LED display module control method and system based on multi-point temperature monitoring

Abstract

The invention relates to the technical field of LED screens, and provides an LED display module control method and system based on multi-point temperature monitoring, and the method comprises the steps: collecting node temperature signals of a plurality of LED display modules, and obtaining a multi-point real-time temperature set of an LED display screen after preprocessing; the multi-point real-time temperature set of the LED display screen is monitored in real time, multi-stage triggering is carried out according to preset multi-stage protection thresholds, and the multi-stage protection thresholds comprise high-temperature early warning triggering and overheating protection triggering; through full-node temperature acquisition, multi-stage triggering and precise current adjustment, the problem of a temperature control blind area of an LED display screen is solved, and core heating nodes such as an LED chip and a power interface are covered; multi-stage protection is accurately triggered, a second-stage threshold value is combined with a temperature change rate, and link collaborative state multi-dimensional judgment is performed, so that the triggering accuracy is improved, and the false triggering rate is reduced; display effect and equipment safety are balanced, and short-circuit fire caused by melting of the insulating layer due to high temperature is avoided; and the safety performance of the display screen is greatly improved.

Description

A control method and system for LED display modules based on multi-point temperature monitoring Technical Field

[0001] This application relates to the field of LED display technology, and in particular to a control method and system for LED display modules based on multi-point temperature monitoring. Background Technology

[0002] As the core display carrier for outdoor advertising, commercial complexes, transportation hubs, large venues and other scenarios, LED displays have seen continuous increases in power density and installation scale. Since LED modules are mostly installed in a closed structure, heat dissipation is limited, and they are in a high-load operation state for a long time. Overheating of power interfaces, driver ICs, power cables and other parts has become one of the main causes of fires.

[0003] In existing technologies, single-point temperature sensors are typically placed on the surface of the driver IC or PCB board, failing to cover high-risk fire points such as power cord interfaces, cable connectors, and the bottom of heat sinks. For example, the contact resistance of the power cord interface increases due to frequent plugging and unplugging, and the local temperature can rise from room temperature to over 150°C within 30 minutes, while the surface temperature of the driver IC may only be 80°C, failing to trigger existing protection mechanisms, ultimately leading to a short circuit fire caused by the melting of the insulation layer.

[0004] Therefore, finding a suitable monitoring method is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, in order to solve the problems mentioned in the prior art, this application proposes an LED display module control method and system based on multi-point temperature monitoring, which can effectively and timely monitor and avoid losses.

[0006] In a first aspect, this application provides a control method for LED display modules based on multi-point temperature monitoring, applied to an LED display screen composed of multiple LED display modules, comprising the following steps: acquiring node temperature signals of multiple LED display modules, and obtaining a multi-point real-time temperature set of the LED display screen after preprocessing; monitoring the multi-point real-time temperature set of the LED display screen in real time, and triggering it in multiple levels according to preset multi-level protection thresholds, wherein the multi-level protection thresholds include: high temperature warning trigger and overheat protection trigger; if the multi-point real-time temperature set is within the threshold of the high temperature warning trigger, the output current of the LED driving circuit is dynamically adjusted according to the temperature deviation; if the multi-point real-time temperature set is within the threshold of the overheat protection trigger, an overheat protection signal is sent to the LED driving circuit to cut off the power supply of the target module.

[0007] Further, the step of collecting node temperature signals from multiple LED display modules includes: setting at least one temperature monitoring node in each LED display module, wherein the node types of the temperature monitoring node include LED chip surface nodes, driver IC pin nodes, heat sink bottom nodes, and power line interface nodes; assigning a unique identifier to each temperature monitoring node, wherein the identifier corresponds to identification information, and the identification information includes the LED module number to which it belongs, node coordinates, and associated location label, wherein the associated location label is grouped and configured according to power supply link and signal link; collecting raw temperature signals through temperature sensors matched with the temperature monitoring nodes; calibrating the collected raw temperature signals after sequentially performing RC low-pass filtering to eliminate electromagnetic interference, thereby obtaining calibrated temperature signals; and storing the calibrated temperature signals, identifiers, and associated location labels of each temperature monitoring node in association to obtain a multi-point real-time temperature set.

