KR0156462B1 - Control device of a train lamp - Google Patents

Control device of a train lamp Download PDF

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Publication number
KR0156462B1
KR0156462B1 KR1019950051520A KR19950051520A KR0156462B1 KR 0156462 B1 KR0156462 B1 KR 0156462B1 KR 1019950051520 A KR1019950051520 A KR 1019950051520A KR 19950051520 A KR19950051520 A KR 19950051520A KR 0156462 B1 KR0156462 B1 KR 0156462B1
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KR
South Korea
Prior art keywords
speed
voltage
vehicle
taillight
brightness
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KR1019950051520A
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Korean (ko)
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KR970037339A (en
Inventor
김은식
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김태구
대우자동차주식회사
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Priority to KR1019950051520A priority Critical patent/KR0156462B1/en
Publication of KR970037339A publication Critical patent/KR970037339A/en
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Publication of KR0156462B1 publication Critical patent/KR0156462B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/44—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
    • B60Q1/444—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal with indication of the braking strength or speed changes, e.g. by changing shape or intensity of the indication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/0088—Details of electrical connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/30—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating rear of vehicle, e.g. by means of reflecting surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/44—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
    • B60Q1/441—Electric switches operable by the driver's pedals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/303—Speed sensors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

본 발명은 자동차의 조명 장치에 관한 것으로, 특히 자동차의 안전등인 미등 작동시 자동차의 속도를 감지하여 감속의 정도에 따라 미등의 밝기를 자동으로 제어함으로써, 자동차의 급감속시 발생할 수 있는 안전사고를 방지할 수 있도록, 속도센서를 이용하여 자동차의 속도 변화를 감지하는 속도 검출부와, 상기 속도 검출부에서 감지된 감속의 정도에 따라 미등의 밝기를 제어하는 출력 제어부로 구성한 자동차의 속도에 따른 미등 밝기 제어 장치에 관한 것이다.The present invention relates to a lighting device of a vehicle, and in particular, by detecting the speed of the vehicle during the operation of the taillight, the safety light of the vehicle automatically controls the brightness of the taillight according to the degree of deceleration, safety accidents that may occur during rapid deceleration of the vehicle In order to prevent, the speed of the taillight brightness control according to the speed of the vehicle consisting of a speed detector for detecting a speed change of the vehicle using a speed sensor and an output control unit for controlling the brightness of the taillight according to the degree of deceleration detected by the speed detector Relates to a device.

Description

자동차의 속도에 따른 미등 밝기 제어 장치Taillight brightness control device according to the speed of the car

제1도는 일반적인 미등 구동 회로도.1 is a general taillight driving circuit diagram.

제2도는 본 발명에 따른 자동차의 속도에 따른 미등 밝기 제어 장치 구성 회로도.2 is a circuit diagram of a taillight brightness control device according to the speed of the vehicle according to the invention.

제3도는 제2도에 대한 각부 동작 파형도이다.FIG. 3 is a waveform diagram of parts operating with respect to FIG. 2.

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

10 : 속도 검출부 20 : 출력 제어부10: speed detection unit 20: output control unit

SR1 : 속도 센서 IC1 : 주파수/전압 변환기SR1: Speed Sensor IC1: Frequency / Voltage Converter

IC2 : 시간 지연기 IC3 : 차동 증폭기IC2: time delay IC3: differential amplifier

IC4 : 비교기 SW1 : 램프 스위치IC4: Comparator SW1: Lamp Switch

SW2 : 브레이크페달 스위치 RY1 : 전조등 릴레이SW2: Brake pedal switch RY1: Headlight relay

RY2 : 미등 릴레이 HL : 전조등RY2: Taillight relay HL: Headlight

TL : 미등 BL : 제동등TL: Taillight BL: Braking Light

Q1, Q2 : 트랜지스터 R1-R5 : 저항Q1, Q2: transistors R1-R5: resistors

본 발명은 자동차의 조명 장치에 관한 것으로, 특히 자동차의 안전등인 미등 작동시 자동차의 속도를 감지하여 감속의 정도에 따라 미등의 밝기를 자동으로 제어함으로써, 자동차의 급감속시 발생할 수 있는 안전사고를 방지할 수 있도록한 자동차의 속도에 따른 미등 밝기 제어 장치에 관한 것이다.The present invention relates to a lighting device of a vehicle, and in particular, by detecting the speed of the vehicle during the operation of the taillight, the safety light of the vehicle automatically controls the brightness of the taillight according to the degree of deceleration, safety accidents that may occur during rapid deceleration of the vehicle It relates to a taillight brightness control device according to the speed of the vehicle to be prevented.

