KR890000060B1 - Automatic dimmer circuit of fluorescent lamp - Google Patents

Automatic dimmer circuit of fluorescent lamp Download PDF

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KR890000060B1
KR890000060B1 KR1019850004605A KR850004605A KR890000060B1 KR 890000060 B1 KR890000060 B1 KR 890000060B1 KR 1019850004605 A KR1019850004605 A KR 1019850004605A KR 850004605 A KR850004605 A KR 850004605A KR 890000060 B1 KR890000060 B1 KR 890000060B1
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South Korea
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fluorescent lamp
resistor
terminal
transistor
choke coil
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KR1019850004605A
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Korean (ko)
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KR870000844A (en
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박선동
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박선동
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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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light

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  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Rectifiers (AREA)

Abstract

The circuit adjusts current applied to a fluorescent lamp through the control of a variable resistor by a user or by a photoconductive element sensing the light illumination of environs for automatic light adjustment. Power source terminals (A,B) connect via resistor (R1), bridge diode (2) and resistor (R2) to constant voltage diode, whose connecting node connecting via resistor (R3), variable resistor (VR) and integrated circuits (IC1-4) to the base of transistor (TR), the output of bridge diode (2) connecting via capacitor (C2), photoconductive sensor (CDS), switch (SW2), capacitor (C3) to the base of TR, whose collector and emitter resp. connecting to source (A) and choke coil middle terminal.

Description

형광등의 자동 조광회로Automatic lighting circuit of fluorescent lamp

제1도는 본 고안의 자동 조광회로도.1 is an automatic dimming circuit diagram of the present invention.

제2도는 트랜지스터의 듀티비파형도로서 (a)는 최상점의 듀티비 파형도 (b)는 가변저항 및 광도전소자에 의해 제어될 경우의 듀티비 파형도.2 is a duty ratio waveform diagram of a transistor, (a) is a duty ratio waveform diagram of the highest point, and (b) is a duty ratio waveform diagram when it is controlled by a variable resistor and a photoconductive element.

제3도는 난반사에 의한 광도전소자의 저항값 변화를 보인 파형도로서 (a)는 콘덴서를 접속하지 않았을 경우의 파형도 (b)는 콘덴서를 접속하였을 경우의 파형도.3 is a waveform diagram showing a change in the resistance value of the photoconductive element due to diffuse reflection, (a) is a waveform diagram when no capacitor is connected, and (b) is a waveform diagram when the capacitor is connected.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 형광등 2 : 브리지 다이오드1: fluorescent lamp 2: bridge diode

PT : 트랜스 L1: 일차코일PT: Trans L 1 : Primary Coil

L2, L3: 이차코일 CT : 초크코일L 2 , L 3 : Secondary coil CT: Choke coil

C1-C3: 콘덴서 D1-D4: 다이오드C 1 -C 3 : Capacitor D 1 -D 4 : Diode

R1-R3: 저항 ZD : 정전압 다이오드R 1 -R 3 : Resistor ZD: Constant Voltage Diode

VR : 가변저항 IC1-IC4: 반전용 집적소자VR: Variable resistor IC 1 -IC 4 : Inverting integrated device

TR : 트랜지스터 CDS : 광도전소자TR: Transistor CDS: Photoconductor

SW : 스위치 A, B : 전원단자SW: Switch A, B: Power terminal

AC : 교류전원AC: AC power

본 발명은 형광등에 있어서, 혀광등으로 흐르는 전류를 제어하여 형광등의 밝기를 임의로 조절함은 물론 햇빛 또는 다른 불빛에 따른 형광등 주변의 조도에 따라 형광등의 밝기가 자동으로 조절되게한 형광등의 자동조광 회로에 관한 것이다.The present invention, in the fluorescent lamp, by controlling the current flowing through the tongue lamp to adjust the brightness of the fluorescent lamp arbitrarily, as well as the automatic light control circuit of the fluorescent lamp to automatically adjust the brightness of the fluorescent lamp according to the illumination of the fluorescent lamp according to sunlight or other lights It is about.