[0008] Furthermore, the step of acquiring the raw temperature signal through a temperature sensor matched with the temperature monitoring node includes: acquiring the raw temperature signal through a thermistor connected to the surface node of the LED chip; acquiring the raw temperature signal through a built-in temperature sensor connected to the pin node of the driver IC; acquiring the raw temperature signal through a thermocouple connected to the bottom node of the heat sink; and acquiring the raw temperature signal through a surface-mount temperature acquisition chip connected to the power line interface node.

[0009] Furthermore, the step of assigning a unique identifier to each temperature monitoring node, wherein the identifier corresponds to identification information, and the identification information includes the LED module number to which it belongs, node coordinates, and associated location label, wherein the step of configuring the associated location label in groups according to power supply links and signal links includes: power supply links are divided according to power input branches, and all temperature monitoring nodes on the same power supply branch line are marked with the same power supply link; signal links are divided according to data transmission channels, and the temperature monitoring nodes on the same signal channel are marked with the same signal link label.

[0010] Furthermore, the real-time monitoring of the multi-point real-time temperature set of the LED display screen and the multi-level triggering based on preset multi-level protection thresholds, including the steps of high temperature warning triggering and overheat protection triggering, include: dividing the LED display screen into several independent monitoring units based on the associated location tags in the multi-point real-time temperature set, with each monitoring unit corresponding to a complete power supply link and signal link; the local controller of each LED module collects the temperature data of its respective node at a preset frequency; when the highest node temperature of the monitoring unit exceeds the high temperature warning trigger threshold, or when the temperature change rate of two or more nodes under the same associated location tag is greater than the second preset temperature change rate, the high temperature warning protection state is triggered; when the highest node temperature of the monitoring unit exceeds the overheat protection trigger threshold, or when three or more nodes in the same power supply link monitoring unit simultaneously exceed the preset overheat temperature, the overheat protection state is triggered.

[0011] Furthermore, the step of dynamically adjusting the output current of the LED driver circuit based on the temperature deviation if the multi-point real-time temperature set is within the threshold for triggering a high-temperature warning includes: based on the temperature data of the multi-point real-time temperature set, taking each LED display module as an independent monitoring unit, calculating the highest temperature T_max and the temperature change rate ΔT / Δt of all temperature monitoring nodes within the monitoring unit; when the highest temperature T_max is greater than a preset threshold and the temperature change rate is greater than a preset range, determining that the module is within the high-temperature warning trigger threshold; for scenarios where multiple modules under the same power supply link trigger warnings simultaneously, determining it as a link-level high-temperature warning; the main control unit synchronously executes current adjustment commands on all LED modules under the same power supply link to achieve balanced current distribution within the link.

[0012] Furthermore, the step of sending an overheat protection signal to the LED driver circuit to cut off the power supply to the target module if the multi-point real-time temperature set is within the threshold for overheat protection triggering includes: based on the structured data of the multi-point real-time temperature set, taking each LED display module as an independent monitoring unit, calculating the highest temperature T_max and temperature change rate ΔT / Δt of all temperature monitoring nodes in the monitoring unit; when the highest temperature of a single monitoring unit is greater than a preset threshold and the temperature change rate is greater than a preset range, it is determined to be a sudden overheating trigger protection; matching the physical location of the corresponding LED module through the identification code of the temperature monitoring node to determine a single faulty module; the main control unit sends an overheat protection command; after receiving the command, the driver circuit cuts off the power supply to the target module.

