KR20060098345A - Apparatus and circuit for lighting - Google Patents

Apparatus and circuit for lighting Download PDF

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KR20060098345A
KR20060098345A KR1020060076391A KR20060076391A KR20060098345A KR 20060098345 A KR20060098345 A KR 20060098345A KR 1020060076391 A KR1020060076391 A KR 1020060076391A KR 20060076391 A KR20060076391 A KR 20060076391A KR 20060098345 A KR20060098345 A KR 20060098345A
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South Korea
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voltage
current
led
detector
load
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KR1020060076391A
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Korean (ko)
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KR100767385B1 (en
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윤재필
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주식회사 엠앤씨라이팅
(주)시앤텍
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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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

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

Abstract

본 발명은 조명 구동장치 및 그 회로도에 관한 것으로, 교류입력부에서 교류전압을 입력받아 직류전압으로 정류하는 정류부(10)와; 상기 정류부(10)에서 발생되는 미세한 누설전류를 DC부하(80)로 흐르는 것을 차단하는 저전압검출부(20)와; 상기 DC부하(80)에 입력전압의 변동에 따른 일정한 출력을 위하여 전압의 변동에 따른 전류의 특성을 변화시키는 고전압검출부(30)와; 주위온도의 상승시 LED의 밝기가 저하되는 것을 방지하고, 전류를 온도변화에 따라 상승시켜 밝기를 일정하게 유지 및 과전류를 차단하는 주위환경검출부(40)와; 전류를 전압으로 변환 및 전압을 검출하여, 음극과 양극의 전압을 제어하는 전류검출부(50)와; 상기 저전압검출부(20)와 고전압검출부(30), 주위환경검출부(40) 및 전류검출부(50)의 값을 받아 DC부하(80)를 제어하는 환경제어부(60)와; 상기 제어된 전압을 게이트를 통하여 Drain과 Source의 전류를 제어하는 구동부(70)와; 상기 구동부(70)에 의해 LED를 제어하는 DC부하(80)를 포함한다. 따라서, 주위온도의 상승시 LED의 밝기가 저하되는 것을 방지하고, 전류를 온도변화에 따라 상승시켜 밝기를 일정하게 유지 및 과전류를 차단하는 효과가 있다.The present invention relates to a lighting drive device and a circuit diagram thereof, comprising: a rectifying unit (10) for receiving an AC voltage from an AC input unit and rectifying the DC voltage; A low voltage detection unit 20 for blocking a small leakage current generated by the rectifier 10 from flowing to the DC load 80; A high voltage detector 30 for changing a characteristic of a current according to a voltage change for a constant output according to a change in an input voltage to the DC load 80; An ambient environment detection unit 40 which prevents the brightness of the LED from decreasing when the ambient temperature rises, and maintains the brightness constant and blocks the overcurrent by raising the current according to the temperature change; A current detector 50 for converting a current into a voltage and detecting a voltage to control voltages of the cathode and the anode; An environmental controller 60 for controlling the DC load 80 by receiving values of the low voltage detector 20, the high voltage detector 30, the ambient environment detector 40, and the current detector 50; A driver 70 for controlling the current of the drain and the source through the gate of the controlled voltage; It includes a DC load 80 to control the LED by the drive unit 70. Therefore, the brightness of the LED is prevented from being lowered when the ambient temperature is increased, and the current is increased according to the temperature change, thereby maintaining the brightness constant and blocking the overcurrent.

정류부, 전압검출부, 전류검출부, DC부하, 구동부 Rectifier, voltage detector, current detector, DC load, driver

Description

조명 구동장치 및 그 회로{Apparatus And Circuit For Lighting}Lighting drive and its circuit {Apparatus And Circuit For Lighting}

도 1은 종래의 스위칭레귤레이터(SMPS)의 원리도.1 is a principle diagram of a conventional switching regulator (SMPS).

도 2는 종래의 SMPS 방식의 LED 주위 온도대 밝기의 변화를 나타낸 도면.2 is a view showing a change in brightness of the ambient temperature LED of the conventional SMPS system.

도 3은 본 발명에 따른 조명 구동장치의 구성도.3 is a block diagram of a lighting drive device according to the present invention.

도 4는 본 발명에 따른 조명 구동장치의 검출부 실시예.4 is an embodiment of a detection unit of the lighting driving apparatus according to the present invention.

도 5는 본 발명에 따른 조명 구동장치의 회로도.5 is a circuit diagram of a lighting drive device according to the present invention.

