KR20110084606A - Led lighting circuit with stabilizer for fluorescent lamp of boost-up type - Google Patents

Led lighting circuit with stabilizer for fluorescent lamp of boost-up type Download PDF

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Publication number
KR20110084606A
KR20110084606A KR1020100004248A KR20100004248A KR20110084606A KR 20110084606 A KR20110084606 A KR 20110084606A KR 1020100004248 A KR1020100004248 A KR 1020100004248A KR 20100004248 A KR20100004248 A KR 20100004248A KR 20110084606 A KR20110084606 A KR 20110084606A
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South Korea
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ballast
capacitor
led lighting
fluorescent lamp
impedance
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KR1020100004248A
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Korean (ko)
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안정수
한재현
이경한
김기원
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(주)중앙 엔룩스
안정수
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Publication of KR20110084606A publication Critical patent/KR20110084606A/en

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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]
    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • 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

PURPOSE: An LED lighting circuit using a ballast stabilizer for a fluorescent lamp applying a boost-up method is provided to enable to use the ballast stabilizer for the fluorescent lamp as for an LED lamp, thereby increasing efficiency by performing a normal operation without a separate ballast stabilizer. CONSTITUTION: An AC power source of a ballast stabilizer(1) for a fluorescent lamp is inputted in bridges(2,3). An impedance correction unit(10) and a capacitor(C) are connected between output lines of bridges in series. A DC-DC converter(4) is connected in both ends of the capacitor. An LED1, LED2, and LED3 are turned on by an output of the DC-DC converter.

Description

부스트업 방식을 적용한 형광등용 안정기를 이용한 ＬＥＤ 점등회로{LED lighting circuit with stabilizer for fluorescent lamp of boost-up type}LED lighting circuit with stabilizer for fluorescent lamp of boost-up type

본 발명은 LED 점등회로에 종래의 형광등용 안정기를 안정적으로 사용할 수 있도록 하는 형광등용 안정기를 이용한 LED 점등회로에 관한 것이다.The present invention relates to an LED lighting circuit using a fluorescent ballast for stably using a conventional ballast for fluorescent lamps in the LED lighting circuit.

도 1은 종래의 LED 점등회로를 설명하는 회로도이다.1 is a circuit diagram illustrating a conventional LED lighting circuit.

형광등용 안정기(1)로부터 입력되는 교류전압은 전파정류 브리지(2), (3)에 입력되고, 이들로부터 정류된 전압은 커패시터(C)에서 평활되어 DC-DC 컨버터(4)에 입력되고, DC-DC 컨버터(4)에서 LED1, LED2, LED3를 점등시키는 소정의 전압 12V 또는 24V로 강압되어 인가된다.AC voltage input from the ballast for fluorescent lamp 1 is input to full-wave rectification bridge (2), (3), the rectified voltage from these are smoothed in the capacitor (C) and input to the DC-DC converter (4), The DC-DC converter 4 is stepped down and applied to a predetermined voltage 12V or 24V for lighting LED1, LED2, and LED3.

이때 형광등용 안정기(1)는 형광등을 점등시키기 위하여 설계된 안정기로 내부에 공진회로와 보호회로 등이 구비되고, 형광등 부하측의 매칭 임피이던스(Zo)에 적합하게 설계되나, 이러한 형광등용 안정기(1)의 부하로 DC-DC 컨버터(4)와 LED들이 연결될 때는 형광등 부하의 매칭 임피이던스(Zo) 보다 낮아지기 때문에 임피이던스 정합이 일어나지 않기 때문에 형광등용 안정기(1)의 공진회로와 보호회로에 악 영향을 주게 되어 전력효율이 낮아지게 되거나 과열 및 소손이 발생하게 된다.In this case, the ballast for fluorescent lamps 1 is a ballast designed to light a fluorescent lamp, and includes a resonant circuit and a protection circuit therein, and is designed to be suitable for matching impedance Z o on the fluorescent load side, but such a ballast for fluorescent lamps 1 When the DC-DC converter 4 and the LEDs are connected with a load of, the impedance is lower than the matching impedance of the fluorescent load (Z o ), so that impedance matching does not occur, thereby adversely affecting the resonance circuit and the protection circuit of the fluorescent ballast 1. As a result, the power efficiency is lowered or overheating and burnout occur.

본 발명은 이러한 문제점을 해결하기 위한 것으로, 본 발명은 형광등용 안정기를 LED 점등회로로 사용하는 경우에 형광등용 안정기의 부하측 임피이던스가 정합되도록 함으로써 기존의 형광등용 안정기를 이용하여 고효율로 LED를 점등시키도록 하기 위한 것이다.The present invention is to solve this problem, the present invention is to use the fluorescent lamp ballast when the load side impedance of the fluorescent ballast is matched when using the LED ballast circuit to turn on the LED with high efficiency using the conventional fluorescent ballast. It is intended to be.

