KR101998826B1 - LED Street Apparatus of Dimming Control - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power saving dimming LED streetlight device, and more particularly, to an automatic dimming / dimming control of a LED light emitting module according to the ambient brightness using a peripheral light measuring circuit under the control and control of a streetlight controller, (LED) streetlight device improved to realize a nighttime dimming function using a circuit from a controller microcontroller circuit.
The present invention provides a streetlight control unit 10 in which an AC 220 V power source is input through an AC power input terminal and an ambient light measuring circuit 15 receives an ambient light of a corresponding streetlight as an illuminance sensor; Receives the LED SMPS AC power input received from the streetlight control unit 10 and converts it into a DC power suitable for driving the LED light emitting module 30 and supplies it to the LED light emitting module 30 The LED SMPS power supply unit 20 performs the function of outputting the power to the LED SMPS 20. DC power source and emits illumination light in a visible light region through a plurality of arrayed LED lights. The LED light emitting module 30 is a commercial LED module that can determine the intensity of the illumination light output according to the voltage and current amount of an input DC power source ).

Description

LED Street Apparatus of Dimming Control "

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power saving dimming LED streetlight device, and more particularly, to an automatic dimming / dimming control of a LED light emitting module according to the ambient brightness using a peripheral light measuring circuit under the control and control of a streetlight controller, (LED) streetlight device improved to realize a nighttime dimming function using a circuit from a controller microcontroller circuit.

In general, a light emitting diode (LED) is a kind of diode that emits light when a current flows through it, and is manufactured using a semiconductor manufacturing process. Such an LED (light emitting diode) is highly reliable and easy to modulate And the operation is stable.

As a result, the efficiency of the LED is greatly improved, and it has a longer lifetime and less energy consumption, as well as being economical and environmentally friendly, as compared with conventional lighting devices such as fluorescent lamps and incandescent lamps. Accordingly, an LED lighting device employing LEDs has been replaced with a conventional lighting device such as a fluorescent lamp, an incandescent lamp, and the like, and has been attracting attention as a power saving type lighting device.

The streetlight lighting system has been used for a mercury discharge tube bulb or a sodium discharge bulb bulb. However, due to the development of LED lighting technology, demand for replacing a streetlight, a security tunnel, etc. with an LED system is increasing worldwide.

In the conventional streetlight lighting apparatus, it is general to remotely control the streetlight by day and night, but it has a problem that it takes a lot of cost to construct the streetlight remote control system.

 On the other hand, as a related art related to a luminaire are disclosed a registration utility model 20-0385296 (May 27, 2005) and a registration patent publication 10-0154652 (December 15, 1998).

In the conventional technology such as the Registration Practical Utility Model (20-0385296), the illumination is controlled automatically by using the brightness of the surroundings and the sunrise sunset time, and the function of calibrating the luminaire is lacking.

In addition, in the conventional technology such as the patent publication (JP 10-0154652), only a dimming function considering the reduction of the luminous flux of the luminaire, the dirt of the wall and the like is provided, but the luminaire does not have the function of the luminaire. In addition, when the luminaire is turned on / off, the light amount is not controlled, and a glare phenomenon occurs due to a sudden change in the amount of light.

However, the LED streetlight device has an excellent energy saving effect by itself compared with the conventional mercury discharge tube lamp or the sodium discharge lamp. However, in the nighttime when the vehicle or the pedestrian passes the road, There is also a feature that can achieve a larger power saving effect.

The dimming function in the lighting device is a technology for automatically controlling the brightness of the LED lighting according to the situation. In the past, a separate device was installed in the street lamp to control the nighttime dimming, and the nighttime dimming function . However, not only was there a difficulty in detracting the aesthetics of the city or the roadside, but also the equipment cost and the labor cost for the installation were large, which made economic difficulties.

Accordingly, the inventor of the present invention has developed a LED streetlight device for dimming control in consideration of the above-described conventional dimming technology.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an LED lighting module capable of reducing the installation cost by automatically turning on / off the LED light module according to the ambient brightness of the streetlight, And an object of the present invention is to provide an excellent integrated dimming LED (LED) streetlight device.

