KR20230013526A - Over current fire protection apparatus for electric signboard - Google Patents

Abstract

One embodiment of the present invention provides an apparatus for preventing a fire caused by an over-current on an electric signboard, which comprises: a main control unit (200) generating display data frame by frame for the video to be displayed on an electronic signboard and calculating expected current consumption when basic environmental data and display data are displayed on an LED module to calculate and output a reference current in real time to determine whether there is an over-current for each LED module; and an over-current monitoring control unit (300) measuring the actual current consumption in the LED module that displays the display data and comparing the measured current with the reference current to shut off the power supplied by a power supply unit to the LED module when the over-current is considered to be present.

Description

Overcurrent fire prevention device of electric signboard {OVER CURRENT FIRE PROTECTION APPARATUS FOR ELECTRIC SIGNBOARD}

The present invention relates to an electric display board, and more particularly, to an overcurrent fire prevention device for an electric display board configured to prevent a fire caused by overcurrent consumption of an LED module constituting the electronic display board.

Generally, as a means of delivering text and images to an unspecified number of people using one medium, it is well known that outdoor billboards are widely used as large information boards in playgrounds, traffic information boards on roads, railroad passenger/destination information boards, outdoor billboards, etc. is a fact of

The electronic display board, which is used in various ways, is configured so that the main controller properly re-edits video sources such as text, images, videos, etc., and video sources transmitted from the operating unit including operating equipment such as operating PCs, and displays them on the LED module.

To this end, the display board has a main controller that reproduces the image and transmits the displayed image to the local controller, transmits the image to the LED module and controls the LED module to receive the displayed image and display the displayed image of the defined area to the LED module. It consists of a display panel composed of a local controller, a plurality of LED drivers and a plurality of LED modules arranged in a plate shape, a power supply device for operating them, and an electronic display board body composed of electrical and electronic components.

These outdoor signboards are mainly caused by temperature difference, rain, snow, and leaks caused by meteorological factors such as salty fog in the case of the seaside, causing overcurrent to flow more than necessary due to corrosion of electric and electronic elements and PCB patterns inside the signboard and deterioration of electronic components. It has a problem of causing overheating and fire by

For this reason, Korean Patent Registration No. 10-1895849 discloses a technology for determining whether an abnormal sign of fire or a fire has occurred in an electric signboard by including an environment sensing unit including at least one of a temperature sensor, a humidity sensor, and a smoke sensor. However, in the case of the above-mentioned prior art, the accuracy is not high, so in 2019, the Fire and Disaster Headquarters announced that mobilization due to malfunction of the fire smoke detection sensor reached 7.6%. In addition, in the case of a smoke detection sensor to which infrared (IR), ionization, and CO sensors are applied, a detection area is required, and the detection ability for damage, instantaneous ignition, and extinction due to overcurrent of electronic elements is poor.

Accordingly, Korean Patent Registration No. 10-2237862 discloses that after measuring the current of a drive driver module that controls the driving of LED pixel panels (LED modules), overcurrent is applied when the measured current is greater than a preset amount of current. Disclosed is a fire prevention technology caused by overcurrent of an electronic display board that determines and cuts off current supplied to a driving driver module.

However, the required overcurrent of the unit electronic elements of the LED pixel panels is not a current set for monitoring, but varies from several mA to several A depending on the displayed image. Therefore, even if the set current is varied, comparing the current consumed by the LED pixel panels in real time with the current set for determining the overcurrent has a problem in that it is not possible to accurately determine the occurrence of the overcurrent. For example, if the image display data is displayed only in half of the LED module, it is not overcurrent when comparing the set current and the detected current, but if overcurrent flows in the corresponding part due to problems with electronic elements and PCB patterns, etc. Even if a fire breaks out, you won't know. That is, since the current consumption of the LED module varies greatly depending on the distribution of LED light emission of the LED module and the LED luminance, an error occurs when determining whether an overcurrent occurs with an arbitrarily set reference value for determining the overcurrent. It is not possible to judge whether In this case, the occurrence of overcurrent acting as a cause of fire can be detected only when the fire becomes larger and consumes more than the set current.

