KR101164049B1 - The module of led dimming with cds sensor - Google Patents

The module of led dimming with cds sensor Download PDF

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KR101164049B1
KR101164049B1 KR1020100077758A KR20100077758A KR101164049B1 KR 101164049 B1 KR101164049 B1 KR 101164049B1 KR 1020100077758 A KR1020100077758 A KR 1020100077758A KR 20100077758 A KR20100077758 A KR 20100077758A KR 101164049 B1 KR101164049 B1 KR 101164049B1
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South Korea
Prior art keywords
sunset
output
sunrise
unit
traffic light
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KR1020100077758A
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Korean (ko)
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KR20120035238A (en
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김한권
석경수
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김한권
주식회사 필오나
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Priority to KR1020100077758A priority Critical patent/KR101164049B1/en
Publication of KR20120035238A publication Critical patent/KR20120035238A/en
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B47/00Circuit arrangements for operating light sources in general, i.e. where the type of the light source is not relevant
    • H05B47/10Controlling the light source
    • H05B47/105Controlling the light source in response to determined parameters
    • H05B47/11Controlling the light source in response to determined parameters by determining the brightness or colour temperature of ambient light
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/004Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/095Traffic lights
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B45/00Circuit arrangements for operating light emitting diodes [LED]
    • H05B45/30Driver circuits
    • H05B45/37Converter circuits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/02Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies
    • Y02B20/40Control techniques providing energy savings
    • Y02B20/42Control techniques providing energy savings based on timing means or schedule

Abstract

In the present invention, since the existing traffic light automatic control device for controlling the traffic light operation and the automatic illumination control through the microcomputer at the same time, a problem occurs that the microcomputer burns due to the system overload, the role of the illumination sensor only, Since it only serves as a sensor that detects only the ambient brightness level, the ambient light sensor alone is 20-30% lower than the standard brightness at sunset (especially at dawn) when there is no traffic between people or vehicles (= dawn). To solve the problem that automatic control is difficult to display brightness, EMI line filter unit, bridge rectifier unit, flyback PWM IC, MOSFET switching unit, output transformer unit, and rated DC voltage setting unit are configured so that sunset and especially people or vehicles can be performed without a microcomputer. 30% to 50% higher than the basic output power (10W, 340cd) depending on the measured resistance of the CDS sensor R1 and the sensing resistance R2. Dimming can be controlled so that the change in illuminance is reduced to 1% ~ 5% by outputting down 5W ~ 7W.This enables to save the output power of traffic lights at sunset and sunrise, and to save power. Its purpose is to provide LED dimming module for power-saving traffic lights at sunset and sunrise, which can save more than 90%.

Description

LED dimming module for power-saving traffic lights at sunset and sunrise {THE MODULE OF LED DIMMING WITH CDS SENSOR}

According to the present invention, after detecting the sunset and the outside light of the person or vehicle (= dawn), the outside of the light through the CDS sensor, the resistance value according to the detected light and the rating according to the first sensing resistance R2 value The DC voltage 10W set point is directly set to the rated DC voltage of the output transformer, and the power of the traffic light LED board is reduced from 30% to 50% to 5W to 7W at sunset and sunrise, resulting in a 1% to 5% change in illuminance. The present invention relates to a power saving LED dimming module for traffic lights at sunset and sunrise, which controls dimming so that there is almost no change in illumination.

Conventionally, based on the operation sequence of a general traffic signal controller, whether or not AC power (commonly referred to as 'AC') is output through the 'LSU' outputs a signal such as a mute signal light or the like. The signal lamp receiving the electric signal is an abbreviation of 'light emitting diode (LED') 'which is provided with a rectifying means for converting an incandescent lamp or an alternating current into a direct current (commonly referred to as a light emitting diode). Green lights, yellow lights, or red lights corresponding to the lights are turned on.