According to an aspect of the present invention, there is provided a streetlight control system including an AC power input terminal through which an AC 220 V power is input, an ambient light measuring circuit for receiving ambient light of the streetlight, Receives the LED SMPS AC power input received from the streetlight control unit 10 and converts it into a DC power suitable for driving the LED light emitting module 30 and supplies it to the LED light emitting module 30 The LED SMPS power supply unit 20 performs the function of outputting the power to the LED SMPS 20. DC power source and emits illumination light in a visible light region through a plurality of arrayed LED lights. The LED light emitting module 30 is a commercial LED module that can determine the intensity of the illumination light output according to the voltage and current amount of an input DC power source ).

Another aspect of the present invention is that the LED streetlight includes a streetlight control unit 10 to which an AC 220 V power source is input through an AC power input terminal and an ambient light measuring circuit 15 receives ambient light of the streetlight, (20), and a LED light emitting module (30); The streetlight control unit 10 protects the internal circuit from an abnormally high surge voltage that flows due to a lightning strike on AC-L and AC-N AC power input through the AC power input terminal of the control line connection unit 17 A control unit surge protection circuit 16 for receiving an AC power input and a DC power source for outputting a DC power for use in the streetlight control unit, a control unit self power supply circuit 11, a control unit surge protection circuit 16, Off control is received from the controller microcontroller circuit 13 by receiving the DC power from the power supply circuit 11 of the control unit itself and receiving the LED SMPS on / A control unit AC switch circuit 12 for generating an AC-L output and transmitting the generated AC-L output to the LED SMPS power connection terminal of the control unit line connection unit 17, A control microcontroller circuit 13 for operating the operation algorithm through the timer function incorporated in the microcontroller and the microcontroller and the like using the DC power supplied from the power supply circuit 11 of the controller itself as the operation power, A control unit peripheral light measurement circuit 15 for performing on / off control of the LED illumination light output and a measurement function for ambient light as a basis for dimming control, and a DC power supply A control unit dimming output combining circuit 14 which receives the dimming control signal from the control unit microcontroller circuit 13 and synthesizes the dimming control output and transmits it to the LED SMPS dimming connection terminal of the control unit line connection unit 17 .

As described above, according to the present invention, without installing a conventional complicated and costly streetlight remote control system or a separate device for late-night dimming control in the streetlight pile, the dimming LED streetlight of the present invention, The LED light emitting module according to the present invention can perform the automatic point-on / light-off operation and the night-time dimming function by itself.

In addition, the dimming LED streetlight device of the present invention can provide an LED streetlight device having high energy efficiency and efficient installation cost, and can be easily installed without an auxiliary device, Lt; / RTI >

FIG. 1 is a diagram showing a dimming LED streetlight device according to an embodiment of the present invention,
2 is a detailed block diagram of a streetlight control unit for explaining the dimming LED streetlight device of the present invention,
3 is a detailed circuit diagram of a streetlight control unit for explaining the dimming LED streetlight device of the present invention,
4 is a flowchart of an operation algorithm for explaining the dimming LED streetlight device of the present invention.

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

 FIG. 1 is a block diagram illustrating a dimming LED streetlight device according to an embodiment of the present invention. The present invention is characterized in that the LED light emitting module 30 is automatically turned on and off according to the surrounding brightness of the streetlight, (LED) streetlight device having a light emitting diode (LED).

That is, the power saving DIMMING LED streetlight device of the present invention automatically controls the lighting and lighting of the LED light emitting module 30 according to the ambient brightness using the ambient light measuring circuit of the control unit under the control and control of the streetlight control unit 10, It is an LED streetlight device that improved the nighttime dimming function using a synthesizing circuit to be implemented in a controller microcontroller circuit.

The dimming LED unit of the present invention is mainly composed of the lamp control unit 10, the LED SMPS power supply unit 20 and the LED light emitting module 30. In the lamp control unit 10, And an ambient light measuring circuit 15 receives the ambient light of the corresponding street lamp as an illuminance sensor.

The streetlight control unit 10 has a microcontroller application circuit configuration. The ambient light measurement circuit 15 grasps the ambient light state and controls the ON / OFF of the illumination light output for the LED streetlight device of the present invention and the dimming control As shown in FIG.

Therefore, in the streetlight control unit 10, the AC power input terminal receives the AC 220 V power input and the ambient light input, and the AC output having the ON / OFF control as the LED SMPS power connection terminal is connected to the LED SMPS power supply unit 20 through the LED (For example, 0 to 12 V or 1 to 12 V) to the LED SMPS power supply 20 to the LED SMPS dimming control input to the LED SMPS dimming connection terminal Supply.

