Electrostatic elution dust removal device and method for LED display screen

Abstract

The invention provides an LED display screen electrostatic elution dust removal device and method, and belongs to the field of LED display screen dust removal. The device comprises an electrostatic generator, an electrostatic dust collection rod integrating a blowing and sucking module and a washing and mopping module, a dust collection bin and an anti-static cleaning liquid supply module. The core is that efficient dust removal and self-cleaning are achieved through a precise and controllable static positive and negative switching mechanism in cooperation with blowing and suction cooperation, roller washing and mopping and anti-static cleaning liquid supply functions, a conductive dust removal head generates static electricity to adsorb dust on the surface of a screen body through positive voltage, the blowing function assists in breaking stubborn dust viscosity, roller washing and mopping strengthens physical stripping, and the dust removal effect is good. The dust collection function captures fine dust; the reverse voltage generates a reverse electric field to separate the dust removal head from dust on the surface of the roller, and centralized collection of dust is accelerated by cooperating with a blowing and sucking function; the problems that an existing dust removal mode is poor in fine / stubborn dust removal effect and prone to secondary pollution, and the self-cleaning capacity of tools is insufficient are solved, and the LED display screen dust removal device is suitable for daily cleaning and maintenance of various LED display screens.

Description

An electrostatic dust removal device and method for LED displays Technical Field

[0001] This application relates to the field of LED display screen dust removal technology, and in particular to an electrostatic washing and dust removal device and method for LED displays. Background Technology

[0002] LED displays are widely used in outdoor advertising, stadiums, transportation hubs and other scenarios. Their surfaces are prone to dust accumulation, which not only affects the display effect, but may also shorten the lifespan due to the corrosive components in the dust eroding the screen.

[0003] Dust removal for LED displays primarily relies on traditional methods, including manual wiping, simple high-pressure airflow blowing, and basic electrostatic dust removal. These methods are widely used in indoor and outdoor advertising screens, stadium screens, and transportation hub displays. Manual wiping involves directly wiping the screen with a hand-held cloth or cleaning cloth. High-pressure airflow blowing uses a high-pressure air pump to generate airflow that directly blows away dust from the screen surface. Basic electrostatic dust removal uses a simple electrostatic generator to create an electrostatic field that attracts fine dust particles from the screen surface, but lacks supporting auxiliary cleaning and dust collection structures. All three methods are single-function designs, lacking a collaborative working mechanism and failing to precisely adapt to the characteristics of LED display materials (such as the voltage tolerance differences between acrylic and tempered glass masks) and dust types (dry / sticky, fine / stubborn).

[0004] The core problems with the above methods include: (i) poor dust removal effect and insufficient adaptability: manual wiping is not able to completely capture fine dust (particle size ≤ 5μm), and the surface hardness of the screen varies greatly (acrylic has low hardness and tempered glass has high hardness). Uniform wiping force can easily cause scratches on the acrylic mask, and stubborn sticky dust (such as mixed dust formed by outdoor dust and rainwater) is difficult to completely remove.

[0005] High-pressure airflow can only blow away larger dust particles, and its adsorption capacity for fine dry dust is insufficient. Dust is easily suspended and diffused, causing secondary pollution. In addition, the impact force of the airflow is uncontrollable, which may cause the sealant at the edge of the screen to age and fall off.

[0006] Basic electrostatic dust removal relies solely on a single electrostatic field for adsorption, lacking auxiliary methods to break up sticky dust. This results in poor removal of sticky dust. Furthermore, the electrostatic output parameters are fixed, making it impossible to adjust the voltage according to the screen material. This can easily lead to corona discharge damage to the screen due to excessively high voltage, or insufficient adsorption efficiency due to excessively low voltage.

[0007] (ii) Lack of self-cleaning ability of dust removal tools: After the conductive dust removal head of the basic electrostatic dust removal device adsorbs dust, there is no active cleaning mechanism. It needs to be manually disassembled and cleaned, which is cumbersome and can easily cause the dust to fall again. Although some devices are equipped with simple wiping structures, the cleaning is not thorough. The residual dust will reduce the efficiency of subsequent dust removal, and long-term accumulation will also affect the stability of the electrostatic field.