Such a conventional configuration method is output from the central control unit of the traffic signal controller or remote control from the traffic signal central control center in order to adjust the illumination corresponding to the brightness of the day and night in the traffic signal lamp mainly installed in the adoption of incandescent bulbs In accordance with the signal of the illuminance control amount commanded by communication (hereinafter referred to collectively as a traffic signal controller), AC power is controlled by phase control in the LSU circuit block to output power by controlling brightness more than necessary at night. Effect was provided.

However, in accordance with the trend of semiconductor industry technology and market changes, various traffic lights employing LED have been developed and installed due to the semi-permanent lifespan and the production and diffusion of LED, an environmentally friendly lighting means, but the traffic lights are irrelevant to the brightness of the surroundings. In particular, there is a concern that a temporary blindness to the traffic lights may cause a visual impairment to the driver, especially when the traffic lights are waiting for a long time at night.

In other words, during the day, the LED signal voltage (current) is set to relatively increase the brightness of the traffic lights. Thus, at night, the brightness of the traffic lights is excessively high, causing glare to hinder safety driving.

In order to solve this problem, the Korean Utility Model Utility Model Publication No. 20-0297496 generates a control signal that flashes a traffic light by receiving signals from the traffic signal controller and the traffic signal controller so as to properly control the traffic signal cycle. In the traffic signal device consisting of a micom, each of the FET to switch operation in accordance with the control signal of the microcomputer and selectively operate the red / blue / yellow LED traffic lights, and the crystal oscillator is oscillating operation according to the micom signal; Although there has been suggested a traffic light auto-dimming device consisting of an illumination sensor which detects the degree of ambient light and inputs illumination data to the microcomputer,

This is because the control of the traffic light operation control and the automatic illumination control through the microcomputer at the same time, due to the system overload, a problem occurs that the microcomputer burns, the microcommunication is a problem that the manufacturing cost of the traffic light rises above all.

And, since the role of the illuminance sensor only serves as a sensor that detects only the brightness of the surroundings, the illuminance sensor alone exhibits 20 to 30% lower luminance (by the National Police Agency's standard) at sunset and sunrise. There was a problem that automatic control is difficult.

Domestic Registration Utility Model Publication No. 20-0297496

In order to solve the above problems, in the present invention, 5W, which is down to 30% to 50% than the basic output power (10W) according to the resistance R1 and the sensing resistance R2 of the CDS sensor measured at sunset and sunrise without a microcomputer. By outputting ~ 7W, the dimming control can be done so that the change in illuminance does not change more than the original illuminance with 1% ~ 5%, which makes it possible to save the output power of traffic lights at sunset and sunrise, and to simplify the circuit configuration. Its purpose is to provide an LED dimming module for power-saving traffic lights at sunset and sunrise, which can reduce the product cost more efficiently.

To achieve the above object, the LED dimming module for power-saving traffic lights at sunset and sunrise according to the present invention is

Basic output according to CDS sensing resistance R1 and first sensing resistance R2 of the CDS sensor installed at the rear of the traffic light LED substrate 1 for displaying the traffic light and measured at sunset and sunrise. It is achieved by constructing a traffic light saving LED dimming module 100 that outputs power 10W to 5W to 7W down to 30% to 50% and dimming control to 1% to 5% than the basic illuminance (340cd).

As described above, in the present invention, 5W to 30% to 50% lower than the basic output power (10W) according to the values of the resistance R1 and the sensing resistance R2 of the CDS sensor measured at sunset and sunrise without a microcomputer. By outputting at 7W, dimming control can be done so that the change in illuminance does not change more than the original illuminance with 1% ~ 5%, and thus the output power of traffic lights can be reduced by 30% at sunset and sunrise, and the circuit configuration can be reduced. In simple terms, the product cost can be reduced by more than 90% compared to the existing one.

1 is a block diagram showing the components of the LED dimming module for power saving traffic lights at sunset, sunrise according to the present invention,
2 is a block diagram showing the components of a traffic light saving LED dimming module 100 according to the present invention;
3 is a circuit diagram showing the components of the traffic light saving LED dimming module 100 according to the present invention,
Figure 4 is a traffic light saving LED dimming module 100 according to the present invention is operated at sunrise, according to the measured value of the resistance R1 and the first sensing resistor R2 of the CDS sensor, 30 than the basic output power (10W) One embodiment illustrating a process of dimming control to output 5W ~ 7W down to% ~ 50%.

