Method and system for prolonging average fault-free time of LED display screen lamp beads

Abstract

The invention relates to the technical field of LED display screen manufacturing, in particular to an LED display screen lamp bead average fault-free time prolonging method and system. The method comprises the following steps: acquiring the real-time working temperature of an LED lamp bead through multi-source data acquisition, and constructing a temperature data set; monitoring is carried out based on a preset temperature threshold value, and LED lamp beads with abnormal temperature and point locations thereof are marked; the driving current of the LED lamp beads with the abnormal temperature is reduced according to a preset current proportion, and based on the luminous flux conservation principle, the driving current of the first-stage adjacent lamp beads is improved for luminous flux compensation; if the adjusted temperature still exceeds the threshold value, the range of the adjacent lamp bead ring layers is expanded outwards step by step for luminous flux compensation until the temperature of the LED lamp beads is abnormal, and the temperature is reduced to be lower than the threshold value. Through temperature monitoring and dynamic current adjustment, the working temperature of the lamp beads with abnormal temperature is reduced while the display effect is maintained, the average fault-free time of the LED lamp beads is effectively prolonged, the reliability of the LED display screen is improved, and the service life of the LED display screen is prolonged.

Description

Technical Field

[0001] This invention relates to the field of LED display manufacturing technology, and in particular to a method and system for extending the mean time between failures (MTBF) of LED display chips. Background Technology

[0002] With the continuous development of LED display technology, LED displays have been widely used in advertising media, stage performances, stadiums, command centers, and many other fields. As a high-brightness, high-contrast, and high-definition display device, the reliability of its core component, the LED chips, directly affects the lifespan and display effect of the entire display system. LED displays are also widely used in new power systems. Currently, the mainstream LED pixel structure uses an organic material layer sandwiched between the anode and cathode, achieving light emission through carrier injection and recombination. However, its light-emitting units (LED chips) generally face reliability issues such as efficiency degradation (e.g., decreased brightness, color shift) and increased dark spots during long-term operation, directly leading to a lower MTBF than theoretically expected.

[0003] Currently, the mean time between failures (MTBF) of LED display chips is an important indicator for measuring their reliability. However, in practical applications, LED chips often experience problems such as efficiency degradation, brightness reduction, and color deviation due to excessively high temperatures caused by long-term operation. Ultimately, this leads to malfunctions such as dark spots and dead LEDs on the display screen, seriously affecting the display effect and lifespan.

[0004] In existing technologies, various methods have been attempted to address the reliability issues of LED chips. For example, CN117388663B discloses an LED strip processing and inspection method and system based on multi-source data analysis. This method constructs a real-time model of the LED strip to assess its physical state, detect luminous flux, and perform time delay testing, and repairs abnormal LED chips. While this method primarily targets the LED strip processing and inspection process and can identify and repair some problems during production, it lacks an effective real-time monitoring and adjustment mechanism for abnormal temperature issues occurring in installed LED displays.

[0005] CN107610641B discloses an intelligent device and method for automatic calibration of LED displays. The method uses an MCU to calculate and store calibration coefficients, and a CPLD performs multiplication operations to multiply the calibration coefficients by the current display parameters to form the calibrated display parameters. This method primarily corrects the brightness and color consistency of LED displays, but does not address handling strategies for abnormal temperature conditions.

[0006] In summary, existing technologies have the following shortcomings: 1) Most existing methods focus on the brightness and color consistency correction of LED chips, paying insufficient attention to the shortened lifespan caused by abnormal temperatures; 2) While some methods consider temperature factors, the control strategies are relatively simple, only reducing the driving current to lower the temperature without considering the impact on display performance; 3) There is a lack of a coordinated control strategy based on the principle of luminous flux conservation, making it impossible to effectively extend the lifespan of LED chips with abnormal temperatures while ensuring display performance; 4) Existing methods are mostly static adjustments, lacking a dynamic feedback iteration mechanism, making it difficult to cope with temperature changes in LED displays under different operating environments. Therefore, there is an urgent need for a method that can monitor LED chip temperature in real time and perform coordinated control based on the principle of luminous flux conservation, effectively extending the mean time between failures (MTBF) of LED chips without significantly affecting display performance. Summary of the Invention