The LED SMPS power unit 20 includes a switch mode power supply (not shown) that receives an AC power input (for example, AC 90 to 250 V) and a dimming control input through the corresponding connection terminal and provides a DC output (42 V) (Switched Mode Power Supply: SMPS), which is a type of electronic power supply that includes a switching regulator to efficiently convert power.

The LED SMPS power supply unit 20 receives the LED SMPS AC power input received from the streetlight control unit 10 and converts it into a DC power source suitable for driving the LED light emitting module 30. The LED SMPS power supply unit 20 converts the DC current amount determined according to the LED SMPS- And outputs it to the LED light emitting module 30.

The LED light emitting module 30 is a commercial LED module that receives DC power and emits light for visible light in a plurality of arranged LED light sources. The LED light emitting module 30 is a commercial LED module that receives a voltage (for example, about DC 42 V) About 0 to 3 A), the intensity of the illumination light output can be determined.

The dimming LED streetlight device of the present invention operated as described above The integrated LED streetlight device having the automatic spotlighting and off-night dimming function of the LED light emitting module according to the surrounding brightness of the streetlight and having the self- will be.

2 is a detailed block diagram of a streetlight control unit for explaining the dimming LED streetlight device of the present invention. The streetlight control unit shown in Fig. 1 includes a control unit surge protection circuit 16, a control unit internal power supply circuit 11, a control unit AC switch circuit 12, a control unit microcontroller circuit 13, a control unit ambient light measurement circuit 15, A dimming output combining circuit 14 and a control line line connecting section 17. [

The control section surge protection circuit 16 protects the internal circuit from an abnormally high surge voltage that is caused by a lightning strike on the AC-L and AC-N AC power input through the AC power input terminal of the control line connection section 17 This is a circuit composed of a surge arrester (surge arrester 2-pole or 3-pole discharge tube) or a varistor (TNR, ZNR electronic component) that suppresses the transient voltage.

The AC-L via the control section surge protection circuit 16 is applied to the power supply circuit 11 of the control unit itself and the control unit AC switch circuit 12, and AC-N is applied to the AC-N-OUT of the LED SMPS connection terminal do.

The power supply circuit 11 of the control unit itself is a power supply circuit that receives an AC power source (AC 220 V) and outputs a DC power source (for example, DC 5 V, DC 3.3 V) for use in the streetlight control unit. The control unit AC switch circuit 12 is supplied with AC power inputted through the control line connection unit 17 and inputted through the control unit surge protection circuit 16 and is supplied with DC power from the power supply circuit 11 of the control unit itself, OFF control signal from the controller circuit 13 to generate an AC-L output on / off control and transmits the AC-L output to the LED SMPS power connection terminal of the control line line connection unit 17. [

The controller microcontroller circuit 13 receives the ambient light measurement analog signal (for example, DC 0 to 2 V) supplied from the ambient light measuring circuit 15 of the control unit ambient light measuring circuit 15, The power supply (eg DC 3.3 V) is used as the operation power and the operation algorithm is operated through the timer function incorporated in the microcontroller and microcontroller. Supplies the resulting LED SMPS on / off control signal output to the control unit AC switch circuit 12, and supplies the resulting dimming control signal to the control unit dimming output combining circuit 14. [

The ambient light measuring circuit 15 is configured to perform the on / off control of the LED illumination light output and the measurement of the ambient light as a basis for the dimming control. The ambient light measurement circuit 15 receives the ambient light, And supplies an analog signal (for example, DC 0 to 2 V) to the control section microcontroller circuit 13.

In particular, since the ambient light input window of the control unit ambient light measuring circuit 15 is disposed at a position (for example, on the upper side of the LED street lamp housing) that is not affected by the LED illumination light output by the LED street light device of the present invention, .

The control unit dimming output synthesizing circuit 14 uses the DC power source (for example, 3.3 V) supplied from the power source circuit 11 of the control unit as the operation power source and receives the dimming control signal from the control unit microcontroller circuit 13, Synthesizes the control output (for example, 0 to 12 V or 1 to 12 V) and transmits it to the LED SMPS dimming connection terminal of the control unit line connection unit 17.

The control line line connection unit 17 is provided with an AC power input terminal, an LED SMPS power connection terminal, and an LED SMPS dimming connection terminal as means for facilitating wiring between the streetlight control unit and other components.

