LED fan screen, heat dissipation control method and display device

Abstract

The invention relates to the technical field of LED display, in particular to an LED fan screen, a heat dissipation control method and a display device, and aims to solve the technical problems of how to accurately obtain the overall working temperature of the LED fan screen and how to automatically adjust the rotating speed of the LED fan screen based on the overall working temperature. In order to achieve the purpose, according to the technical scheme, the method comprises the steps that the working temperature of each position is obtained through temperature sensors arranged in a plurality of heating areas, the overall working temperature of the LED fan screen is obtained based on the temperature influence weight of each heating area, and the rotating speed of the LED fan screen is controlled according to the overall working temperature. Through real-time temperature monitoring and intelligent heat dissipation control of main heating devices of the LED fan screen, the consistency of display colors and the uniformity of brightness of the LED fan screen can be improved, the service life of a core device is effectively prolonged, and meanwhile balance between heat dissipation and energy saving can be achieved.

Description

Technical Field

[0001] This application relates to the field of LED display technology, specifically to an LED fan screen, a heat dissipation control method, and a display device. Background Technology

[0002] LED fan screens are displays that rotate at a specific speed by an LED display component driven by a motor, based on the principle of visual persistence. They resemble fans and feature high brightness, wide color gamut, the ability to present 3D holographic display effects, and high cost-effectiveness. They are widely used in many scenarios such as offline retail, museums, product launches, virtual speeches, and parks and scenic spots.

[0003] LED fan screens primarily dissipate heat through air convection during the rotation of the blades (LED display modules). However, existing heat dissipation solutions for LED fan screens typically suffer from the following drawbacks: they rely solely on air convection, neglecting the heat generated by components in the drive and control circuits; their rotation speed is either not adjustable or has limited adjustable levels, making them unsuitable for prolonged operation in high-temperature environments; and they cannot automatically and intelligently adjust the fan speed based on changes in the actual operating temperature. Therefore, accurately obtaining the overall operating temperature of the LED fan screen and automatically adjusting its speed based on this temperature through improvements to the heat dissipation structure and control methods has become a pressing issue.

[0004] Accordingly, there is a need in the field for a new heat dissipation technology solution for LED fan screens to address the above-mentioned problems. Summary of the Invention

[0005] In order to overcome the above-mentioned deficiencies, this application is made to solve, or at least partially solve, the technical problem of how to accurately obtain the overall operating temperature of an LED fan screen and automatically adjust the rotation speed of the LED fan screen based on the overall operating temperature.

[0006] In a first aspect, an LED fan screen is provided, comprising: Multiple temperature sensors are respectively set near multiple heat-generating devices of the LED fan screen to collect the temperature values ​​of the corresponding heat-generating devices; The MCU chip obtains a comprehensive temperature value based on multiple acquired temperature values, and controls the rotation speed of the LED fan screen based on the comprehensive temperature value and a preset temperature range.

[0007] In one technical solution of the aforementioned LED fan screen, the LED fan screen further includes: A fan display module includes multiple blades, each blade including an LED bead, an LED driver chip and a PCB board, wherein the LED bead is disposed on a first surface of the PCB board and the LED driver chip is disposed on a second surface of the PCB board; The main control board includes an FPGA chip and the MCU chip; Motor control board, including motor control chip; The heating element includes the LED beads, the LED driver chip, the FPGA chip, and the motor control chip.

[0008] In one technical solution of the aforementioned LED fan screen, the temperature sensor includes a first temperature sensor and a second temperature sensor, wherein: The first temperature sensor is disposed on the first surface of at least one of the blades, at a position approximately one-third of the blade length away from the center of the fan display module, and is used to obtain the first operating temperature of the first heating area corresponding to the LED bead. The second temperature sensor is disposed on the second surface of at least one of the blades, at a position approximately half the length of the blade from the center of the fan display module, and is used to obtain the second operating temperature of the second heating area corresponding to the LED driver chip.

[0009] In one technical solution of the aforementioned LED fan screen, the temperature sensor further includes a third temperature sensor and a fourth temperature sensor, wherein: The third temperature sensor is used to obtain the third operating temperature of the third heating area corresponding to the FPGA chip. The fourth temperature sensor is used to obtain the fourth operating temperature of the fourth heating area corresponding to the motor control chip.