In addition, in the case of fire monitoring by 'fire and smoke video analysis device' in the prior art, data captured in real time by a camera is analyzed, but it is also difficult to detect ignition and extinction due to instantaneous overcurrent on the shooting area and PCB pattern there is

In addition, in the case of determining whether the light emitting module is normal or not through the reduction ratio by referring to the input/output voltage value of the prior art light emitting module and the gamma value of the lookup table, there is a problem in measuring and determining the voltage drop, and this technology transmits data signals There is a problem that is not applicable when current is input as a power source for driving an actual electronic display board in a method that is often used.

Republic of Korea Patent No. 10-1895849 Republic of Korea Patent No. 10-2237862

Therefore, one embodiment of the present invention for solving the above-described problems of the prior art is the number of pixels of the LED module displaying the image from the image expression data input to the LED module of the electronic signboard, the number of RGB per pixel, the color gradation per RGB, By calculating the current consumption of each gradation, the current consumption of the LED modules is calculated in real time, and the current consumed by the LED module unit is detected and compared when the image of the LED modules is displayed. It is a task to be solved to provide an overcurrent fire prevention device of an electric signboard that can prevent a fire due to fire.

An embodiment of the present invention for achieving the above-described solution of the present invention generates expression data frame by frame for the expression image to be expressed on the electric signboard, and the expected consumption consumed when the basic environment data and expression data are expressed on the LED module The current is calculated to calculate the reference current for overcurrent determination for each LED module in real time, the calculated reference current is transmitted to the overcurrent monitoring and control unit 300, and the generated display data is transmitted to the local controller 120-n At the same time, the main controller 200 transmits a synchronization control signal to the overcurrent monitoring and control unit 300; and an overcurrent monitoring and controlling unit (300) which compares actual consumption current in the LED module expressing the expression data with the reference current and cuts off the power supply of the power supply unit supplied to the LED module when it is determined to be overcurrent. It provides an overcurrent fire prevention device for electric signage, characterized in that.

When receiving expression data from the main control unit 200, the local controller 120-n extracts expression data of a region set for itself from the expression data and controls the expression data with an LED module array composed of LED modules. Characterized in that it is configured to transmit a signal.

The main control unit 200 generates display data frame by frame for the image to be displayed on the display board, transmits the generated display data to the local controller 120-n, and controls synchronously with the overcurrent monitoring control unit 300 An expression data generator 210 that transmits a signal; Based on the generated expression data to be expressed in the LED module, the current to be consumed by each pixel of the LED module, the basic environment data and the expected current consumption by pixel of the expression data are calculated to calculate the reference current for determining the overcurrent for each LED module in real time, a current calculator 220 that transmits the calculated reference current to the second state management unit 330; and transmitting the setting and release commands of the overcurrent monitoring and controlling unit 300 to the overcurrent monitoring and controlling unit 300 to set an overcurrent flag FLAG to 'normal' so that power is normally supplied to the LED module. It outputs the location and alarm of the LED module that has failed, periodically requests status information from the overcurrent monitoring and control unit 300 to display the received status information, and stores transmitted and received communication data and occurrence time information Thus, the first state management unit 230 provides an interface so that the operator can read the stored information and understand the flow of failures including the distribution rate or trend of failures.

The basic environment data is red (R), green (G), and blue (B) LED chip gradation level consumption current, luminance level level consumption current rate, number of LEDs, and number of LED chips per pixel (in case of 3 colors: red, green) Application of LED chip, in case of full color: application of red, green, and blue LED chips), driving constant current for each red, green, and blue LED chip in the drive IC of the LED module, LED module based on the off state of all LEDs It includes the basic current consumption of , the display resolution of the LED display board, the structure data of the connection between the measurement comparator 310 of the overcurrent monitoring and control unit 300 and the LED modules, and information on the overcurrent rate.

In the overcurrent monitoring and controlling unit 300, the number of first measurement comparison units to nth measurement comparison units corresponding to the number of LED modules supplied with power from the power supply unit 140 are arranged to supply power to each LED module After measuring the actual consumption current when displaying data from each LED module, it is compared with the corresponding reference current at the set current address to determine the presence of overcurrent, and state management of the presence or absence of overcurrent and the measured actual consumption current and reference current a measurement comparison unit 310 that records the 'overcurrent flag' of the address; If the record of the 'overcurrent flag' of the status management address is 'failure', that is, the occurrence of overcurrent, the supply of power to the power supply unit that supplies power to the LED module is cut off, and the fault is released by completing the action on the faulty LED module. a power control unit 320 that allows the power supply unit 140-n to supply power when the 'overcurrent flag' is set to 'normal'; And when receiving the reference current from the current operation unit 220, it is stored in the temporary storage, and as soon as the synchronization control signal is received from the expression data generating unit 210, the reference current stored in the temporary storage is overwritten to the set current address, and the state of overcurrent and Displaying the power control state and setting the 'overcurrent flag' to 'normal' when receiving a signal from the main controller 200 to set the 'overcurrent flag' of a specific LED module or all LED modules to 'normal' It is characterized in that it is configured to include; a second state management unit 330.

