KR101364681B1 - Led streetlight with improved radiant heat function - Google Patents

Abstract

The present invention relates to an LED streetlight with improved heat radiation function. According to one embodiment of the present invention, the LED streetlight with improved heat radiation function includes a support (2); a lamp body (20); LED modules (110); a compensating circuit (510); a protection circuit (520); and a heat radiation sheet.

Description

LED street light with improved heat dissipation {LED STREETLIGHT WITH IMPROVED RADIANT HEAT FUNCTION}

The present invention relates to an LED street light, and more particularly, by using a plurality of ribs disposed along the LED module, it is possible to efficiently prevent heat generation of the LED module and to significantly improve the heat dissipation function, and to enable stable LED street light. It is about.

A light emitting diode (LED) used in various kinds of lighting, display, etc. is a device which generates light by using a light emitting phenomenon (also called electric field light emission) caused by a combination of electrons and holes generated when a voltage is applied to a semiconductor.

The application fields of LEDs are gradually expanding from general display devices to next generation lighting devices capable of replacing incandescent lamps, fluorescent lamps, and street lamps as well as backlight emission sources for displays.

In particular, LED lighting such as LED street light using LED is recognized as the next generation light source because it is excellent in energy saving effect and can be used semi-permanently compared to other light sources. In recent years, the problem of low brightness of LED used in LED lighting has been greatly improved, and application market applying LED is spreading throughout the industry, thus realizing the LED era.

However, LEDs, which are in increasing use, have a disadvantage in that the brightness changes sensitively to the ambient temperature, and the life is shortened at high temperatures.

Although these LEDs have a life expectancy of 10 years in general environments, high-brightness LEDs, which are mainly used for street lights, have greater heat generation problems. In particular, many LEDs are used for street lights. There was a problem that the life is very short.

Accordingly, there is a demand for the development of LED streetlights that can efficiently dissipate heat generated from LEDs to the outside while providing stable use.

Korean Patent No. 10-1023961 Korean Patent No. 10-0896768

The present invention has been made to solve the above-mentioned conventional problems, by using a plurality of ribs disposed along the LED module can effectively prevent the heat generation phenomenon of the LED module and greatly improve the heat dissipation function, stable use The purpose is to provide this possible LED street light to the user.

Specifically, the present invention is to arrange the LED array consisting of a plurality of LED modules to be located along a plurality of ribs formed in the heat sink to provide a user with an LED street light that can easily emit heat generated from the LED module to the outside Its purpose is to.

In addition, an object of the present invention is to provide a user with an LED street light that can effectively prevent the phenomenon that the life of the LED module is shortened due to the heat generation, improve the reliability of the LED module, and reduce the installation cost.

In addition, an object of the present invention is to provide a user with an LED street lamp that can prevent the voltage drop that may occur between the upper portion of the lamppost is installed and the lower portion of the lamppost is powered.

In addition, an object of the present invention is to provide a user with an LED street light that can protect the circuit by preventing damage to the device even when a reverse voltage is applied.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

LED street light according to an embodiment of the present invention for realizing the above-described problem, the lamp post fixedly fixed to the ground (2), the lamp body 20 coupled to the upper portion of the lamp post (2), the lamp body 20 Installed on the lower surface of the plurality of LED modules 110 for irradiating light toward the lower portion of the lamp body 20, protrudes on the upper surface of the lamp body 20 is generated in the plurality of LED modules 110 A plurality of ribs 30 for dissipating heat to the outside, a compensation circuit 510 for preventing a voltage drop generated between the upper portion of the street lamp post 2 and the lower portion of the street lamp post 2, a reverse voltage is applied In the case of using a Schottky diode (Schottky Diode) includes a protection circuit 520 and a constant current circuit 530 to prevent damage to at least some of the plurality of LED modules 110, the plurality of LED modules 110 ) Is the longitudinal direction of the lamp body (20) A plurality of LED arrays 112 are arranged, the plurality of LED modules 110 constituting each of the plurality of LED arrays 112 are connected in series with each other, the constant current circuit 530 is a plurality of A current of a predetermined range is supplied to each of the LED arrays 112, and each of the plurality of ribs 30 forms an array extending in the longitudinal direction of the lamp body 20, and the plurality of ribs 30 are formed. Each array is parallel to each other, and the plurality of LED arrays 112 are arranged to be positioned along an array of the plurality of ribs 30, and the heat is emitted from the plurality of LED modules 110 using the arrangement. Can improve.