상기 과제를 해결하기 위한 해결수단은 형광등용 안정기로부터 교류전원을 공급받아 LED들을 점등시키는 형광등용 안정기를 이용한 LED 점등회로에 있어서: 상기 형광등용 안정기로부터 공급되는 교류전원을 정류하는 브리지; 상기 브리지의 출력단 사이에 직렬 연결되는 임피이던스 보정부와 커패시터; 상기 커패시터의 양단에 연결되어 DC 전원을 공급받아 상기 LED들이 점등되도록 전원을 공급하는 DC-DC 컨버터를 포함하는 것이다.A solution for solving the above problems is a LED lighting circuit using a fluorescent ballast for lighting LEDs by receiving AC power from a ballast for fluorescent lamps, comprising: a bridge for rectifying the AC power supplied from the ballast for fluorescent lamps; An impedance correction unit and a capacitor connected in series between the output terminals of the bridge; And a DC-DC converter connected to both ends of the capacitor and supplied with DC power to supply power to the LEDs.

또한 본 발명에서 상기 임피이던스 보정부는 상기 브리지 출력단과 상기 커패시터 사이에 직렬연결되는 인덕턴스와 다이오드로 이루어지는 것이 바람직하다.In addition, in the present invention, the impedance correction unit is preferably made of an inductance and a diode connected in series between the bridge output terminal and the capacitor.

상기 과제와 해결수단을 갖는 본 발명에 따르면, 형광등용 안정기를 LED 조명용 안정기로 사용할 수 있기 때문에 별도의 안정기를 구비할 필요가 없다.According to the present invention having the above problems and solutions, it is not necessary to provide a separate ballast because the ballast for fluorescent lamps can be used as a ballast for LED lighting.

또한 형광등용 안정기에 대한 부하측의 임피이던스를 매칭시키기 때문에 형광등용 안정기의 공진회로 및 보호회로가 정상적인 동작을 수행하도록 하여 효율을 높일 수 있으며, 소손등의 사고를 미연에 방지할 수 있다.In addition, since the impedance of the load side to the fluorescent ballast is matched, the resonant circuit and the protection circuit of the fluorescent ballast can perform normal operation to increase the efficiency and can prevent accidents such as burnout.

도 1은 종래의 LED 점등회로를 설명하는 회로도이다.
도 2는 본 발명의 일실시예를 설명하기 위한 회로도이다.
도 3은 본 발명의 일실시예에서 전압 개선효과를 개시하는 파형도이다.1 is a circuit diagram illustrating a conventional LED lighting circuit.
2 is a circuit diagram for explaining an embodiment of the present invention.
3 is a waveform diagram illustrating a voltage improving effect in one embodiment of the present invention.

이하 첨부된 도면에 따라서 본 발명의 실시예를 상세히 설명하기로 한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 일실시예를 설명하기 위한 회로도이고, 도 3은 본 발명의 일실시예에서 전압 개선효과를 개시하는 파형도이다.FIG. 2 is a circuit diagram illustrating an embodiment of the present invention, and FIG. 3 is a waveform diagram illustrating a voltage improving effect in an embodiment of the present invention.

브리지(2), (3)에는 형광등용 안정기(1)의 교류전원이 입력되고, 브리지(2), (3)의 출력선들 사이에는 임피이던스 보정부(10)와 커패시터(C)가 직렬연결되고, 커패시터(C)의 양단에는 DC-DC 컨버터(4)가 연결되며, DC-DC 컨버터(4)의 출력에 의하여 LED1, LED2, LED3는 점등된다.The AC power supply of the ballast 1 for fluorescent lamps is input to the bridges 2 and 3, and the impedance correction unit 10 and the capacitor C are connected in series between the output lines of the bridges 2 and 3. The DC-DC converter 4 is connected to both ends of the capacitor C, and LED1, LED2, and LED3 are turned on by the output of the DC-DC converter 4.

이때 임피이던스 보정부(10)는 인덕터(L1)와 다이오드(D1)가 직렬연결되어 이루어진다.In this case, the impedance correction unit 10 is formed by connecting the inductor L1 and the diode D1 in series.

