KR102345153B1 - Control system for led display module and control method thereof - Google Patents

Abstract

The present invention provides an LED display module in which M x N LED elements constituting a unit pixel of an image are arranged (where M and N are natural numbers greater than 2) to display all or part of an image; and a cooling module providing an air flow to the LED display module to cool the LED element to an operating allowable temperature. and a control module that provides a signal for displaying an image to the LED display module and controls an operation of the cooling module, and a control system for the LED display module and a control method thereof.

Description

LED display module control system and its control method

The present invention relates to an LED display module control system and a control method therefor, and more specifically, by efficiently driving a cooling fan by predicting the power consumption of an image transmitted to a display module, operation stability can be improved even when the weather is high. It relates to an LED display module control system and a control method therefor.

As shown in the drawing showing an example of a large LED signage system in FIG. 1, the large LED signage system, commonly referred to as 'outdoor electric signboard', is installed in a place where there is a lot of traffic by vehicles and people, such as a roadside or a shopping mall dense area. , weather information, as a kind of large display means for providing various information, such as promotional images and images, usually uses an LED element as a light emitting element for high luminance.

In particular, the large LED signage system can be installed in various places as shown in FIG. 1 , but it is installed on the roadside and has high relative utility as a means for providing traffic information, and thus is widely used as a means of providing traffic information.

Such a large LED signage system (1) forms an LED light emitting part by connecting a plurality of plate-shaped LED (LED) pixel panels in which pixels composed of one or a plurality of LED elements are formed in a matrix structure on a plane surface, and a plurality of LEDs The pixel panel provides sufficient discrimination even during the daytime by controlling light emission by a plurality of driving driver modules and providing higher luminance compared to other large display means.

That is, as shown in FIG. 1 , the large-sized LED signage system 1 is typically, as shown in the drawing for explaining the configuration of the large-scale LED signage system in FIG. The light emitting unit 20 is installed to be exposed, and means for driving the LED light emitting unit 20 are installed inside the LED signboard housing 10 .

The plurality of LED pixel panels 210 forming the LED light emitting unit 20 express text, images, and moving pictures by signals that turn on/off the LED elements of the LED pixel panel 210 in the driving driver module 30 . .

In addition, direct current to the controller unit 40 and the controller unit 40 and the driving driver module 30 for outputting output data for controlling the output of the driving driver module 30 and outputting control signals for various driving of the large LED signage A DC power supply unit (50, SMPS) for supplying power is included.

On the other hand, such a large LED electric sign system 1 is a diagram showing an example of an accident of the large LED electric sign system in FIG. 3 . Because it is exposed to direct sunlight, it may cause malfunctions due to poor cooling, especially during periods of high temperature such as summer.

Patent Document 1: Republic of Korea Patent Registration No. 10-2237862 Announcement Date April 07, 2021

An object of the present invention is to provide an LED display module control system and a method for controlling the LED display module that can predict the power consumption of the image transmitted to the display module and efficiently drive the cooling fan to increase the operational stability even when the weather is high. .

In order to achieve the above object, in the LED display module control system according to an embodiment of the present invention, M x N LED elements constituting a unit pixel of an image are arranged (here, M and N are natural numbers greater than 2), LED display module to display all or part of; a cooling module that provides an air flow to the LED display module to cool the LED element to an operating allowable temperature; and a control module that provides a signal for image display to the LED display module and controls the operation of the cooling module.

In this case, the method may further include a heat generation simulation module configured to generate an operation schedule of the cooling module by predicting power consumption and heat generation according to the reproduction of the image.

In addition, the heat generation simulation module, a temperature sensor for measuring the temperature of the LED display module; a solar sensor for measuring the intensity of sunlight incident on the LED display module; a power consumption calculation unit for calculating an amount of power consumed for displaying the image and an amount of heat; and a schedule generator for generating a cooling module driving schedule for maintaining the LED device at a predetermined temperature or less based on the measured temperature, the intensity of sunlight, and the amount of power consumption.

In addition, the power consumption calculation unit, the color versus power table for storing the power consumption for each color of the LED element; a frame pixel analyzer that divides the image into frames and pixels; and a calorific value calculator for calculating the power consumption of the LED display module according to the image playback time by substituting the value referenced in the color vs. wattage table to the image divided into pixels, and calculating the calorific value for each playback time period. have.