[0013] Furthermore, the main control unit synchronously executes current adjustment commands on all LED modules under the same power supply link. After the step of balancing current distribution within the link, it also includes: when a link-level high temperature warning is determined, the main control unit synchronously executes current adjustment commands on all LED modules under the same power supply link to focus on monitoring the temperature of the power line interface node of the link. When the power line interface node approaches the highest temperature triggered by the high temperature warning, an additional 5% current reduction is added.

[0014] Secondly, this application provides an LED display module control system based on multi-point temperature monitoring, applied to an LED display screen composed of multiple LED display modules. The system includes: a data acquisition unit, which acquires node temperature signals from multiple LED display modules and obtains a multi-point real-time temperature set of the LED display screen after preprocessing; and a monitoring unit, which monitors the multi-point real-time temperature set of the LED display screen in real time and triggers multiple levels of protection based on preset multi-level protection thresholds, including: high temperature warning trigger and overheat protection trigger. If the multi-point real-time temperature set is within the threshold of the high temperature warning trigger, the output current of the LED driving circuit is dynamically adjusted according to the temperature deviation. If the multi-point real-time temperature set is within the threshold of the overheat protection trigger, an overheat protection signal is sent to the LED driving circuit to cut off the power supply of the target module.

[0015] The LED display module control method and system based on multi-point temperature monitoring provided in this application have the following advantages: By collecting node temperature signals from multiple LED display modules and preprocessing them, a multi-point real-time temperature set of the LED display screen is obtained; the multi-point real-time temperature set of the LED display screen is monitored in real time, and multi-level triggering is performed according to preset multi-level protection thresholds, including: high-temperature warning triggering and overheat protection triggering; if the multi-point real-time temperature set is within the threshold of the high-temperature warning triggering, the output current of the LED driver circuit is dynamically adjusted according to the temperature deviation; if the multi-point real-time temperature set is within the threshold of the overheat protection triggering, an overheat protection signal is sent to the LED driver circuit to cut off the power supply to the target module. Through full-node temperature acquisition, multi-level triggering, and precise current adjustment, the system solves the problems of temperature control blind spots, protection lag, and the conflict between display and safety in LED displays, covering core heat-generating nodes such as LED chips and power interfaces; multi-level protection precise triggering, with secondary thresholds combined with temperature change rate and link coordination status for multi-dimensional judgment, improves trigger accuracy and reduces false triggering rate; balances display effect and equipment safety, avoiding short-circuit fires caused by insulation melting due to high temperatures; and significantly improves the safety performance of the display screen. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a flowchart illustrating an LED display module control method based on multi-point temperature monitoring in one example; Figure 2 is a structural diagram illustrating an LED display module control system based on multi-point temperature monitoring in one example. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Referring to Figure 1, this embodiment provides a control method for LED display modules based on multi-point temperature monitoring, which is applied to an LED display screen composed of multiple LED display modules. The method includes the following steps: S101, collecting node temperature signals of multiple LED display modules, and obtaining a multi-point real-time temperature set of the LED display screen after preprocessing; In step S101, for the core heat-generating nodes of the LED display module, such as the surface of the LED chip, the pins of the driver IC, the bottom of the heat sink, and the power line interface, matching temperature sensors of corresponding accuracy, and collecting temperature data for the entire link.

[0020] S102. Real-time monitoring of the multi-point real-time temperature set of the LED display screen, and multi-level triggering based on preset multi-level protection thresholds, including: high temperature warning trigger and overheat protection trigger. In step S102, the existing technology only sets a single overheat cut-off threshold. If the threshold is set too high, it will trigger only after the insulation layer melts; if it is set too low, it will frequently cut off the power supply, affecting use. Using only a single point temperature as the triggering basis, it cannot identify hidden risks such as sudden temperature rises and chain-related overheating, resulting in missed triggers. Using a single module as the monitoring unit, it cannot detect the cascading overheating risks of the same power supply chain, which can easily lead to current imbalance. The multi-level protection threshold setting includes high temperature warning trigger and overheat protection trigger. The two-level thresholds cover the entire range from safe to dangerous, which not only avoids false triggers affecting the display, but also prevents missed triggers from causing hidden dangers.