종래의 조광회로에는 전압 및 전류를 제어하여 백열등의 밝기를 조절하는 백열등 조광회로가 있었을 뿐이고, 방전을 이용하여 점등되는 형광등에는 조광회로가 없었으므로 사용자는 주변의 조도에 관계없이 항상 일정한 밝기로 형광등을 점등시켜야 되어 필요없이 많은 전력이 소비되는 결함이 있었다.In conventional lighting circuits, there was only an incandescent light dimming circuit that controls the brightness of an incandescent lamp by controlling voltage and current, and there is no dimming circuit in fluorescent lamps that are lit by using discharge. There was a defect that needed to be turned on, so much power was consumed without need.

본 발명은 이와같은 종래의 결함을 감안하여, 사용자가 가변저항을 가변함에 따라 형광등으로 흐르는 전류가 조절되어 형광등의 밝기가 조절되게 함과 아울러 광도전소자가 감지하는 주변의 조도에 따라 형광등의 밝기가 자동으로 조절되게 하는 자동 조광회로를 창안한 것으로 이를 첨부된 도면에 의하여 상세히 설명하면 다음과같다.In view of such a conventional defect, the present invention, as the user varies the variable resistance, the current flowing to the fluorescent lamp is controlled to adjust the brightness of the fluorescent lamp and the brightness of the fluorescent lamp according to the ambient light sensed by the photoconductive element Invented an auto-dimming circuit for automatically adjusting is described in detail by the accompanying drawings as follows.

제1도에 도시된 바와같이 교류전원(AC)이 인가되는 전원단자(A, B)가 트랜스(PT)의 일차코일(L1)에 접속되어 트랜스(PT)의 이차코일(L2)(L3)이 형광등(1)의 필라멘트(F1)(F2)에 접속됨과 아울러 전원단자(A)가 필라멘트(F2)의 일측단자에 접속되고, 전원단자(B)가 초크겸용 전류제한용 발진 트랜스인 초크코일(CH)의 일측단자에 접속되어 초크코일(CH)의 1/30지점인 중간단자에 접속되어 초크코일(CH)의 타측단자가 형광등(1)의 필라멘트(F1)의 일측단자에 접속된 형광등의 조광회로에 있어서, 전원단자(B)를 저항(R1)을 통한후 전원단자(A)와 함께 다이오드(D1-D4)로된 브리지 다이오드(2)의 입력단자에 접속하여 브리지 다이오드(2)의 출력단자를 저항(R2)을 통해 정전압 다이오드(ZD)의 캐소드에 접속함과 아울러 직렬로 접속된 저항(R3) 및 가변저항(VR)에 접속하고, 저항(R3) 및 가변저항(VR)의 접속점은 반전용 접적소자(IC1-IC4)를 통해 트랜지스터(TR)의 베이스에 접속하는 한편, 상기 브리지 다이오드(2)의 출력단자를 직렬로 접속된 콘덴서(C2) 광도전소자(CDS) 및 스위치(SW)와 콘덴서(C3)를 통해 트랜지스터(TR)의 베이스에 접속하고, 트랜지스터(TR)의 콜렉터 및 에미터는 전원단자(A) 및 초크코일(CH)의 중간단자에 접속하여 구성하였다.As shown in FIG. 1, the power terminals A and B to which the AC power source AC is applied are connected to the primary coil L 1 of the transformer PT so that the secondary coil L 2 of the transformer PT ( L 3 ) is connected to the filament F 1 (F 2 ) of the fluorescent lamp 1, the power supply terminal A is connected to one terminal of the filament F 2 , and the power supply terminal B is connected to the choke combined current limit. Filament (F 1 ) of fluorescent lamp (1) is connected to one terminal of choke coil (CH) for oscillation transformer In a dimming circuit of a fluorescent lamp connected to one side terminal of the power supply terminal (B) through the resistor (R 1 ) and then the power supply terminal (A) together with the diode (D 1 -D 4 ) of the bridge diode (2) Connect to the input terminal and connect the output terminal of the bridge diode 2 to the cathode of the constant voltage diode (ZD) through the resistor (R 2 ), and to the resistor (R 3 ) and the variable resistor (VR) connected in series. The connection point of the resistor R 3 and the variable resistor VR is connected to the base of the transistor TR through the inverting contact elements IC 1 -IC 4 , while the output terminal of the bridge diode 2 is connected. The capacitor C 2 connected in series is connected to the base of the transistor TR through the photoconductive element CDS and the switch SW and the capacitor C 3 , and the collector and emitter of the transistor TR are connected to a power supply terminal (C). A) and the choke coil (CH) were connected to the intermediate terminals.