<도면의 주요 부분에 대한 부호 설명><Description of the symbols for the main parts of the drawings>

10 : 정류부 20 : 저전압검출부10: rectifier 20: low voltage detector

30 : 고전압검출부 40 : 주위환경검출부30: high voltage detector 40: ambient environment detector

50 : 전류검출부 60 : 환경제어부50: current detector 60: environmental control unit

70 : 구동부 80 : DC부하70: drive unit 80: DC load

본 발명은 조명 구동장치 및 그 회로에 관한 것으로, 더욱 세부적으로는 에너지 절감과 환경오염을 방지하기 위하여 형광 및 할로겐전구를 LED로 대체하기 위한 조명 구동장치 및 그 회로에 관한 것이다.The present invention relates to a light drive device and a circuit thereof, and more particularly to a light drive device and a circuit for replacing the fluorescent and halogen bulbs with LEDs in order to save energy and prevent environmental pollution.

도 1은 종래의 스위칭레귤레이터(SMPS)의 원리도로써, 입력되는 교류전원을 정류부에서 교류를 직류로 변환하고, 펄스폭제어회로는 귀환증폭기의 출력을 포토커플러로 받고, 펄스폭 제어회로는 LED부하 전압이 높은 경우 펄스폭을 좁게하고, LED부하 전압이 낮은 경우 펄스폭을 넓게 한다. 상기와 같이 제어된 펄스폭으로 트랜지스터를 구동하고, 이 펄스 폭에 비례한 펄스를 변압기에 부여하여 LED부하에 전압을 일정하게 유지한다.1 is a principle diagram of a conventional switching regulator (SMPS), the AC power input from the rectifier converts AC to DC, the pulse width control circuit receives the output of the feedback amplifier to the photocoupler, the pulse width control circuit LED If the load voltage is high, narrow the pulse width. If the LED load voltage is low, wide the pulse width. The transistor is driven with the pulse width controlled as described above, and a pulse proportional to the pulse width is applied to the transformer to maintain a constant voltage at the LED load.

그러나, 상기와 같은 구성의 SMPS 안정기는 스위칭과정에서 전자파 잡음을 많이 유발하고, LED를 직렬과 병렬로 조합시 LED의 순방향 전압은 부품 개별적으로 2.0V에서 2.5V까지의 오차를 가지고 있어서 부하전류1과 부하전류2에 흐르는 전류가 상이하여 각각의 LED에 밝기가 일정하지 못하고, LED의 순방향 전압이 낮은 부품으로 구성된 LED의 선로는 과전류가 유입되어 수명이 단축되고, 순방향 전압이 높은 LED로 구성된 선로는 전류의 양이 적어서 밝기가 약하다.However, the SMPS ballast of the above configuration causes a lot of electromagnetic noise during the switching process, and when the LEDs are combined in series and in parallel, the forward voltage of the LEDs has errors from 2.0V to 2.5V individually, so that the load current 1 Since the current flowing in the overload current 2 is different, the brightness of each LED is not constant, and the LED line composed of parts with low LED forward voltage shortens the life due to the inflow of overcurrent, and the line consists of LED with high forward voltage. The brightness is low because the amount of current is small.

따라서, SMPS 방식을 적용하면 제조시에 LED 개별의 순방향 전압을 검사하여 동일한 특성을 지닌 LED만으로 조합해야하는 불편함이 있다.Therefore, when the SMPS method is applied, it is inconvenient to check the forward voltage of individual LEDs at the time of manufacture and combine them only with LEDs having the same characteristics.

도 2는 LED 주위 온도대 밝기의 변화를 나타낸 도면으로, LED에 일정한 전류를 인가하는 조건에서 주위온도가 상승하면 밝기가 저하되는 것이 일반적인 조명용 LED의 특성이므로, 기존 SMPS 방식의 LED안정기는 온도의 상승에 따라 밝기가 저하되는 현상이 있다.Figure 2 is a view showing the change in the ambient temperature of the LED brightness, since the brightness is lowered when the ambient temperature rises under the condition of applying a constant current to the LED, since the characteristics of the general lighting LED, the conventional SMPS type LED ballast is There is a phenomenon that the brightness decreases as it rises.

상술한 바와 같은 문제점을 해결하기 위하여, 본 발명은 솔리드스테이트 릴레이(Solid State Relay)로 스위칭되는 교류입력부에서 발생되는 미세한 누설전류를 DC부하로 흐르는 것을 차단하고, 상기 DC부하에 입력전압의 변동에 따른 일정한 출력(LED 조도)을 위하여 전압의 변동에 따른 전류의 특성을 변화시키는 조명 구동장치 및 그 회로를 제공하는데 목적이 있다.In order to solve the problems as described above, the present invention is to block the flow of the minute leakage current generated in the AC input unit is switched to the solid state relay (DC) load to the DC load, and to the variation of the input voltage to the DC load It is an object of the present invention to provide a lighting driving device and a circuit for changing a characteristic of a current according to a voltage change for a constant output (LED illuminance).

