KR101180358B1 - Two-Sided Illuminant Comprise Series Connection LED for Low-Power Display Divice - Google Patents

Abstract

PURPOSE: A low power electronic display board with a double-sided light source comprising LEDs connected in serial is provided to reduce power consumption by controlling the LED using one constant current IC included in an LED driving unit. CONSTITUTION: An electronic display board includes a substrate arranging a plurality of LEDs(104) in serial. A control unit(101) includes a storage(101a) and a controller(101b). The controller controls a flickering period, a flickering position and a flickering pattern of the LEDs to display one of a word, a number, a picture, a shape or a video inputted by a user. An LED driving unit(102) is composed of a buffer IC(102a), an address/decoder IC(102b) and a constant current IC(102c). The constant current IC drives the LEDs. An SMPS(Switching Mode Power Supply)(103) is composed of a voltage regulator(103a) and a battery(103b) and supplies power to the LED driving unit.

Description

Two-Sided Illuminant Comprise Series Connection LED for Low-Power Display Divice}

The present invention relates to a low-power LED board using a plurality of LEDs, and more particularly, by connecting a plurality of LEDs connected in series to one constant current IC output port to be symmetrically disposed on both sides of the substrate and simultaneously controlling them, thereby minimizing power consumption. The present invention relates to a low-power electric display board having a double-sided light source composed of LEDs.

In general, an LED signboard is a device that displays graphic data as light through LED pixel control, and displays various information in a visible state. The LED signboard is used as an electronic display panel of various electronic products, instrument panel, etc., and is used to deliver various information or messages such as commercial advertisements, stadiums, indoor / outdoor advertisements, multi-visions, and traffic signal displays. This LED signboard was only able to display simple letters or numbers in the early days, but recently, various shapes and sizes have been diversified, and bi-directional display of figures, pictures or videos is possible. A general LED sign may be described with reference to FIG. 1.

1 is a view schematically showing the configuration of an electric display plate having a double-sided light source according to the prior art. As shown, the electric sign 100 having a double-sided light source according to the prior art includes a control unit 101, a switching mode power supply (SMPS) 103, LED driver 102. The controller 101 according to the related art receives an image signal output from an image reproducing medium such as a personal computer (PC), a DVD player, and outputs the image signal to the plurality of LED drivers 102.

The LED driver 102 includes a constant current IC, and converts an image signal received from the controller 101 into an electrical control signal so that the constant current IC blinks the LED 104. At this time, the LED 104 is connected in parallel with the output ports of the constant current IC, emits red, green, blue or white, and typically consumes a voltage of 2V to 3V. The constant current IC of the LED driver 102 includes a plurality of output ports, and controls the plurality of LEDs 104 corresponding to the output ports. Accordingly, in order to implement a double-sided light source, at least one substrate and at least one LED driver 102 installed on the substrate and a plurality of LEDs 104 corresponding to each output port of the LED driver 102 are required.

The switching mode power supply (SMPS) 103 supplies stabilized power for driving the LED driver 1102. The number of the LED driver 102 or the controller 101 may be different according to the power supplied from the SMPS 103. The SMPS 103 supplies 5V of series power for driving the LED driver 102.

The display board 100 having the conventional double-sided light source is applied with a single voltage of 5V as a power source to blink a plurality of LEDs 104, and the voltage required for LED blinking consumes 2V to 3V and the remaining voltage is emitted as heat. Done.

2 is a schematic perspective view of an electric signboard having a double-sided light source according to the prior art. As shown in FIG. 2, the electronic display panel 100 having the double-sided light source includes a plurality of substrates including the LED driver 102, thereby increasing the size of the electronic display panel 100 having the double-sided light source. In addition, the number of LEDs 104 increases, and as the number increases, the voltage emitted by heat increases, and energy consumption increases. In addition, the heat generated due to the over-supplied voltage has a problem of shortening the life of the electronic display plate 100 having the constant current IC and the double-sided light source of the LED driver 102. In addition, as the number of LEDs 104 for realizing a double-sided light source increases, the configuration of the LED driver 102 increases, thereby increasing the defective rate of the electronic display panel 100 having the double-sided light source.

The present invention is to solve the above problems, it is possible to control a single constant current IC by connecting a plurality of LEDs in series, minimizing energy consumption by separately supplying the power supply for driving LED blinking and driving power of the LED driver. In addition, the object of the present invention is to provide a low-power electric signboard having a double-sided light source consisting of LEDs connected in series to minimize the amount of heat dissipation.