In addition, each of the plurality of ribs 30 may have a wave shape including a protrusion part 32 and an inlet part 34, and may protrude on an upper surface of the lamp body 20.

In addition, each of the plurality of LED modules 110 may be positioned to be adjacent to the center of the protrusion 32.

In addition, it is installed on the lower surface of the lamp body 20 is coupled to the heat dissipation sheet and the top surface of the heat dissipation sheet to transfer the heat generated from the plurality of LED module 110 to the plurality of ribs 30, the heat dissipation The surface in contact with the sheet is cooled, and the opposite surface may further include a cold temperature element to be heated.

In addition, a plurality of protrusions may be formed on each of the plurality of ribs 30.

In addition, each of the plurality of LED module 110 further comprises a plurality of reflecting plates installed in the shape of a truncated cone, wherein the plurality of reflecting plates reflect at least a portion of the light generated by the plurality of LED modules 110 to the lighting lamp The light irradiated toward the lower portion of the body 20 may be increased.

The present invention can effectively prevent the heat generation of the LED module by using a plurality of ribs disposed along the LED module, significantly improve the heat dissipation function, and can provide a user with an LED street light that can be used stably.

Specifically, the present invention is to arrange the LED array consisting of a plurality of LED modules to be located along a plurality of ribs formed on the heat sink to provide a user with an LED street light that can easily emit heat generated from the LED module to the outside. Can be.

In addition, the present invention can effectively provide a user with an LED street light that can effectively prevent the phenomenon of shortening the life of the LED module due to the heat generation, improve the reliability of the LED module, and reduce the installation cost.

In addition, the present invention can provide a user with an LED street light that can prevent the voltage drop that may occur between the upper portion of the lamppost is installed and the lower portion of the lamppost is powered.

In addition, the present invention can provide a user with an LED street light that can protect the circuit by preventing damage to the device even when a reverse voltage is applied.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate a preferred embodiment of the invention and, together with the description, serve to provide a further understanding of the technical idea of the invention, It should not be construed as limited.
Figure 1 shows an example of a block diagram of an LED street light that can be applied to the present invention.
2 is a side view of a structure in which an LED street light system according to an example of the present invention is installed.
3A and 3B show a bottom perspective view and a coupling view of a lamp body according to an example of the present invention.
4A to 4D show a plan view, a bottom view, a side cross-sectional view and a front view of a lamp body according to an example of the present invention.
5 is a circuit diagram showing an example of a compensation circuit and a protection circuit that can be applied to the present invention.
Figure 6 shows an example of a constant current circuit diagram that can be applied to the street lamp LED of the present invention.
7 is a circuit diagram illustrating an example of a configuration of a constant current circuit 1200 that may be applied to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the contents of the present invention described in the claims, and the entire configuration described in this embodiment is not necessarily essential as the solution means of the present invention.

In general, LED modules are widely used in electronic / communication devices that are indispensable in our daily lives and provide convenience in many areas of life.

However, the lifetime of the conventional LED module is temperature-sensitive, and the lifetime of the LED module may be shortened when the LED module is exposed for a long time under a high temperature environment. In addition, there is a problem in that it is difficult to stably use the LED module for a long period of time because it requires frequent replacement of the LED module. In order to solve these problems, many conventional heat dissipation devices have been developed, but they often have a complicated configuration and require an excessive cost.

The present invention can significantly improve the heat dissipation function by using a plurality of ribs and the arrangement of the LED module, and propose a street light LED with improved reliability.

Hereinafter, the LED street light proposed by the present invention will be described in detail.

Figure 1 shows an example of a block diagram of an LED street light that can be applied to the present invention. The LED street light 10 is the output unit 100, the sensing unit 200, the user input unit 300, A / V input unit 400, the control unit 500, the communication unit 600, memory 700, interface unit 800, the power supply unit 900, and the like. However, since the components shown in FIG. 1 are not essential, the LED street light 10 having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The output unit 100 is used to generate an output related to sight, hearing, or tactile sense. The output unit 100 includes an LED module 110, a display unit 120, a sound output module 130, and an alarm unit 140. ) May be included.