In the present invention, without the microcomputer, according to the value of the CDS sensing resistor R1 and the first sensing resistor R2 of the CDS sensor measured at sunset and sunrise, the basic output power (10W) to 30% ~ 50% to 5W ~ 7W It is characterized in that the LED light dimming module for energy saving traffic lights for dimming control by 1% to 5% than the basic illumination (340cd).

That is, after detecting external light at sunset and sunrise through the CDS sensor, the resistance value according to the detected light and the rated DC voltage setting value according to the first sensing resistor R2 are directly set to the rated DC voltage of the output transformer. The change in illuminance of LED board of traffic light is lowered to 1% ~ 5% than standard setting value (340cd: candel) so that the change of illuminance is almost unchanged compared with the original.

In this case, the change in the illumination intensity of the traffic light LED substrate is configured to be 1% to 5% lower than the reference set value (340cd: candel) because it is an illumination range in which the driver can safely drive because the user does not feel visual darkness.

The sunset described in the present invention is about to disappear over the western horizon as the sun has just passed, and in the present invention, the sunset time is set to 7:10 pm to 8:10 in the summer, and 5 pm in the winter. Set the hour from 6 o'clock to sunset.

In addition, in the present invention, the sunrise is set at sunrise time at 4:30 am to 5:30 in the case of summer, and from 6:30 am to 7:30 in the case of winter. Set to sunrise time.

In addition, the term dawn described in the present invention is interpreted in the same concept as sunrise.

In the LED substrate for a traffic light described in the present invention, 11 high brightness LEDs having a diameter of 30 W are formed in a circular body having a diameter of 30 cm 2, and a radial structure is formed in a total of 10 rows.

At this time, the light brightness of the traffic light LED substrate is 340 candels, the output voltage of the 144 high brightness LEDs is 22V, and the output power is output at 10W.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a configuration diagram showing the components of the LED dimming module for power saving light at sunset and sunrise according to the present invention, which is a light signal for the traffic light LED substrate (1) Installed at the rear and outputs the basic output power (10W) from 5W to 7W down from 30% to 50% according to the values of the CDS sensing resistance R1 and the first sensing resistance R2 of the CDS sensor measured at sunset and sunrise. The traffic light saving LED dimming module 100 is configured to dimming 1% ~ 5% than the basic illuminance (340cd).

Traffic dimming LED dimming module 100 according to the present invention, as shown in Figure 2, EMI line filter unit 110, bridge rectifier 120, flyback PWM IC 130, MOSFET switching unit 140 ), The output transformer 150, and the rated DC voltage setting unit 160.

First, the EMI line filter unit 110 according to the present invention will be described.

The EMI line filter unit 110 serves to remove noise of commercial AC power.

It consists of an EMC filter.

Next, the bridge rectifier 120 according to the present invention will be described.

The bridge rectifier 120 rectifies and directs the voltage output from the EMI line filter unit and supplies a voltage to the flyback PWM IC.

It is composed of a bridge diode.

Next, the flyback PWM IC 130 according to the present invention will be described.

The flyback PWM IC 130 receives the output voltage of the bridge rectifier and senses the ON period of the MOSFET switching unit which regulates the current flowing in the primary winding of the output transformer unit with the resistance R1 of the CDS sensor measured at sunset and sunrise. PWM (pulse width control) is controlled according to the rated DC voltage set value of the resistor R2, and the output power flowing from the secondary winding of the output transformer to the LED board for traffic lights is 30% to 50% of the basic output power (10W). It controls to output down 5W ~ 7W.

It consists of SG6858 devices from System General and has a 90V to 264V input voltage range.

The flyback PWM IC according to the present invention realizes ultra-low standby power and built-in synchronization slope compensation, so that the power supply can be more safely supplied to the LED substrate.