3 is a detailed circuit diagram of a streetlight control unit for explaining the dimming LED streetlight device of the present invention. The AC power source (for example, AC 90 to 250 V) drawn through the control line line connection part 17 is connected to a surge protection element SA1 of the control part surge protection circuit 16 via a lightning surge or the like After the abnormal transient voltage is removed, the control unit itself is supplied to the LED SMPS power connection terminal of the power supply circuit 11 and the control line connection unit 17.

The power source circuit 11 of the control unit receives the AC input whose surge is removed through the surge protection circuit 16 of the control unit and converts the AC input to a low voltage AC (for example, 12 V) through the power transformer PT1, And then the voltage is converted to a low voltage DC (for example, DC 12 V) voltage via the bridge diode BD1.

After removing the low surge voltage that may still remain through the surge protection diode D1, the ripple generated in the process of converting AC to DC through the capacitor C1 is removed to provide a flat DC power source.

Thereafter, the first regulator U1 is a regulator for DC 5V output, and obtains a stable DC 5V which is not affected by the change of the input voltage through C2 (capacitor) and supplies it to the control unit AC switch circuit 12.

The control unit's own power supply circuit 11 supplies the DC 5 V power obtained through the DC 5 V regulator U1 and the capacitor C2 to the DC 3.3 V output regulator and the smoothing capacitor BC1 and the condenser C2 via the second regulator U2, C3 to supply a stable DC 3.3 V power to the control unit microcontroller circuit 13, the control unit ambient light measurement circuit 15, and the control unit dimming output synthesis circuit 14, respectively.

The control unit AC switch circuit 12 has a semiconductor type AC relay (SSR1: Solid State Relay) having a semi-permanent characteristic of operating life, a photocoupler (OC1) for driving the relay, and a driving current amount supplied to the photocoupler And a current resistance R1 for driving the photocoupler for proper determination.

DC 5 V and DC 3.3 V are supplied from the control unit's own power supply circuit 11 to be used as an operation power source and supplied with an LED SMPS on / off control signal from the control unit microcontroller circuit 13.

In the operation of the control unit AC switch circuit 12, when the LED SMPS ON / OFF control signal is HIGH (for example, 3.3 V), the photocoupler OC1 is turned off and the input terminals IN-P, IN -N).

At this time, the relay SSR1 is turned off, and the AC output supplied to the LED SMPS power connection terminal of the control line connection unit 17 is turned off. When the LED SMPS on / off control signal is LOW (0 V, for example) The coupler OC1 is turned on and current is supplied to the inputs IN-P and IN-N of the relay SSR1.

At this time, the relay SSR1 is turned on, and the AC output supplied to the LED SMPS power connection terminal of the control line connection unit 17 is turned on.

The control unit ambient light measuring circuit 15 receives the ambient light and supplies the measured ambient light analog signal (for example, DC 0 to 2 V) to the control unit microcontroller circuit 13. More specifically, A sensitivity adjustment resistor R6 for determining the operation sensitivity of the sensor element U4 and the ambient light sensor element U4 and a current-voltage conversion resistor R5 for converting the output current, which is added or subtracted in accordance with the light amount of the ambient light, Respectively.

As the ambient light from the streetlight is weak (for example, 0 Lux), the output is close to 0 V. The higher the ambient light (for example, 1 to 1000 Lux or more), the higher the DC voltage in the range of 3.3 V or less.

The control unit dimming output synthesizing circuit 14 includes a photocoupler OC2 for synthesizing dimming outputs, a photocoupler driving power resistor R7 for appropriately determining the amount of the driving current to be input to the photocoupler, And a bias resistor R8 for determining the voltage level of the dimming control output (for example, any value within 1 to 10 V).

 Therefore, DC 3.3 V is supplied from the power source circuit 11 of the control unit itself, and is utilized as the operation power source, and operates by receiving the dimming control signal from the control unit microcontroller circuit 13.

In the operation of the control unit dimming output combining circuit 14, when the LED SMPS dimming control signal is HIGH (for example, 3.3 V), the photocoupler OC2 is turned off and the voltage level of the dimming control output (for example, No current flows through the bias resistor R8 for determining the value of the bias resistor R8.

This results in maintaining the initial voltage of 10 V between the LED SMPS dimming control output (+) and the dimming control output (-) applied by the LED SMPS power supply shown in FIG. 1, so that the LED SMPS power supply is 100% Thereby driving the LED light emitting module.