[0008] (iii) High risk of secondary pollution: Traditional methods lack a sealed dust collection structure: Dust and debris generated by manual wiping are easy to fall into the gaps of the screen; high-pressure airflow blowing has no directional collection design, and the blown dust is easy to spread to the surrounding environment; basic electrostatic dust removal does not have a dedicated dust collection device, and the adsorbed dust is easy to fall off during operation, causing secondary pollution, especially in outdoor scenarios where the pollution problem is more prominent due to the influence of wind.

[0009] (iv) Low operating efficiency and insufficient safety: manual wiping requires meticulous operation of each area, and operation on large-size displays (such as outdoor plaza screens) takes a long time. Moreover, manual movement is difficult and inefficient when working at heights. High-pressure airflow blowing and basic electrostatic dust removal require frequent movement of equipment, lack of quick parameter adjustment function, and cumbersome operation when adapting to different dust types.

[0010] The basic electrostatic dust removal device lacks overcurrent protection and voltage stabilization design. Excessive current can easily cause corona discharge, which may damage the screen drive circuit. If the screen is not completely de-energized during manual wiping, there is a risk of electric shock. The air pressure of the high-pressure airflow is not graded and adjustable. The high-pressure airflow directly impacts the screen, which may cause the screen module to loosen.

[0011] (v) Poor technical synergy and lack of precise control mechanism: In the existing technology, electrostatic, blowing and suction and dust collection functions are mostly designed independently and have not formed a synergistic operation: electrostatic adsorption and airflow blowing are not coordinated in sequence, and airflow is easy to destroy the electrostatic field; there is a lack of intelligent identification and parameter adaptation mechanism for dust type and screen material, which relies on manual judgment and adjustment, and the operation threshold is high; electrostatic polarity switching is mostly controlled by simple relays, with slow switching response (≥50ms) and poor voltage and current stability, which can easily damage the screen or reduce the dust removal effect due to electric field fluctuations. Summary of the Invention

[0012] To address the aforementioned technical problems, this application proposes an electrostatic dust removal device and method for LED displays.

[0013] The technical solution adopted in this application is as follows: an electrostatic dust removal device for LED displays, comprising an electrostatic generator, an electrostatic dust removal rod, a dust collection chamber, and a cleaning fluid supply module. The electrostatic dust removal rod is detachably electrically connected to the electrostatic generator. An insulated handle is provided at the top of the electrostatic dust removal rod, and a conductive dust removal head is provided at the bottom of the electrostatic dust removal rod. The conductive dust removal head is connected to the electrostatic generator via a shielded wire. The electrostatic dust removal rod integrates a control module, a power supply module, a blowing and suction module, and a washing and mopping module. A dust collection interface is provided on the outside of the electrostatic dust removal rod, and the dust collection chamber is connected to the dust collection interface via a sealed pipe. The power supply module is connected to the electrostatic generator and the blowing and suction of the electrostatic dust removal rod. The module, washing and mopping module, control module, and cleaning fluid supply module are electrically connected. The control module is signal-connected to the electrostatic generator, the blowing and suction module of the electrostatic dust removal rod, the washing and mopping module, and the cleaning fluid supply module, respectively. It is used to control the voltage output direction, output status, and switching sequence of the electrostatic generator, the blowing / dust suction mode switching and start / stop of the blowing and suction module, the start / stop and forward / reverse rotation of the washing and mopping module, and the start / stop and flow rate adjustment of the cleaning fluid supply module. The cleaning fluid supply module is connected to the washing and mopping module through a liquid guide tube. The electrostatic generator has an electrostatic forward / reverse switching function, which is realized by the coordinated control program of the forward / reverse voltage switching unit of the electrostatic generator and the control module.