본 발명의 다른 목적으로는 주위온도의 상승시 LED의 밝기가 저하되는 것을 방지하고, 전류를 온도변화에 따라 상승시켜 밝기를 일정하게 유지 및 과전류를 차단하고, 전류를 전압으로 변환 및 전압을 검출하여, 음극(Cathode)과 양극(Anode)의 전압을 제어하는 조명 구동장치 및 그 회로를 제공한다.Another object of the present invention is to prevent the brightness of the LED is lowered when the ambient temperature rises, to increase the current according to the temperature change to maintain the constant brightness and to block the overcurrent, to convert the current into voltage and detect the voltage The present invention provides a lighting driver and a circuit for controlling voltages of a cathode and an anode.

목적을 달성하기 위한 구성으로는,In the structure to achieve the purpose,

교류입력부에서 교류전압을 입력받아 직류전압으로 정류하는 정류부와; 상기 정류부에서 발생되는 미세한 누설전류를 DC부하로 흐르는 것을 차단하는 저전압검출부와; 상기 DC부하에 입력전압의 변동에 따른 일정한 출력(LED 조도)을 위하여 전압의 변동에 따른 전류의 특성을 변화시키는 고전압검출부와; 주위온도의 상승시 LED의 밝기가 저하되는 것을 방지하고, 전류를 온도변화에 따라 상승시켜 밝기를 일정하게 유지 및 과전류를 차단하는 주위환경검출부와; 전류를 전압으로 변환 및 전압을 검출하여, 음극(Cathode)과 양극(Anode)의 전압을 제어하는 전류검출부와; 상기 저전압검출부와 고전압검출부, 주위환경검출부 및 전류검출부의 값을 받아 DC 부하를 제어하는 환경제어부와; 상기 제어된 전압을 게이트(Gate)를 통하여 Drain과 Source의 전류를 제어하는 구동부와; 상기 구동부에 의해 LED를 제어하는 DC부하를 포함한다.A rectifying unit receiving an AC voltage from the AC input unit and rectifying the DC voltage; A low voltage detector for blocking a minute leakage current generated by the rectifier from flowing to the DC load; A high voltage detector for changing a characteristic of a current according to a voltage change for a constant output (LED illuminance) according to a change in an input voltage to the DC load; An ambient environment detection unit which prevents the brightness of the LED from decreasing when the ambient temperature rises and maintains the brightness constant and blocks the overcurrent by raising the current according to the temperature change; A current detector for converting a current into a voltage and detecting a voltage to control voltages of a cathode and an anode; An environmental controller for controlling a DC load by receiving values of the low voltage detector, the high voltage detector, the ambient environment detector, and the current detector; A driving unit controlling the current of the drain and the source through the gate with the controlled voltage; It includes a DC load for controlling the LED by the drive unit.

본 발명의 다른 특징으로서, 상기 환경제어부는 션트 레귤레이터(Shunt Regulator)를 사용한다.As another feature of the invention, the environmental control unit uses a shunt regulator (Shunt Regulator).

본 발명의 또 다른 특징으로서, 전원공급부(CON1)로부터 교류전원이 입력되어 과전류를 차단하는 FUSE와 교류전원을 직류전원으로 정류하는 브릿지다이오드(D1)가 연결되고, 상기 브릿지다이오드(D1)의 출력단에는 미세전류를 차단하는 다이악(ZD1)과 전압의 변동에 따른 전류의 특성을 변화시키는 저항(R11)이 병렬 연결되어 션트 레귤레이터(Shunt Regulator)와 연결되고, 상기 션트 레귤레이터(Shunt Regulator)에는 주위온도에 따른 LED 밝기를 제어하는 써미스터(TH1,TH2)와 전압을 제어하는 저항(R8)과 바리스터(VR2)가 연결되어 제어된 전압을 게이트를 통하여 Drain과 Source의 전류를 제어하는 FET(Q1)과 연결되어 LED(CON2)와 연결된다.As another feature of the present invention, an AC power is input from the power supply unit CON1, and a fuse for blocking overcurrent and a bridge diode D1 for rectifying the AC power to a DC power source are connected, and an output terminal of the bridge diode D1 is connected. There is a diaak (ZD1) for blocking the micro current and a resistor (R11) for changing the characteristics of the current according to the voltage change is connected in parallel to the shunt regulator (Shunt Regulator), the shunt regulator Thermistors (TH1, TH2) for controlling the brightness of the LED according to temperature, the resistor (R8) and the varistor (VR2) for controlling the voltage is connected to the FET (Q1) for controlling the current of the drain and source through the gate of the controlled voltage It is connected with LED (CON2).

도 3은 본 발명에 따른 조명 구동장치의 구성도이고, 도 4는 본 발명에 따른 조명 구동장치의 검출부 실시예이고, 도 5는 본 발명에 따른 조명 구동장치의 회로도이다.3 is a configuration diagram of a lighting driving apparatus according to the present invention, FIG. 4 is an embodiment of a detection unit of the lighting driving apparatus according to the present invention, and FIG. 5 is a circuit diagram of the lighting driving apparatus according to the present invention.