In the flyback PWM IC according to the present invention, as shown in FIG. 3, the output voltage of the bridge rectifier delivered to one side of the power supply terminal VDD is smoothed through the capacitor C VDD , rectified and input through the diode D VDD , and GATE. The MOSFET switching part is connected to one side of the output terminal, and the power supply ON period for controlling the current flowing through the primary winding of the output transformer part is sent to the MOSFET switching part as a PWM (pulse width control) control signal, and the photocoupler output side of the photocoupler is connected to one side of the FB feedback input terminal. This connection is configured to receive the rated DC voltage set point set according to the values of the resistor R1 and the sensing resistor R2 transmitted from the CDS sensor.

That is, the flyback PWM IC according to the present invention sends a PWM (pulse width control) control signal to the MOSFET switching unit according to the reference duty ratio through an internal PWM comparator, and receives the CDS sensor received as the FB feedback input terminal. After setting the rated DC voltage setting value according to the value of the resistor R1 and the sensing resistor R2 as the output voltage regulation signal, send the set output voltage regulation signal to the primary winding side of the output transformer section and step down the output transformer section to sunset. According to the values of the resistance R1 and the sensing resistance R2 of the CDS sensor measured at the time of sunrise, it is controlled to be output from 5W to 7W down from 30% to 50% than the basic output power (10W).

Next, the MOSFET switching unit 140 according to the present invention will be described.

The MOSFET switching unit 140 serves to switch the current flowing in the primary winding of the output transformer section according to the PWM control signal of the flyback PWM IC.

It consists of MOSFET Q1.

That is, as shown in FIG. 3, the gate terminal of the flyback PWM IC is connected to the gate terminal through the resistor RG, and the current sensing value flows through the R LF and C LF circuits through the first sensing resistor Rsense to the drain terminal. One side of the primary winding of the output transformer unit is connected to the source terminal.

MOSFET Q1 in which the PWM control signal of the flyback PWM IC flows into the gate terminal is turned on, and the current sensed value flowing into the drain terminal flows into the primary winding of the output transformer connected to the source terminal, and flows into the primary winding of the output transformer. Switch the flowing current.

Next, the output transformer 150 will be described.

The output transformer unit 150 outputs the input voltage transferred to the primary winding by the switching operation of the MOSFET switching unit according to the rated DC voltage set value of the resistor R1 and the sensing resistor R2 of the CDS sensor measured at sunset and sunrise. 10W) is reduced to 30W ~ 50% and outputs to 5W ~ 7W and outputs to traffic light LED board.

It consists of a primary winding connected to the MOSFET switching unit and a secondary winding connected to an LED substrate for a traffic light.

In addition, a bias sensing resistor R d is connected to one side of an output terminal (V 0 +, V 0 −) between the secondary winding and the LED substrate for a traffic light.

Stepping down to the output voltage means that the output transformer receives a commercial input power supply of 220V, and outputs it by stepping down to 22V, 48V, 60V, and 90V, which are driving powers of the high brightness LED.

Next, the rated DC voltage setting unit 160 according to the present invention will be described.

The rated DC voltage setting unit 160 is connected to one side of the output terminal (V 0 +, V 0- ) between the secondary winding of the output transformer and the LED substrate for traffic signal, and measured at sunset and sunrise of the CDS sensor. It sets the rated DC voltage setting value according to the value of the resistor R1 and the sensing resistor R2 and transfers it to the flyback PWM IC through the photocoupler, which is bias sensing resistor R d (161) and CDS sensing resistor R1 (162). And a second sensing resistor R2 163, a shunt regulator unit 164, and a photo coupler unit 165.

The bias sensing resistance R d (161) is connected to one side of the output terminal (V 0 +, V 0- ) between the secondary winding of the output transformer and the LED substrate for the traffic signal, and is rated at the secondary winding of the output transformer. The DC voltage is sensed and introduced into the light emitting part of the photocoupler to turn on the light emitting part of the photocoupler.

The CDS sensing resistor R1 162 serves to sense a resistance value according to light measured by the CDS sensor unit.