[0014] Furthermore, the forward and reverse voltage switching unit includes a dual-channel high-voltage relay, a polarity conversion circuit, a voltage stabilization circuit, and an overcurrent protection circuit. The dual-channel high-voltage relay is used to receive digital control signals from the control module. The polarity conversion circuit consists of a high-voltage rectifier bridge, a filter capacitor, and a current-limiting resistor. The high-voltage rectifier bridge converts the DC high voltage from the dual-channel high-voltage relay into a switchable forward and reverse voltage, and outputs a stable forward and reverse voltage after filtering by the filter capacitor and protection by the current-limiting resistor. The voltage stabilization circuit adjusts the forward and reverse voltages output by the polarity conversion circuit to the set values. The overcurrent protection circuit is connected in series in the high-voltage output circuit. The overcurrent protection circuit includes a high-voltage current sensor and a fast-acting fuse. The current sensor monitors the output current in real time. When the current exceeds the set value, it immediately sends a signal to the control module. The control module triggers the dual-channel high-voltage relay to disconnect, and at the same time cuts off the high-voltage output of the electrostatic generator.

[0015] Furthermore, the logic of the collaborative control program of the control module is as follows: The collaborative control program built into the control module is used to realize the timing control, parameter adjustment and status monitoring of electrostatic forward and reverse switching. The switching timing is preset to the process of "forward output - delayed decay - reverse output - reverse shutdown". The delay decay time can be dynamically adjusted according to the material of the LED display and the ambient humidity. Voltage and current feedback signals are collected in real time through the ADC interface, and the PID algorithm is used to adjust the duty cycle of the PWM output to stabilize the forward voltage at the set value ±0.05kV and the current at the set value ±0.01μA. The status monitoring module monitors the relay switching status and voltage and current fluctuations in real time. When abnormalities occur, an alarm is triggered and the high voltage output is cut off.

[0016] Furthermore, the control module includes a microcontroller, a voltage detection unit, a current detection unit, a dust detection module, an environmental sensor, an infrared ranging sensor, and a drive unit. The environmental sensor is used to collect ambient humidity and temperature data, the infrared ranging sensor is used to detect the curvature and distance of the screen, the dust detection module includes an infrared dust sensor and an overflow sensor, used to collect dust particle size, viscosity coefficient, and dust collection box overflow status, and the drive unit is used to drive the start / stop and operation status adjustment of the blowing and suction module, the washing and mopping module, and the cleaning liquid supply module.

[0017] Furthermore, the blowing and suction module includes a blowing channel, a suction channel, a mini blower, and a mini suction pump. The air outlet of the blowing channel forms an angle of 30° to 60° with the surface of the conductive dust removal head, and the air inlet of the suction channel is arranged around the conductive dust removal head.

[0018] Furthermore, the cleaning fluid supply module includes a miniature storage tank, a miniature peristaltic pump, and a fluid guide tube. The miniature storage tank is used to store antistatic cleaning fluid, and the miniature peristaltic pump delivers the cleaning fluid to the washing and mopping module through the fluid guide tube, with adjustable flow rate.

[0019] Furthermore, the dust collection chamber adopts a sealed structure with a built-in detachable anti-static dust collection box. The anti-static dust collection box has a built-in miniature compression mechanism to compact the dust. The pipe connecting the dust collection chamber and the dust suction channel is made of polytetrafluoroethylene and connected by a silicone sealing joint. Both the overflow sensor and the infrared dust sensor are located inside the anti-static dust collection box.

[0020] Furthermore, the washing and mopping module includes a micro DC motor and soft anti-static silicone rollers. The rollers have a Shore hardness of 35-45 degrees and are covered with micron-level anti-slip protrusions. They are connected to the electrostatic dust removal rod via quick-release buckles and are driven to rotate forward and backward by the micro DC motor.