Recording in the state management address of the measurement comparison unit 310 records the 'overcurrent flag' of the state management address as 'failure' if it is determined to be overcurrent, and it is determined that it is normal, not overcurrent, but the previous 'overcurrent flag' is ' In the case of 'failure', it is characterized in that the 'overcurrent flag' is not recorded as 'normal' and maintained as 'failure' even if the current is normal so that the operator can check the occurrence of the fault.

In the present invention having the above-described configuration, when the LED modules constituting the display board express image data, after setting the expected current consumption required for image expression as the reference current for determining overcurrent, the actual consumption current for each LED module is measured Compared to the measured current, it is determined that overcurrent exceeds a certain percentage of the reference current, so that it is possible to accurately determine whether or not overcurrent has occurred for each LED module. do.

1 is a detailed functional block diagram of an overcurrent fire prevention device 400 of an electronic display board according to the present invention.
FIG. 2 is a functional block diagram showing a state in which the overcurrent fire prevention device 400 of FIG. 1 is installed on an electric signboard.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

Embodiments according to the concept of the present invention can be made various changes and can have various forms, so specific embodiments are illustrated in the drawings and described in detail in this specification or application. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific disclosed form, and it should be understood that the present invention includes all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle. Other expressions describing the relationship between elements, such as "between" and "directly between" or "adjacent to" and "directly adjacent to", etc., should be interpreted similarly.

Terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "having" are intended to designate that the described feature, number, step, operation, component, part, or combination thereof exists, but one or more other features or numbers However, it should be understood that it does not preclude the presence or addition of steps, operations, components, parts, or combinations thereof.

In one embodiment of the present invention, the display image to be displayed on the display board is generated by frame-by-frame display data, and the expected consumption current consumed when basic environment data and display data are displayed on the LED module is calculated to determine overcurrent of individual LED modules. A main control unit 200 that calculates a reference current for the current in real time, transmits the calculated reference current to the overcurrent monitoring and control unit, transmits the generated display data to the local controller and transmits a synchronous control signal to the overcurrent monitoring and control unit; and an overcurrent monitoring and controlling unit (300) which compares actual consumption current in the LED module expressing the expression data with the reference current and cuts off the power supply of the power supply unit supplied to the LED module when it is determined to be overcurrent. It provides an overcurrent fire prevention device for electric signage, characterized in that.

When receiving expression data from the main controller 200, the local controller is configured to extract expression data of a region set for itself from the expression data and transmit expression data and control signals to an LED module array composed of LED modules. characterized by being

The main control unit 200 generates display data frame by frame for the image to be displayed on the display board, transmits the generated display data to the local controller 120-n, and concurrently controls the overcurrent monitoring control unit 300 synchronously An expression data generator 210 that transmits a signal; The generated display data to be displayed in the LED module calculates basic environment data and expected current consumption for each pixel of the display data, calculates the reference current for determining overcurrent for each LED module in real time, and calculates the calculated reference current in the first state management unit Current operation unit 220 for transmitting to the second state management unit 330 through (230); and transmitting the setting and release commands of the overcurrent monitoring and controlling unit 300 to the overcurrent monitoring and controlling unit to set an overcurrent flag FLAG to 'normal' so that power can be normally supplied to the LED module. and outputs the location and alarm of the faulty LED module, periodically requests status information from the overcurrent monitoring and control unit 300, displays the received status information, stores the transmitted and received communication data and occurrence time information, It is characterized in that it is configured to include; a first state management unit 230 that provides an interface to read the stored information and grasp the flow of failures including the distribution occurrence rate or trend of failures.

