발광다이오드가 연결이 되지 않았거나, 불량으로 인한 출력 개방시, 출력전압 상승으로 인한 위험과 불량등을 방지하는 기능을 가진 회로도 포함된다. The current detector 500 detects a current flowing through a plurality of light emitting diodes (LEDs), thereby synchronizing a change in a current which varies according to the intensity of an input voltage and the number and characteristics of the light emitting diodes when driving the plurality of light emitting diodes (LEDs). It serves to maintain a constant current by sending to (600), and detects the connection state of the output terminal, and prevents the risk and failure due to the output voltage rise, when the light emitting diode is not connected or the output is open due to a bad A circuit with

상기 평활부(400)는 제어부에서 출력되는 위상제어된 맥류 파형을 인덕턴스와 콘덴서로 구성된 회로로 평활하여 직류전압을 다수의 발광다이오드(LED)에 공급한다.The smoothing unit 400 smoothes the phase-controlled pulse wave waveform output from the control unit in a circuit composed of an inductance and a condenser to supply a DC voltage to the plurality of light emitting diodes (LEDs).

상기 EMI Filter부는 교류입력전원에서 들어오는 서지전압,전자파장애등을 차단하여 안정적으로 구동장치의 동작시킨다.The EMI Filter unit stably operates the driving device by blocking surge voltage and electromagnetic interference from AC input power.

이로서 다수의 발광다이오드(LED)를 구동하는대 있어서,입력 교류전압의 변화,발광다이오드(LED)의 갯수와 색상에 의한 전압편차, 제조사의 차이등에 관계없이 예측 가능하고 일치되는 광도와 색도를 표현할수 있다.As a result, a large number of light emitting diodes (LEDs) can be driven to display predictable and consistent brightness and chromaticity regardless of changes in input AC voltage, voltage variation due to the number and color of light emitting diodes (LEDs), and differences in manufacturers. have.

본 발명에 따른 발광다이위상제어오드구동장치는 예시적인 실시예에 불과한 것 으로서, 본발명은 상기한 실시예에 한정되지 않고, 본발명의 통상의 지식을 가진자라면 다양한 변형및, 균등한 타 실시예가 가능하다는 점을 이해할것이다.The light emitting die phase control node driving apparatus according to the present invention is merely an exemplary embodiment, and the present invention is not limited to the above-described embodiments, and those skilled in the art can make various modifications and other equivalents. It will be appreciated that embodiments are possible.

도 1은 본 발명의 실시예에 따른 기본원리를 설명하는 개략적인 블록도.1 is a schematic block diagram illustrating a basic principle according to an embodiment of the present invention.

도 2는 본 발명의 교류입력전원과 발광다이오드의 개수에 따른, 제어부(300)의 다양한 형때의 도면.2 is a diagram of various types of control unit 300 according to the number of AC input power and light emitting diodes of the present invention.

도 3은 본 발명에 따른 위상제어되어 나오는 파형.3 is a waveform of phase control according to the present invention.

도 4는 본 발명에 따른 각 부의 동작 파형.
도 5는 본 발명에 따른 회로도 예4 is an operation waveform of each part according to the present invention.
5 is an example circuit diagram according to the present invention;

<도면의 중요 부분에 대한 부호의 설명><Explanation of symbols for important parts of the drawing>

100; 교류전원 200;EMI Filter부100; AC power supply 200; EMI filter

300; 제어부 400; 평활부300; A controller 400; Smooth part

500;전류검출부 600; 동기신호부500; current detector 600; Synchronization signal part

700; 위상검출부700; Phase detector

Claims (3)