[0021] An electrostatic dust removal method for LED displays, employing the aforementioned electrostatic dust removal device for LED displays, includes the following steps: S1: Equipment startup and parameter initialization; S2: Dust identification and adaptive mode matching: The control module collects dust particle size and viscosity coefficient data in real time through the dust detection module, and automatically matches the working mode and parameters based on environmental data; S3: Dynamic dust removal operation: The operator moves the electrostatic dust removal rod, and the control module dynamically adjusts the distance between the electrostatic dust removal rod and the LED display and the moving speed of the electrostatic dust removal rod through an infrared ranging sensor; The conductive dust removal head generates a positive electrostatic field to adsorb dust, and stubborn / sticky dust is captured by the suction channel after detachment; S4: Self-cleaning mode triggering and pre-processing: When the dust detection module detects that the dust accumulation on the conductive dust removal head or roller reaches a preset threshold, or when the operator triggers a self-cleaning command, the control module switches to self-cleaning mode; S5: Multi-stage self-cleaning and dust compression collection; S6: Operation completion and fault self-healing.

[0022] Furthermore, in step S2, the working mode and parameters are automatically matched based on environmental data as follows: when the dust particle size is ≤5μm and the viscosity coefficient is <0.3, the "static + vacuuming" mode is matched, and the washing and mopping module and cleaning liquid supply are turned off; when the dust particle size is >5μm or 0.3≤viscosity coefficient<0.7, the "static + blower + vacuuming + roller washing and mopping" mode is matched, and the cleaning liquid supply is turned off; when the dust viscosity coefficient is ≥0.7, the "static + blower + vacuuming + roller washing and mopping + cleaning liquid supply" mode is matched.

[0023] The beneficial effects of this application compared to the prior art are as follows: leading synergistic dust removal efficiency: integrating the triple mechanism of "electrostatic forward and reverse switching + directional blowing + ring suction", forming a dust removal closed loop of "adsorption-breaking adhesion-capture" and a self-cleaning closed loop of "repulsion-acceleration-collection", the dust removal efficiency and self-cleaning efficiency can reach more than 98%, which is 6 times more efficient than traditional manual wiping and 40% more efficient in removing stubborn dust than simple electrostatic dust removal.

[0024] It has extremely strong scene adaptability: voltage (5kV-30kV), current (0.1μA-5μA), wind speed (3m / s-8m / s), negative pressure (-8kPa to -20kPa) are all adjustable, and it is compatible with acrylic / tempered glass covers, dry / sticky dust, flat / curved screens, covering the cleaning needs of LED displays in all indoor and outdoor scenarios.

[0025] Outstanding safety and stability: Through the design of dual high-voltage relays (switching response ≤10ms), PID closed-loop control (voltage accuracy ±0.1kV), overcurrent protection (automatic power-off after >5μA) and insulated handle (withstand voltage ≥50kV), the risk of screen scratches, corona discharge and electric shock is eliminated, and the failure rate of the equipment during continuous operation is <0.5%.

[0026] Easy to operate and maintain: Handheld integrated design, weighing ≤1.5kg, equipped with one-button mode switching and parameter knob; the dust collection box is removable and washable and supports dust compression (volume reduction of 60%), a single maintenance can support continuous operation for 4 hours, and no professional skills are required to operate.

[0027] Environmentally friendly and pollution-free: The sealed dust collection design avoids secondary dust generation, the dust collection box is recyclable, and no chemical cleaning agents are used, meeting environmental protection requirements.

[0028] Ensuring public safety: It replaces manual wiping work at heights, reducing safety risks such as falls from heights and electric shocks, and is especially suitable for cleaning large LED screens in stadiums, high-rise building exteriors, and other similar locations.