The basic environment data is red (R), green (G), and blue (B) LED chip gradation level consumption current, luminance level level consumption current rate, number of LEDs, and number of LED chips per pixel (in case of 3 colors: red, green) Application of LED chip, in case of full color: application of red, green, and blue LED chips), driving constant current for each red, green, and blue LED chip in the drive IC of the LED module, LED module based on the off state of all LEDs It includes the basic current consumption of , the display resolution of the display board, the structure data of the connection between the measurement and comparison unit 310 of the overcurrent monitoring and control unit 300 and the LED modules, and information on the overcurrent rate.

In the overcurrent monitoring and control unit 300, the number of first measurement comparison units to n-th measurement comparison units corresponding to the number of LED modules receiving power from the power supply unit is disposed and connected to supply power to each LED module, When the display data is displayed in each LED module, the actual consumption current and the reference current are compared to determine the presence or absence of overcurrent, and the measurement comparison unit (310 ); If the record of the state management address is 'failure', that is, the occurrence of overcurrent, the supply of power to the power supply unit that supplies power to the LED module is cut off, and the failure is released by the completion of the action on the LED module, so that the 'overcurrent flag' is set to 'normal'. a power control unit 320 that allows the power supply unit 140-n to supply power when set to '; And when receiving the reference current from the current calculation unit 230, it is stored in the temporary storage, and as soon as the synchronization control signal is received from the expression data generating unit 210, the reference current stored in the temporary storage is overwritten to the set current address, and the state of overcurrent and Displaying the power control state and setting the 'overcurrent flag' to 'normal' when receiving a signal from the main controller 200 to set the 'overcurrent flag' of a specific LED module or the entire LED module to 'normal' It is characterized in that it is configured to include; a second state management unit 330.

Recording in the state management address of the measurement comparison unit 310 records the 'overcurrent flag' of the state management address as 'failure' if it is determined to be overcurrent, and it is determined that it is normal, not overcurrent, but the previous 'overcurrent flag' is ' In the case of 'failure', it is characterized in that the 'overcurrent flag' is not recorded as 'normal' and maintained as 'failure' even if the current is normal so that the operator can check the occurrence of the fault.

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

In the description of the drawings and specification of the embodiment of the present invention, when only one LED module unit and an overcurrent monitoring and control unit are shown in FIG. 1, the LED module unit 110-n, the local controller 120-n, and the LED module The array 130-n, the LED modules 130-n-1 to 130-n-n, the LED modules 130-n-1 to 130n-n, and the overcurrent monitoring and control unit 300-n are indicated by reference numerals.

In contrast, when a plurality of LED module units and overcurrent monitoring and control units are shown in FIG. 2, the LED module units 110-1 to 110-n and a local controller ( 120-1~ 120-n), LED module array (130-1~ 130-n), LED module (130-1-1 ~ 130-n-n), LED module (130-1-1~130-n-n), Reference numerals denote overcurrent monitoring and control units 300-1 to 300-n.

1 is a detailed functional block diagram of an overcurrent fire prevention device 400 of an electronic display board according to the present invention.

As shown in FIG. 1, the overcurrent fire prevention device 400 is installed in the main controller 3 to generate a reference current as the expected current consumption of the LED module and monitor overcurrent The measured current obtained by measuring the current consumed by the main control unit 200 and the LED modules (130-n-1 to 130-n-n), which enable setting and control of the control unit, and the LED module (130-n-1) - If it is determined that overcurrent is supplied to a specific LED module by determining the overcurrent for each LED module (130-n-1 - 130-n-n) compared with the reference current for each 130-n-n), the specific LED module to prevent fire It is configured to include an overcurrent monitoring and control unit 300 that controls to cut off the power supplied to.

Specifically, the main control unit 200 generates the display image to be displayed on the display board in frame units, and calculates the expected current consumed when basic environment data and display data are displayed on the LED modules 130-n-1 to 130-n-n. A structure that calculates the reference current for overcurrent determination of the individual LED modules (130-n-1 to 130-n-n) in real time and transmits the calculated reference current to the overcurrent monitoring and control unit 300 and the generated display data It is configured to transmit a synchronous control signal to the overcurrent monitoring and control unit at the same time as transmitting to the local controller 120-n.

To this end, the main control unit 200 may include an expression data generation unit 210, a current operation unit 220, and a first state management unit 230.