[0010] In one of the above-mentioned technical solutions for the LED fan screen, the LED fan screen further includes a metal impeller with heat dissipation fins.

[0011] In one technical solution of the aforementioned LED fan screen, the LED fan screen further includes: A heat pipe is thermally connected to at least one of the LED driver chip, the FPGA chip, and the MCU chip, and the heat pipe is connected to the metal impeller.

[0012] In one of the above-mentioned technical solutions for the LED fan screen, the LED fan screen is characterized in that it further includes a metal motor compartment with heat dissipation fins.

[0013] In one technical solution of the aforementioned LED fan screen, the MCU chip is configured as follows: The comprehensive temperature value is obtained based on the preset temperature influence weights of each heating zone; Wherein, the first temperature influence weight corresponding to the first heating area is greater than the second temperature influence weight corresponding to the second heating area; The second temperature influence weight is greater than the third temperature influence weight corresponding to the third heating region; The weight of the third temperature influence is greater than the weight of the fourth temperature influence corresponding to the fourth heating region.

[0014] In one technical solution of the aforementioned LED fan screen, the LED fan screen further includes a motor, and the MCU chip is configured as follows: Based on the comprehensive temperature value, the motor speed is controlled according to the preset temperature range and the corresponding relationship between the LED fan screen speed.

[0015] In a second aspect, a heat dissipation control method for an LED fan screen is provided, applicable to the LED fan screen described in any of the above technical solutions, the method comprising: Obtain the operating temperature of each heating zone; Based on the working temperature of each heating zone, and according to the preset temperature influence weight of each heating zone, a comprehensive temperature value is obtained; Based on the comprehensive temperature value, the rotation speed of the LED fan screen is controlled according to the preset temperature range and the corresponding relationship between the LED fan screen rotation speed.

[0016] In one technical solution of the above-mentioned heat dissipation control method, the method further includes: The first operating temperature of the first heating area corresponding to the LED bead is obtained by the first temperature sensor. The second operating temperature of the second heating area corresponding to the LED driver chip is obtained by the second temperature sensor. The third operating temperature of the third heat-generating area corresponding to the FPGA chip is obtained by using a third temperature sensor. The fourth operating temperature of the fourth heating area corresponding to the motor control chip is obtained through the fourth temperature sensor; The temperature influence weights include: The weight of the first temperature corresponding to the first heating area; The weight of the second temperature corresponding to the second heating area; The third temperature influence weight corresponding to the third heating area; The fourth temperature influence weight corresponding to the fourth heating region; Wherein, the weight of the first temperature influence is greater than the weight of the second temperature influence, the weight of the second temperature influence is greater than the weight of the third temperature influence, and the weight of the third temperature influence is greater than the weight of the fourth temperature influence.

[0017] In a third aspect, a display device is provided, the display device comprising the LED fan screen described in any of the above technical solutions.

[0018] The above-mentioned technical solutions of this application have at least one or more of the following beneficial effects: by setting temperature sensors in multiple heat-generating areas, the working temperature of each location is obtained, and a comprehensive temperature value is obtained based on the temperature influence weight of each heat-generating area. The rotation speed of the LED fan screen is controlled according to the comprehensive temperature value, thereby realizing real-time monitoring and intelligent heat dissipation control of the main heat-generating components of the LED fan screen, thereby improving the consistency of the LED fan screen display color and the uniformity of brightness, and effectively extending the service life of the core components; at the same time, it can also achieve a balance between heat dissipation and energy saving. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of an LED fan screen according to an embodiment of this application.

[0020] Figure 2 (a) is a schematic diagram of the first surface composition of a fan display module according to an embodiment of this application. Figure 2 (b) is a schematic diagram of the second surface composition of a fan display module according to an embodiment of the present application.

[0021] Figure 3 This is a flowchart of the main steps of a heat dissipation control method for an LED fan screen according to an embodiment of this application. Detailed Implementation

[0022] Some embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application.