The LED module 110 is a light emitting device used in the LED street light 10 of the present invention and may generate an optical output using an electrical signal supplied from the power supply unit 900. The LED module 110 is a device in which electrons and holes meet and emit light when a current is applied to the P-N semiconductor junction, and a detailed description thereof will be omitted since it will be apparent to those skilled in the art.

The display unit 120 displays (outputs) information processed by the LED street light 10. For example, when the LED module 110 of the LED street light 10 is in operation or the temperature of the LED module 110 exceeds the reference temperature, the UI (User Interface) or Graphic User Interface (GUI) related thereto is displayed. can do. In addition, a still image or video captured by the camera 410, an image transmitted / received through the communication unit 600, a UI, a GUI, or the like may be displayed.

The display unit 120 includes a liquid crystal display (LCD), a thin film transistor liquid crystal display (TFT LCD), an organic light emitting diode (OLED), and a flexible display (LCD). It may include at least one of a flexible display, a 3D display.

The sound output module 130 outputs a sound signal related to a function (for example, operation of the LED module or abnormal sensing of the LED module) performed by the LED street light 10. The sound output module 130 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 140 outputs a signal for notifying occurrence of an event of the LED street light 10. An example of an event occurring in the LED street light 10 is when the temperature of the LED module 110 exceeds the reference temperature. The alarm unit 140 may output a signal for informing occurrence of an event in a form other than an audio signal or a video signal, for example, vibration. Since the video signal or the audio signal may be output through the display unit 120 or the sound output module 130, in this case, the display unit 120 or the sound output module 130 is a kind of alarm unit 140. May be classified.

On the other hand, the sensing unit 200 controls the operation of the LED street light 10 by detecting the current state of the LED street light 10, such as the temperature state of the LED module 110, the illuminance of light generated by the LED module 110, and the like. Generates a sensing signal for In addition, the sensing unit 200 may include a proximity sensor 210.

On the other hand, the user input unit 300 generates a user input data for controlling the operation of the LED street light (10). As described above, the user input unit 300 may include a direction key, a key pad, a dome switch, a touch pad (constant voltage / capacitance), a jog wheel, a jog switch, and the like.

Meanwhile, the A / V input unit 400 is for inputting an audio signal or a video signal, and may include a camera 410 and a microphone 420.

The camera 410 processes an image frame such as a still image or a moving image obtained by photographing a surrounding area in which the LED street light 10 is installed. The processed image frame may be displayed on the display 120. The image frame processed by the camera 410 may be stored in the memory 700 or transmitted to the outside through the communication unit 600. In this case, two or more cameras 410 may be provided according to the use environment.

For example, the camera 410 may function as an intermittent camera for performing a crime prevention function or a parking control in an area where the LED street light 10 is installed. The camera 410 for controlling the parking stop is to detect a vehicle that detects a vehicle entering the prohibited parking zone and pan, tilt, zoom to photograph the license plate of the vehicle illegally parked in the prohibited parking zone. It can be configured as a camera. The detection camera may be configured to be equipped with a fisheye lens to capture the omnidirectional image.

The microphone 420 receives an external sound signal by a microphone and processes the external sound signal into electrical voice data. The processed voice data can be converted into a form that can be transmitted via the wired / wireless Internet module 610 or the local area communication module 620 and output. The microphone 420 may be implemented with various noise removing algorithms for removing noise generated in the process of receiving an external sound signal.

The controller 500 typically controls the overall operation of the LED street light system. For example, the control and the processing for detecting the temperature of the LED module 110, the action when the LED module 110 is operating above the reference temperature and the like.

For example, the control unit 500 determines whether the reference temperature is exceeded by using the temperature of the LED module 110 measured by the sensing unit 200. If the operation temperature of the LED module 110 exceeds the reference temperature The alarm unit 140 can be used to notify the administrator.