The expression data generating unit 210 generates expression data frame by frame for an image to be displayed on the display board, and requests the current calculation unit 230 to calculate a reference current for each LED module for the generated expression data. Upon receiving calculation completion information from the current operator 230, the display data is transmitted to the local controller 120-n to be displayed on the LED module, and at the same time, a synchronization control signal is transmitted to the overcurrent monitoring and control unit 300. At this time, the synchronous control signal is used to match and compare the reference current of the individual LED modules 130-n-1 to 130-n-n with the actual consumption current by the overcurrent monitoring and control unit 300, which will be described below.

The current calculation unit 230 converts the generated expression data to be expressed in the LED modules 130-n-1 to 130-n-n to the current to be consumed for each pixel of the LED modules 130-n-1 to 130-n-n in the basic environment. The expected current consumption for each pixel of the data and display data is calculated to calculate the reference current for overcurrent determination for each LED module (130-n-1 to 130-n-n) in real time, and the calculated reference current through the first state management unit It is configured to transmit to the second state management unit 330 and report the completion of calculation and transmission to the expression data generator 210.

Here, the basic environment data is red (R), green (G), and blue (B) LED chip gradation level consumption current, luminance level level consumption current rate, number of LEDs, and number of LED chips per pixel (in case of 3 colors: red, green) Application of LED chip, in case of full color: application of red, green, and blue LED chips), driving constant current for each red, green, and blue LED chip in the drive IC of the LED module, LED module based on the off state of all LEDs Basic current consumption of the LED signboard display resolution, measurement and comparison units (330-1 to 330-n) of the overcurrent monitoring and control unit 300 and LED module connection structure data, information on the overcurrent rate (eg: 120%) .

In addition, the current calculator 230 calculates the number of pixels of the LED module for each LED module 130-n-1 to 130-n-n, the number of RGB per pixel, the RGB color gradation and consumption current for each gradation, and the state in which all LEDs are turned off. The basic current consumption information of the LED module, which is the current consumption of the LED modules 130-n-1 to 130-n-n, is stored as LED module information. In addition, the expected current consumption of the LED module is calculated in real time by calculating the current consumption for each LED module (130-n-1 to 130-n-n) with the stored LED module information and the display data generated in units of display image frames. .

An example of calculating the expected current consumption of the LED module is as follows.

256 pixels per LED module, red LED, green LED, blue LED chips, constant current of red LED, green LED, blue LED chip is 20mA

* Current consumption per pixel = ((Red value/Max gradation)*20mA+(Green value/Max gradation)*20mA+(Blue value/Max gradation)*20mA)*(Current luminance level/Maximum luminance level)*20mA

* Estimated current consumption per LED module = (basic current consumption + current consumption of 256 pixels) * overcurrent rate

The first state management unit 230 transmits the setting and release commands of the overcurrent monitoring and controlling unit 300 to the overcurrent monitoring and controlling unit 300, sets the 'overcurrent flag' to 'normal', and sets the LED module 130- n-1 to 130-n-n) to be normally supplied with power, to output the position and alarm of the LED modules (130-n-1 to 130-n-n) that have failed, and to periodically It is configured to provide an interface that requests status information from the overcurrent monitoring and control unit, displays the received status information, and uses the accumulated status information to understand the flow of failures including the distribution rate or trend of failures. And it is configured to store transmitted and received communication data and occurrence time information. The transmission/reception communication data and occurrence time information accumulated and stored in the first state management unit 230 are used to enable the operator to grasp the flow of failures including the distribution occurrence rate or trend of failures using the accumulated state information as described above. used for data analysis.

The overcurrent monitoring and control unit 300 measures the actual consumption current supplied to the LED modules 130-n-1 to 130-n-n expressing the expression data, compares the reference current with the measured current, and judges the overcurrent It is configured to cut off the power supply of the power supply unit 140-n that supplies power to the LED modules 130-n-1 to 130-n-n.