[0023] It should be noted that in the description of this application, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device, structure, or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] First read Figure 1 , Figure 1 This is a schematic diagram of an LED fan screen structure according to an embodiment of this application. Figure 1As shown, the LED fan screen includes: a fan display module 110, a main control board 120, a metal impeller 130, a motor 140, a metal motor housing 150, a motor control board 160, and multiple temperature sensors. Figure 1 (Not shown).

[0025] The fan display module 110 can be connected to the main control board 120 via a connector on the rear surface (second surface) to enable power supply and data communication.

[0026] The fan display module 110 and the main control board 120 are fixed to the metal impeller 130 by means of clips or screws. The metal impeller 130 is also fixed to the motor 140 located in the metal motor compartment 150 at its rear by means of clips or screws. When the motor 140 rotates, it drives the metal impeller 130, the main control board 120 and the fan display module 110 to rotate together.

[0027] Continue reading Figure 2 , combined Figure 2 This describes the composition of the fan display module 110, in which... Figure 2 (a) is a schematic diagram of the first surface composition of a fan display module according to an embodiment of this application. Figure 2 (b) is a schematic diagram of the second surface composition of a fan display module according to an embodiment of the present application.

[0028] In this embodiment, the fan display module 110 includes four blades (blade 111, blade 112, blade 113 and blade 114), and each blade includes an LED bead 181, an LED driver chip 182 and a PCB board 183.

[0029] It should be noted that the number of blades in the fan display module is not limited to the four blades described in the embodiments of this application. The number of blades can also be three, six, eight, etc. Without deviating from the principle of this application, these modified or replaced technical solutions will fall within the protection scope of this application.

[0030] The fan display module 110 also includes at least one first temperature sensor 171 and at least one second temperature sensor 172. That is, the first temperature sensor 171 can be disposed on any one or more blades, and similarly, the second temperature sensor 172 can also be disposed on any one or more blades.

[0031] like Figure 2As shown in (a), the LED bead 181 and the first temperature sensor 171 are disposed on the first surface (front surface) of the PCB board 183. The first temperature sensor 171 is located at approximately one-third of the blade length radially from the center (point O) of the fan display module 110 (i.e., when the blade length is L, the first temperature sensor 171 is placed at a distance of approximately 1 / 3 * L from point O), and is placed close to the LED bead 181.

[0032] The first temperature sensor 171 is used to obtain the first operating temperature of the first heating area (LED bead heating area) corresponding to the LED bead 181. Considering that the linear velocity is different at different positions during the blade rotation process, the linear velocity is smaller closer to the center of the LED fan screen (point O of the fan display module 110), and the air convection speed is slower. Therefore, the first temperature sensor 171 is set at a distance of about 1 / 3*L from point O. This allows for the acquisition of a relatively accurate first operating temperature reflecting the overall heating situation of all LED beads 181 with a smaller number of first temperature sensors, resulting in high cost-effectiveness.

[0033] like Figure 2 As shown in (b), the LED driver chip 182 and the second temperature sensor 172 are disposed on the second surface (rear surface) of the PCB board 183, at a radial position about half the blade length from the center (point O) of the fan display module 110 (i.e., when the blade length is L, the second temperature sensor 172 is placed at a position about 1 / 2 * L from point O), and close to the LED driver chip 182.

[0034] The second temperature sensor 172 is used to obtain the second operating temperature of the second heating area (LED driver chip heating area) corresponding to the LED driver chip 182. Since one LED driver chip usually controls multiple LED beads, the density of LED driver chips on the second surface is usually much smaller than the density of LED beads on the first surface, resulting in more uniform heat dissipation in the second heating area. By placing the second temperature sensor 172 at a distance of approximately 1 / 2 * L from point O, a relatively accurate second operating temperature reflecting the overall heating situation of all LED driver chips can be obtained with a smaller number of second temperature sensors, offering high cost-effectiveness.

[0035] The main control board 120 primarily includes an FPGA chip, an MCU chip, and memory chips. The FPGA chip's main functions include timing control, interface control, and communication control to achieve complex display effects. The MCU chip's main functions include display control, GPIO control, and heat dissipation control. The memory chips' main functions include parameter storage and data frame buffering, working in conjunction with the MCU and FPGA chips to implement complex functions.