[0029] Enhancing the public experience: Maintaining the high-definition display effect of LED screens, improving the information transmission quality of public scenarios such as outdoor advertising, traffic guidance, and live sports broadcasts, and improving the overall quality of urban public service facilities. Attached Figure Description

[0030] The present application will be further described below with reference to the accompanying drawings: Figure 1 is a structural block diagram of the device provided in the embodiment of the present application; Figure 2 is a flowchart of the dust removal method provided in the embodiment of the present application. Detailed Implementation

[0031] As shown in Figures 1 and 2, this application provides an electrostatic washing and dust removal device for LED displays, including: an electrostatic generator, an electrostatic dust removal rod, a dust collection chamber, and a cleaning fluid supply module. The electrostatic dust removal rod is detachably electrically connected to the electrostatic generator. An insulated handle is provided at the top of the electrostatic dust removal rod, and a conductive dust removal head is provided at the bottom of the electrostatic dust removal rod. The conductive dust removal head is connected to the electrostatic generator through a shielded wire. The electrostatic dust removal rod integrates a control module, a power supply module, a blowing and suction module, and a washing and mopping module. A dust collection interface is provided on the outside of the electrostatic dust removal rod, and the dust collection chamber is connected to the dust collection interface through a sealed pipe for storing the dust captured by the suction channel.

[0032] The power supply module is electrically connected to the electrostatic generator, the blowing and suction module of the electrostatic dust removal rod, the washing and mopping module, the control module, and the cleaning liquid supply module, respectively, to provide working voltage for each component.

[0033] The control module is connected to the electrostatic generator, the blowing and suction module of the electrostatic dust removal rod, the washing and mopping module, and the cleaning liquid supply module respectively. It is used to control the voltage output direction, output status and switching sequence of the electrostatic generator, the blowing / dust suction mode switching and start / stop of the blowing and suction module, the start / stop and forward / reverse rotation of the washing and mopping module, and the start / stop and flow rate adjustment of the cleaning liquid supply module.

[0034] The control module includes a microcontroller, a voltage detection unit, a current detection unit, a dust detection module, an environmental sensor, an infrared ranging sensor, and a drive unit. The microcontroller is an STM32F103ZET6; the voltage detection unit uses an LV25-P sensor with a detection accuracy of ±0.05kV; the current detection unit uses an LA25-NP sensor with a detection accuracy of ±0.01μA; the dust detection module includes an infrared dust sensor and an overflow sensor to collect dust particle size, viscosity coefficient, and dust collection box overflow status; the environmental sensor is an SHT30 to collect ambient humidity (5%-95%RH) and temperature (-10℃-60℃) data; the infrared ranging sensor is a VL53L0X to detect screen curvature and distance with an accuracy of ±1mm; the drive unit uses an L298N chip paired with an IRF540 power MOSFET to drive the start / stop and operation status adjustment of the blowing / suction module, the washing / mopping module, and the cleaning fluid supply module.

[0035] The blowing and suction module includes an air blowing channel, a dust suction channel, a mini blower, and a mini dust pump. The dust suction channel is connected to the dust collection interface. The air outlet of the blowing channel forms a 30°-60° angle with the surface of the conductive dust removal head, and the air inlet of the dust suction channel is arranged around the conductive dust removal head. The inner walls of the blowing and suction channels are coated with a polytetrafluoroethylene antistatic coating. The blowing and suction module is driven by 12V DC, the wind speed of the mini blower is adjustable from 3m / s to 8m / s, and the negative pressure value of the mini dust pump is adjustable from -8kPa to -20kPa.

[0036] The washing and mopping module includes a miniature DC motor and soft anti-static silicone rollers. The rollers have a Shore hardness of 35-45 degrees and are covered with micron-level anti-slip protrusions. They are connected to the electrostatic dust removal rod via quick-release buckles.

[0037] The cleaning fluid supply module includes a miniature reservoir, a miniature peristaltic pump, and a delivery tube. The miniature reservoir stores the antistatic cleaning fluid, and the miniature peristaltic pump delivers the cleaning fluid to the washing and mopping module via the delivery tube; the flow rate is adjustable. The miniature reservoir has a capacity of 50 mL and is located at the insulated handle. The miniature peristaltic pump has a flow rate of 0.5 mL / min-1 mL / min. The delivery tube has a diameter of 1 mm and delivers the cleaning fluid to the roller shaft. The reservoir is equipped with a level sensor; a low level indicator light on the handle prompts the user to add more fluid. The surface resistivity of the antistatic cleaning fluid is 10 Ω. 8 Ω-10 10 It has an Ω content, a pH value of 6.5-7.5, contains no organic solvents, is volatile and leaves no residue, and uses an ionic surfactant formulation with a concentration of 0.5%-1%.