[0021] S103. If the multi-point real-time temperature set is within the threshold for triggering a high-temperature warning, the output current of the LED driver circuit is dynamically adjusted according to the temperature deviation. In step S103, based on the deviation between the actual temperature and the safety threshold, a linear current reduction algorithm is adopted to control the temperature rise while keeping the brightness loss within an acceptable range for the human eye. When a link-level high-temperature warning is detected, the main control unit synchronously adjusts the current of all modules under the same power supply link. By balancing the current distribution within the link, excessively high current in some modules is avoided, which could exacerbate the temperature rise.

[0022] S104. If the multi-point real-time temperature set is within the threshold for overheat protection triggering, an overheat protection signal is sent to the LED driver circuit to cut off the power supply to the target module.

[0023] In step S104, the physical location of the module is associated with the unique identifier of the temperature node to accurately locate the overheated module. Only the power supply to the target module is cut off, without affecting the operation of other normal modules.

[0024] It should be noted that in this embodiment, multiple node temperature signals from LED display modules are collected and preprocessed to obtain a multi-point real-time temperature set for the LED display screen. This multi-point real-time temperature set is monitored in real time, and multi-level triggering is performed based on preset multi-level protection thresholds, including high-temperature warning triggering and overheat protection triggering. If the multi-point real-time temperature set is within the high-temperature warning triggering threshold, the output current of the LED driver circuit is dynamically adjusted according to the temperature deviation. If the multi-point real-time temperature set is within the overheat protection triggering threshold, an overheat protection signal is sent to the LED driver circuit to cut off the power supply to the target module. Through full-node temperature acquisition, multi-level triggering, and precise current adjustment, the system solves the problems of temperature control blind spots, protection lag, and the conflict between display and safety in LED displays, covering core heat-generating nodes such as LED chips and power interfaces. Multi-level protection with precise triggering, using a multi-dimensional judgment based on temperature change rate and link coordination status, improves trigger accuracy and reduces false triggering rate. It balances display effect and equipment safety, avoiding short-circuit fires caused by insulation melting due to high temperatures, and significantly improves the safety performance of the display screen.

[0025] Example 2: This example provides a further technical solution based on Example 1.

[0026] In this embodiment, the step of collecting node temperature signals from multiple LED display modules includes: setting at least one temperature monitoring node in each LED display module, wherein the node types of the temperature monitoring nodes include LED chip surface nodes, driver IC pin nodes, heat sink bottom nodes, and power line interface nodes; assigning a unique identifier to each temperature monitoring node, wherein the identifier corresponds to identification information, and the identification information includes the LED module number to which it belongs, node coordinates, and associated location tags, wherein the associated location tags are grouped and configured according to power supply links and signal links; collecting raw temperature signals through temperature sensors matched with the temperature monitoring nodes; calibrating the collected raw temperature signals after sequentially performing RC low-pass filtering to eliminate electromagnetic interference, thereby obtaining calibrated temperature signals; and storing the calibrated temperature signals, identifiers, and associated location tags of each temperature monitoring node in association to obtain a multi-point real-time temperature set.

[0027] It should be noted that monitoring points are set up for high-risk fire nodes such as LED chips, driver ICs, heat sinks, and power interfaces. High-precision data acquisition, matching with corresponding sensor types, and RC filtering and calibration processes are used to reduce temperature data errors and effectively avoid false triggering caused by electromagnetic interference. The module number and link tag are associated with a unique identification code, which facilitates the location of the source of the fault and improves the fire safety and stable operation of the LED display screen.

[0028] In this embodiment, the step of acquiring the raw temperature signal through a temperature sensor matched with the temperature monitoring node includes: acquiring the raw temperature signal through a thermistor connected to the surface node of the LED chip; acquiring the raw temperature signal through a built-in temperature sensor connected to the pin node of the driver IC; acquiring the raw temperature signal through a thermocouple connected to the bottom node of the heat sink; and acquiring the raw temperature signal through a surface-mount temperature acquisition chip connected to the power line interface node.