Furthermore, it is easy to input letters, figures, numbers, pictures or videos by the user, and has a double-sided light source made of series-connected LEDs having high identification power and low heat dissipation due to a plurality of LEDs connected in series on both sides. It is an object to provide a low power display board.

According to an embodiment of the present invention, a low-power electric display board having a double-sided light source consisting of LEDs connected in series according to an embodiment of the present invention has a substrate, a substrate in which a plurality of LEDs consisting of R, G, B, or white are disposed symmetrically on both sides. A plurality of auxiliary LEDs consisting of R, G, B or white arranged symmetrically on both sides, a storage unit for storing one or more of a letter, number, picture, figure or video input by a user , and a user input to a plurality of LEDs A control unit comprising a controller for controlling a blinking cycle, a blinking position, or a blinking pattern of an LED so as to display one or more characters, numbers, figures, figures, or a video; An address / decoder IC for storing control signals received from a buffer IC and converting control signals in data format into electrical control signals, and an address The LED driver consists of a constant current IC that receives a plurality of LEDs in series on both sides of the board by receiving electrical control signals from the decoder / decoder IC, and the normal power consumption of the LED driver and the remaining power or temperature after power consumption of the LED driver. It consists of a memory to store in the data format, the power consumption of the LED driving unit, the state measuring device for measuring the remaining power or temperature after the power consumption of the LED driving unit, the data of the LED driving unit and the data measured in the state measuring device compared to consumption by the voltage regulator and, supplied from an external power source and the LED driving part stabilized by lowering the emergency warning unit, the voltage to be transmitted is determined whether an error occurs in the control unit upon a change in the data occurs, and made of a battery to charge the remaining power, LED SMPS ( Switching to supply power to the drive unit) Mode Power Supply ), a cooling device for cooling the heat generated by the LED driver and a power switch for switching the external power supplied to the SMPS (Switching Mode Power Supply), the power switch to turn on / off the driving of SMPS It is done.

Furthermore, it is made of any one of a personal computer (PC), a remote controller, a personal digital assistant (PDA), a mobile phone, or a dedicated terminal, and the user inputs one or more of letters, numbers, pictures, shapes, or videos. Input , at least one of the letters, numbers, pictures, figures, or videos entered at the input is one of Bluetooth, Zigbee, Laser Communication, Wi-Fi, Wired Internet, 3G or 4G. It characterized in that it further comprises a data communication unit for transmitting and receiving data with the control unit using the method.

As described above, the present invention connects a plurality of LEDs in series on the substrate and is arranged symmetrically on both sides, and this LED is controlled by one constant current IC included in the LED driver, thereby significantly reducing energy consumption for LED blinking. Can be reduced. In addition, since the amount of heat dissipation is reduced as compared to the case of controlling a plurality of LEDs by a plurality of constant current ICs, it is possible to minimize the failure rate caused by the heat generation of the constant current IC and to improve durability.

Furthermore, by inputting letters, numbers, pictures, figures or videos to be displayed by the user to the input unit, the data communication unit may display various messages or information by transmitting the letters, numbers, pictures, figures or videos inputted to the input unit to the controller. In addition, it is possible to improve the discriminating power of the low power display board having a double-sided light source consisting of LEDs connected in series.

Furthermore, the SMPS supplies the driving power of 5V or more and less than 10V to the constant current IC of the LED driver, and the driving power of 2V or more and less than 5V, which is dropped by the voltage regulator, to the buffer IC and the address / decoder IC. It is possible to minimize the oversupply of power supplied to the constant current IC.

1 is a view schematically showing the configuration of an electric display plate having a double-sided light source according to the prior art.
2 is a schematic perspective view of an electric signboard having a double-sided light source according to the prior art.
3 is a conceptual diagram of a low power display board having a double-sided light source consisting of LEDs connected in series according to an embodiment of the present invention.
4 is a perspective view illustrating a double-sided light source consisting of LEDs connected in series according to an embodiment of the present invention.
5 is a state diagram of a low power display board having a double-sided light source consisting of LEDs connected in series according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