In order to achieve the above object, the LED display module control method according to an embodiment of the present invention includes M x N LED elements constituting a unit pixel of an image (here, M and N are natural numbers greater than 2) arranged to form an image. LED display module to display all or part of; and a cooling module providing an air flow to the LED display module to cool the LED element to an operating allowable temperature. a control module providing a signal for displaying an image to the LED display module and controlling an operation of the cooling module; and a heat simulation module for generating an operation schedule of the cooling module by predicting power consumption and heat generation according to the reproduction of the video, the method comprising: dividing the video into frames and pixels; measuring the initial temperature of the LED display module and the intensity of sunlight incident on the LED display module; estimating the amount of heat generated for each reproduction time period by summing the power consumption for each LED element and calculating the power consumption of the LED display module according to the image reproduction time; simulating a change in temperature of the LED display module based on the amount of heat generated by the reproduction time period of the image, the initial temperature of the LED display module, and the intensity of sunlight incident on the LED display module; and generating an operation schedule of the cooling module for maintaining the temperature of the LED display module at a constant temperature by substituting the cooling capability of the cooling module for the simulated temperature change of the LED display module.

According to the LED display module control system and the control method according to the present invention, it is possible to increase the stability and lifespan of the LED display module by creating an operation schedule that minimizes the high-intensity driving of the cooling module.

1 is a real photograph of a large-sized LED billboard to be described outdoors.
FIG. 2 illustrates a large-scale LED signage system used in FIG. 1 .
3 is a picture of an accident of a large LED signage system.
4 is a block diagram of an LED display module control system according to an embodiment of the present invention.
5 is a block diagram of an LED display module control system according to another embodiment of the present invention.
6 is a detailed block diagram of a heat generation simulation module.
7 is a detailed block diagram of a power consumption calculation unit.
8 is a flowchart illustrating a control method of an LED display module according to an embodiment of the present invention.
9 is an actual photograph of the LED display module.
10 is an actual photograph of the cooling module.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, it should be noted that in the accompanying drawings, the same components are denoted by the same reference numerals as much as possible. In addition, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings.

4 is a block diagram of an LED display module control system according to an embodiment of the present invention. Referring to FIG. 4 , the LED display module control system 1000 includes an LED display module 100 , a cooling module 200 , and a control module 300 .

In the LED display module 100, M x N pieces of LED elements 110 constituting a unit pixel of an image (here, M and N are natural numbers greater than 2) are arranged to display all or part of an image. It is also possible to implement a large-scale LED signboard installed outdoors with one LED display module 100 depending on the practitioner, but using a plurality of LED display modules 100 in which the LED elements 110 are arranged 16 x 16, FIG. It is possible to implement the large LED signage shown in .

According to the embodiment of FIG. 9 , the LED display module 100 may be implemented in a form in which the heat sink 120 is attached to the light emitting surface of the LED element 110 . A heat sink 120 is provided on the front surface of the substrate 130 on which the LED element 110 is disposed, and the housing 140 forming a waterproof and air flow space is combined on the rear surface. The heat sink 120 is provided with a perforation according to the arrangement interval of the LED element (100).

A driver 150 for driving the LED device 110 is disposed on the rear surface of the substrate 130 . The embodiment of FIG. 9 is only one of the possible embodiments, and the arrangement of the LED element 110, the shape of the housing, the shape of the heat sink, etc. may be appropriately modified.

The cooling module 200 provides an air flow to the LED display module 100 to cool the LED element 110 to an operating allowable temperature. 10 is an actual photograph of the cooling module. Referring to FIG. 10 , the cooling module 200 includes a case 220 coupled to the housing 140 of the LED display module 100 and a cooling fan 210 . The cooling fan 210 circulates external air into the housing 140 of the LED display module 100 to prevent the temperature of the LED element 110 from exceeding the allowable operation temperature. The embodiment of FIGS. 9 and 10 is only one of the possible embodiments of the cooling module 200 , and when using the high-brightness LED element 110 with a large amount of heat, the cooling module 200 circulates the cooling water to the heat sink 120 . It may also be carried out by a water cooling method, etc.