교류입력전압으로 다수의 발광다이오드를 구동하는데 있어서, 상용전원에 연결하여 교류전압의 위상을 제어하기위한 트라이액(Triac) 또는 SCR 및 다이오드로 구성된 제어부와,상기 제어부에서 나온 위상제어된 교류전압을 안정된 직류전압으로 평활하여 다수의 발광다이오드(LEDS)에 공급하는 평활부; 다수의 발광다이오드(LEDS)에 흐르는 전류를 전압으로 검출하는 전류검출부; 교류입력 전압에 따라 펄스신호를 만드는 위상검출부; 상기 위상검출부의 펄스신호와와 전류검출부의 검출전압신호를 비교하고, 외부에서 입력되는 ON/OFF,Dimmer 신호와 함깨 차동증폭기(OPAMP) 또는 마이컴으로 구성되어, 제어부에 제어동기신호를 보내는 동기신호부;를 포함하는것을 특징으로 하는 발광다이오드 교류위상제어 구동장치In driving a plurality of light emitting diodes with an AC input voltage, a control unit comprising a triac or SCR and a diode connected to a commercial power source to control the phase of the AC voltage, and a phase-controlled AC voltage from the control unit. Smoothing unit for supplying a plurality of light emitting diodes (LEDS) by smoothing at a stable DC voltage; A current detector for detecting a current flowing through the plurality of light emitting diodes (LEDS) as a voltage; A phase detector for generating a pulse signal according to an AC input voltage; A synchronous signal for comparing the pulse signal of the phase detector with the detected voltage signal of the current detector, and a differential amplifier (OPAMP) or a microcomputer with ON / OFF and Dimmer signals input from the outside, and sending a control synchronous signal to the controller. Light-emitting diode AC phase control drive device characterized in that it comprises a; 제1항에 있어서 다수의 발광다이오드(LED)에 흐르는 전류를 검출하고, 교류입력전압의 위상을 비교하여, 입력교류전원의 위상을 제어하는 제어신호를 발생시켜 Triac 또는 SCR로 위상제어하여, 입력전압의 변동과, 발광다이오드의 갯수에 관계없이 일정한 전류를 다수의발광다이오드(LED)에 공급하는 것을 특징으로 하는 발광다이오드 교류위상제어 구동장치.The method according to claim 1, wherein the current flowing through the plurality of light emitting diodes (LEDs) is detected, the phases of the AC input voltages are compared, and a control signal for controlling the phases of the input AC power source is generated to phase-control by Triac or SCR. A light emitting diode AC phase control driving apparatus comprising supplying a constant current to a plurality of light emitting diodes (LEDs) regardless of a change in voltage and the number of light emitting diodes. 제1항에 있어서 아날로그입력신호 또는 광센서(CDS)를 연결하여 차동증폭기(OPAMP)로 기준신호와 비교, 제어신호를 만들어 제어함으로서 주위 밝기에 따른 ON/OFF가 가능하고, 외부입력(SW또는디밍)에 따라 펄스폭 변조신호로 발광다이오드(LED)의 밝기를 조절할 수 있는것을 특징으로 하느 발광다이오드 교류위상제어 구동장치.According to claim 1, by connecting an analog input signal or a photo sensor (CDS) by comparing the reference signal with a differential amplifier (OPAMP) to make a control signal and to control the ON / OFF according to the ambient brightness, the external input (SW or Light emitting diode AC phase control driving device, characterized in that the brightness of the light emitting diode (LED) can be controlled by a pulse width modulated signal according to dimming).
KR1020080102529A 2008-10-20 2008-10-20 POWER SUPPLY for driving LED KR101021780B1 (en)

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KR101146100B1 (en) * 2010-06-21 2012-05-16 성일테크 주식회사 Surface emitting lighting for railway vehicles
KR101402301B1 (en) * 2011-12-13 2014-06-03 (주) 이노비전 Driving circuit of led lighting apparatus
CN104427709B (en) * 2013-09-09 2019-07-02 海洋王（东莞）照明科技有限公司 Intrinsic safety type LED drive circuit and lamps and lanterns
KR101472727B1 (en) * 2013-12-05 2014-12-24 (주) 코콤 Phase-controlled dimming LED Power Supply

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