[0029] It should be noted that thermistors are selected for the LED chip surface nodes due to their fast response speed, enabling precise capture of sudden temperature rises in the chip junction. The driver IC pin nodes utilize built-in temperature sensors to meet the high-precision temperature monitoring requirements of the driver IC. The heatsink bottom nodes are matched with thermocouples, which can withstand high temperatures and effectively monitor overheating caused by abnormal heat conduction. The power line interface nodes use surface-mount acquisition chips, improving electromagnetic interference resistance and avoiding data fluctuations caused by power supply fluctuations. Through full-node temperature data error control, the false trigger rate is reduced, and the time for troubleshooting during maintenance is shortened.

[0030] In this embodiment, the step of assigning a unique identifier to each temperature monitoring node, wherein the identifier corresponds to identification information, and the identification information includes the LED module number to which it belongs, node coordinates, and associated location label, wherein the step of configuring the associated location label in groups according to power supply links and signal links includes: power supply links are divided according to power input branches, and all temperature monitoring nodes on the same power supply branch line are marked as the same power supply link; signal links are divided according to data transmission channels, and the temperature monitoring nodes on the same signal channel are marked with the same signal link label.

[0031] It should be noted that by dividing the power supply links according to the power input branches and binding temperature data to the power supply / signal links, the faulty link can be directly located when overheating occurs, improving operation and maintenance efficiency. By dividing the signal links according to the data transmission channels, temperature changes of the same power supply branch can be monitored synchronously based on the power supply link identifier, allowing for early identification of risks such as local overheating, current imbalance, and thermal runaway of the entire link.

[0032] In this embodiment, the real-time monitoring of the multi-point real-time temperature set of the LED display screen and the multi-level triggering based on preset multi-level protection thresholds, including the steps of high temperature warning triggering and overheat protection triggering, include: dividing the LED display screen into several independent monitoring units based on the associated location tags in the multi-point real-time temperature set, with each monitoring unit corresponding to a complete power supply link and signal link; the local controller of each LED module collects the temperature data of its respective node at a preset frequency; when the highest node temperature of the monitoring unit exceeds the high temperature warning trigger threshold, or when the temperature change rate of two or more nodes under the same associated location tag is greater than the second preset temperature change rate, the high temperature warning protection state is triggered; when the highest node temperature of the monitoring unit exceeds the overheat protection trigger threshold, or when three or more nodes in the same power supply link monitoring unit simultaneously exceed the preset overheat temperature, the overheat protection state is triggered.

[0033] It should be noted that independent monitoring units are divided according to power supply links and signal links. The local controller collects node data at high frequency, shortening the fault source location time and avoiding misjudgments caused by global monitoring. Through multi-level balance protection, overheat protection accurately cuts off faulty links, avoiding short circuit fires caused by insulation melting due to high temperature. This greatly improves the safety performance of the display screen and reduces the risk of thermal runaway. Through multi-node temperature change rate linkage judgment, the risks of local overheating, link imbalance and system-wide failure can be identified in advance, reducing the false trigger rate and extending the overall life of the equipment.

[0034] In this embodiment, the step of dynamically adjusting the output current of the LED driver circuit according to the temperature deviation if the multi-point real-time temperature set is within the threshold for triggering a high-temperature warning includes: based on the temperature data of the multi-point real-time temperature set, taking each LED display module as an independent monitoring unit, calculating the highest temperature T_max and the temperature change rate ΔT / Δt of all temperature monitoring nodes in the monitoring unit; when the highest temperature T_max is greater than a preset threshold and the temperature change rate is greater than a preset range, it is determined that the module is within the high-temperature warning trigger threshold; for scenarios where multiple modules under the same power supply link trigger warnings simultaneously, it is determined to be a link-level high-temperature warning; the main control unit synchronously executes current adjustment commands on all LED modules under the same power supply link to achieve balanced current distribution within the link.