이와같이 구성된 본 발명의 조광회로는 전원단자(A, B)에 100V의 교류전원(AC)이 인가되면, 그 교류전원(AC)은 트랜스(PT)의 일차코일(L1)에 인가되어 이차코일(L2, L3)로 유도되고, 이차코일(L2),(L3)로 유도된 전원은 형광등(1)의 양필라엔트(F1)(F2)에 인가되므로 필라멘트(F1)(F2)는 가열되어 열전자는 발생하고, 이때 필라멘트(F1)(F2)에 인가된 전원은 낮아 형광등(1)이 점등되지 않게 되고 전원단자(A)의 교류전원(AC)이 콘덴서(C1)를 통해 날카로운 펄스신호가 발생되어 초크코일(CH)의 중간단자에 인가되므로 초크코일(CH)은 0.1mA, 1500V정도의 전압을 주전류에 변조하여 필라메(F)1)(F2)에 인가하고, 형광등이 점등된다.In the dimming circuit of the present invention configured as described above, when 100 V AC power AC is applied to the power terminals A and B, the AC power AC is applied to the primary coil L 1 of the transformer PT and the secondary coil. is converted to the (L 2, L 3), the power induced in the secondary coil (L 2), (L 3 ) is therefore applied to both pillars ent (F 1) (F 2) of the fluorescent lamp 1, the filaments (F 1, (F 2 ) is heated and hot electrons are generated. At this time, the power applied to the filament (F 1 ) (F 2 ) is low so that the fluorescent lamp (1) does not light up and the AC power (AC) of the power supply terminal (A) Since a sharp pulse signal is generated through the condenser C 1 and applied to the middle terminal of the choke coil CH, the choke coil CH modulates a voltage of about 0.1 mA and 1500 V to the main current to form a pillar (F) 1 ). It is applied to (F 2 ) and the fluorescent lamp is turned on.