The control module 300 provides a signal for image display to the LED display module 100 and controls the operation of the cooling module 200 .

The control module 300 receives an image from the image server P, divides the image as many as the number of LED display modules 100 used in the large LED signage, and provides the divided image to each LED display module 100 . According to an embodiment, the control module 300 may store an image to be provided in a memory or the like and provide it to the LED display module 100 by itself.

In addition, the control module 300 transmits a signal for controlling the operation of the cooling module 200 . As a control type of the cooling module 200 , the control module 300 may control whether to operate when the temperature of the LED display module 100 exceeds a set temperature.

5 is a block diagram of an LED display module control system according to another embodiment of the present invention. The LED display module control system 1000 ′ according to the present embodiment includes an LED display module 100 , a cooling module 200 , a control module 300 , and a heat generation simulation module 400 . Since the LED display module 100 and the cooling module 200 are the same as those described in FIG. 4 , overlapping descriptions will be omitted.

The heat generation simulation module 400 generates an operation schedule of the cooling module 200 by predicting the power consumption and heat generation of the LED display module 100 according to the reproduction of an image.

The heat generation simulation module 400 may be implemented in a hardware-separated form from the control module 300, and may be implemented in a single general-purpose hardware depending on the implementer, but may be implemented in a software-only separated form. .

6 is a detailed block diagram of a heat generation simulation module. Referring to FIG. 6 , the heat generation simulation module 400 includes a temperature sensor 410 , a solar sensor 420 , a power consumption calculator 430 , and a schedule generator 440 .

The temperature sensor 410 measures the temperature of the LED display module 100 . The temperature sensor 410 may be disposed to be attached to the heat sink 120 .

The solar sensor 420 measures the intensity of sunlight incident on the LED display module 100 .

The power consumption calculation unit 430 calculates the amount of power consumed and the amount of heat generated by the image. That is, the power consumption calculation unit 430 calculates the amount of power consumed by the LED display module 100 according to the display of the image and predicts the amount of heat generation.

The schedule generator 440 maintains the LED display module 100 - that is, the LED element 100 - below a predetermined temperature based on the measured temperature, the intensity of sunlight, and the amount of power in the LED display module 100 consumed. Create a cooling module run schedule. The generated cooling module driving schedule is transmitted to the cooling module 200 through the control module 300 .

7 is a detailed block diagram of a power consumption calculation unit. Referring to FIG. 7 , the power consumption calculator 430 includes a color versus power table 431 , a frame pixel analyzer 432 , and a calorific value calculator 433 .

The color versus power table 431 stores power consumption for each color of the LED element 110 . The color versus power table 431 is a DB in which power consumption of the LED element 110 is actually measured and stored.

The frame pixel analyzer 432 divides the image into frames and pixels. The frame pixel analyzer 432 divides the image into specific playback time units and calculates the number of pixels included in the corresponding unit. For example, the frame pixel analyzer 432 calculates the number of pixels of the first color, the number of pixels of the second color,... . (I took 6-bit color as an example)

The calorific value calculator 433 calculates the power consumption of the LED display module 100 according to the image reproduction time by substituting the value referenced in the color versus power table 431 to the image divided into pixel units. That is, the calorific value calculator 433 calculates the calorific value for each playback time of the video.

The schedule generator 400 simulates a change in the temperature of the LED display module 100 based on the amount of heat generated by the image reproduction time period, the initial temperature of the LED display module 100, and the intensity of sunlight incident on the LED display module.

Then, by substituting the cooling capability of the cooling module 200 to the simulated temperature change of the LED display module 100 to generate an operation schedule of the cooling module 200 to maintain the temperature of the LED display module 100 below a certain temperature. .

8 is a flowchart illustrating a control method of an LED display module according to an embodiment of the present invention. The embodiment of Fig. 8 corresponds to a case in which the LED display module control system 1000 ' shown in Figs. 5 to 7 is implemented in time series, so the LED display module 100, the cooling module 200, the control module ( 300) and the heating simulation module 400 are directly applied to the present embodiment.

The control method of the LED display module according to the present invention includes an image analysis step (S100), a temperature/solar light measurement step (S200), a calorific value prediction step (S300), an AI-based cooling simulation step (S400), and a cooling module operation schedule generation step (S500).