In addition, the control unit 500 may operate the compensation circuit 510 to prevent a voltage drop generated between the upper part of the street lamp post to which the lamp is installed and the lower part of the lamp lamp to which the power is applied, and when the reverse voltage is applied. The protection circuit 520 may be operated to prevent damage to the device to protect the circuit. Furthermore, the controller may operate the constant current circuit 530 for supplying a certain amount of current to the plurality of LED modules 110 connected in series.

The communication unit 600 may include one or more modules that enable communication between the LED street light 10 and the wired / wireless communication system or between the LED street light 10 and the network in which the LED street light 10 is located. For example, the communication unit 600 may include a wired / wireless internet module 610, a short range communication module 620, a location information module 630, and the like.

The wired / wireless internet module 610 refers to a module for wired / wireless internet connection, and may be embedded or external to the LED street light system. WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), WCDMA (Wideband Code Division Multiple Access), HSDPA (High Speed Downlink Packet Access) , LTE (Long Term Evolution), or the like can be used.

The short range communication module 620 refers to a module for short range communication. Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as the short range communication technology.

The position information module 630 is a module for acquiring the position of the LED street light 10, and a representative example thereof is a GPS (Global Position System) module. According to the current technology, the GPS module calculates distance information and accurate time information from three or more satellites, and then applies trigonometry to the calculated information to obtain three-dimensional current position information according to latitude, longitude, and altitude It can be calculated accurately. At present, a method of calculating position and time information using three satellites and correcting an error of the calculated position and time information using another satellite is widely used. In addition, the GPS module can calculate speed information by continuously calculating the current position in real time.

The memory 700 may store a program for processing and controlling the control unit 500, and temporarily stores input / output data (for example, messages, audio, still images, videos, transmission and reception message history, etc.). It can also perform a function for. The memory 700 may also store a frequency of use of each of the data (eg, a frequency of use of each message and each multimedia). In addition, the memory 700 may store data relating to sound of various patterns output from the LED street light system.

The memory 700 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, an SD or XD memory, etc.). ), Random Access Memory (RAM), Static Random Access Memory (SRAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EPEROM), Programmable Read-Only Memory (PROM), Magnetic At least one type of storage medium may include a memory, a magnetic disk, and an optical disk. The LED street light 10 may operate in association with a web storage that performs a storage function of the memory 700 on the Internet.

The interface unit 800 serves as a passage with all external devices connected to the LED street light system. The interface unit 800 receives data from an external device, receives power, transfers the power to each component inside the LED street light 10, or transmits data inside the LED street light 10 to an external device. For example, external charger ports, wired / wireless data ports, memory card ports, ports for connecting devices with identification modules, audio input / output (I / O) ports, and video I / O (Input / Output) port may be included in the interface unit 800.

The power supply unit 900 receives an external power source and an internal power source under the control of the control unit 500 to supply power for operation of each component.

The various embodiments described herein may be implemented in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein include ASICs (Application Specific Integrated Circuits), DSPs (Digital Signal Processors), DSPDs (Digital Signal Processing Devices), PLDs (Programmable Logic Devices), FPGAs (Field Programmable Gate Arrays, It may be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing other functions. The described embodiments may be implemented by the controller 1000 itself.

According to a software implementation, embodiments such as the procedures and functions described herein may be implemented in separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code may be implemented in a software application written in a suitable programming language. The software code may be stored in the memory 700 and executed by the controller 500.

Hereinafter, the installation structure of the LED street light system having the above-described configuration will be described with reference to FIG. 2. 2 is a side view of a structure in which an LED street light system according to an example of the present invention is installed.

As can be seen in Figure 2, the LED street light 10 of the present invention may include a street lamp post 2 and the lamp body 20 and the like. The lamp body 20 is coupled to the upper part of the street lamp post 2, and the light may be irradiated to the lower part of the lamp body 20 by using the plurality of LED modules 110 installed on the lower surface of the lamp body 20. .

The street lamp post 2 is fixedly installed near the area where the illumination of the plurality of LED modules 110 is required, and can be fixed to the ground by a bolt or inserted into the ground. The street lamp post 100 may be designed at an appropriate height so that the plurality of LED modules 110 may radiate light with a suitable illuminance in a large area.