[0038] The electrostatic generator has a built-in forward and reverse voltage switching unit. Through the control module command, it can realize the forward voltage output of 5kV~30kV / 0.1μA~5μA or the reverse voltage output of -5kV~-30kV / 0.1μA~5μA, so that the conductive dust removal head generates a corresponding forward electrostatic field or reverse electric field.

[0039] The conductive dust removal head is made of 316L special stainless steel with electrolytic polishing treatment, achieving a roughness Ra≤0.8μm. It ranges in length from 100mm to 500mm and in diameter from 8mm to 15mm, and connects to the electrostatic generator via a shielded wire. The insulated handle is made of epoxy resin, with a voltage resistance ≥50kV, and integrates operation buttons and knobs, including start / stop and mode selection buttons. The washing and mopping module includes a miniature DC motor and soft anti-static silicone rollers. The rollers have a Shore hardness of 40 and a surface covered with micron-level anti-slip protrusions. They connect to the electrostatic dust removal rod via quick-release clips. The motor drives the rollers in both forward and reverse rotation (forward for cleaning, reverse for dust removal). The miniature DC motor operates at 12V, supports both forward and reverse rotation, and has an adjustable speed range of 280rpm-400rpm.

[0040] The washing and mopping module, the blowing and suction module, and the conductive dust removal head are coaxially and closely integrated at the bottom of the electrostatic dust removal rod. The three are spatially closely coordinated and their working areas highly overlap. The adsorbed dust does not fall directly onto the rollers, but is detached from the screen through the synergistic effect of electrostatic adsorption, airflow assistance, and physical peeling, and is then quickly captured by the suction channel. The rollers only serve to physically peel off stubborn dust and do not become the main carrier of dust. The specific positions and dust movement paths are as follows: I. Core positional relationship of the three: Conductive dust removal head: As the core electrostatic generating component, it is the core working end at the bottom of the dust removal rod. It is long and rod-shaped and is the central component of the entire cleaning operation. The blowing and suction module and the washing and mopping module are arranged around it.

[0041] Blowing and Suction Module: Blowing Channel: The air outlet forms a 30°~60° angle with the surface of the conductive dust removal head, obliquely aligned with the contact surface between the conductive dust removal head and the LED screen. The airflow directly acts on the dust attachment point on the screen, assisting in breaking the adhesion; Suction Channel: The air inlet is set around the conductive dust removal head, forming a ring-shaped negative pressure zone, completely covering the electrostatic adsorption working range of the conductive dust removal head, ensuring that the detached dust has no escape space.

[0042] Washing and mopping module: Soft anti-static silicone rollers are connected to the dust removal rods via quick-release buckles and are arranged close to the working surface of the conductive dust removal head. The cleaning contact surface of the rollers and the electrostatic adsorption surface of the conductive dust removal head are on the same working plane (both aligned with the LED screen), and the length of the rollers is adapted to the conductive dust removal head to achieve complete coverage of the working area. A micro DC motor drives the rollers to rotate forward and backward. When rotating forward, the rollers contact the screen to perform washing and mopping stripping actions.

[0043] The three components are integrated at the bottom of the dust collector bar with no obvious spatial gaps. The working areas overlap significantly, forming an integrated working structure of "electrostatic adsorption + airflow assistance + physical stripping + ring-shaped dust collection".