여기서, 콘덴서(C1)의 용량은 형광등(1)이 최저의 밝기로 점등되게 설정한다. 그리고 전원단자(A, B)의 교류전원(AC)이 저항(R1)을 통하고 브리지 다이오드(2)를 통해 브리지 정류괴어 맥류파로변환된후 저항(R2)을 통해 정전압 다이오드(ZD)에 인가되므로 브리지 다이오드(2)에서 출력된 맥류파의 일정전압 이상은 정전압 다이오드(ZD)에 의해 클리핑되고, 정전압 다이오드(ZD)의 제너전압이하 만이 저항(R3) 및 가변저항(VR)에 의해 분할되며, 분할된 전압은 집적소자(IC1, IC2)를 통해 구형파로 정형되고, 집적소자(IC3)(IC4)를 통해 트랜지스터(TR)의 베이스로 일정 바이어스 전류를 공급하게 되므로 트랜지스터(TR)의 콜렉터에서 에미터로 일정 전류가 흐르게 되고, 그 흐르는 전류는 콘덴서(C1)를 통한 전류와 합쳐서 초크코일(CH)을 통해 필라멘트(F1, F2)에 공급된다. 이때, 가변저항(VR)의 가변에 따라 트랜지스터(TR)의 베이스로 공급되는 전류가 가변되어 트랜지스터(TR)의 콜렉터에서 에미터로 흐르는 전류가 가변되고, 필라멘트(R1)(F2)로 흐르는 전류가 가변되므로 형광등(1)의 점등 밝기가 가변 즉, 가변저항(VR)을 조절하여 트랜지스터(TR)로 가장 많은 전류가 흐르게하면, 제2도의 (a)에 도시한바와같이 형광등(1)이 온, 오프되면서 매우 밝게 점등되고 가변저항(VR)을 조절하여 트랜지스터(TR)로 흐르는 전류를 조절함에 따라 제2도의(b)에 도시한 바와같이 형광등(1)이 온, 오프되어 밝기가 조절된다.Here, the capacitance of the capacitor C 1 is set so that the fluorescent lamp 1 is turned on at the lowest brightness. The AC power source AC of the power terminals A and B is converted into a pulse wave by rectifying the bridge rectifier through the resistor R 1 and the bridge diode 2 and then the constant voltage diode ZD through the resistor R 2 . Since it is applied to the constant voltage of the pulse wave output from the bridge diode (2) is clipped by the constant voltage diode (ZD), only below the Zener voltage of the constant voltage diode (ZD) to the resistor (R 3 ) and the variable resistor (VR). The divided voltage is squared through the integrated devices IC 1 and IC 2 , and a constant bias current is supplied to the base of the transistor TR through the integrated devices IC 3 and IC 4 . A constant current flows from the collector of the transistor TR to the emitter, which is combined with the current through the capacitor C 1 and supplied to the filaments F 1 and F 2 through the choke coil CH. At this time, the current supplied to the base of the transistor TR is variable according to the variable resistor VR so that the current flowing from the collector of the transistor TR to the emitter is variable, and the filament R 1 (F 2 ) is changed. Since the flowing current is variable, the lighting brightness of the fluorescent lamp 1 is variable, that is, when the variable resistor VR is adjusted to allow the most current to flow through the transistor TR, as shown in FIG. The lamp is turned on and off very brightly and the fluorescent lamp 1 is turned on and off as shown in (b) of FIG. 2 as the variable resistor VR is adjusted to control the current flowing to the transistor TR. Is adjusted.

그리고 스위치(SW)를 접속시키면, 광도전소자(CDS)가 감지하는 주변의 조도에 따라 형광등(1)의 밝기가 조절 즉, 광도전소자(CDS)는 광량에 반비례로 동작하여 주변이 매우 어두울 경우에는 저항값이 약 5MΩ이고, 주변의 조도가 21.5룩스(LUX)일 경우에는 약 9000Ω이며, 직사광 아래에서는 약50Ω 정도이며, 이와같이 광도전소자(DCS)가 감지하는 주변의 밝기에 따라 그의 저항값이 가변되면, 트랜지스터(TR)의 베이스로 흐르는 전류가 가변되므로 트랜지스터(TR)의 콜렉터에서 에미터로 흐르는 전류가 가변되어 광도전소자(CDS)가 감지하는 주변의 밝기에 따라 형광등(1)의 점등 밝기가 조절된다. 이때 광도전소자(CDS)에 직렬로 콘덴서(C2)를 접속하지 않으면, 난반사에 의하여 제3도의 (a)에 도시한바와같이 광도전소자(CDS)의 저항값 변화가 많아지나, 콘덴서(C2)를 직렬로 접속하면 제3도의 (b)에 도시한바와같이 저항값 변화가 완만하게 된다.When the switch SW is connected, the brightness of the fluorescent lamp 1 is adjusted according to the ambient light sensed by the photoconductor element CDS, that is, the photoconductor element is inversely proportional to the amount of light, so that the surroundings are very dark. In this case, the resistance value is about 5MΩ, and the ambient illuminance is about 9000Ω when the illumination is 21.5 lux (LUX), about 50Ω under the direct sunlight. If the value is variable, the current flowing to the base of the transistor TR is variable, so that the current flowing from the collector of the transistor TR to the emitter is variable, so that the fluorescent lamp 1 according to the ambient brightness sensed by the photoconductive element CDS is variable. The brightness of the light is adjusted. At this time, if the capacitor C 2 is not connected in series with the photoconductor element CDS, the reflection value of the photoconductor element CDS increases due to diffuse reflection as shown in FIG. When C 2 ) is connected in series, the resistance value changes smoothly as shown in FIG.