도 3에 도시된 바와 같이 브리지(2), (3)에서 출력되는 파형은 전파정류된 것으로 점선①과 같은 맥류가 형성되고, 임피이던스 보정부(10)가 없이 브리지(2), (3)의 출력선에 단순히 커패시터(C)만이 연결되어 있는 경우에는 점선②와 같이 심한 리플을 같은 전압 곡선이 형성된다. 이때의 평균 직류전압은 Vo이다. 그러나 임피이던스 보정부(10)가 브리지(2), (3)의 출력선과 커패시터(C)에 연결되면 리플량이 더욱 감소되어 실선③과 같은 파형을 얻게 된다. 이는 입력되는 전원이 임피이던스 보정부의 인덕터(L1)를 통해서 커패시터(C)에 충전되고, 인덕터(L1)는 커패시터(C)의 급격한 전압변화를 방지하도록 부스트 하도록 함으로써 임피이던스 보정부(10)가 설치될 때의 브리지(2), (3)의 출력선은 Vo보다 높은 V1으로 되어 결국 이때의 브리지(2), (3)에 대한 입력 임피이던스가 임피이던스 보정부(10)가 없을 때 보다 상향되게 된다.As shown in FIG. 3, the waveforms output from the bridges 2 and 3 are full-wave rectified to form a pulsation such as a dotted line ①, and without the impedance correction unit 10, If only the capacitor (C) is connected to the output line, the same voltage curve is formed with a severe ripple like the dotted line ②. The average DC voltage at this time is V o . However, when the impedance correction unit 10 is connected to the output lines of the bridges 2 and 3 and the capacitor C, the ripple amount is further reduced to obtain a waveform such as a solid line ③. This is because the input power is charged to the capacitor C through the inductor L1 of the impedance correction unit, and the inductor L1 is boosted to prevent a sudden voltage change of the capacitor C. Thus, the impedance correction unit 10 is installed. The output lines of the bridges 2 and 3 become V 1 higher than V o so that the input impedance to the bridges 2 and 3 at this time is higher than when the impedance correction unit 10 is absent. Will be.

임피이던스 보정부의 임피이던스(ZL)는 임피이던스 보정부(10)가 없을 때 브리지(2), (3)에 대한 입력 임피이던스(ZIN)와 형광등용 안정기(10)의 정합 임피이던스(ZMA)에 따라서 결정된다. 즉 임피이던스 보정부의 임피이던스(ZL)는 정합 임피이던스(ZMA) = 입력 임피이던스(ZIN) + 임피이던스 보정부의 임피이던스(ZL)가 성립되도록 결정된다.The impedance (Z L ) of the impedance correction unit is equal to the input impedance (Z IN ) for the bridges (2) and (3) and the matching impedance (Z MA ) of the fluorescent ballast 10 when the impedance correction unit 10 is not present. Is determined. That is impedance (Z L) of the impedance correction unit is determined to be the matching impedance (Z MA) = the input impedance (Z IN) + The impedance correction impedance (Z L) is established in the.

Claims (2)

형광등용 안정기로부터 교류전원을 공급받아 LED들을 점등시키는 형광등용 안정기를 이용한 LED 점등회로에 있어서:
상기 형광등용 안정기로부터 공급되는 교류전원을 정류하는 브리지;
상기 브리지의 출력단 사이에 직렬 연결되는 임피이던스 보정부와 커패시터;
상기 커패시터의 양단에 연결되어 DC 전원을 공급받아 상기 LED들이 점등되도록 전원을 공급하는 DC-DC 컨버터를 포함하는 것을 특징으로 하는 형광등용 안정기를 이용한 LED 점등회로. In the LED lighting circuit using a fluorescent ballast for lighting the LEDs by receiving AC power from the fluorescent ballast:
A bridge for rectifying AC power supplied from the ballast for fluorescent lamps;
An impedance correction unit and a capacitor connected in series between the output terminals of the bridge;
And a DC-DC converter connected to both ends of the capacitor and supplied with DC power to supply the LEDs so that the LEDs are turned on. 청구항 1에서, 상기 임피이던스 보정부는 상기 브리지 출력단과 상기 커패시터 사이에 직렬연결되는 인덕턴스와 다이오드로 이루어지는 것을 특징으로 하는 형광등용 안정기를 이용한 LED 점등회로.The LED lighting circuit of claim 1, wherein the impedance correction unit comprises an inductance and a diode connected in series between the bridge output terminal and the capacitor.
KR1020100004248A 2010-01-18 2010-01-18 Led lighting circuit with stabilizer for fluorescent lamp of boost-up type KR20110084606A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101372009B1 (en) * 2013-04-25 2014-03-07 최남규 Circuitry for led illumination apparatus and printed circuit board
CN103929858A (en) * 2014-04-15 2014-07-16 刘坚 LED fluorescent tube and illumination lamp driven by fluorescent lamp electronic ballast
US9055636B2 (en) 2012-09-24 2015-06-09 Samsung Electronics Co., Ltd. Light source driving device and illuminating apparatus using the same
US9439250B2 (en) 2012-09-24 2016-09-06 Samsung Electronics Co., Ltd. Driving light emitting diode (LED) lamps using power received from ballast stabilizers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9055636B2 (en) 2012-09-24 2015-06-09 Samsung Electronics Co., Ltd. Light source driving device and illuminating apparatus using the same
US9439250B2 (en) 2012-09-24 2016-09-06 Samsung Electronics Co., Ltd. Driving light emitting diode (LED) lamps using power received from ballast stabilizers
KR101372009B1 (en) * 2013-04-25 2014-03-07 최남규 Circuitry for led illumination apparatus and printed circuit board
CN103929858A (en) * 2014-04-15 2014-07-16 刘坚 LED fluorescent tube and illumination lamp driven by fluorescent lamp electronic ballast
CN103929858B (en) * 2014-04-15 2015-11-25 刘坚 The LED fluorescent lamp tube utilizing electronic ballast for fluoresent lamp to drive and lighting

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