In step S100, the image to be displayed on the LED display module 100 is analyzed. That is, the image is divided into specific playback time units and the number of pixels included in the corresponding unit is calculated. Step S100 is performed by the frame pixel analyzer 432 .

In step S200 , the initial temperature of the LED display module 100 and the intensity of sunlight incident on the LED display module are measured.

In step S300, the amount of heat generated by the LED display module 100 according to image reproduction is predicted. The total power consumption of the LED display module 100 is calculated according to the video playback time by summing the power consumption of each LED element 110 to predict the amount of heat generated by the playback time period. Step S300 is performed by the calorific value calculator 433 . The calorific value calculator 433 calculates the power consumption of the LED display module 100 according to the image reproduction time by substituting the value referenced in the color versus power table 431 to the image divided into pixel units. That is, the calorific value calculator 433 calculates the calorific value for each playback time of the video.

In step S400, the temperature change of the LED display module is simulated based on the amount of heat generated by the video playback time period, the initial temperature of the LED display module, and the intensity of sunlight incident on the LED display module.

Step S400 is performed by the schedule generator 400 . The temperature change of the LED display module is performed by the AI technique with reference to the temperature change compared to the power usage of the LED display module 100 actually measured by an experiment or the like.

In step S500, the cooling capacity of the cooling module 200 is substituted for the temperature change of the LED display module 100 simulated in step S400 to maintain the temperature of the LED display module 100 below a certain temperature. create a schedule Step S500 is also performed by the schedule generator 400 , and generates an operation schedule of the cooling module 200 that minimizes high-intensity driving of the cooling module 200 using an AI technique based on machine learning.

The embodiments of the present invention disclosed in the present specification and drawings are merely provided for specific examples in order to easily explain the technical contents of the present invention and help the understanding of the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

1000: LED display module control system
100: LED display module]
200: cooling module
300: control module
400: heat simulation module
P : video server

Claims (5)

an LED display module in which M x N LED elements constituting a unit pixel of an image are arranged (where M and N are natural numbers greater than 2) to display all or part of an image;
a cooling module that provides an air flow to the LED display module to cool the LED element to an operating allowable temperature;
a control module providing a signal for image display to the LED display module and controlling an operation of the cooling module; and
A heat simulation module for generating an operation schedule of the cooling module by predicting power consumption and heat generation according to the reproduction of the image,
The heat simulation module,
a temperature sensor for measuring the temperature of the LED display module;
a solar sensor for measuring the intensity of sunlight incident on the LED display module;
a power consumption calculation unit for calculating an amount of power consumed for displaying the image and an amount of heat; and
LED display module control system comprising: a schedule generator for generating a cooling module driving schedule for maintaining the LED element at a predetermined temperature or less based on the measured temperature, the intensity of sunlight, and the amount of power consumption. delete delete The method according to claim 1,
The power consumption calculation unit,
a color-versus-power table storing the power consumption for each color of the LED element;
a frame pixel analyzer that divides the image into frames and pixels; and
Comprising a calorific value calculator for calculating the power consumption of the LED display module according to the image playback time by substituting the value referenced in the color vs. wattage table to the image divided into pixels, and calculating the calorific value for each playback time period LED display module control system. an LED display module in which M x N LED elements constituting a unit pixel of an image are arranged (where M and N are natural numbers greater than 2) to display all or part of an image; and a cooling module providing an air flow to the LED display module to cool the LED element to an operating allowable temperature. a control module providing a signal for image display to the LED display module and controlling an operation of the cooling module; and a heat generation simulation module for generating an operation schedule of the cooling module by predicting power consumption and heat generation according to the reproduction of the image,
dividing the image into frames and pixels;
measuring the initial temperature of the LED display module and the intensity of sunlight incident on the LED display module;
estimating the amount of heat generated for each reproduction time period by summing the power consumption for each LED element and calculating the power consumption of the LED display module according to the image reproduction time;
simulating a change in temperature of the LED display module based on the amount of heat generated by the reproduction time period of the image, the initial temperature of the LED display module, and the intensity of sunlight incident on the LED display module; and
and generating an operation schedule of the cooling module for maintaining the temperature of the LED display module at a constant temperature by substituting the cooling capability of the cooling module for the simulated temperature change of the LED display module.

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