3 is a conceptual diagram of a low power display board having a double-sided light source consisting of LEDs connected in series according to an embodiment of the present invention. As shown, the low-power electric display board 300 having a double-sided light source consisting of LEDs connected in series according to the present invention includes a substrate 400 for symmetrically disposing a plurality of LEDs consisting of R, G, B, or white on both sides of the substrate. A plurality of auxiliary LEDs 308 made of R, G, B, or white arranged symmetrically on both sides; a storage unit 101a storing one or more of a letter, number, picture, figure, or video input by a user; Control unit consisting of a controller (101b) for controlling the flashing cycle, the flashing position or the flashing pattern of the LED 104 to display one or more of a character, number, picture, figure or video input by the user to the LED 104 ( 101) an address / decoder I for storing the control signal received from the buffer IC 102a for amplifying the control signal of the control unit, which is a data format, and converting the control signal of the data format to an electrical control signal. C 102b, an LED driver 102 comprising a constant current IC 102c which receives an electrical control signal from an address / decoder IC 102b and drives a plurality of LEDs 104 connected in series on both sides of the substrate 400, Normal power consumption of the LED driver 102, memory 301a for storing the remaining power amount or temperature after the power consumption of the LED driver 102 in a data format, power consumption of the LED driver 102, of the LED driver 102 It consists of a state measuring device (301b) for measuring the remaining amount of power or temperature after power consumption, and compares the data of the LED driving unit 102 with the data measured by the state measuring device (301b) in the event of a change in data. 101, an emergency warning unit 301 for transmitting a defect or not, a voltage regulator 103a for dropping and stabilizing a voltage, power supplied from the outside, and a rechargeable battery 103b for charging the remaining power consumed by the LED driver 102. Done with Switching Mode Power Supply (SMPS) 103 for supplying power to the LED driver 102, a cooling device 307 for cooling the heat generated by the LED driver 102, and Switching Mode Power Supply SMPS It includes a power switch 304 to turn on / off the external power applied to ().

Furthermore, the low-power LED board 300 having a double-sided light source consisting of LEDs connected in series according to an embodiment of the present invention converts and stabilizes solar energy into electrical energy to supply power to the rechargeable battery 103b of the SMPS 103. It is characterized in that it comprises a solar module 305. In addition, the present invention may further include a converter 306 for supplying driving power to the LED driver 102 by voltage dropping the power supplied from the outside.

In addition, any one of a personal computer (PC), a remote control, a personal digital assistant (PDA), a mobile phone, or a dedicated terminal, the input unit 302 for inputting one or more of letters, numbers, pictures, figures, or videos, an input unit One or more of letters, numbers, pictures, figures, or videos entered at 302 may be one or more of Bluetooth, Zigbee, Laser Communication, Wi-Fi, Wired Internet, 3G, or 4G. It further includes a data communication unit 303 for transmitting and receiving data with the control unit 101 by using the method. In addition, the LED 104 further includes an auxiliary LED switching unit 309 for blinking an auxiliary LED 308 of R, G, B or white corresponding to the LED 104 when a defect occurs.

In one embodiment, the control unit 101 may display a letter, number, picture, figure or video desired by the user by blinking the LED 104 on the low-power electric sign 300 having a double-sided light source consisting of LEDs connected in series. Make sure Letters, numbers, pictures, figures or videos can be stored directly by the user in the storage unit 101a, the controller 101b according to the blinking cycle, blinking position, blinking pattern of the LED 104 set by the user LED (104) ) To blink. The controller 101 may be implemented as an external PC including the storage 101a or a microcontroller installed therein.

In addition, the controller 101 transmits various data and control signals to the LED driver 102. If the control unit 101 is a microcontroller installed inside the electronic display board 300 having the double-sided light source, the control unit 101 receives the stabilized power from the SMPS 103 and various data to the user through the data communication unit 303. Received. The user selects various letters, numbers, pictures, figures or video data stored in the storage 101a, and the selected data is transmitted to the LED driver 102 together with the control signal by the controller. The control unit 101 stores the data received from the data communication unit 303 in the storage unit 101a, and the user can select or delete this data.

In addition, the control unit 101 transmits data from the emergency warning unit 301 when a defect occurs in the LED driver 102 or the LED 104, and the position of the LED driver 102 or the LED 104 in which the defect occurs, Display power consumption or temperature to user. The user can easily receive the information from the control unit 101 to check the LED 104 or the LED driver 102 has a defect, and can immediately replace or repair the operation, the initial response to the defect can be maintained The cost of repairs can be reduced.

In one embodiment, the LED driver 102 amplifies the control signal received from the control unit 101, the signal received from the buffer IC (102a), buffer IC (102a) for transmitting to the address / decoder IC (102b) Is converted into an electrical signal and stored, and the output port control signal is transmitted to the constant current IC 102c in accordance with a control signal transmitted from the address / decoder IC 102b and the address / decoder IC 102b. A constant current IC 102c that controls the blinking of the coupled LED.