일반적으로 자동차는 일정한 규칙에 따라 운행하게 되므로 자동차나 보행자에 대하여 주행중 자기 의사를 밝기는 것으로 방향지시등, 제동등, 후진등 외에 후미등, 차폭등, 번호판등 비상점멸 신호등이 있으며, 이들은 안전기준에 의하여 설치하여야 하고 작동과 성능도 기준에 적합하여야 한다.In general, the car operates according to certain rules, so it is to illuminate one's intentions while driving a car or a pedestrian, and there are emergency blinking lights such as tail lights, car lights, license plates, etc. Operation and performance shall also comply with the standards.

상기 안전등의 하나인 미등(Tail Lamp)은 야간에 주행하거나 정지하고 있을 때 자동차가 있는 것을 뒤차에 알리는 표시등으로, 미등으로만 사용하는 단독식과 제동등과 겸용으로 사용하는 겸용식이 있으며, 렌즈는 적색으로 안전기준에 규정되어 있다.One of the safety lamps (Tail Lamp) is a light indicating the vehicle behind the car when driving or stopping at night, there is a single type used only as a taillight and a combined use of a brake light, the lens is red It is specified in the safety standard.

또한, 제동등(Stop Lamp)은 브레이크 페달을 밝았을 때 뒤차에 제동함을 알리는 램프인데 제동장치의 작동에 따라 점등되며 안전기준으로 정하여지고 있고, 미등처럼 단독식과 겸용식이 있으며 렌즈는 적색이고, 전구는 15-30W 정도를 많이 사용하며 미등과 겸용식인 경우에는 중심 광도가 미등의 2배 이상이어야 한다.In addition, the stop lamp is a lamp for braking to the rear of the vehicle when the brake pedal is turned on. The lamp is turned on according to the operation of the braking system, and it is set as a safety standard. It uses a lot of 15-30W. In case of combined use with tail light, the center brightness should be more than twice that of tail light.

종래의 미등 회로는 제1도에 도시된 바와 같이, 램프 스위치(SW1)의 스위칭 동작에 의해 미등 접속단자(T)를 접속시키면 상기 램프 스위치(SW1)의 미등 접속단자(T)를 통해 입력된 밧데리 전원(B+)이 미등 릴레이(RY2)를 구동시킴으로써 미등(TL)을 점등시키도록 구성되어 있다.The conventional taillight circuit is input through the taillight connection terminal T of the lamp switch SW1 when the taillight connection terminal T is connected by the switching operation of the lamp switch SW1 as shown in FIG. The battery power supply B + is configured to turn on the tail light TL by driving the tail light relay RY2.

그러나, 이와 같은 종래의 미등 회로는 미등의 밝기가 고정되어 있으므로 야간 주행시 자동차의 속도를 줄여야 하는 경우 감속의 정도를 뒤차의 운전자가 인지할 수 없으며, 앞차의 감속 정도를 인지할 수 없어 급브레이크를 밟아야하는 경우가 발생하게 되는 문제점이 있고, 이로 인하여 안전 사고가 발생하게 되는 문제점이 있으며, 따라서 자동차 운행의 효율성이 저하되는 문제점이 있었다.However, in the conventional taillight circuit, the brightness of the taillight is fixed, so when the driver needs to reduce the speed of the car at night, the driver of the next car cannot recognize the deceleration, and the driver cannot recognize the deceleration of the front car. There is a problem that occurs if you must step on, there is a problem that a safety accident occurs, and thus there was a problem that the efficiency of driving the car is lowered.

이에 본 발명은 상기한 바와 같은 종래의 제 문제점을 해소시키기 위하여 창안된 것으로, 자동차의 안전등인 미등 작동시 자동차의 속도를 감지하여 감속의 정도에 따라 미등의 밝기를 자동으로 제어함으로써, 자동차의 급감속시 발생할 수 있는 안전사고를 방지할 수 있도록 한 자동차의 속도에 따른 미등 밝기 제어 장치를 제공하는데 그 목적이 있다.Accordingly, the present invention was devised to solve the above-mentioned problems of the prior art, by detecting the speed of the vehicle during the operation of the taillight, which is the safety light of the vehicle, and automatically controlling the brightness of the taillight according to the degree of deceleration, thereby rapidly reducing the vehicle. The purpose of the present invention is to provide a taillight brightness control device according to the speed of a vehicle so as to prevent safety accidents that may occur immediately.