Street lamp post 2 is a wire connected from the ground to supply power to the plurality of LED module 110 or the camera 410 or output unit 100, the communication unit 600 of the lamp body 20 coupled to the upper portion The inside may be formed to be hollow so that it can be penetrated, and the material is preferably formed of a metal material that does not corrode rainwater.

At least one crossbar may be additionally connected to the upper portion of the street lamp post 2, and the crossbar may be installed horizontally with the ground. Like the street lamp post 2, the inside thereof may be hollow, and the material is preferably made of a metal material. When the crossbar is installed on the upper part of the street lamp post 2, the lamp body 20 may be installed on the crossbar, and the length of the crossbar may be adjusted by a manager so that light may be irradiated to a desired area.

Hereinafter, with reference to Figures 3a and 3b, 4a to 4d looks at the specific configuration of the lamp body 20 that can be applied to the present invention.

3A and 3B show a bottom perspective view and a coupling view of a lamp body according to an example of the present invention. As shown in Figure 3a and Figure 3b, a plurality of LED modules 110 are installed in the lower part of the lamp body 20 applicable to the LED street light 10 of the present invention, and protects the plurality of LED modules 110 The front cover 22 and the front cover 22 may further include a fixing member 24 for fixing to the lower portion of the lamp body 20. The front cover 22 is preferably made of a transparent material so that light generated by the plurality of LED modules 110 can be transmitted. The fixing member 24 may be detachably attached to the lamp body 20, and the front cover 22 and the fixing member 24 are coupled to each other, so that the front cover 22 is separated from the lamp body 20 when the fixing member 24 is separated from the lamp body 20. 22 and the fixing member 24 are removed from the lamp body 20 together.

4A to 4D show a plan view, a bottom view, a side cross-sectional view, and a front view of a lamp body according to an example of the present invention. As shown in FIGS. 4A to 4D, a plurality of ribs 30 protrude from the upper surface of the lamp body 20, and the plurality of ribs 30 are a plurality of LED modules installed on the lower surface of the lamp body 20. Heat generated at 110 may be released to the outside. Each of the plurality of ribs 30 is formed to protrude in an array extending in the longitudinal direction of the lamp body 20, as shown in Figure 4a each arrangement of the plurality of ribs 30 are to be formed parallel to each other Can be.

The plurality of ribs 30 may have a flat surface as shown in FIG. 4D, but a plurality of protrusions (not shown) may be further formed on each of the plurality of ribs 30. The plurality of protrusions formed on the plurality of ribs 30 may increase the contact area with air, and thus may more quickly release heat generated by the plurality of LED modules 110. It is preferable that the plurality of protrusions formed on the ribs 30 adjacent to each other protrude from each other. That is, the plurality of protrusions formed on the ribs 30 facing each other are alternately arranged, and the alternate arrangement structure of the plurality of protrusions is fluctuated while air flowing into one side and flowing out to the other side passes between the ribs 30. Hit it. In other words, the introduced air is quickly escaped from one side to the other side, and repeatedly hits the front and rear surfaces of the ribs 30 while being shaken up and down to take away more heat.

A plurality of LED modules 110 are arranged on the bottom surface of the lamp body 20, and the plurality of LED modules 110 are arranged along the longitudinal direction of the lamp body 20 as shown in FIG. 4B. The LED modules 110 arranged along the longitudinal direction of the lamp body 20 constitute the LED array 112, and the plurality of LED modules 110 constitute the plurality of LED arrays 112. The plurality of LED arrays 112 are disposed on the lower surface of the lamp body 20 to be positioned along the arrangement of the plurality of ribs 30 shown in FIG. 4A, and this arrangement structure occurs in the plurality of LED modules 110. It can greatly increase the release of heat.

As shown in FIG. 4C, the rib 30 protruding from the upper surface of the lamp body 20 may have a wave shape having a protrusion 32 and an inlet 34. In order to improve the heat dissipation function of the rib 30, the LED module 110 may be installed on the bottom surface of the lamp body 20 to be positioned below the protrusion 32.