[0035] It should be noted that the module's warning status is determined by the highest temperature and the rate of change. Combined with the power supply link association, the link-level high temperature risk is identified, reducing the false trigger rate and avoiding frequent current adjustment caused by local heat dissipation fluctuations. Modules under the same power supply link perform current adjustment synchronously. Through dynamic equalization of current distribution within the link, the temperature difference between modules within the link is controlled to avoid local overheating caused by power supply link current imbalance.

[0036] In this embodiment, the step of sending an overheat protection signal to the LED driver circuit to cut off the power supply to the target module if the multi-point real-time temperature set is within the threshold for overheat protection triggering includes: based on the structured data of the multi-point real-time temperature set, taking each LED display module as an independent monitoring unit, calculating the highest temperature T_max and temperature change rate ΔT / Δt of all temperature monitoring nodes in the monitoring unit; when the highest temperature of a single monitoring unit is greater than a preset threshold and the temperature change rate is greater than a preset range, it is determined to be a sudden overheating trigger protection; by matching the identification code of the temperature monitoring node with the corresponding physical location of the LED module, a single faulty module is determined, the main control unit sends an overheat protection command, and after receiving the command, the driver circuit cuts off the power supply to the target module.

[0037] It should be noted that matching the physical location of the module with the temperature node identification code shortens the fault location time and improves operation and maintenance efficiency. Cross-validation using the highest temperature and rate of change effectively avoids unnecessary downtime caused by ambient temperature fluctuations.

[0038] In this embodiment, the main control unit synchronously executes current adjustment commands on all LED modules under the same power supply link. After the step of balancing current distribution within the link, it also includes: when a link-level high temperature warning is determined, the main control unit synchronously executes current adjustment commands on all LED modules under the same power supply link to focus on monitoring the temperature of the power line interface node of the link. When the power line interface node approaches the highest temperature triggered by the high temperature warning, an additional 5% current reduction is added.

[0039] It should be noted that through the link-coordinated current regulation and interface temperature dynamic compensation mechanism, precise temperature control at the link level and synchronous current regulation of modules under the same power supply link ensure balanced current distribution within the link and avoid premature aging of modules caused by local overcurrent. In addition, the temperature of the power line interface node is monitored, and when it approaches the maximum temperature triggered by the warning, an additional 5% current reduction is added. Through the two-level current regulation strategy, accurate fault prediction is achieved and response efficiency is improved.

[0040] Example 3, referring to Figure 2, provides an LED display module control system based on multi-point temperature monitoring, applied to an LED display screen composed of multiple LED display modules. The system includes: a data acquisition unit 100, which acquires the node temperature signals of multiple LED display modules and obtains a multi-point real-time temperature set of the LED display screen after preprocessing; and a monitoring unit 200, which monitors the multi-point real-time temperature set of the LED display screen in real time and triggers it in multiple levels according to preset multi-level protection thresholds, including high-temperature warning trigger and overheat protection trigger. If the multi-point real-time temperature set is within the threshold of the high-temperature warning trigger, the output current of the LED driver circuit is dynamically adjusted according to the temperature deviation. If the multi-point real-time temperature set is within the threshold of the overheat protection trigger, an overheat protection signal is sent to the LED driver circuit to cut off the power supply of the target module.