[0007] To solve the above-mentioned technical problems, this invention proposes a method for extending the mean time between failures (MTBF) of LED display chips, comprising the following steps: S1. By acquiring multi-source data, obtain the real-time operating temperature of each LED bead in the target LED display screen and construct an LED bead operating temperature dataset; S2. Based on the LED operating temperature dataset and the pre-set LED bead temperature threshold, monitor the temperature of each LED display bead, mark LED beads whose real-time operating temperature exceeds the temperature threshold as abnormal LED beads, and obtain the location of abnormal LED beads. S3. Based on the location of the LED beads with abnormal temperature, reduce the driving current of the LED beads with abnormal temperature according to the preset current ratio, and based on the principle of luminous flux conservation, increase the driving current of the first-level adjacent LED beads of the LED beads with abnormal temperature as the center to compensate for luminous flux. S4. Obtain the real-time operating temperature of the LED bead with abnormal temperature after current adjustment and monitor the temperature. If the real-time operating temperature of the LED bead with abnormal temperature after current adjustment exceeds the temperature threshold, expand the range of adjacent LED beads outward from the LED bead with abnormal temperature as the center, and perform luminous flux compensation on the expanded adjacent LED bead layers based on the principle of luminous flux conservation until the temperature of the LED bead with abnormal temperature is lower than the temperature threshold, thus completing the extension of the mean time between failures (MTBF) of the LED bead with abnormal temperature.

[0008] Furthermore, in step S1, multi-source data is acquired through the temperature sensing layer to obtain the real-time operating temperature of each LED bead in the target LED display screen. The temperature sensing layer includes a thin-film thermocouple, a thin-film thermistor, and a diode temperature sensor.

[0009] Furthermore, step S3 includes reducing the driving current of the LED beads with abnormal temperature according to a preset current ratio, thereby reducing the luminous flux of the LED beads with abnormal temperature. ,in To adjust the coefficient, and taking the LED bead with abnormal temperature as the center, its first... The driving current of LED beads in the adjacent area of ​​the layer is increased to compensate for luminous flux.

[0010] Furthermore, in step S4, if the real-time operating temperature of the LED bead point with abnormal temperature after current adjustment exceeds the temperature threshold, the range of LED beads participating in compensation will be expanded outward to the [missing information - likely a specific number]. In adjacent areas of the layers, the luminous flux of LED beads decreases due to abnormal temperatures. Unchanged, the first The driving current of all LEDs in the adjacent area of ​​the layer that undergo luminous flux compensation is increased to perform luminous flux compensation. The luminous flux compensation calculation formula is expressed as: ; ; in, This represents the luminous flux compensation value. This indicates the number of layers extending outwards from the target LED bead, and It is an integer. This is for adjusting the coefficient.

[0011] The present invention also provides a system for extending the mean time between failures (MTBF) of LED display chips, which is implemented based on the method for extending the MTBF of LED display chips described in any one of the above-mentioned methods, and includes: The multi-source data acquisition module is used to acquire the real-time operating temperature of each LED bead in the target LED display screen through multi-source data acquisition, and to build an LED bead operating temperature dataset. The temperature monitoring module is used to monitor the temperature of each LED display LED based on the LED operating temperature dataset and a pre-set LED LED temperature threshold. It marks LEDs whose real-time operating temperature exceeds the temperature threshold as abnormal LEDs and identifies the locations of these abnormal LEDs. The collaborative control and compensation module is used to reduce the driving current of the LED beads with abnormal temperature according to a preset current ratio based on the location of the LED beads with abnormal temperature, and to increase the driving current of the first-level adjacent LED beads with abnormal temperature as the center based on the principle of luminous flux conservation to perform luminous flux compensation. The dynamic feedback iteration module is used to obtain and monitor the real-time operating temperature of the LED bead with abnormal temperature after current adjustment. If the real-time operating temperature of the LED bead with abnormal temperature after current adjustment exceeds the temperature threshold, the module expands the range of adjacent LED beads outward from the LED bead with abnormal temperature as the center, and performs luminous flux compensation on the expanded adjacent LED bead layers based on the principle of luminous flux conservation, until the temperature of the LED bead with abnormal temperature is lower than the temperature threshold, thus extending the mean time between failures (MTBF) of the LED bead with abnormal temperature.