상기한 바와 같은 목적을 달성하기 위한 본 발명은, 속도 센서를 이용하여 자동차의 속도 변화를 감지하는 속도 검출부와, 상기 속도 검출부에서 감지된 감속의 정도에 따라 미등의 밝기를 제어하는 출력 제어부로 구성함을 특징으로 한다.The present invention for achieving the above object is composed of a speed detector for detecting a speed change of the vehicle using a speed sensor, and an output control unit for controlling the brightness of the taillight according to the degree of deceleration detected by the speed detector It is characterized by.

이하 본 발명을 첨부한 예시도면을 참조하여 자세히 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

본 발명 자동차의 속도에 따른 미등 밝기 제어 장치는 제2도에 도시한 바와 같이, 속도 센서를 이용하여 자동차의 속도 변화를 감지하는 속도 검출부(10)와; 상기 속도 검출부(10)에서 감지된 감속의 정도에 따라 미등의 밝기를 제어하는 출력 제어부(20)로 구성된다.In accordance with an embodiment of the present invention, a taillight brightness control apparatus according to a speed of a vehicle includes: a speed detector 10 detecting a speed change of a vehicle using a speed sensor; It is composed of an output control unit 20 for controlling the brightness of the taillight according to the degree of deceleration detected by the speed detector (10).

상기 속도 검출부(10)는 자동차의 속도를 감지하는 속도 센서(SR1)와; 상기 속도 센서(SR1)로 부터 감지된 차량의 속도 주파수 신호를 전압으로 변환하는 주파수/전압 변환기(IC1); 상기 주파수/전압 변환기(IC1)를 통해 변환된 전압 신호를 소정시간 지연시키는 시간 지연기(IC2) 및; 상기 주파수/전압 변화기(IC1)로 부터 입력된 전압 및 상기 시간 지연기(IC2)로 부터 입력된 전압을 차동 증폭하여 감속의 정도를 측정하는 차동 증폭기(IC3)를 포함하여 구성된다.The speed detector 10 includes a speed sensor SR1 for detecting a speed of a vehicle; A frequency / voltage converter (IC1) for converting a speed frequency signal of the vehicle detected by the speed sensor SR1 into a voltage; A time delay (IC2) for delaying the voltage signal converted by the frequency / voltage converter (IC1) for a predetermined time; And a differential amplifier IC3 for differentially amplifying the voltage input from the frequency / voltage changer IC1 and the voltage input from the time delay IC2 to measure the degree of deceleration.

상기 출력 제어부(20)는 다이오드(D1)를 통해 상기 속도 검출부(10)로 부터 출력된 전압을 RC 시정수에 의해 일정 전압으로 유지시키기 위한 저항(R1-R3) 및 콘덴서(C1); RC 시정수에 의해 일정 전압으로 유지시킨 전압을 삼각파 발생단으로 부터 발생된 삼각파와 비교 출력하는 비교기(IC4) 및; 상기 비교기(IC4)로 부터 비교 출력된 신호에 의해 미등(TL)의 밝기를 제어하는 트랜지스터(Q1, Q2)를 포함하여 구성된다.The output control unit 20 includes a resistor (R1-R3) and a capacitor (C1) for maintaining the voltage output from the speed detection unit 10 through a diode (D1) to a constant voltage by RC time constant; A comparator (IC4) for comparing and outputting the voltage maintained at a constant voltage by the RC time constant with the triangle wave generated from the triangle wave generator; And transistors Q1 and Q2 for controlling the brightness of the taillight TL by the signal output from the comparator IC4.

이와 같이 구성된 본 발명의 작용 및 효과를 제3도를 참조하여 상세히 설명하면 다음과 같다.When described in detail with reference to Figure 3 the operation and effect of the present invention configured as described above.