[0041] The LED display module control system based on multi-point temperature monitoring provided in this embodiment has the following advantages: This embodiment acquires node temperature signals from multiple LED display modules, preprocesses them to obtain a multi-point real-time temperature set for the LED display screen; it monitors the multi-point real-time temperature set in real time and triggers multiple levels of protection based on preset multi-level protection thresholds, including high-temperature warning triggering and overheat protection triggering; if the multi-point real-time temperature set is within the high-temperature warning triggering threshold, the output current of the LED driver circuit is dynamically adjusted according to the temperature deviation; if the multi-point real-time temperature set is within the overheat protection triggering threshold, an overheat protection signal is sent to the LED driver circuit to cut off the power supply to the target module. Through full-node temperature acquisition, multi-level triggering, and precise current adjustment, it solves the problems of temperature control blind spots, protection lag, and the conflict between display and safety in LED displays, covering core heat-generating nodes such as LED chips and power interfaces; multi-level protection with precise triggering, combining secondary thresholds with temperature change rate and link coordination status for multi-dimensional judgment, improves trigger accuracy and reduces false triggering rate; it balances display effect and equipment safety, avoiding short-circuit fires caused by insulation melting due to high temperatures; and it significantly improves the safety performance of the display screen.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A control method for LED display modules based on multi-point temperature monitoring, applied to an LED display screen composed of multiple LED display modules, characterized in that, The steps include: collecting node temperature signals from multiple LED display modules, and obtaining a multi-point real-time temperature set of the LED display screen after preprocessing; The system monitors the multi-point real-time temperature set of the LED display screen in real time and triggers it in multiple levels according to the preset multi-level protection thresholds, including high temperature warning trigger and overheat protection trigger. If the multi-point real-time temperature set is within the threshold of the high temperature warning trigger, the output current of the LED driver circuit is dynamically adjusted according to the temperature deviation. If the multi-point real-time temperature set is within the threshold of the overheat protection trigger, an overheat protection signal is sent to the LED driver circuit to cut off the power supply of the target module.

2. The LED display module control method based on multi-point temperature monitoring according to claim 1, characterized in that, The step of collecting node temperature signals from multiple LED display modules includes: setting at least one temperature monitoring node in each LED display module, wherein the node types of the temperature monitoring nodes include LED chip surface nodes, driver IC pin nodes, heat sink bottom nodes, and power line interface nodes; assigning a unique identifier to each temperature monitoring node, wherein the identifier corresponds to identification information, and the identification information includes the LED module number to which it belongs, node coordinates, and associated location tags, wherein the associated location tags are grouped and configured according to power supply links and signal links; collecting raw temperature signals through temperature sensors matched with the temperature monitoring nodes; performing RC low-pass filtering to eliminate electromagnetic interference on the collected raw temperature signals in sequence, and then calibrating them to obtain calibrated temperature signals; associating and storing the calibrated temperature signals, identifiers, and associated location tags of each temperature monitoring node to obtain a multi-point real-time temperature set.

3. The LED display module control method based on multi-point temperature monitoring according to claim 2, characterized in that, The step of acquiring the raw temperature signal through a temperature sensor matched with the temperature monitoring node includes: acquiring the raw temperature signal through a thermistor connected to the surface node of the LED chip; acquiring the raw temperature signal through a built-in temperature sensor connected to the pin node of the driver IC; acquiring the raw temperature signal through a thermocouple connected to the bottom node of the heat sink; and acquiring the raw temperature signal through a surface-mount temperature acquisition chip connected to the power line interface node.

4. The LED display module control method based on multi-point temperature monitoring according to claim 2, characterized in that, The step of assigning a unique identifier to each temperature monitoring node, wherein the identifier corresponds to identification information, the identification information includes the LED module number to which it belongs, node coordinates and associated location label, wherein the associated location label is configured in groups according to power supply links and signal links, including: power supply links are divided according to power input branches, and all temperature monitoring nodes on the same power supply branch line are marked as the same power supply link; signal links are divided according to data transmission channels, and the temperature monitoring nodes on the same signal channel are marked with the same signal link label.