[0012] The beneficial effects of this invention are as follows: by adding a temperature sensing layer to the LED beads, accurate real-time monitoring of the LED beads' operating temperature is achieved; by intelligently regulating the driving current of LED beads with abnormal temperatures, their operating temperature is reduced; and based on the principle of luminous flux conservation, luminous flux compensation of adjacent LED beads ensures that the overall display effect is not affected; through a dynamic feedback iteration mechanism, the compensation range is gradually expanded according to the temperature monitoring results to ensure that the operating temperature of LED beads with abnormal temperatures drops below the safe threshold. Compared with the prior art, this invention effectively extends the mean time between failures (MTBF) of LED display beads without significantly increasing manufacturing costs or sacrificing display performance, solving the problems of high cost, insignificant improvement effect, and sacrifice of display performance in the prior art. Attached Figure Description

[0013] Figure 1 This is a flowchart illustrating a method for extending the mean time between failures (MTBF) of LED display chips according to an embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the LED display lamp bead base temperature sensing layer structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the area adjacent to the LED lamp bead with abnormal temperature according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the temperature and current control logic according to an embodiment of the present invention; Figure 5 This is a functional architecture diagram of an LED display screen lamp bead mean time between failures (MTBF) extension system according to an embodiment of the present invention. Detailed Implementation

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention; that is, the described embodiments are only a part of the embodiments of the invention, and not all of them. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0018] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or machine that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or machine. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or machine that includes said element.

[0019] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0020] Example 1: like Figure 1 As shown, Embodiment 1 of the present invention provides a method for extending the mean time between failures (MTBF) of LED display chips, comprising the following steps: S1. By acquiring multi-source data, obtain the real-time operating temperature of each LED bead in the target LED display screen and construct an LED bead operating temperature dataset; S2. Based on the LED operating temperature dataset and the pre-set LED bead temperature threshold, monitor the temperature of each LED display bead, mark LED beads whose real-time operating temperature exceeds the temperature threshold as abnormal LED beads, and obtain the location of abnormal LED beads. S3. Based on the location of the LED beads with abnormal temperature, reduce the driving current of the LED beads with abnormal temperature according to the preset current ratio, and based on the principle of luminous flux conservation, increase the driving current of the first-level adjacent LED beads of the LED beads with abnormal temperature as the center to compensate for luminous flux. S4. Obtain the real-time operating temperature of the LED bead with abnormal temperature after current adjustment and monitor the temperature. If the real-time operating temperature of the LED bead with abnormal temperature after current adjustment exceeds the temperature threshold, expand the range of adjacent LED beads outward from the LED bead with abnormal temperature as the center, and perform luminous flux compensation on the expanded adjacent LED bead layers based on the principle of luminous flux conservation until the temperature of the LED bead with abnormal temperature is lower than the temperature threshold, thus completing the extension of the mean time between failures (MTBF) of the LED bead with abnormal temperature.

[0021] Furthermore, in step S1, multi-source data is acquired through the temperature sensing layer to obtain the real-time operating temperature of each LED bead in the target LED display screen. The temperature sensing layer includes a thin-film thermocouple, a thin-film thermistor, and a diode temperature sensor.

[0022] Furthermore, step S3 includes reducing the driving current of the LED bead with abnormal temperature according to a preset current ratio, thereby reducing the luminous output of the LED bead with abnormal temperature. ,in To adjust the coefficient, and taking the LED bead with abnormal temperature as the center, its first... The driving current of LED beads in the adjacent area of ​​the layer is increased to compensate for luminous flux.

[0023] Furthermore, in step S4, if the real-time operating temperature of the LED bead point with abnormal temperature after current adjustment exceeds the temperature threshold, the range of LED beads participating in compensation will be expanded outward to the [missing information - likely a specific number]. In adjacent areas of the layers, the luminous output of LED beads decreases due to abnormal temperatures. Unchanged, the first The driving current of all LEDs in the adjacent area of ​​the layer that undergo luminous flux compensation is increased to perform luminous flux compensation. The luminous flux compensation calculation formula is expressed as: ; ;in, This represents the luminous flux compensation value. This indicates the number of layers extending outwards from the target LED bead, and It is an integer. This is for adjusting the coefficient.