Specifically, the overcurrent monitoring and control unit 300 measures the expected current consumption and the actual consumption current for each LED module (130-n-1 to 130-n-n) and compares the measured current to determine whether the LED is overcurrent. The measurement comparison unit 310 determines whether each module 130-n-1 to 130-n-n has a failure, and the LED modules 130-n-1 to 130-n-1 according to the determination of failure by the measurement comparison unit 310 A power control unit 320 that controls power supply cut-off for each n-n) and a second state management unit 330 that enables status display and setting control for each LED module 130-n-1 to 130-n-n consists of including

The measurement comparison unit 310 receives power from the power supply unit 140, and the number of first measurement comparison units to n-th measurement comparison units 310 corresponding to the number of LED modules 130-n-1 to 130-n-n -n-1 to 310-n-n) are arranged and connected to supply power to each of the LED modules 130-n-1 to 130-n-n. Each of the first measurement comparison unit to the nth measurement comparison unit 310-n-1 to 310-n-n connected in this way supplies power to each of the LED modules 130-n-1 to 130-n-n, and After measuring the actual consumption current of the LED module, it compares with the reference current to determine the presence or absence of overcurrent, and records the presence or absence of overcurrent and the measured actual consumption current and reference current in the status management address.

If the recording in the state management address of the measurement comparison unit 310 is determined to be overcurrent, the 'overcurrent flag' of the state management address is recorded as 'failure'. If it is judged to be normal, not overcurrent, but the previous ‘overcurrent flag’ is ‘failure’, the ‘overcurrent flag’ is not recorded as ‘normal’ and maintained as ‘failure’ even if the current is normal so that the operator can check the occurrence of the fault. At this time, the recording of the 'failure' of the 'overcurrent flag' is performed by the operator after performing measures for the LED modules (130-n-1 to 130-n-n) in which the fault occurred, and then releasing the fault provided in the overcurrent monitoring and control unit 300. It is recorded as 'normal' only when a failure release command is transmitted by a button or the first state management unit 230 of the main control unit 200. In this way, when the 'overcurrent flag' is recorded from 'failure' to 'normal', the power control unit 320 turns on the power supply unit 140-n that supplies power to the corresponding LED modules 130-n-1 to 130-n-n. By turning on, power is supplied again to the LED modules 130-n-1 to 130-n-n in which failover has been performed.

The power control unit 320 cuts off the supply of power to the power supply unit 140-n that supplies power to the corresponding LED modules 130-n-1 to 130-n-n in case of recording failure of the state management address. In addition, when the failure is released by the completion of the action on the failure LED modules 130-n-1 to 130-n-n and the 'overcurrent flag' is set to 'normal' by the operator, turning on the power supply unit 140-n It is configured to perform power supply again by

The second state management unit 330 displays the presence or absence of overcurrent and the power control status, and a signal to set the 'overcurrent flag' of the specific LED module to 'normal' from the main control unit 200 for the specific LED module in which a failure has occurred. is received, the 'overcurrent flag' is set to 'normal' and the power control unit 320 is configured to supply power to the LED modules 130-n-1 to 130-n-n set to 'normal'.

2 is a functional block diagram showing a state in which the overcurrent fire prevention device 400 of FIG. 1 is installed on the electric signboard.

As shown in FIG. 2, the display board generates display data frame by frame for the display image to be displayed on the display board, calculates the expected current consumption when displaying basic environment data and display data on LED modules, and determines overcurrent for each LED module. The reference current is calculated in real time, the calculated reference current is transmitted to the overcurrent monitoring and control unit 300, and the generated expression data is transmitted to the local controller 120-n and at the same time a synchronous control signal to the overcurrent monitoring and control unit 300 The main controller 3 equipped with the main controller 200 for transmitting and each of the LED modules 130-1-1 to 130-n-n of the LED module arrays 130-1 to 130-n in the image data to be displayed. ) and the LED module array 130-n, which extracts the display data to be displayed and outputs it to the LED module array 130-n and a plurality of the LED modules 130-1-1 to 130-n-n. Supplying driving power to each LED module array (130-1-1 to 130-n) and the LED modules (130-1-1 to 130-n-n) that display images for each module (130-1-1 to 130-n-n) The electronic display board 10 including the LED module units 110-1 to 110-n including the power supply units 140-1 to 140-n that control the operation of the electronic display board 10 as needed. It is configured to include a control PC (2).

And when the overcurrent fire prevention device 400 of the electric signboard having the configuration of FIG. 1 is installed to interlock with the actual electric signboard, the main control unit 200 of the overcurrent fire prevention device 400 is in the main controller (MCU) (3) installed, the overcurrent monitoring and control unit 300 controls the power supply of each of the LED modules 130-1-1 to 130-n-n included in the LED module units 110-1 to 110-n individually. Each module unit 110-1 to 110-n is installed on the display board 10.