[0036] The main control board 120 is also equipped with a third temperature sensor to obtain the third operating temperature of the third heat-generating area (the heat-generating area of ​​the FPGA chip) corresponding to the FPGA chip. The third temperature sensor can be either a built-in temperature sensor of the FPGA chip or a dedicated temperature sensor placed near the FPGA chip.

[0037] The motor control board 160 mainly includes a motor control chip, a power management chip, etc. The main function of the motor control chip is to achieve precise control of the motor 140 and communicate with the main control board 120 to achieve synchronization between the motor and the LED display or to perform corresponding linkage control according to different scenarios. As an example, the motor control board 160 and the main control board 120 can communicate through an infrared pair.

[0038] The motor control board 160 is also equipped with a fourth temperature sensor to obtain the fourth operating temperature of the fourth heat-generating area (heat-generating area of ​​the motor control chip) corresponding to the motor control chip. The fourth temperature sensor can be either a built-in temperature sensor of the motor control chip or a dedicated temperature sensor placed near the motor control chip.

[0039] Continue reading Figure 3 , Figure 3 This is a flowchart illustrating the main steps of a heat dissipation control method for an LED fan screen according to an embodiment of this application. Figure 3 As shown, the main steps of the heat dissipation control method for LED fan screens include: Step S301: Initialize the LED fan screen; Step S302: Obtain the operating temperature of each heating area; Step S303: Based on the working temperature of each heating area, obtain the comprehensive temperature value according to the preset temperature influence weight of each heating area; Step S304: Based on the comprehensive temperature value, control the speed of the LED fan screen according to the preset temperature range and the corresponding relationship between the LED fan screen speed.

[0040] In this embodiment of the application, the MCU chip of the main control board 120 can be used to implement the heat dissipation control method of the LED fan screen.

[0041] In step S301, after the LED fan screen is powered on, the MCU chip initializes each device, including configuring the GPIO port, initializing the ADC, initializing the communication interface, etc., so that the LED fan screen enters the working state.

[0042] In step S302, according to a preset control cycle (e.g., 5 seconds), the MCU chip can obtain the corresponding operating temperature through temperature sensors set in each heat-generating area, as described above, specifically including: The first operating temperature T of the first heating area corresponding to the LED bead is obtained by the first temperature sensor. A ; The second operating temperature T of the second heating area corresponding to the LED driver chip is obtained by the second temperature sensor. B ; The third operating temperature T of the third heating area corresponding to the FPGA chip is obtained through the third temperature sensor. C ; The fourth operating temperature T of the fourth heating area corresponding to the motor control chip is obtained through the fourth temperature sensor. D .

[0043] In step S303, based on the magnitude of the impact of the four different heat-generating areas on the color consistency and brightness uniformity of the LED display, as well as the temperature tolerance of related devices, this application sets corresponding temperature influence weights for different heat-generating areas. The comprehensive temperature value (i.e., the overall operating temperature of the LED fan screen) calculated through this set of temperature influence weights can more accurately reflect the overall heat generation of the LED fan screen, which helps to improve the heat dissipation control effect of the LED fan screen.

[0044] Specifically, the temperature influence weights include: the first temperature influence weight corresponding to the first heating area (the weight corresponding to the LED bead operating temperature), the second temperature influence weight corresponding to the second heating area (the weight corresponding to the LED driver chip operating temperature), the third temperature influence weight corresponding to the third heating area (the weight corresponding to the FPGA chip operating temperature), and the fourth temperature influence weight corresponding to the fourth heating area (the weight corresponding to the motor control chip operating temperature). Among these, the first temperature influence weight is greater than the second temperature influence weight, the second temperature influence weight is greater than the third temperature influence weight, and the third temperature influence weight is greater than the fourth temperature influence weight.

[0045] After obtaining the weights corresponding to each heat-generating region (the operating temperature of each heat-generating device), the overall temperature value can be calculated using a weighted average method. As an example, if the weight of the first temperature influence is set to 35%, the second temperature influence to 30%, the third temperature influence to 20%, and the fourth temperature influence to 15%, the overall temperature value is: Among them, T P This is the overall temperature value.