[0024] Specifically, the implementation principle and flow of each sub-step in the above embodiments are as follows: like Figure 2 As shown, a temperature sensing layer is first added under the pixel layer of the LED bead base of the target LED display. Specifically, thin-film thermocouples, thin-film thermistors, diode temperature sensors, etc. can be used to collect real-time temperature data of the LED beads at the pixel level. The temperature sensing layer is then electrically connected to the PCB so that the temperature signal of the LED beads can be transmitted to the overall control system of the LED display. like Figure 3 As shown, the whole machine control system then determines the LED beads whose temperature rise exceeds the threshold. In order to prevent the LED beads from malfunctioning and being damaged in advance, the current is reduced by electrical control to reduce the light emission, and the light emission of adjacent LED beads is appropriately increased to ensure the display effect.

[0025] like Figure 4 As shown, specifically: When the LED display screen's overall control system determines ( n, n When the real-time temperature data of the LED at a given point exceeds the temperature threshold, the entire control system will adjust the temperature downwards. n, n Point LED beads The driving current of the LED chip is reduced by approximately [amount missing]. The amount of light emitted, of which To adjust the coefficient; without exceeding the rated drive current of each LED, increase the value of the nearby LEDs ( n±i,n±i () i=1） Point LED beads The drive current (the drive current of adjacent LED chips is generally quite similar), thereby reducing the drive current of nearby LED chips by approximately The amount of light emitted is compensated by the eight nearby LED beads together. n, n The number of LED beads at each position decreased by approximately Adjust the luminescence intensity; wait for a certain cooling time after adjustment. t ,like( n, n If the real-time temperature data of the LED at the specified point is less than or equal to the temperature threshold, then the temperature-current control ends; if ( n, n If the real-time temperature data of the LED at the specified point is still greater than the temperature threshold, repeat the above steps and expand the adjustment range to ( ). n±i,n±i () i=2） Point-position LED beads, the drive current of nearby LED beads is increased to become Each time the adjustment range of the LED beads is repeated, it is expanded outward by one circle until ( n, n Point LED beads T n, n ≤ T limit ,in, T n,n for( n, n The temperature of the LED beads at the designated location; T limit The temperature threshold of the LED chip; K The adjustment coefficient affects the smoothness of brightness adjustment; when the adjustment range of the LED beads is expanded to ( n±i,n±i When at point ), ( n±i,n±i The formula for calculating the increase in driving current for nearby LEDs within a given location is as follows: ,in, This represents the luminous flux compensation value. This indicates the number of layers extending outwards from the target LED. This is the adjustment factor; that is... i=1 At that time 、i=2 At that time 、i=3 At that time 、i=4 At that time To prevent the affected LED beads from covering an excessively large area, it is recommended that... i≤4 ; t This refers to the cooling time after each adjustment. In this way, the MTBF of the LED display chips can be successfully extended while maintaining display quality.

[0026] Example 2

[0027] See Figure 5 Based on Embodiment 1, Embodiment 2 of the present invention proposes a system for extending the mean time between failures (MTBF) of LED display chips based on a method for extending the MTBF of LED display chips, comprising: The multi-source data acquisition module is used to acquire the real-time operating temperature of each LED bead in the target LED display screen through multi-source data acquisition, and to build an LED bead operating temperature dataset. Specifically, by acquiring multi-source data, the real-time operating temperature of each LED bead within the target LED display screen is obtained, constructing an LED bead operating temperature dataset. This module achieves pixel-level temperature sensing of the LED beads by setting a temperature sensing layer below the pixel layer of the LED bead base. The temperature sensing layer includes thin-film thermocouples, thin-film thermistors, diode temperature sensors, etc., and is electrically connected to the PCB to transmit the temperature signal of the LED beads to the overall control system of the display screen.