The main control unit 200 installed as described above generates display data for an image to be displayed on an electric signboard in units of frames, motivates it, and then outputs it. In addition, the expected current consumption for each LED module (130-1-1 to 130-n-n) is calculated from the display data generated by the LED modules (130-1-1 to 130-n-n), and each LED module (130-1-1 ~ 130-n-n) calculates the reference current for overcurrent determination, and transmits the calculated reference current to the second state management unit 330. In addition, setting and canceling commands of the overcurrent monitoring and controlling units (300-1 to 300-n) are transmitted to the overcurrent monitoring and controlling unit to set the overcurrent flag (FLAG) to 'normal' and the LED modules (130-n-1 to 130-n) It is possible to perform control including ensuring that power is normally supplied to n-n). In addition, it outputs the location and alarm of the LED modules 130-n-1 to 130-n-n that have failed, and periodically requests status information from the overcurrent monitoring and control unit to display the received status information. In addition, it is configured to store transmitted and received communication data and occurrence time information so that the operator can grasp the flow of failures including the distribution occurrence rate or trend of failures using the accumulated status information.

The overcurrent monitoring and control units 300-1 to 300-n control the power supply to determine the number of LED modules 130-n-1 to 130-n-n supplied with power from the power supply unit 140-n. A corresponding number of first measurement comparison units to nth measurement comparison units 310-n-1 to 310-n-n are arranged to supply power to each of the LED modules 130-n-1 to 130-n-n. (10) is installed.

As described above, the overcurrent monitoring and control units 300-1 to 300-n installed on the display board 10 express the expression data with each LED module 130-1-1 to 130-n-n expressing the expression data After measuring the actual consumption current supplied for this, it compares it with the reference current to determine whether there is overcurrent, and records the presence or absence of overcurrent and the measured actual consumption current and reference current in the status management address. At this time, the record of the state management address records the 'overcurrent flag' of the state management address as 'failure' if it is determined to be overcurrent. If it is judged to be normal, not overcurrent, but the previous ‘overcurrent flag’ is ‘failure’, the ‘overcurrent flag’ is maintained as ‘failure’ rather than ‘normal’ even if the current is normal so that the operator can check the occurrence of the fault. In this case, the recording of the 'failure' of the 'overcurrent flag' is performed by the overcurrent monitoring and control unit when the operator who has taken action on the faulty LED module inputs a release command through the first state management unit 230 of the main control unit 200. The setting and state management unit 330 of 300 corrects and records the record of 'failure' to 'normal' in the 'overcurrent flag' of the state management address of the corresponding LED module.

In addition, if the recording of the state management address is the occurrence of overcurrent, the supply of power to the power supply unit 140-n that supplies power to the corresponding LED modules 130-n-1 to 130-n-n is cut off, and the faulty LED module When the failure is released by the completion of the measures for (130-n-1 to 130-n-n) and the 'overcurrent flag' is set to 'normal', the power supply unit 140-n supplies power. In addition, the presence or absence of overcurrent and the power control status are displayed, and the operator can set the 'overcurrent flag' to 'normal' using the release button in the overcurrent monitoring and control unit (300-n) after taking action on the faulty LED module. By doing so, power is supplied to the LED modules 130-n-1 to 130-n-n.

As described above, the overcurrent fire prevention device 400 of the present invention sets the expected current consumption required for screen output for each LED module of the display board as the reference current, and actual consumption actually consumed when outputting the screen for each LED module By measuring the current and comparing the reference current and the measured actual consumption current in real time, it is possible to accurately determine whether the LED modules are overcurrent, thereby preventing fire caused by overcurrent accurately and quickly.

As described above, the overcurrent fire prevention device 400 of the present invention sets the expected current consumption for each LED module as the reference current when displaying an image on the LED module of the display board in frame units, and actually consumes the actual consumption for each LED module By measuring the current and comparing the reference current and the measured actual consumption current in real time, it is possible to accurately determine whether the LED modules are overcurrent, thereby preventing fire caused by the overcurrent accurately and quickly.

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention.