The photocoupler OC2 is turned on in the LOW (e.g., 0 V) state of the LED SMPS dimming control signal of the control unit dimming output combining circuit 14 and the voltage level of the dimming control output (for example, any value within 1 to 10 V) A current flows through the bias resistor R8 for determining the bias current.

This results in that the LED SMPS power supply unit is impressed to a predetermined level between the LED SMPS dimming control output (+) and the dimming control output (-), which is the initial voltage applied through the serial bias resistor built in the LED SMPS power supply unit, The SMPS power supply unit drives the LED light emitting module with a predetermined brightness (for example, 60% brightness, determined by a resistor R8) that is less than 100%.

The controller microcontroller circuit 13 includes reset circuits R3 and C4, a boot circuit R2 (Firmware Upgrade mode vs. normal operation mode determination, normal operation mode), and the like in order to provide a basic operating condition of the microcontroller. A power filter circuit composed of a bypass capacitor BC2 for stabilizing the operating power and an inductor L1 and a bypass capacitor BC4 for supplying stable power with noise removed to the analog component inside the microcontroller , A resistor R4, a bypass capacitor BC3, and a switch RDSW1.

Therefore, according to the dimming LED streetlight device of the present invention, in addition to the basic low power consumption characteristics of the LED streetlight, it is possible not only to have a high power saving capability through late-night automatic dimming but also to improve the beauty of the city and the road through the beautiful design of the luminaire itself have.

The controller microcontroller circuit 13 converts the analog value of the ambient light measurement signal supplied from the controller ambient light measurement circuit 15 into a digital value through an A / D converter (Analog to Digital Converter), which is an internal component of the microcontroller The resulting value can then be used to operate the algorithm.

Control Particulation The detailed description of the operation of the microcontroller circuit 13 is based on the FLOW CHART of the present invention's operation algorithm shown in FIG.

4 is a flowchart of an operation algorithm for explaining the dimming LED streetlight device of the present invention. Control section Proceed as follows when the microcontroller circuit is first powered on (START).

In the microcontroller circuit of the control unit, the initialization operation of the operating parameters is carried out. The threshold value for ambient light brightness (for example, 100 Lux) is set as a threshold for transiting from the control unit ambient light measuring circuit to the daytime, It is a threshold value for nighttime transitions and is the reference value of ambient light brightness (for example 80 Lux).

Also, it is an elapsed time (reference) value (for example, 6 hours) at which the dimming operation starts, an LED SMPS AC power output initial value (for example, OFF), a lighting time timer (for example, 0 hour 0 minute and 0 second, stop state).

Initialization In the next step, the ambient light measurement signal analog / digital (A / D) conversion is performed. At this time, the controller microcontroller circuit evaluates whether the ambient light measurement value is larger than the weekly reference value.

If the weekly evaluation result is not greater than the ambient light measurement value, the process branches to the NO step and again evaluates whether the ambient light measurement value is smaller than the night reference value. If the result of the evaluation of the ambient light measurement value is large, the process branches to the A / D conversion and repeats the loop operation. If the evaluation result of the ambient light measurement value is small, the process branches to the next YES step.

If the weekly evaluation result is larger than the ambient light measurement value, the process branches to YES, sets the LED SMPS AC power output to the off state, and repeats the loop operation by branching before the A / D conversion.

On the other hand, in the step that is smaller than the ambient light measurement value than the night reference value, the LED SMPS power output is set to the ON state and the LED SMPS dimming control output is set to the OFF state (100% brightness). Therefore, in the control unit microcontroller circuit, the lighting time timer is started, and the timer is run (RUN) to start measuring the time when the lighting is maintained.

Thereafter, the controller microcontroller circuit proceeds to the next step, performs ambient light measurement signal A / D conversion, and proceeds to A / D conversion. Therefore, it is possible to evaluate whether the ambient light measurement value is larger than the weekly reference value.

If the evaluation result is larger than the ambient light measurement value, the process branches to YES. Therefore, the LED-SMPS AC power output is set to the off state (0% brightness), and the loop branches to the pre-initial stage to perform the loop operation repeatedly.

If the evaluation result is smaller than the ambient light measurement value, the process branches to the NO step. Therefore, in the control section microcontroller circuit, it is possible to evaluate whether the lighting time timer value is equal to or higher than the dimming start time value.

If the evaluation result is not less than the dimming start time value, the process branches to YES. Therefore, in the control microcontroller circuit, the LED SMPS dimming control output is set to ON (for example, 60% brightness), and the lighting time timer is set to the STOP state. Then, the algorithm branches to the A / D conversion and repeats the loop operation.