5. The LED display module control method based on multi-point temperature monitoring according to claim 2, characterized in that, The method involves real-time monitoring of the multi-point real-time temperature set of the LED display screen and multi-level triggering based on preset multi-level protection thresholds. These multi-level protection thresholds include steps for triggering high-temperature warnings and overheating protection. Specifically, the method involves dividing the LED display screen into several independent monitoring units based on associated location tags in the multi-point real-time temperature set. Each monitoring unit corresponds to a complete power supply link and signal link. The local controller of each LED module collects temperature data from its assigned node at a preset frequency. When the highest node temperature of a monitoring unit exceeds the high-temperature warning trigger threshold, or when the temperature change rate of two or more nodes under the same associated location tag exceeds a second preset temperature change rate, a high-temperature warning protection state is triggered. When the highest node temperature of a monitoring unit exceeds the overheating protection trigger threshold, or when three or more nodes within the same power supply link monitoring unit simultaneously exceed a preset overheating temperature, an overheating protection state is triggered.

6. The LED display module control method based on multi-point temperature monitoring according to claim 1, characterized in that, The step of dynamically adjusting the output current of the LED driver circuit based on the temperature deviation if the multi-point real-time temperature set is within the threshold for triggering a high-temperature warning includes: based on the temperature data of the multi-point real-time temperature set, taking each LED display module as an independent monitoring unit, calculating the highest temperature T_max and the temperature change rate ΔT / Δt of all temperature monitoring nodes within the monitoring unit; when the highest temperature T_max is greater than a preset threshold and the temperature change rate is greater than a preset range, it is determined that the module is within the high-temperature warning trigger threshold; for scenarios where multiple modules under the same power supply link trigger warnings simultaneously, it is determined to be a link-level high-temperature warning; the main control unit synchronously executes current adjustment commands on all LED modules under the same power supply link to achieve balanced current distribution within the link.

7. The LED display module control method based on multi-point temperature monitoring according to claim 1, characterized in that, The step of sending an overheat protection signal to the LED driver circuit to cut off the power supply to the target module if the multi-point real-time temperature set is within the threshold for overheat protection triggering includes: based on the structured data of the multi-point real-time temperature set, taking each LED display module as an independent monitoring unit, calculating the highest temperature T_max and temperature change rate ΔT / Δt of all temperature monitoring nodes in the monitoring unit; when the highest temperature of a single monitoring unit is greater than a preset threshold and the temperature change rate is greater than a preset range, it is determined to be a sudden overheating trigger protection; matching the physical location of the corresponding LED module through the identification code of the temperature monitoring node to determine a single faulty module; the main control unit sends an overheat protection command; after receiving the command, the driver circuit cuts off the power supply to the target module.

8. The LED display module control method based on multi-point temperature monitoring according to claim 6, characterized in that, The main control unit synchronously executes current adjustment commands on all LED modules under the same power supply link. After the current distribution balancing step within the link, it also includes: when a link-level high temperature warning is determined, the main control unit synchronously executes current adjustment commands on all LED modules under the same power supply link to focus on monitoring the temperature of the power line interface node of the link. When the power line interface node approaches the highest temperature triggered by the high temperature warning, an additional 5% current reduction is added.

9. A control system for LED display modules based on multi-point temperature monitoring, applied to an LED display screen composed of multiple LED display modules, characterized in that, A method for controlling an LED display module based on multi-point temperature monitoring according to any one of claims 1 to 8, the system comprising: a data acquisition unit for acquiring node temperature signals of multiple LED display modules and obtaining a multi-point real-time temperature set of the LED display screen after preprocessing; a monitoring unit for real-time monitoring of the multi-point real-time temperature set of the LED display screen and triggering multiple levels of protection based on preset multi-level protection thresholds, the multi-level protection thresholds including: high temperature warning trigger and overheat protection trigger; if the multi-point real-time temperature set is within the threshold of the high temperature warning trigger, the output current of the LED driving circuit is dynamically adjusted according to the temperature deviation; if the multi-point real-time temperature set is within the threshold of the overheat protection trigger, an overheat protection signal is sent to the LED driving circuit to cut off the power supply of the target module.

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