2: Operation control PC
3: Main controller (MCU)
10: electronic display board
110: LED module unit
110-1 to 110-n: 1st to nth LED module units
120-n: local controller (SCU)
120-1 to 120-n: 1st to nth local controllers
130-n: LED module array
130-1 to 130-n: 1st to nth LED module array
130-1-n to 130-nn: 1st to nth LED modules
140-n: power supply (SMPS: switching mode power supply)
140-1 to 140-n: 1st to nth power supply (SMPS: switching mode power supply)
200: main fisherman
210: expression data generation unit
220: current calculation unit
230: first state management unit
300: overcurrent monitoring control unit
310: measurement comparison unit
320: power control unit
330: second state management unit
310-1 to 310-n: 1st to nth measurement comparison units
400: electronic display board overcurrent fire prevention device

Claims (5)

Generates display data frame by frame for the display image to be displayed on the display board, calculates the expected current consumption when displaying the basic environment data and display data on the LED module, and calculates and outputs the reference current for overcurrent determination for each LED module in real time a main control unit 200; and
An overcurrent monitoring and control unit 300 that cuts off the power supply of the power supply unit supplied to the LED module when it is determined to be overcurrent by comparing the actual consumption current in the LED module expressing the expression data with the reference current; Overcurrent fire prevention device of electric signboard, characterized in that. The method of claim 1, wherein the main control unit 200,
An expression data generation unit that generates display data for the image to be displayed on the display board in frame units, transmits the generated display data to the local controller 120-n, and transmits a synchronous control signal to the overcurrent monitoring and control unit 300 (210);
Based on the generated expression data to be expressed in the LED module, the current to be consumed by each pixel of the LED module, the basic environment data and the expected current consumption by pixel of the expression data are calculated to calculate the reference current for determining the overcurrent for each LED module in real time, a current calculator 220 that transmits the calculated reference current to the second state management unit 330; and
Control including setting and canceling commands of the overcurrent monitoring and controlling unit 300 is transmitted to the overcurrent monitoring and controlling unit 300 to set an overcurrent flag FLAG to 'normal' so that power is normally supplied to the LED module. to display the received status information by periodically requesting status information from the overcurrent monitoring and controlling unit 300, and storing the transmitted/received communication data and occurrence time information to , a second state management unit 330 that provides an interface so that an operator can read the stored information and grasp the flow of failures including the distribution of occurrence rates or trends of failures. The method of claim 2, wherein the basic environment data
Red(R), Green(G), Blue(B) LED chip gray level consumption current, current consumption rate per luminance level, number of LEDs and number of LED chips per pixel (in case of 3 colors: application of red and green LED chips, full color In case of: red, green, and blue LED chips applied), driving constant current for each red, green, and blue LED chip in the driver IC of the LED module, basic current consumption of the LED module based on the off state of all LEDs, LED An overcurrent fire prevention device for an electric signboard, characterized in that it includes the display resolution of the signboard, the structure data of the connection between the measurement and comparison unit 310 of the overcurrent monitoring and control unit 300 and the LED modules, and information on the overcurrent rate. The method of claim 1, wherein the overcurrent monitoring and control unit 300,
The number of first measurement comparison units to n-th measurement comparison units corresponding to the number of LED modules supplied with power from the power supply unit 140 are disposed and connected to supply power to each LED module, and are displayed in each LED module. When displaying data, after measuring the actual consumption current, compare it with the corresponding reference current at the set current address to determine whether there is overcurrent, and record the presence of overcurrent and the measured actual consumption current and reference current in the 'overcurrent flag' of the status management address. a measurement comparison unit 310;
If the recording of the 'overcurrent flag' of the status management address is a fault, that is, an overcurrent, the supply of power to the power supply unit that supplies power to the LED module is cut off, and the fault is released by the completion of the action on the faulty LED module, and the 'overcurrent' a power control unit 320 that allows the power supply unit 140-n to supply power when the 'flag' is set to 'normal'; and
A second method for setting the 'overcurrent flag' to 'normal' when receiving a signal that sets the 'overcurrent flag' of the state management address of a specific LED module or all LED modules to 'normal' from the main controller 200 State management unit 330; overcurrent fire prevention device of the electric signboard, characterized in that it is configured to include. The method of claim 4, wherein the recording of the measurement and comparison unit 310 to the state management address,
If it is judged as overcurrent, the 'overcurrent flag' of the state management address is recorded as 'failure', and if it is judged to be normal, not overcurrent, but the previous 'overcurrent flag' is 'failure', the current is set to 'overcurrent' so that the operator can check the occurrence of the fault. An overcurrent fire prevention device of an electric signboard, characterized in that it maintains the 'flag' as 'disabled' without recording it as 'normal'.

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