운전자가 자동차를 운행하기 위하여 자동차의 시동을 걸고 주행을 하면, 속도 검출부(10)의 속도 센서(SR1)가 자동차의 속도를 감지하여 주파수/전압 변환기(IC1)로 입력됨으로써, 상기 주파수/전압 변화기(IC1)로 입력된 주파수 신호는 전압(VS1)로 변환되어 차동 증폭기(IC3)의 반전 단자(-)로 입력시킴과 아울러 시간 지연기(IC2)를 통해 소정시간 지연된 전압(VS2)을 상기 차동 증폭기(IC3)의 비반전 단자(+)로 입력시킨다.When the driver starts the vehicle to drive the vehicle and drives the vehicle, the speed sensor SR1 of the speed detector 10 detects the speed of the vehicle and inputs the frequency / voltage converter IC1 to the frequency / voltage changer. The frequency signal inputted to IC1 is converted to voltage VS1 and input to the inverting terminal (-) of the differential amplifier IC3, and the voltage delayed by a predetermined time through the time delay IC2 is differentially applied. Input to non-inverting terminal (+) of amplifier IC3.

상기 차동 증폭기(IC3)는 자동차의 감속 정도를 측정하기 위하여 입력된 두 전압의 차(VS2-VS1)에 비례하는 제3도의 (a)와 같은 감속도 전압(Vd)을 출력시킨다.The differential amplifier IC3 outputs a deceleration voltage Vd such as (a) of FIG. 3 which is proportional to the difference between two input voltages V S2 -V S1 to measure the degree of deceleration of the vehicle.

상기와 같이 속도 검출부(10)로 부터 출력된 감속도 전압(Vd)은 출력 제어부(20)의 역전압 다이오드(D1)를 통해 저항(R1) 및 콘덴서(C1)의 RC 시정수에 의해 제3도의 (b)와 같이 일정 시간으로 유지된 전압(V+)을 비교기(IC4)의 비반전 단자(+)로 입력시킨 후, 삼각파 발생단으로 부터 발생되어 상기 비교기(IC4)의 반전 단자(-)로 입력된 제3도의 (b)와 같은 삼각파(V-)와 비교하여 제3도의 (c)와 같은 제어 신호(Vo)를 출력시킨다.As described above, the deceleration voltage Vd output from the speed detection unit 10 is controlled by the RC time constant of the resistor R1 and the capacitor C1 through the reverse voltage diode D1 of the output control unit 20. As shown in (b) of FIG. 2, the voltage V + maintained for a predetermined time is input to the non-inverting terminal (+) of the comparator IC4, and is then generated from the triangular wave generating terminal to generate the inverting terminal (-) of the comparator IC4. The control signal Vo as shown in (c) of FIG. 3 is output as compared with the triangular wave V- as shown in (b) of FIG.

이때, 상기 비교기(IC4)의 비반전단자(+)로 입력시킨 전압(V+)은 저항(R1) 및 콘덴서(C1)의 RC 시정수에 의해 일정시간 동안 유지되는데, 상기 전압(Vd)이 일정 전압보다 낮을 경우 다음 식(식 1)에 의해 일정 전압을 유지하게 된다.At this time, the voltage V + input to the non-inverting terminal (+) of the comparator IC4 is maintained for a predetermined time by the RC time constant of the resistor R1 and the capacitor C1, and the voltage Vd is constant. If it is lower than the voltage, the constant voltage is maintained by the following equation (Equation 1).

상기 비교기(IC4)의 출력 신호(Vo)에 따라 트랜지스터(Q1, Q2)의 턴-온 시간이 증가됨으로써 미등(TL)의 밝기가 증가하게 된다.As the turn-on time of the transistors Q1 and Q2 is increased according to the output signal Vo of the comparator IC4, the brightness of the taillight TL is increased.

여기서, 브레이크의 페달을 밝은 경우 브레이크페달 스위치(SW2)가 턴-온되어 제동등(BL)의 발기도 증가하게 된다.Here, when the pedal of the brake is bright, the brake pedal switch SW2 is turned on to increase the erection of the brake light BL.

한편, 상기와 같이 자동차의 속도가 감속된 상태에서 감속이 멈추어도 저항(R1) 및 콘덴서(C1)의 RC 시정수에 의해 일정 시간 동안 미등(TL) 및 제동등(BL)의 밝기를 증가된 상태로 유지해줌으로써 뒤차 운전자의 식별도를 높일 수 있게 한다.On the other hand, as described above, even if the deceleration stops in the state in which the speed of the vehicle is reduced, the brightness of the tail light TL and the brake light BL is increased for a predetermined time by the RC time constant of the resistor R1 and the condenser C1. By keeping it at, the driver of the next car can be more easily identified.