[0046] In step S304, the MCU chip reads the correspondence table between temperature ranges and LED fan speeds from the storage chip, determines which temperature range the comprehensive temperature value belongs to, and controls the speed of motor 140 according to the fan speed corresponding to that temperature range. As an example, the correspondence table between temperature ranges and LED fan speeds is shown in Table 1.

[0047] Table 1: Correspondence between Temperature Range and LED Fan Screen Speed

[0048] The MCU chip outputs a PWM signal with a duty cycle corresponding to the fan screen speed to the motor control board 160 via the PWM interface. The motor control chip controls the speed of the motor 140 according to the PWM signal, thereby driving the fan display module 110 to rotate according to the set fan screen speed, thus realizing intelligent heat dissipation control of the LED fan screen. T P The higher the value, the higher the rotation speed of the LED fan screen. At this time, the air convection speed is higher, and the LED fan screen cools down faster. In this way, the rotation speed of the LED fan screen is intelligently adjusted according to the actual temperature change, achieving a balance between heat dissipation and energy saving.

[0049] By continuously executing steps S302 to S304, real-time temperature monitoring and intelligent heat dissipation of the main heat-generating components of the LED fan screen can be achieved, thereby improving the consistency of display colors and the uniformity of brightness, and effectively extending the service life of core components, thus avoiding safety accidents such as fires caused by circuit failures.

[0050] In another embodiment, the LED fan screen further includes one or more heat dissipation structures. As an example, multiple heat pipes can be attached to the surface of heat-generating devices such as LED driver chips and FPGA chips using thermal grease, and the heat pipes are connected to the metal impeller 130. As an example, the heat pipes can be made of copper.

[0051] The metal impeller 130 is designed as a metal impeller with heat dissipation fins. The large number of fins distributed on the surface of the metal impeller can efficiently conduct heat away, improving the heat dissipation effect of the LED fan screen.

[0052] Alternatively, the metal motor housing 150 can be designed as a metal motor housing with heat dissipation fins. The numerous fins distributed on the surface of the metal motor housing can efficiently conduct heat away, reducing the operating temperature of the motor 140 and ensuring the safe and efficient operation of the motor 140. As an example, the metal impeller 130 and the metal motor housing 150 can be made of aluminum alloy.

[0053] By using one or more of the above heat dissipation structures, the shortcomings of a single heat dissipation method (a single rotating convection heat dissipation method for LED fan screens) are solved, further improving the heat dissipation effect of LED fan screens and enhancing product safety.

[0054] This application also provides a display device that includes the LED fan screen in any of the above embodiments. As examples, the display device can be a digital billboard, a digital dynamic sand table, a 3D holographic fan screen, etc.

[0055] It should be noted that although the steps in the above embodiments are described in a specific order, those skilled in the art will understand that in order to achieve the effect of this application, different steps do not necessarily have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders. These adjusted solutions are equivalent to the technical solutions described in this application and therefore will also fall within the protection scope of this application.

[0056] Those skilled in the art will understand that all or part of the processes in the method of the above-described embodiment can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the above-described method embodiments. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable storage medium can include any entity or device capable of carrying the computer program code, a medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory, a random access memory, an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0057] The technical solution of this application has been described above with reference to one embodiment shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. An LED fan screen, characterized by, The LED fan screen comprises: a plurality of temperature sensors respectively arranged near a plurality of heat generating devices of the LED fan screen, for collecting temperature values of the corresponding heat generating devices; an MCU chip for obtaining a comprehensive temperature value based on the obtained temperature values, and controlling the rotation speed of the LED fan screen based on the comprehensive temperature value and a preset temperature interval.

2. The LED fan screen of claim 1, wherein, The LED fan screen further comprises: a fan display module comprising a plurality of blades, each of the blades comprising an LED lamp bead, an LED driving chip and a PCB board, wherein the LED lamp bead is arranged on a first surface of the PCB board, and the LED driving chip is arranged on a second surface of the PCB board; a main control board comprising an FPGA chip and the MCU chip; a motor control board comprising a motor control chip; wherein the heat generating devices comprise the LED lamp bead, the LED driving chip, the FPGA chip and the motor control chip.