이하, 도면을 참고로 구성요소를 설명하면 다음과 같다.Hereinafter, the components will be described with reference to the drawings.

도 3은 본 발명의 조명 구동장치의 구성도로써, 정류부(10)와 저전압검출부(20), 고전압검출부(30), 주위환경검출부(40), 전류검출부(50), 환경제어부(60), 구동부(70) 및 DC부하(80)로 구성된다.3 is a block diagram of the lighting driving apparatus of the present invention, the rectifier 10, the low voltage detector 20, the high voltage detector 30, the ambient environment detector 40, the current detector 50, the environmental controller 60, It consists of a drive unit 70 and a DC load (80).

상기 정류부(10)는 솔리드스테이트 릴레이(Solid State Relay)로 스위칭되는 교류입력부에서 교류전압을 입력받아 직류전압으로 정류하고, 상기 저전압검출부(20)는 DIAC 또는 TNR 등의 소자를 사용하여 부하의 전류 특성에 따른 교류입력부의 스위칭부에 솔리드스테이트 릴레이(Solid State Relay)를 적용시 누설 전류가 발생하여 DC부하(80)에 미세한 전류가 흐르게 되는데, 이를 방지하기 위하여 AC150V에서는 전류검출부(50)에 전압공급을 차단하게 되고, 상기 고전압검출부(30)는 상기 DC부하(80)에 입력전압의 변동에 따른 일정한 출력(LED 조도)을 위하여 전압의 변동에 따른 전류의 특성을 도 4와 같이 변화시킨다.The rectifier 10 receives an AC voltage from an AC input switched to a solid state relay and rectifies the DC voltage, and the low voltage detector 20 uses a device such as a DIAC or a TNR to load current. When a solid state relay is applied to the switching part of the AC input unit according to a characteristic, a leakage current is generated so that a minute current flows in the DC load 80. In order to prevent this, a voltage is applied to the current detector 50 at AC150V. The high voltage detection unit 30 changes the characteristics of the current according to the voltage change for a constant output (LED illuminance) according to the change of the input voltage to the DC load 80 as shown in FIG. 4.

상기 주위환경검출부(40)는 LED는 온도변화에 따른 밝기가 변하는 특성을 가지고 있어, 주위온도가 상승하면 밝기가 저하되는데, 이를 방지하기 위하여 TH1(Thermistor)를 설치하여 전류를 온도변화에 따라 상승시켜 밝기를 일정하게 유지하고, 주위온도가 제품의 사용 가능온도 이상으로 상승시 TH2가 동작하여 과전류를 차단하게 된다.The ambient environment detection unit 40 has a characteristic that the brightness of the LED changes according to the temperature change, the brightness decreases when the ambient temperature rises, in order to prevent this, install a TH1 (Thermistor) to increase the current according to the temperature change The brightness is kept constant, and when the ambient temperature rises above the usable temperature of the product, TH2 operates to block overcurrent.

상기 전류검출부(50)는 저항(R8)에 흐르는 전류를 전압으로 변환하여 D3(Programmable Shunt Regulator)의 Refernce에서 전압을 검출하여 음극과 양극의 전압을 제어하고, 상기 환경제어부(60)는 션트 레귤레이터(Shunt Regulator)를 사용하여 전압검출부(20)와 고전압검출부(30), 주위환경검출부(40) 및 전류검출부(50)의 값을 받아 DC부하(80)를 제어하고, 상기 구동부(70)는 환경제어부(60)에서 제어된 전압을 게이트(Gate)를 통하여 Drain과 Source의 전류를 제어하고, 상기 DC부하(80)는 구동부(70)에 의해 LED를 제어하게 된다.The current detector 50 converts a current flowing through the resistor R8 into a voltage to detect a voltage at a Refernce of a programmable shunt regulator (D3) to control voltages of the cathode and the anode, and the environmental controller 60 controls the shunt regulator. The DC load 80 is controlled by receiving the values of the voltage detector 20, the high voltage detector 30, the ambient environment detector 40, and the current detector 50 using a shunt regulator. The voltage controlled by the environmental controller 60 controls the current of the drain and the source through the gate, and the DC load 80 controls the LED by the driver 70.