The CDS sensor detects external light at sunset and sunrise, and then transfers the resistance value according to the measured light to the CDS sensing resistor R1 using a photoconductive effect in which the resistance value decreases according to the detected light. That is, the CDS sensing resistor R1 receives a resistance value according to the light measured by the CDS sensor between the (+) terminal and the (-) terminal.

The CDS sensor according to the present invention is composed of GL5537.

Light resistance at 10Lux (at 25 ℃) is 18 ~ 50KΩ, Dark Resistance at 0 Lux is 2.0MΩ (min), Power Dissipation (at 25 ℃) is 100mW The maximum voltage (Max Voltage (at 25 ℃)) is 150V, the ambient temperature range (Ambient Temperature Range) is configured to be -30 ~ +70 ℃.

After detecting the external light at sunset and sunrise, the resistance value decreases according to the detected light, so that when the detected light (= illuminance) is 10 Lux, the resistance value is set to 18 to 50 KΩ.

In other words, set the resistance value to decrease by 18 ~ 50KΩ for each 10Lux.

In the present invention, after detecting the external light at sunset and sunrise, the resistance value of the CDS sensor which decreases according to the detected light is set as shown in Table 1 below.

Light detected at sunset and sunrise (= illuminance) Resistance value of CDS sensor delivered to CDS sensor R1 10Lux 50 KΩ 20Lux 100 KΩ 30Lux 200 KΩ 40Lux 300 KΩ 50Lux 400 KΩ 60Lux 500 KΩ 80Lux 600 KΩ

The second sensing resistor R2 163 senses an output current output through the CDS sensing resistor R1 and transmits the output current to the shunt regulator.

The shunt regulator 164 serves to force the rated DC voltage set value set according to the values of the resistor R1 and the sensing resistor R2 transmitted from the CDS sensor to the light emitting unit of the photocoupler.

It consists of TL431.

The photocoupler 165 emits light by attaching an LED to one side and the other side receives light through a photodiode or phototransistor, and transmits and receives information on the rated DC voltage set value, and then, the rated DC voltage set value It feeds the feedback FB terminal of the flyback PWM IC.

It consists of PC 817, and consists of a light emitting part and a light receiving part.

The feedback FB terminal of the flyback PWM IC is connected to one output side of the light receiver of the photocoupler.

As such, when the rated DC voltage setting unit according to the present invention forcibly sets the rated DC voltage setting value set according to the values of the resistor R1 and the sensing resistor R2 transmitted from the CDS sensor through the shunt regulator TL431 to be delivered to the light emitting unit of the photocoupler, It receives the rated DC voltage setting from the light receiver of the coupler and transfers it to the FB terminal of the flyback PWM IC.

Hereinafter, a detailed operation process of the LED dimming module for power saving light at sunset and sunrise according to the present invention will be described.

First, the noise of the commercial AC power source is removed through the EMI line filter unit.

Subsequently, after rectifying and directing the voltage output from the EMI line filter through the bridge rectifying unit, the voltage is supplied to the flyback PWM IC.

Subsequently, the flyback PWM IC receives the output voltage of the bridge rectifying part and turns it on by sending a PWM control signal to a MOSFET switching part which interrupts a current flowing in the primary winding of the output transformer part.

Subsequently, the MOSFET switching unit switches the current flowing in the primary winding of the output transformer section in accordance with the PWM control signal of the flyback PWM IC.

Subsequently, the input voltage delivered to the primary winding by the switching operation of the MOSFET switching unit in the output transformer unit is stepped down and output to the traffic light LED substrate.

Subsequently, the flyback PWM IC connected to one side of the output terminal (V 0 +, V 0- ) between the secondary winding of the output transformer and the LED substrate for the traffic signal (V 0 +, V 0- ) is measured at sunrise, and the resistance R 1 and the sensing resistance R 2 of the CDS sensor are measured. The rated DC voltage setpoint is set according to the value and transferred to the flyback PWM IC through the photocoupler.