The lower surface of the lamp body 20 may be additionally provided with a heat dissipation sheet, and the heat dissipation sheet may transfer heat generated from the plurality of LED modules 110 to the plurality of ribs 30 to facilitate the emission of heat. The heat-radiating sheet may be made of aluminum or stainless steel. The upper surface of the heat-radiating sheet may further include a cold-temperature device, and the cold-temperature device is coupled to the back surface of the heat-radiating sheet. A cold / hot device using the principle of a magnetic field generally has a characteristic that one side is cooled and the other side is heated when power is supplied. Such a cold / hot device may represent a Peltier device typically. Therefore, when power is supplied to the cold / hot device, the surface contacting the heat radiation sheet is cooled and the opposite surface is heated.

In addition, the plurality of LED modules 110 may be provided with a plurality of reflecting plates to increase the amount of light irradiated toward the lower portion of the lamp body 20. The reflector may be installed in a truncated cone shape around each of the plurality of LED modules 110 to condense the light generated by the plurality of LED modules 110. Alternatively, the surface on which the light of the reflecting plate is reflected may be formed to have a curved surface to more effectively condense the light, or may be formed to have a regular hexagon shape. The plurality of reflecting plates reflects light from the plurality of LED modules 110 in a direction other than the lower part of the lamp body 20 toward the lower direction of the lamp body 20, thereby greatly improving illuminance. It is possible.

Hereinafter, the compensation circuit 510, the protection circuit 520, and the constant current circuit 530 that can be applied to the present invention will be described with reference to FIGS. 5 to 7. 5 is a circuit diagram showing an example of a compensation circuit and a protection circuit that can be applied to the present invention, Figure 6 shows an example of a constant current circuit diagram that can be applied to the street lamp LED of the present invention, Figure 7 is a constant current that can be applied to the present invention It is a circuit diagram which shows an example of a structure in the circuit 1200.

The compensation circuit 510 is shown in a block leading to R32, R33, R6, R7, etc. of FIG. 5, and the compensation circuit 510 includes a top of the street lamp post 2 to which the lamp body 20 is coupled and a street lamp post ( The voltage drop generated between the lower parts of 2) can be prevented. In addition, the protection circuit 520 is shown in the Schottky diode of D6 of FIG. 5, and this protection circuit 520 uses a characteristic that does not operate when a reverse voltage is applied to the Schottky diode. That is, the protection circuit 520 may prevent the operation of the LED street light system when a reverse voltage is applied and may prevent damage of at least some of the plurality of LED modules 110. The constant current circuit 530 is shown in the resistor of FIG. 6, and may control to supply a predetermined range of currents to the plurality of LED modules 110 connected in series constituting the LED array 112.

Referring to FIG. 7, the constant current circuit 530 may include a buffer amplifier 1230 for receiving a reference voltage (for example, 1.24V) generated from the reference constant voltage source 1220 and a reference voltage input from the buffer amplifier 1230. It consists of the constant current output circuit 1270 which outputs the constant current of predetermined times (for example, 16 times) of the obtained reference constant current to the load 1280, and a power supply voltage is supplied from the power supply voltage source 1210. Here, the buffer amplifier 1230 is a common emitter and ground (gnd) of the differential circuit (1250) consisting of bipolar transistors (Q7, Q8, Q9, Q10, Q11) and the transistors (Q7, Q8) of the differential circuit (1250). It consists of a constant current source 1240 inserted between. The constant current source 1240 consists of transistors Q1 to Q6 and resistors R1 to R6, and flows a constant current between the common emitters of the transistors Q7 and Q8 and ground. The resistor R9 is an input resistor of the buffer amplifier 1230, the resistor R10 is an output resistor of the buffer amplifier 1230, and the capacitor C1 is an oscillation stop capacitor. The constant current output circuit 1270 uses the reference constant current input from the transistor Q44 as a reference and the cascode-connected MOS transistors M1 and M34 and the buffer amplifier 1230 which flow a base current through the transistor Q44. External resistor (REXT), MOS transistors (M1, M34) and MOS transistors (M2, M35) forming a one-to-one current mirror circuit, and MOS transistors (M1, M34) and one-to-one current MOS transistors M3 and M36 for forming a mirror circuit, transistors Q12 and Q13 for forming a current mirror circuit for supplying a base current to the output transistor Q01, a transistor Q01 for outputting a predetermined constant current, and a transistor ( MOS transistors M115 and M131 which form a switch circuit for switching a predetermined constant current output from Q01).