도 5는 본 발명에 따른 조명 구동장치의 회로도로써, 전원공급부(CON1)로부터 교류전원이 입력되어 과전류를 차단하는 FUSE와 교류전원을 직류전원으로 정류하는 브릿지다이오드(D1)가 연결되고, 상기 브릿지다이오드(D1)의 출력단에는 미세전류를 차단하는 다이악(ZD1)과 전압의 변동에 따른 전류의 특성을 변화시키는 저항(R11)이 병렬 연결되어 션트 레귤레이터(Shunt Regulator)와 연결되고, 상기 션트 레귤레이터(Shunt Regulator)에는 주위온도에 따른 LED 밝기를 제어하는 써미스터(TH1,TH2)와 전압을 제어하는 저항(R8)과 바리스터(VR2)가 연결되어 제어된 전압을 게이트를 통하여 Drain과 Source의 전류를 제어하는 FET(Q1)과 연결되어 LED(CON2)와 연결된다.FIG. 5 is a circuit diagram of a lighting driving apparatus according to the present invention, in which an AC power is input from a power supply unit CON1 to block overcurrent, and a bridge diode D1 for rectifying the AC power to a DC power is connected. The output terminal of the diode D1 is connected to a shunt regulator in parallel with a diaak ZD1 for blocking a microcurrent and a resistor R11 for changing a characteristic of a current according to a voltage change, connected to a shunt regulator. (Shunt Regulator) is connected with thermistors (TH1, TH2) that control the brightness of LED according to ambient temperature, resistor (R8) and varistor (VR2) that control the voltage. It is connected to the controlling FET Q1 and connected to the LED CON2.

본 발명은 LED부하에 흐르는 전류를 제어함으로서 LED조명에 밝기 및 LED를 보호하는 회로로, 교류전원을 직류로 변환하는 정류다이오드(D1)을 설치하여 교류전원을 맥류로 변화시켜 주회로에 전원을 공급한다.The present invention is a circuit to protect the brightness and the LED in the LED lighting by controlling the current flowing through the LED load, by installing a rectifier diode (D1) for converting AC power into direct current by changing the AC power into a pulse current to supply power to the main circuit Supply.

상기 교류입력부의 스위칭을 솔리드스테이트 릴레이(Solid State Relay)로 사용할 때 발생되는 누설전류에 의한 오동작을 방지하기 위해서, 릴레이 자체의 누설전류에 의해 LED에 미세한 전류가 흐르는 것을 방지하기 위하여 다이악(ZD1)을 구성하고, 저항(R18)과 저항(R6)의 분배된 전압에 의해서 다이악(ZD1)에 항복전압(Breakdown)이 도달하면 LED구동용 트랜지스터(FET1)의 게이트(Gate)에 전류를 공급하여 상기 트랜지스터(FET1)의 드레인(Drain)과 소스(Source)간이 도통되어 LED에 전류가 흘러서 LED가 점등된다. 그러나 입력전압이 저항(R18)과 저항(R6) 및 다이악(ZD1)의 항복전압에 의해 누설전류 차단 전압(V-cut)은 아래의 수학식1에 의해 결정되고, 본 발명에서는 AC130V로 정하고 있다.In order to prevent malfunction due to leakage current generated when the switching of the AC input unit is used as a solid state relay, in order to prevent a minute current from flowing through the LED by the leakage current of the relay itself, When the breakdown voltage reaches the diac ZD1 by the divided voltages of the resistors R18 and R6, a current is supplied to the gate of the LED driving transistor FET1. Thus, the drain and the source of the transistor FET1 are turned on so that a current flows in the LED so that the LED is turned on. However, the leakage current cut-off voltage (V-cut) is determined by Equation 1 below due to the breakdown voltage of the resistor R18, the resistor R6, and the dia ZD1. have.

Figure 112006057684808-PAT00001
Figure 112006057684808-PAT00001

Vcut : 누설전류차단전압(V),Vcut: Leakage current cutoff voltage (V),

Vin : 전원 입력 전압(V),Vin: power input voltage (V),

Vbk : 다이악(Diac)의 항복전압(V)이다.Vbk: The breakdown voltage of Diac (V).

주위 밝기에 의한 LED의 밝기 조정은 LED구동용 트랜지스터(FET1)의 에너지가 클수록 저항값이 낮게 되며, 본 발명에서는 LED구동용 트랜지스터(FET1)의 게이트(Gate)에 전압을 Cds 광도전 셀(Cds Phontoconducive Cells)과 저항(R16, R6) 및 다이악(ZD1)의 조합으로 도통각을 가변하여, LED 밝기를 주위의 밝기에 따라 능동적으로 조절하도록 한다.In the brightness adjustment of the LED by the ambient brightness, the resistance value is lower as the energy of the LED driving transistor FET1 increases, and in the present invention, a voltage is applied to the gate of the LED driving transistor FET1, and the Cds photoconductive cell Cds is used. The combination of phontoconducive cells, resistors (R16, R6), and diaak (ZD1) varies the conduction angle, allowing the LED brightness to be actively adjusted to the ambient brightness.