Power for driving the LED driver 102 is supplied from the SMPS 103. At this time, since the constant current IC 102c of the LED driver 102 needs a power supply of 5 V or more, the power supply before the voltage drop is supplied from the SMPS 103. In addition, since the buffer IC 102a of the LED driver 102 and the address / decoder IC 102b require a power supply of less than 5V, the voltage regulator 103a of the SMPS 103 is supplied with a power source of a voltage drop. .

The constant current IC 102c, which consumes more than 5V of power, is connected directly to one or more LEDs 104. When the constant current IC 102c connects two LEDs 104 that consume 2V of power in series, it consumes a total of 4V and emits the remaining 1V of power as heat. If the LEDs 104 that consume 2V of power are connected in parallel, the remaining 3V of the 5V power is emitted as heat. Therefore, the low-power LED board 300 having a double-sided light source consisting of LEDs connected in series according to the present invention can minimize the power to emit the LED 104 as heat as compared to the light-emitting plate 100 having a double-sided light source in parallel, In addition to lowering power consumption, heat dissipation can be significantly reduced, improving durability.

With reference to FIG. 4, the low power electric sign 300 is a double-sided light source in which a plurality of LEDs 104 are connected in series to one LED driver 102.

4 is a perspective view illustrating a double-sided light source consisting of LEDs connected in series according to an embodiment of the present invention. As shown in FIG. 4, a plurality of LEDs 104 are connected in series on the substrate 400 to be symmetrically disposed on both surfaces, and the LEDs 104 are included in one constant current IC 102c included in the LED driver 102. By controlling), energy consumption for the LED 104 flashing can be significantly reduced. In addition, since the amount of heat dissipation is reduced as compared with the case where the plurality of LEDs 104 are controlled by the plurality of constant current ICs 102c, the failure rate caused by the heat generation of the constant current ICs 102c may be minimized, and durability may be improved.

Further, the LED driver 102 is connected to the emergency warning unit 301 and the auxiliary LED switching unit 309 in one section, whether the user is defective when the output port defect of the constant current IC 102c or the LED 104 connected in series is defective. Provide information such as and location. When the LED 104 connected in series with the constant current IC 102c of the LED driver 102 does not blink due to a defect, the auxiliary LED 308 according to the control signals of the emergency warning unit 301 and the auxiliary LED switching unit 309. Will flash. The LED driver 102 may be included in a portion of the substrate 400, and since the LEDs 104 are connected in series, the substrate 400 may be large in area, thereby increasing the number of the LEDs 104. Because of its high usability, it is possible to minimize the volume increase of the electronic sign. In addition, the LED driver 102 includes a cooling device 307 to cool the heat generated when the LED 104 blinks. The cooling device 307 cools the LED driver 102 of the air cooling method.

In one embodiment, the emergency warning unit 301 is a temperature of the heat emitted from the constant current IC (102c), the power consumption of the series-connected LED 104 or the residual power amount after the consumption to detect the defect of the LED driver 102 Is determined by the state measuring device 301b. The emergency warning unit 301 includes a memory 301a. The memory 301a includes a temperature of heat emitted from the constant current IC 102c, power consumption of the LED 104 connected in series, or residual power after consumption. It is stored as data. The emergency warning unit 301 compares the measured value measured by the state measuring device 301b with the normal measured value stored in the memory 301a, and if a difference occurs, the emergency warning unit 301 determines that it is a defect and whether the measured value and the defect are in the control unit. Send. The controller 101 operates the auxiliary LED switching unit 309 when the LED driver 102 or the LED 104 defect occurs to switch for the blinking of the auxiliary LED 308 closest to the position of the LED 104 connected in series. . The present invention is not limited thereto, and the emergency warning unit 301 may be configured such as measurement data of the LED driver 102 or a defective position of the LED 104 in the auxiliary LED switching unit 309 when the defect of the LED driver 102 is detected. Data can be sent. The auxiliary LED switching unit 309 may be included in the LED driver 102 in the same manner as the flicker driver and may be included in the constant current IC 102c to switch the power supplied to the LED 104 and the auxiliary LED 308. .