이상에서 상세히 설명한 바와같이 본 발명은 트랜지스터로 전류의 흐름을 제어하여 형광등의 밝기를 조절하므로 조광 동작이 매우 안정되고 또한 사용자가 가변저항을 조절하여 형광등의 밝기를 임의로 조절할수 있음을 물론 주변의 밝기에 따라 자동으로 밝기를 조절하여 불필요한 광도의 낭비와 함께 전력손실을 줄일 수 있는 효과가 있다.As described in detail above, the present invention controls the flow of current through a transistor to adjust the brightness of the fluorescent lamp, so that the dimming operation is very stable, and the user can arbitrarily adjust the brightness of the fluorescent lamp by adjusting the variable resistor, as well as the surrounding brightness. According to this, the brightness is automatically adjusted to reduce unnecessary power loss and power loss.

Claims (1)

전원단자(A, B)가 트랜스(PT)의 일차코일(L1)에 접속되어 이차코일(L2, L3)이 형광등(1)의 필라멘트(F1, F2)에 접속됨과 아울러 전원단자(A)가 콘덴서(C1)를 통해 초크코일(CH)의 일측단자에 접속되고, 전원단자(B)는 초크코일(CH)의 중간단자에 접속되어 초크코일(CH)의 타측단자가 필라멘트(F1)에 접속된 형광등의 점등회로에 있어서 전원단자(A, B)를 저항(R1), 브리지 다이오드(BD) 및 저항(R2)을 통해 정전압 다이오드(ZD)에 접속하여 그 접속점을 저항(R3), 가변저항(VR) 및 반전용 직접소자(IC1-IC4)를 통해 트랜지스터(TR)의 베이스에 접속하고 브리지 다이오드(2)의 출력단자를 콘덴서(C2), 광도전소자(CDS) 및 스위치(SW2)와, 콘덴서(C3)를 통해 트랜지스터(TR)의 베이스에 접속하며 트랜지스터(TR)의 콜렉터 및 에미터를 전원단자(A) 및 초크코일(CH)의 중간단자에 접속하여 구성함을 특징으로 하는 형광등의 자동 조광회로.The power terminals A and B are connected to the primary coil L 1 of the transformer PT, and the secondary coils L 2 and L 3 are connected to the filaments F 1 and F 2 of the fluorescent lamp 1 The terminal A is connected to one terminal of the choke coil CH through the condenser C 1 , and the power supply terminal B is connected to the middle terminal of the choke coil CH so that the other terminal of the choke coil CH is connected. In the lighting circuit of the fluorescent lamp connected to the filament F 1 , the power supply terminals A and B are connected to the constant voltage diode ZD through the resistor R 1 , the bridge diode BD, and the resistor R 2 . The connection point is connected to the base of the transistor TR via a resistor R 3 , a variable resistor VR and an inverting direct element IC 1- IC 4 , and the output terminal of the bridge diode 2 is condenser C 2 . And a photoconductive element (CDS) and a switch (SW 2 ) and a capacitor (C 3 ) are connected to the base of the transistor (TR) and the collector and emitter of the transistor (TR) are connected to the power supply terminal (A) and the choke coil ( Middle of CH) Automatic of the fluorescent lamp, it characterized in that the configuration contacts the chair dimming circuit.
KR1019850004605A 1985-06-25 1985-06-25 Automatic dimmer circuit of fluorescent lamp KR890000060B1 (en)

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Application Number Priority Date Filing Date Title
KR1019850004605A KR890000060B1 (en) 1985-06-25 1985-06-25 Automatic dimmer circuit of fluorescent lamp

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Application Number Priority Date Filing Date Title
KR1019850004605A KR890000060B1 (en) 1985-06-25 1985-06-25 Automatic dimmer circuit of fluorescent lamp

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KR870000844A KR870000844A (en) 1987-02-20
KR890000060B1 true KR890000060B1 (en) 1989-03-06

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