상기 Cds 광도전 셀(Cds Phontoconducive Cells 이하 CDS라 칭함)은 황화카드뮴분말과 약간의 불순물을 자기(磁器) 또는 유리 기판위에 도포한 다음 이것을 500~700℃로 가열하여 소결한 소자로서, 내부 전기저항이 입사광 에너지에 대응하여 변화하므로, 입사광 에너지가 클수록 저항값이 낮게 된다.The Cds photoconductive cell (hereinafter referred to as CDS) is a device obtained by coating cadmium sulfide powder and some impurities on a magnetic or glass substrate and heating it to 500 to 700 ° C. Since the incident light energy changes in response, the larger the incident light energy, the lower the resistance value.

상기 주위의 밝기가 밝으면 제품의 외부에 설치된 CDS에 입사 광량이 증가하고, 광량의 변화에 따라 CDS의 전기 저항값이 낮아지고, CDS의 저항값이 낮아지면 저항(R16) 및 CDS와 병렬로 설치된 저항(R6)의 전압분배에 따라 다이악(ZD1)의 항 복전압이 도달하지 못하면 LED구동용 트랜지스터(FET1)의 게이드(Gate)에 전압이 인가되지 못하여 트랜지스터(FET1)에 드레인(Drain)과 소스(Source)간에 전류를 차단한다.If the ambient brightness is bright, the incident light amount increases on the CDS installed outside the product, and the electric resistance value of the CDS decreases according to the change of the light amount, and when the resistance value of the CDS decreases, the resistance (R16) and the CDS are paralleled. If the breakdown voltage of the diaak ZD1 does not reach according to the voltage distribution of the resistor R6 installed, the voltage is not applied to the gate of the LED driving transistor FET1 and the drain to the transistor FET1. Cut off the current between source and source.

또한, 주위의 밝기가 어두워지면 CDS에 입사 광량이 감소하고, CDS의 저항값이 높아지면, 저항(R16) 및 CDS와 병렬로 설치된 저항(R6)의 전압분배에 따라 다이악(ZD1)의 항복전압이 도달하고 LED구동용 트랜지스터(FET1)의 게이트(Gate)에 전압이 인가되어 트랜지스터(FET1)에 드레인(Drain)과 소스(Source)간에 전류가 흐른다. 주위의 밝기에 따라 LED의 발광량은 CDS에 입사되는 광량에 따라 다이악(ZD1) 전압이 변화하여 트랜지스터(FET1)를 위상제어 할 수 있다.In addition, when the ambient brightness becomes dark, the amount of incident light on the CDS decreases, and when the resistance value of the CDS increases, the yield of the diac ZD1 depends on the voltage distribution of the resistor R16 and the resistor R6 provided in parallel with the CDS. When the voltage reaches and a voltage is applied to the gate Gate of the LED driving transistor FET1, a current flows between the drain and the source in the transistor FET1. According to the brightness of the surroundings, the amount of light emitted from the LED is changed according to the amount of light incident on the CDS, thereby controlling phase control of the transistor FET1.

주위온도 변화에 따른 LED밝기 조정은 LED에 일정한 전류를 흐르게 하면 주위의 온도에 따라 밝기가 부(-)의 특성으로 온도가 올라가면 LED의 밝기가 저하됨을 알 수 있으며, 본 발명에서는 주위온도 변화에 따른 LED의 밝기를 일정하기 유지하기 위하여 써미스터(TH2)를 적용하는데, 다이오드(D1)에 의해 전파 정류된 맥류전원이 LED부하에 트랜지스터(FET1)의 드레인(Drain)과 소스(Source) 및 저항(R8)을 통하여 폐회로가 형성되어 전류가 흐르게 되며, LED에 흐르는 전류는 저항(R8)과 병렬 형성된 저항(R14, VR2, R7 등)에 비하여 매우 적으면 저항(R8)에 흐르는 전류(I-load)와 같다고 볼 수 있다.LED brightness adjustment according to the change of ambient temperature can be seen that the brightness of the LED decreases when the temperature rises due to the negative (-) characteristics according to the ambient temperature when a constant current flows through the LED, in the present invention, Thermistor TH2 is applied to keep the brightness of the LED constant, and the pulsed power supply rectified by the diode D1 is applied to the drain, source, and resistance of the transistor FET1 under the LED load. A closed circuit is formed through R8 to flow current, and when the current flowing through the LED is very small compared to the resistor R8 formed in parallel with the resistor R8, the current flowing through the resistor R8 (I-load). Can be regarded as

상기 저항(R8) 양단에 흐르는 전류(I-load)에 비례하는 전압(VR8)이 발생하고, 상기 전압(VR8)은 션트 레귤레이터(Shunt Regulator; SR1)의 REF(Reference)에 저항(R14, VR2, R2 등)을 통하여 전압(Vref)에 인가되고, LED부하에 흐르는 전류는 수학식 2에 의해 결정된다.A voltage VR8 proportional to the current I-load flowing across the resistor R8 is generated, and the voltage VR8 is applied to the resistors R14 and VR2 at REF (Reference) of the shunt regulator SR1. , R2, etc.) is applied to the voltage (Vref), the current flowing through the LED load is determined by the equation (2).