In addition, the compensation circuit 510, the protection circuit 520, and the constant current circuit 530 may be implemented through an SMPS circuit. The junction part of the housing of the SMPS circuit may further include a waterproof member made of silicon, and when the housing is combined, the waterproof member may be inserted to block the ingress of moisture during precipitation or snowfall, and may safely protect the circuit. The waterproof member is applicable not only to the housing of the SMPS circuit, but also to other components constituting the present invention, such as the lamp body 20, and can safely protect the LED module 110 and the like from external moisture.

According to the LED street light of the present invention as described above, it is possible to effectively discharge the heat generated from the LED module to the outside to prevent overheating of the LED module and significantly improve the life. In addition, a compensation circuit and a protection circuit may be provided to enable stable and effective operation. In addition, it is possible to greatly improve the heat dissipation effect by using the ribs and the cold and hot elements formed with projections, it is possible to significantly increase the efficiency of the illumination by using a reflecting plate.

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may be implemented in the form of a carrier wave (for example, transmission via the Internet) . The computer readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers of the technical field to which the present invention belongs.

It should be understood that the above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified such that all or some of the embodiments are selectively combined .

2: street light prop
10: LED street light
20: light body
30: rib
32:
34: inlet
110: LED module
500:
510: compensation circuit
520: protection circuit
530: constant current circuit

Claims (6)

Street lamp post fixed to the ground (2);
A lamp body 20 coupled to the upper portion of the street lamp post 2;
A plurality of LED modules (110) installed on a lower surface of the lamp body (20) for irradiating light toward the lower part of the lamp body (20);
A plurality of ribs 30 protruding from an upper surface of the lamp body 20 to discharge heat generated from the plurality of LED modules 110 to the outside;
A compensation circuit 510 for preventing a voltage drop generated between an upper portion of the street lamp post 2 and a lower portion of the street lamp post 2;
A protection circuit 520 for preventing damage to at least some of the plurality of LED modules 110 by using a Schottky diode when a reverse voltage is applied;
Constant current circuit 530;
A heat dissipation sheet installed on a lower surface of the lamp body 20 to transfer heat generated from the plurality of LED modules 110 to the plurality of ribs 30;
A cold / hot element coupled to an upper surface of the heat dissipation sheet, the surface of which is in contact with the heat dissipation sheet, and the opposite side being heated;
Sensing unit 200 for measuring the temperature of the plurality of LED module 110; And
And an alarm unit 140 generating a warning signal based on the measured temperature.
The plurality of LED modules 110 constitute a plurality of LED arrays 112 arranged along the longitudinal direction of the lamp body 20,
The plurality of LED modules 110 constituting each of the plurality of LED arrays 112 are connected in series with each other,
The constant current circuit 530 is to supply a current of a predetermined range to each of the plurality of LED array 112,
Each of the plurality of ribs 30 forms an array extending in the longitudinal direction of the lamp body 20,
Each arrangement of the plurality of ribs 30 is parallel to each other,
The plurality of LED arrays 112 are arranged to be positioned along the arrangement of the plurality of ribs 30, and improves the heat dissipation of the plurality of LED modules 110 by using the arrangement.
Each of the plurality of ribs 30 has a wave shape including a protrusion part 32 and an inlet part 34 and protrudes from an upper surface of the lamp body 20.
Each of the plurality of LED modules 110 is made to be positioned adjacent to the center of the protrusion 32,
Each of the plurality of ribs 30 is provided with a plurality of protrusions,
LEDs, characterized in that the plurality of protrusions formed on the first rib, which is one of the plurality of ribs 30, is alternately projected alternately with the plurality of protrusions formed on the second rib adjacent to the first rib. Street lamp. delete delete delete delete The method of claim 1,
A plurality of reflecting plate is installed in each of the plurality of LED module 110 in the shape of a truncated cone;
The plurality of reflecting plate reflects at least a portion of the light generated by the plurality of LED modules 110 to increase the light irradiated toward the lower portion of the lamp body (20).

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