In one embodiment, the Switching Mode Power Supply (SMPS) 103 supplies the power supply of the buffer IC 102a and the address / decoder IC 102b that consumes 2V or more and less than 5V as the driving power in the LED driver 102. And a voltage regulator 103a and a rechargeable battery 103b for dropping the hazardous voltage. The SMPS 103 supplies power to the constant current IC 102c by switching a power supply of 5V or more and less than 10V supplied from the outside, and charges the power to the rechargeable battery 103b. Therefore, the low-power LED board 300 having a double-sided light source consisting of LEDs connected in series according to the present invention may use the charged power even when the power supply from the outside is not smooth, thereby blinking the LED 104. The present invention is not limited thereto, and when 5 V or more is defined as a high voltage and less than 5 V is defined as a low voltage, the driving voltage range of the LED driver 102 is not limited to 2 V or more and less than 10 V.

The SMPS 103 may further include a converter 306 for supplying power to the LED driver 102 by voltage dropping the power supplied from the outside. In addition, the solar module includes a solar module 305 converting and stabilizing solar energy into electrical energy to supply power to the SMPS (103). The electric energy converted by the solar module 305 has an effect of reducing electric energy consumption by supplying power to the rechargeable battery of the SMPS 103. In addition, the solar module 305 may be charged during the day, and power may be supplied to the LED driver 102 at a place where there is no external power supply at night. The SMPS 103 further includes a power switch 304 for switching the external power supplied to the SMPS 103 to turn on / off the driving of the SMPS 103.

In one embodiment, the input unit 302 is a PC (Personal) that the user can directly enter the letters, numbers, figures, pictures or videos to be displayed on the low-power electric sign 300 having a double-sided light source consisting of LEDs connected in series Computer), remote controller, PDA (Personal Digital Assistants), mobile phone or a dedicated terminal. In addition, since the input unit 302 is connected to a wired or wireless network communication network, the input unit 302 may download, store, and transmit content such as a picture, an emoticon, or a video to the controller 101 in real time on the Internet. The controller 101 stores the picture, emoticon, or video received from the input unit 302 in the storage unit 101a, converts the data into the controller 101b, and transmits the data to the LED driver 102. The data received by the LED driver 102 is amplified by the buffer IC 102a, converted into an electrical signal by the address / decoder IC 102b, and transmitted to the constant current IC 102c.

According to an embodiment, the data communication unit 303 may convert one or more of letters, numbers, pictures, figures, or videos input from the input unit 302 into Bluetooth, Zigbee, Laser Communication, and Wi. -Send and receive data to and from the control unit using at least one of Wi-Fi, wired Internet, 3G or 4G. In addition, the data communication unit 303 connects the control unit 101 and the input unit 302 in various communication schemes when the LED driver 102 or the LED 104 detects a defect so that the user can check the data related to the defect information.

In addition, when the control unit 101 is made of a PC, the data communication unit 303 synchronizes an external dedicated terminal, a smartphone, or a remote control through software, so that both the input by the control unit 101 and the input by the input unit 302 are performed. Make it possible.

Therefore, the user inputs a character, number, picture, figure, or video to be displayed by the user to the input unit 302, and the data communication unit 303 transmits the character, number, picture, figure, or video inputted to the input unit 302 to the controller. As a result, various messages or information can be displayed, and the discriminating power of the low power display board 300 having a double-sided light source composed of LEDs connected in series can be improved.

5 is a state diagram of a low power display board having a double-sided light source consisting of LEDs connected in series according to an embodiment of the present invention. As described above with reference to FIGS. 1 to 4, the LED panel 400 having a double-sided light source in which a plurality of LEDs 104 are directly connected to one LED driver 102 has the same letters, numbers, figures, pictures, or videos on both sides. Is displayed. Therefore, the identification is superior to the LED signboard according to the prior art. In addition, since the solar module 305 is included, it can be used even where there is no external power supply, and the input unit 302 can easily input and transmit various messages. The position and number of solar modules 305 are not limited, and a plurality of solar modules 305 may be installed at various positions.

The terms used throughout the present specification are terms defined in consideration of functions in the embodiments of the present invention, and may be sufficiently modified according to the intention, custom, etc. of the user or the operator, and thus, the definitions of the terms are used throughout the present specification. It should be made based on the contents.

While the invention has been described with reference to the preferred embodiments, which are referred to by the accompanying drawings, it will be apparent that various modifications are possible without departing from the scope of the invention within the scope covered by the claims set forth below from this description. .