Figure 112006057684808-PAT00002
Figure 112006057684808-PAT00002

Iload : LED부하에 전류,Iload: current in LED load,

R8 : 전류검출저항,R8: current detection resistor,

Vref : 셔트레귤레이터의 기준전압이다.Vref: Reference voltage of the shutter regulator.

상기 수학식 2에서 LED부하에 흐르는 전류는 저항(R8)에 반비례하고, 본 발명에서는 저항(R8)에 병렬로 저항(R14, VR2, R7)과 온도 변화에 따라 부(-)의 저항온도계수 특성이 있는 써미스터(TH2)를 설치하여 주위의 온도가 상승하면 써미스터(TH2)와 직,병렬로 구성된 저항(R18, R14, R7, VR2, R8)에 합성저항이 감소하여 수학식 2에서 저항(R8)의 값이 적어지며, 그에따라 온도가 상승하면 LED부하에 전류를 상승시켜 LED에 밝기를 온도의 변화에 따라 불변한다.In Equation 2, the current flowing through the LED load is inversely proportional to the resistance R8, and in the present invention, a negative resistance temperature coefficient according to the resistances R14, VR2 and R7 and the temperature change in parallel to the resistance R8. When the ambient temperature rises by installing the thermistor TH2 with characteristics, the composite resistance decreases in the resistors R18, R14, R7, VR2, and R8 that are configured in series and in parallel with thermistor TH2. The value of R8) decreases, and as the temperature rises, the current increases to the LED load, thereby changing the brightness of the LED according to the change of temperature.

입력전압 변동에 따른 LED밝기의 변화 보정은 입력전압이 상승하면 누설전류에 의한 오동작 방지회로 및 주위 밝기에 의한 LED의 밝기조정회로에서 설명된 다이악(ZD1)의 차단 위상이 지연되어 LED부하에 흐르는 전류는 변화가 없으나 LED의 구동 위상각이 크게되어 LED가 정격전압에 비하여 밝아지는 현상이 있다.Correction of the change of LED brightness according to input voltage change is that when the input voltage rises, the blocking phase of DIAZ (ZD1) explained in the malfunction prevention circuit due to leakage current and the brightness adjustment circuit of LED due to ambient brightness is delayed, There is no change in the current flowing, but the driving phase angle of the LED is large, the LED is brighter than the rated voltage.

따라서, 본 발명에서는 입력전압 감지를 위하여 저항(R11)을 설치하고, 상기 저항(R11)에 교류전원을 다이오드(D1)에서 정류된 맥류전압을 저항(VR2, R2)을 통하여 셔트레귤레이터(SR)의 입력단자에 전압을 공하고, 상기 셔트레귤레이터(SR)의 입력단자에 인가되는 전압은 전원 전압감지 저항(R11)에 전압과 LED부하에 흐르는 전류를 감지하는 저항(R8)의 전압이 합성되어 지고, 이로써 셔트레귤레이터(SR)에 의해 제어되는 LED의 전류는 전압이 상승하면 LED에 도통각은 커지나 전류는 감소되어 밝기 및 실효값의 소비전류는 일정하게 된다.Therefore, in the present invention, a resistor R11 is provided for sensing the input voltage, and the AC voltage is supplied to the resistor R11 through the resistors VR2 and R2 through the shutter regulator SR. The voltage is supplied to the input terminal of the voltage, and the voltage applied to the input terminal of the shutter regulator (SR) is synthesized by the voltage of the resistor (R8) for sensing the current flowing through the LED load and the voltage to the power supply voltage sensing resistor (R11). As a result, the current of the LED controlled by the shutter regulator SR increases as the voltage increases, but the conduction angle of the LED increases, but the current decreases, so that the current consumption of the brightness and the effective value is constant.

상기한 바와 같이, 본 발명은 솔리드스테이트 릴레이(Solid State Relay)로 스위칭되는 교류입력부에서 발생되는 미세한 누설전류를 DC부하로 흐르는 것을 차단하고, 상기 DC부하에 입력전압의 변동에 따른 일정한 출력(LED 조도)을 위하여 전압의 변동에 따른 전류의 특성을 변화시키는 효과가 있다.As described above, the present invention blocks a small leakage current generated from an AC input unit switched to a solid state relay to the DC load, and outputs a constant output according to the change of the input voltage to the DC load (LED). Illuminance) has the effect of changing the characteristics of the current according to the voltage change.