Subsequently, the ON period of the MOSFET switching unit which intercepts the current flowing in the primary winding of the output transformer unit in the flyback PWM IC is set according to the rated DC voltage setting value of the resistor R1 and the sensing resistor R2 of the CDS sensor measured at sunset and sunrise. Pulse width control), so that the output power flowing from the secondary winding of the output transformer portion to the LED substrate for traffic light is output to 5W to 7W, which is 30% to 50% lower than the basic output power (10W).

Subsequently, the input voltage transferred from the output transformer section to the primary winding by the switching operation of the MOSFET switching section is set to the basic output power (10 W) according to the rated DC voltage setting values of the resistor R1 and the sensing resistor R2 of the CDS sensor measured at sunset and sunrise. It outputs to traffic light LED board by stepping down to output 7W down to 30%.

As such, the traffic light saving LED dimming module according to the present invention is formed on the rear of the traffic light LED substrate 1, so that at sunset (especially at sunrise or without traffic), the traffic light LED substrate Power can be output from 5W to 7W down from 30% to 50%.

Even if the power of the traffic light LED board is reduced to 30% to 50%, the brightness of the traffic light LED board becomes 1% to 5% of the illuminance. The driver can drive safely.

100: LED dimming module for power saving lamp 110: EMI line filter unit
120: bridge rectifier 130: flyback PWM IC
140: MOSFET switching unit 150: output transformer
160: rated DC voltage setting unit

Claims (5)

  1. Basic output according to CDS sensing resistance R1 and first sensing resistance R2 of the CDS sensor installed at the rear of the traffic light LED substrate 1 for displaying the traffic light and measured at sunset and sunrise. EMI line filter unit 110, bridge rectifier 120, and flyback to output power (10W) from 5% to 7W down from 30% to 50% and dimming control from 1% to 5% of basic illuminance (340cd). PWM IC 130, MOSFET switching unit 140, output transformer 150, bias sensing resistor R d 161, CDS sensing resistor R1 162, second sensing resistor R2 163, shunt regulator In the sunset and sunrise traffic light saving LED dimming module comprising a traffic light saving LED dimming module 100 including a rated DC voltage setting unit 160 consisting of a unit 164, a photocoupler unit 165 in the ,
    The output transformer unit 150 has a primary winding connected to the MOSFET switching unit, a secondary winding connected to a traffic light LED substrate, and an output terminal (V 0 +,) between the secondary winding and the traffic light LED substrate. V 0- ) The bias sensing resistor R d is connected to one side, so that the input voltage transferred to the primary winding by the switching operation of the MOSFET switching unit is measured at sunset and sunrise, and the rated DC voltage of the resistor R1 and the sensing resistor R2 of the CDS sensor. According to the setting value, it is outputted to the traffic light LED board by stepping down the output to 5W ~ 7W, which is down to 30% ~ 50% from the basic output power (10W).
    The rated DC voltage setting unit 160 has a bias sensing resistor R d 161 connected to one side of an output terminal (V 0 +, V 0- ) between the secondary winding of the output transformer and the LED substrate for a traffic light. The LED dimming module for power-saving traffic lights at sunset and sunrise, characterized in that it is configured to sense the rated DC voltage output from the secondary winding of the transformer to flow into the light emitting portion of the photocoupler to turn on the light emitting portion of the photocoupler.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101286268B1 (en) 2012-08-30 2013-07-15 이은주 Led signal lamp having led drive box

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101378525B1 (en) * 2012-05-24 2014-03-27 김포대학교산학협력단 Led lighting apparatus
KR101308961B1 (en) * 2013-05-14 2013-09-27 주식회사 필오나 The apparatus of led lamp dimming with dimming program module
KR101372252B1 (en) * 2013-09-02 2014-03-10 주식회사 싸인텔레콤 The apparatus of led lamp

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010057331A (en) * 2008-08-29 2010-03-11 Sharp Corp Power supply device and lighting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010057331A (en) * 2008-08-29 2010-03-11 Sharp Corp Power supply device and lighting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101286268B1 (en) 2012-08-30 2013-07-15 이은주 Led signal lamp having led drive box

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