이상에서 상세히 설명한 바와 같이 본 발명은, 자동차의 안전등인 미등 작동시 자동차의 속도를 감지하여 감속의 정도에 따라 미등의 밝기를 자동으로 제어함으로써 자동차의 급감속시 발생할 수 있는 안전 사고를 방지할 수 있으며, 안전 사고를 방지함으로써 교통 혼잡을 방지할 수 있고, 따라서 차량 운행의 효율성을 극대화할 수 있는 효과가 있다.As described in detail above, the present invention, by detecting the speed of the vehicle during the operation of the taillight, the safety light of the vehicle can automatically control the brightness of the taillight according to the degree of deceleration to prevent a safety accident that may occur during rapid deceleration of the vehicle. In addition, it is possible to prevent traffic congestion by preventing a safety accident, thus maximizing the efficiency of vehicle operation.

Claims (3)

자동차의 시동을 걸고 주행하면 자동차의 속도변화를 감지하여 전기적인 신호로 변환하는 속도센서(SR1)를 포함하여 전기적으로 이루어진 속도검출부(10)와; 그리고 상기 속도검출부(10)와 전기적으로 연결되어 있으며, 이 속도검출부(10)로 부터 인가되는 전기적인 신호에 따라 미등의 밝기를 제어하는 출력 제어부(20)로 구성되는 것을 특징으로 하는 자동차의 속도에 따른 미등 밝기 제어장치.A speed detection unit 10 electrically configured to include a speed sensor SR1 that detects a speed change of the car and converts the speed into an electrical signal when the vehicle starts to run; And an output control unit 20 electrically connected to the speed detection unit 10 and configured to control the brightness of the taillight according to an electrical signal applied from the speed detection unit 10. Taillight brightness control according to. 제1항에 있어서, 상기 속도검출부(10) 속도 센서(SR1)로 부터 감지된 차량의 속도 주파수 신호를 전압으로 변환하는 주파수/전압 변환기(IC1); 상기 주파수/전압 변환기(IC1)를 통해 변환된 전압 신호를 소정시간 동안 지연시키는 시간지연기(IC2); 상기 시간지연기(IC2)와 상기 주파수/전압 변화기(IC1)로부터 입력된 전압을 차동증폭하여 감속의 정도를 측정하는 차동증폭기(IC3)를 포함하여구성한 것을 특징으로 하는 자동차의 속도에 따른 미등 밝기 제어장치.2. The apparatus of claim 1, further comprising: a frequency / voltage converter (IC1) for converting a speed frequency signal of the vehicle sensed by the speed detector (10) to a speed sensor (SR1) into a voltage; A time delay unit IC2 for delaying the voltage signal converted by the frequency / voltage converter IC1 for a predetermined time; Taillight brightness according to the speed of the vehicle, characterized in that it comprises a differential amplifier (IC3) for measuring the degree of deceleration by differentially amplifying the voltage input from the time delay (IC2) and the frequency / voltage changer (IC1) Control unit. 제1항에 있어서, 상기 출력제어부(20)는 다이오드(D1)를 통해 상기 속도 검출부(10)로부터 출력된 전압을 RC 시정수에 의해 일정 전압으로 유지시키기 위한 저항(R1~R3) 및 콘텐서(C1); 상기 저항(R1~R3) 및 콘덴서(C1)에 의해 유지된 RC 시정수에 의해 일정 전압으로 유지시킨 전압을 삼각파 발생단으로 부터 발생된 삼각파와 비교 출력하는 비교기(IC4); 상기 비교기(IC4)로 부터 비교 출력된 신호에 의해 미등(TL)의 밝기를 제어하는 트랜지스터(Q1, Q2)를 포함하여 구성한 것을 특징으로 하는 자동차의 속도에 따른 미등 밝기 제어장치.According to claim 1, wherein the output control unit 20 is a resistor (R1 ~ R3) and capacitor for maintaining the voltage output from the speed detector 10 through the diode (D1) to a constant voltage by RC time constant (C1); A comparator (IC4) for comparing and outputting the voltage maintained at a constant voltage by the RC time constant held by the resistors R1 to R3 and the capacitor C1 with the triangular wave generated from the triangular wave generator; Taillight brightness control device according to the speed of the vehicle, characterized in that it comprises a transistor (Q1, Q2) for controlling the brightness of the taillight (TL) by the signal output from the comparator (IC4).
KR1019950051520A 1995-12-19 1995-12-19 Control device of a train lamp KR0156462B1 (en)

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KR0156462B1 true KR0156462B1 (en) 1998-10-15

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