100: electronic board with double-sided light source
101: control unit
101a: storage
101b: controller
102: LED driver
102a: buffer IC
102b: Address / Decoder ICs
102c: constant current IC
103: SMPS
103a: voltage regulator
103b: rechargeable battery
104: LED
300: Low power signboard with double-sided light source consisting of LEDs connected in series
301: emergency warning department
301a: memory
301b: state measuring device
302:
303: data communication unit
304: power switch
305 solar module
306: converter
307: cooling system
308: auxiliary LED
309: auxiliary LED switching unit
400: substrate

Claims (9)

A substrate in which a plurality of LEDs each consisting of R, G, B, or white are arranged symmetrically on both surfaces;
A plurality of auxiliary LEDs formed of R, G, B, or white symmetrically disposed on both surfaces of the substrate ;
A storage unit for storing one or more of a letter, number, picture, shape, or video input by the user;
A controller for controlling a blinking period, a blinking position, or a blinking pattern of the LEDs to display one or more of the text, the number, the figure, the figure, or the video inputted by the user on a plurality of LEDs
Control unit consisting of;
A buffer IC for amplifying a control signal of the control unit in data format;
An address / decoder IC for storing the control signal received from the buffer IC and converting the control signal in a data format into an electrical control signal;
A constant current IC which receives the electrical control signal from the address / decoder IC and drives the plurality of LEDs in series on both sides of the substrate
LED driver;
A memory for storing power consumption during normal driving of the LED driver, remaining power amount or temperature after power consumption of the LED driver, in a data format;
A state measuring device for measuring power consumption when driving the LED driver, power remaining after power consumption of the LED driver or the temperature
An emergency warning unit configured to compare the data measured by the state of the LED driver and the data measured by the state measuring device, and to transmit a defect to the control unit when a change in the data occurs ;
A voltage regulator for dropping and stabilizing voltage,
Rechargeable battery which charges the power supplied from the outside and the remaining power consumed by the LED driver
Is made of, SMPS ( Switching to supply power to the LED driving unit) Mode Power Supply );
Cooling device for cooling the heat generated from the LED driver and
A power switch for switching the external power supplied to the switching mode power supply (SMPS) to turn on / off the driving of the SMPS.
Low power display board having a two-sided light source consisting of LEDs connected in series. According to claim 1, wherein the low power display board having a double-sided light source using the LED connected in series,
And a solar power module for converting and stabilizing solar energy into electrical energy to supply power to the SMPS. According to claim 1, wherein the low power display board having a double-sided light source using the LED connected in series,
And a converter for supplying driving power to the LED driver by voltage dropping power supplied from an external device. According to claim 1, wherein the low power display board having a double-sided light source using the LED connected in series,
It consists of any one of a personal computer (PC), a remote control, a personal digital assistant (PDA), a mobile phone, or a dedicated terminal, wherein the user inputs one or more of the text, the number, the picture, the figure, or the video. A low power display board having a double-sided light source consisting of LEDs in series characterized in that it further comprises an input unit . The low power display board of claim 4, further comprising a double-sided light source using the LEDs connected in series.
One or more of the text, the number, the figure, the figure, or the video inputted from the input unit may include Bluetooth, Zigbee, Laser Communication, Wi-Fi, wired Internet, 3G, or 4G. Further comprising a data communication unit for transmitting and receiving data with the control unit using one or more of the communication scheme Low power signboard with double-sided light source consisting of LEDs connected in series. According to claim 1, wherein the low power display board having a double-sided light source consisting of the LED connected in series,
Auxiliary LED which blinks the auxiliary LED of R, G, B or white corresponding to the LED when a fault of the LED occurs A low power display board having a double-sided light source consisting of LEDs in series characterized in that it further comprises a switching unit . The method of claim 1, wherein the control unit,
A low-power electronic board having a double-sided light source consisting of LEDs connected in series, characterized in that either a personal computer (PC) or a microcontroller. The method of claim 7, wherein the control unit,
And transmitting data from the emergency warning unit when a defect occurs in the LED driver or the LED, and displaying the position, power consumption, or temperature of the LED driver or the LED in which the defect occurs, to the user. Low power signboard with double-sided light source consisting of LEDs connected in series. The method of claim 1, wherein the SMPS,
The driving power of 5V or more and less than 10V is supplied to the constant current IC of the LED driver, and the driving power of 2V or more and less than 5V, which is dropped by the voltage regulator, is supplied to the buffer IC and the address / decoder IC. A low power display board having a double-sided light source consisting of LEDs connected in series.

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