[0028] The temperature monitoring module is used to monitor the temperature of each LED display LED based on the LED operating temperature dataset and a pre-set LED LED temperature threshold. It marks LEDs whose real-time operating temperature exceeds the temperature threshold as abnormal LEDs and identifies the locations of these abnormal LEDs. Specifically, based on the LED operating temperature dataset and pre-set LED bead temperature thresholds, the module monitors the temperature of each LED bead in the LED display screen. LED beads whose real-time operating temperature exceeds the threshold are marked as temperature-abnormal LED beads, and their locations are identified. This module uses the overall control system to determine which LED beads have exceeded the temperature threshold, providing a basis for subsequent current adjustments.

[0029] The collaborative control and compensation module is used to reduce the driving current of the LED beads with abnormal temperature according to a preset current ratio based on the location of the LED beads with abnormal temperature, and to increase the driving current of the first-level adjacent LED beads with abnormal temperature as the center based on the principle of luminous flux conservation to perform luminous flux compensation. Specifically, based on the location of the LED beads exhibiting temperature abnormalities, the driving current of these LED beads is reduced according to a preset current ratio. Furthermore, based on the principle of luminous flux conservation, the driving current of the first-level adjacent LED beads is increased, centered on the location of the LED bead exhibiting the temperature abnormality, to compensate for the luminous flux. This module reduces the driving current of the LED beads exhibiting temperature abnormalities, thereby decreasing their luminous output. ,in To adjust the coefficients, and taking the LED bead location with temperature anomalies as the center, the driving current of the LED beads in the adjacent area of ​​the i-th layer is increased to compensate for the luminous flux, where i is an integer greater than 1, until the luminous flux of the LED beads in the adjacent area of ​​the i-th layer increases. .

[0030] The dynamic feedback iteration module is used to obtain the real-time operating temperature of the LED bead with abnormal temperature after current adjustment and to monitor the temperature. If the real-time operating temperature of the LED bead with abnormal temperature after current adjustment exceeds the temperature threshold, the module expands the range of adjacent LED beads outward from the LED bead with abnormal temperature as the center, and performs luminous flux compensation on the expanded adjacent LED bead layers based on the principle of luminous flux conservation until the temperature of the LED bead with abnormal temperature is lower than the temperature threshold, thus extending the mean time between failures of the LED bead with abnormal temperature. Specifically, the module acquires and monitors the real-time operating temperature of the LED bead with temperature anomalies after current adjustment. If the real-time operating temperature of the LED bead with temperature anomalies exceeds a temperature threshold, the module expands the range of adjacent LED bead layers outward from the LED bead with temperature anomalies as the center. Based on the principle of luminous flux conservation, luminous flux compensation is performed on the expanded adjacent LED bead layers until the temperature of the LED bead with temperature anomalies falls below the temperature threshold, thus extending the mean time between failures (MTBF) of the LED bead with temperature anomalies. This module expands the range of LED bead layers involved in compensation outward to the (i+1)th adjacent layer, maintaining a reduced luminous output of the LED bead with temperature anomalies. Without changing the current, increase the driving current of all LEDs in the adjacent area of ​​layer i+1 that are undergoing luminous flux compensation to perform luminous flux compensation. The luminous flux compensation calculation formula is expressed as: ; Where ΔL represents the luminous flux compensation value, i represents the number of outward expansion layers centered on the target LED, and K is the adjustment coefficient.

[0031] Through system integration, the aforementioned modules successfully extended the mean time between failures (MTBF) of LED chips while maintaining display quality. This system effectively identifies LED chips with abnormal temperatures, intelligently adjusts the drive current, and compensates for luminous flux, ensuring unaffected display performance while extending the lifespan of the LED chips.

[0032] This invention is described from the perspectives of its intended use, effectiveness, progress, and novelty. Its design has clear practical and progressive advantages, and it meets the functional enhancement and use requirements emphasized by the Patent Law. The above description and drawings are only preferred embodiments of this application and are not intended to limit this application. Therefore, all structures, devices, features, etc. that are similar to or identical to those of this application, i.e., all equivalent substitutions or modifications made in accordance with the scope of this patent application, shall fall within the scope of protection of this patent application.