Otherwise, if the evaluation result is less than or equal to the dimming start time value, the repeating loop operation is performed by branching before the A / D conversion as described above.

As described above, the dimming LED streetlight device of the present invention can be applied to a dimming LED streetlight of the present invention without installing a conventional complicated and costly streetlight remote control system or a separate device for performing day / It is possible to perform the automatic point / light-off and the night-time dimming function by itself according to the surrounding brightness.

In addition, the dimming LED streetlight device of the present invention can provide an LED streetlight device having high energy efficiency and efficient installation cost, and can be easily installed without an accessory device, and can improve the appearance of a city or a street.

Although the present invention has been described in detail with reference to specific embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as set forth in the appended claims. It will be understood that various modifications and changes may be made thereto by those skilled in the art.

10: Street light control section
20: LED SMPS power section
30: LED light emitting module

Claims (13)

delete delete delete The LED streetlight includes a streetlight control unit 10, an LED SMPS power unit 20, and an LED light source unit 20, in which an AC 220 V power source is input through an AC power input terminal and an ambient light measuring circuit 15 receives ambient light of the streetlight, (30), characterized by comprising:
The lamp control unit 10 is provided with a control unit 13 for protecting the internal circuit from an abnormal surge voltage flowing into the AC-L and AC-N AC power source through the AC power input terminal of the control unit line connection unit 17, A protection circuit 16,
A power supply circuit for receiving an AC power input and outputting a DC power for use in the streetlight control unit 10,
The control unit microcomputer circuit 13 receives the AC power from the control unit line connection unit 17 and receives the AC power input through the control unit surge protection circuit 16, A control unit AC switch circuit 12 for receiving an on / off control signal and generating an AC-L output on / off control and transmitting it to the LED SMPS power connection terminal of the control line connection unit 17,
The controller 12 receives the ambient light measurement analog signal supplied from the ambient light measuring circuit 15 and uses the DC power supplied from the power supply circuit 11 of the controller itself as the operation power and controls the timer function built in the microcontroller and the microcontroller A controller microcontroller circuit 13 for operating an operation algorithm through the microcontroller circuit 13,
A control unit for performing on / off control of the LED illumination light output and a measurement function for ambient light for dimming control;
The control unit microcomputer circuit 13 receives the dimming control signal and synthesizes the dimming control output to output the LED SMPS dimming signal of the control unit line connection unit 17 And a control part dimming output synthesizing circuit (14) for transmitting to the connection terminal;
The controller microcontroller circuit 13 includes reset circuits R3 and C4, a boot circuit R2, a bypass capacitor BC2 for stabilizing operation power, and an analog component inside the microcontroller. A power supply filter circuit composed of an inductor L1 and a bypass capacitor BC4 for making a test mode selection and a test mode selection magnetic switch circuit composed of a resistor R4, a bypass capacitor BC3 and a switch RDSW1 A dimming LED streetlight device. delete delete 5. The method of claim 4,
The power supply circuit 11 of the control unit itself supplies the DC 5 V power obtained through the DC 5 V regulator U1 and the capacitor C2 again to the DC 3.3 V output regulator and the smoothing capacitor BC1 and the condenser BC2 via the second regulator U2, And supplies the DC 3.3 V power to the control unit microcontroller circuit 13, the control unit ambient light measurement circuit 15, and the control unit dimming output synthesis circuit 14, respectively, Device. 5. The method of claim 4,
The control unit AC switch circuit 12 includes a semiconductor type AC relay SSR1, a photocoupler OC1 for driving the same, a current resistance R1 for photocoupler driving for determining the amount of a driving current supplied to the photocoupler, And the dimming LED streetlight device. 5. The method of claim 4,
The control unit ambient light measuring circuit 15 includes an ambient light sensor element U4, a sensitivity adjusting resistor R6 for determining the operation sensitivity of the ambient light sensor element U4, And a current-to-voltage conversion resistor (R5) for converting the current into a voltage. 5. The method of claim 4,
The control unit dimming output synthesizing circuit 14 generates a dimming control signal so that the current does not flow through the bias resistor R8 for determining the voltage level of the dimming control output when the LED SMPS dimming control signal is in the HIGH state and the photocoupler OC2 is turned off And the dimming LED streetlight device. delete delete delete

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