3. The LED fan screen of claim 2, wherein, The temperature sensors comprise a first temperature sensor and a second temperature sensor, wherein: the first temperature sensor is arranged on the first surface of at least one of the blades, and is arranged at a position about one-third of the length of the blade away from the center of the fan display module, for obtaining a first working temperature of a first heat generating area corresponding to the LED lamp bead; the second temperature sensor is arranged on the second surface of at least one of the blades, and is arranged at a position about one-half of the length of the blade away from the center of the fan display module, for obtaining a second working temperature of a second heat generating area corresponding to the LED driving chip.

4. The LED fan screen of claim 3, wherein, The temperature sensors further comprise a third temperature sensor and a fourth temperature sensor, wherein: the third temperature sensor is arranged on the first surface of at least one of the blades, and is arranged at a position about one-third of the length of the blade away from the center of the fan display module, for obtaining a third working temperature of a third heat generating area corresponding to the FPGA chip; the fourth temperature sensor is arranged on the second surface of at least one of the blades, and is arranged at a position about one-half of the length of the blade away from the center of the fan display module, for obtaining a fourth working temperature of a fourth heat generating area corresponding to the motor control chip.

5. The LED fan screen of claim 4, wherein, The LED fan screen further comprises a metal impeller with heat dissipation fins.

6. The LED fan screen of claim 5, wherein, The LED fan screen further comprises: a heat pipe in thermal contact with at least one of the LED driving chip, the FPGA chip and the MCU chip, and the heat pipe is connected to the metal impeller.

7. The LED fan screen of claim 4, wherein, The LED fan screen further comprises a metal motor compartment with heat dissipation fins.

8. The LED fan screen according to any one of claims 4 to 7, wherein, The MCU chip is configured to: obtain the comprehensive temperature value based on preset temperature influence weights of the heat generating areas; wherein the first temperature influence weight corresponding to the first heat generating area is greater than the second temperature influence weight corresponding to the second heat generating area; the second temperature influence weight is greater than the third temperature influence weight corresponding to the third heat generating area; the third temperature influence weight is greater than the fourth temperature influence weight corresponding to the fourth heat generating area.

9. The LED fan screen of claim 1, wherein, The LED fan screen further comprises a motor, and the MCU chip is configured to: control the rotation speed of the motor based on the comprehensive temperature value, according to a preset temperature interval and LED fan screen rotation speed corresponding relationship.

10. A heat dissipation control method of an LED fan screen, characterized by, The method is applied to the LED fan screen of claim 1 to claim 7, and the method comprises: obtaining working temperatures of the heat generating areas; Based on the working temperature of each heat generating area, a comprehensive temperature value is obtained according to preset temperature influence weights of each heat generating area; Based on the comprehensive temperature value, a speed of the LED fan screen is controlled according to a preset temperature interval and LED fan screen speed corresponding relationship.

11. The heat radiation control method according to claim 10, wherein The method comprises: a first working temperature of a first heat generating area corresponding to an LED lamp bead is obtained by a first temperature sensor, a second working temperature of a second heat generating area corresponding to an LED driving chip is obtained by a second temperature sensor, a third working temperature of a third heat generating area corresponding to an FPGA chip is obtained by a third temperature sensor, a fourth working temperature of a fourth heat generating area corresponding to a motor control chip is obtained by a fourth temperature sensor; the temperature influence weights comprise: a first temperature influence weight corresponding to the first heat generating area; a second temperature influence weight corresponding to the second heat generating area; a third temperature influence weight corresponding to the third heat generating area; a fourth temperature influence weight corresponding to the fourth heat generating area; wherein the first temperature influence weight is greater than the second temperature influence weight, the second temperature influence weight is greater than the third temperature influence weight, and the third temperature influence weight is greater than the fourth temperature influence weight.

12. A display device comprising: The display device comprises the LED fan screen of any one of claims 1 to 9.

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