[0033] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for extending the mean time between failures of LED display screen lamp beads, characterized in that, The method comprises the following steps: S1. Through multi-source data acquisition, the real-time working temperature of each LED lamp bead in the target LED display screen is obtained, and an LED lamp bead working temperature dataset is constructed; S2. According to the LED working temperature dataset, temperature monitoring is performed on each LED display screen lamp bead based on a pre-set LED lamp bead temperature threshold value, the LED lamp bead with a real-time working temperature exceeding the temperature threshold value is marked as a temperature abnormal LED lamp bead, and a temperature abnormal LED lamp bead point is obtained; S3. According to the temperature abnormal LED lamp bead point, the driving current of the temperature abnormal LED lamp bead is reduced according to a preset current proportion, and based on the principle of light flux conservation, the driving current of the first level of adjacent lamp beads of the temperature abnormal LED lamp bead point is increased for light flux compensation; S4. The real-time working temperature of the temperature abnormal LED lamp bead point after current adjustment is obtained and temperature monitoring is performed, if the real-time working temperature of the temperature abnormal LED lamp bead point after current adjustment exceeds the temperature threshold value, the range of the adjacent lamp bead circle layer is expanded outward level by level with the temperature abnormal LED lamp bead point as the center, and based on the principle of light flux conservation, the light flux compensation is performed on the expanded adjacent lamp bead level until the temperature of the temperature abnormal LED lamp bead is lower than the temperature threshold value, and the mean time between failures of the temperature abnormal LED lamp bead is extended. 2.The method of claim 1, wherein, In step S1, the real-time working temperature of each LED lamp bead in the target LED display screen is obtained through multi-source data acquisition by a temperature sensing layer, and the temperature sensing layer comprises a thin film thermocouple, a thin film thermistor and a diode temperature sensor. 3.The method of claim 1, wherein, Step S3 includes adjusting the driving current of the temperature abnormal LED lamp bead according to a preset current ratio to reduce the luminous flux of the temperature abnormal LED lamp bead wherein is an adjustment coefficient, and the first layer adjacent area of the LED lamp bead is adjusted to increase the driving current for luminous flux compensation.

4. The method of claim 3, wherein the method further comprises: In step S4, if the real-time operating temperature of the temperature abnormal LED lamp bead point after current adjustment exceeds the temperature threshold, the range of LED lamp beads participating in compensation is expanded to the first adjacent area of the layer, and the light flux of the temperature abnormal LED lamp bead is reduced unchanged, the driving current of all LED lamp beads in the first adjacent area of the layer for light flux compensation is increased for light flux compensation, and the light flux compensation calculation formula is represented as: ； ； wherein, represents a light flux compensation value, represents a number of layers extending outwardly from the target lamp bead, and is an integer, is an adjustment coefficient.

5. A system for prolonging the mean time between failures of LED display screen lamp beads, which is based on the method for prolonging the mean time between failures of LED display screen lamp beads according to any one of claims 1-4, characterized in that, It comprises: A multi-source data acquisition module is configured to obtain the real-time working temperature of each LED lamp bead in the target LED display screen through multi-source data acquisition, and construct an LED lamp bead working temperature dataset; A temperature monitoring module is configured to perform temperature monitoring on each LED display screen lamp bead based on a pre-set LED lamp bead temperature threshold value according to the LED working temperature dataset, mark the LED lamp bead with a real-time working temperature exceeding the temperature threshold value as a temperature abnormal LED lamp bead, and obtain a temperature abnormal LED lamp bead point; A cooperative control and compensation module is configured to reduce the driving current of the temperature abnormal LED lamp bead according to a preset current proportion according to the temperature abnormal LED lamp bead point, and based on the principle of light flux conservation, increase the driving current of the first level of adjacent lamp beads of the temperature abnormal LED lamp bead point for light flux compensation; A dynamic feedback iteration module is configured to obtain the real-time working temperature of the temperature abnormal LED lamp bead point after current adjustment and perform temperature monitoring, if the real-time working temperature of the temperature abnormal LED lamp bead point after current adjustment exceeds the temperature threshold value, expand the range of the adjacent lamp bead circle layer outward level by level with the temperature abnormal LED lamp bead point as the center, and based on the principle of light flux conservation, perform light flux compensation on the expanded adjacent lamp bead level until the temperature of the temperature abnormal LED lamp bead is lower than the temperature threshold value, and extend the mean time between failures of the temperature abnormal LED lamp bead.

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