또한, 주위온도의 상승시 LED의 밝기가 저하되는 것을 방지하고, 전류를 온도변화에 따라 상승시켜 밝기를 일정하게 유지 및 과전류를 차단하고, 전류를 전압으로 변환 및 전압을 검출하여, 음극(Cathode)과 양극(Anode)의 전압을 제어하는 효과가 있다.In addition, when the ambient temperature rises, the brightness of the LED is prevented from being lowered, the current is increased according to the temperature change, the brightness is kept constant and the overcurrent is cut off, the current is converted into a voltage, and the voltage is detected. ) And the voltage of the anode is effective.

Claims (3)

조명 구동장치에 있어서,In the lighting drive, 교류입력부에서 교류전압을 입력받아 직류전압으로 정류하는 정류부(10)와;A rectifying unit 10 receiving an AC voltage from the AC input unit and rectifying the DC voltage; 상기 정류부(10)에서 발생되는 미세한 누설전류를 DC부하(80)로 흐르는 것을 차단하는 저전압검출부(20)와;A low voltage detection unit 20 for blocking a small leakage current generated by the rectifier 10 from flowing to the DC load 80; 상기 DC부하(80)에 입력전압의 변동에 따른 일정한 출력(LED 조도)을 위하여 전압의 변동에 따른 전류의 특성을 변화시키는 고전압검출부(30)와;A high voltage detector (30) for changing a characteristic of a current according to a voltage change for a constant output (LED illuminance) according to a change in an input voltage to the DC load (80); 주위온도의 상승시 LED의 밝기가 저하되는 것을 방지하고, 전류를 온도변화에 따라 상승시켜 밝기를 일정하게 유지 및 과전류를 차단하는 주위환경검출부(40)와;An ambient environment detection unit 40 which prevents the brightness of the LED from decreasing when the ambient temperature rises, and maintains the brightness constant and blocks the overcurrent by raising the current according to the temperature change; 전류를 전압으로 변환 및 전압을 검출하여, 음극(Cathode)과 양극(Anode)의 전압을 제어하는 전류검출부(50)와;A current detector 50 for converting a current into a voltage and detecting a voltage to control voltages of a cathode and an anode; 상기 저전압검출부(20)와 고전압검출부(30), 주위환경검출부(40) 및 전류검출부(50)의 값을 받아 DC부하(80)를 제어하는 환경제어부(60)와;An environmental controller 60 for controlling the DC load 80 by receiving values of the low voltage detector 20, the high voltage detector 30, the ambient environment detector 40, and the current detector 50; 상기 제어된 전압을 게이트(Gate)를 통하여 Drain과 Source의 전류를 제어하는 구동부(70)와;A driver 70 for controlling the current of the drain and the source through the gate with the controlled voltage; 상기 구동부(70)에 의해 LED를 제어하는 DC부하(80)를 포함하는 것을 특징으로 하는 조명 구동장치.Lighting drive device characterized in that it comprises a DC load (80) for controlling the LED by the drive unit (70). 제 1항에 있어서,The method of claim 1, 상기 환경제어부(60)는 션트 레귤레이터(Shunt Regulator)를 사용하는 것을 특징으로 하는 조명 구동장치.The environmental control unit 60 is a lighting drive device, characterized in that using a shunt regulator (Shunt Regulator). 조명 구동장치의 회로도에 있어서,In the circuit diagram of the lighting drive device, 전원공급부(CON1)로부터 교류전원이 입력되어 과전류를 차단하는 FUSE와 교류전원을 직류전원으로 정류하는 브릿지다이오드(D1)가 연결되고, 상기 브릿지다이오드(D1)의 출력단에는 미세전류를 차단하는 다이악(ZD1)과 전압의 변동에 따른 전류의 특성을 변화시키는 저항(R11)이 병렬 연결되어 션트 레귤레이터(Shunt Regulator)와 연결되고, 상기 션트 레귤레이터(Shunt Regulator)에는 주위온도에 따른 LED 밝기를 제어하는 써미스터(TH1,TH2)와 전압을 제어하는 저항(R8)과 바리스터(VR2)가 연결되어 제어된 전압을 게이트를 통하여 Drain과 Source의 전류를 제어하는 FET(Q1)과 연결되어 LED(CON2)와 연결되는 것을 특징으로 하는 조명 구동장치 회로.AC power is input from the power supply unit CON1, and a fuse for blocking overcurrent and a bridge diode D1 for rectifying the AC power with a DC power supply are connected, and a diak for blocking fine current at the output terminal of the bridge diode D1. (ZD1) and a resistor (R11) for changing the characteristics of the current according to the voltage change is connected in parallel to the shunt regulator (Shunt Regulator), the shunt regulator (Shunt Regulator) to control the LED brightness according to the ambient temperature Thermistors TH1 and TH2, the resistor R8 and the varistor VR2, which control the voltage, are connected to the LED (CON2) by connecting the controlled voltage to the FET Q1 that controls the current of the drain and source through the gate. Lighting drive circuitry, characterized in that connected.
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