[0044] II. Dust Movement Path (No Direct Fall to Rollers) The positive electrostatic field generated by the conductive dust removal head will directly attract dust from the LED screen surface to the dust removal head surface (rather than the rollers). Subsequent dust removal and collection will occur in two ways, neither of which will allow dust to fall directly onto the rollers: Dry fine dust: Directly attracted by the electrostatic field of the conductive dust removal head, and quickly sucked into the suction channel under the annular negative pressure, then transferred to the dust collection chamber; Stubborn / sticky dust: While being attracted by electrostatic field, the oblique airflow in the blowing channel impacts the dust to break down its stickiness. The rollers rotate forward and contact the screen to physically peel off any stubborn dust that has not been completely attracted. The peeled dust is instantly attracted by the electrostatic field of the conductive dust removal head and then captured by the annular suction channel. Only a very small amount of dust will adhere to the roller surface, and it can be removed by the reverse electric field + blowing + reverse dust removal in the self-cleaning mode.

[0045] In short, the core function of the roller is to remove stubborn dust from the screen, rather than to collect the dust adsorbed by the conductive dust removal head. The adsorbed dust always uses the conductive dust removal head as a temporary carrier and is then quickly collected by the surrounding suction channel, thus preventing dust from accumulating on the roller or falling and causing secondary pollution.

[0046] The dust collection chamber adopts a sealed structure with a built-in removable anti-static dust collection box with a capacity of 500mL-1000mL. The inner wall of the box is coated with a nano-waterproof coating and an anti-static lining. The anti-static dust collection box has a built-in micro compression mechanism that can compact the dust to 40% of its original volume. The pipe connecting the dust collection chamber and the dust suction channel is made of polytetrafluoroethylene and connected with a silicone sealing joint. The overflow sensor is connected to the control module. When the dust collection box reaches 80% capacity, an alarm is triggered by the indicator light on the insulated handle.

[0047] In one specific embodiment, the power supply module can also be equipped with a 10000mAh rechargeable lithium battery and a corresponding circuit module, with an output voltage of 12V, supporting fast charging, and a built-in voltage and overcurrent protection unit, which can support the device to operate continuously for more than 3.5 hours.

[0048] In one specific embodiment, the electrostatic generator is an adjustable DC electrostatic generator with a forward output voltage of 5kV-30kV and a current of 0.1μA-5μA, and a reverse output voltage of -5kV to -30kV and a current of 0.1μA-5μA. The output parameters can be adjusted according to the screen material (acrylic / tempered glass) and the dust type (dry / sticky) to avoid corona discharge damage to the screen. The switching response time of the forward and reverse voltage switching unit is ≤10ms.

[0049] The electrostatic forward / reverse switching mechanism of the electrostatic generator in this application is the core of achieving efficient dust removal and self-cleaning. It consists of the forward / reverse voltage switching unit of the electrostatic generator and the collaborative control program of the control module, and has the characteristics of fast switching response, stable voltage and current, and precise and controllable timing.

[0050] The forward / reverse voltage switching unit includes dual high-voltage relays, a polarity conversion circuit, a voltage stabilization circuit, and an overcurrent protection circuit. The dual high-voltage relays receive digital control signals from the control module to achieve rapid switching of the voltage output direction. They employ HVP series high-voltage relays with a withstand voltage ≥50kV and a switching response time ≤10ms. The relay's two contacts are connected to the forward high-voltage output terminal and the reverse high-voltage output terminal respectively, ensuring rapid switching of the voltage output direction without superposition leakage.

[0051] The polarity conversion circuit consists of a high-voltage rectifier bridge, a filter capacitor, and a current-limiting resistor. The high-voltage rectifier bridge uses silicon stack rectifier elements with a withstand voltage ≥50kV and a rated current ≥10μA, used to convert the DC high voltage from the dual-channel high-voltage relay into a switchable forward and reverse voltage. The filter capacitor uses a 1000pF high-voltage ceramic capacitor with a withstand voltage ≥50kV, used to filter out voltage ripple and ensure stable forward and reverse voltage output. The current-limiting resistor uses a 100MΩ metal film resistor to limit the loop current, avoid sudden current changes during switching, and ensure stable forward and reverse voltage output. The voltage stabilization circuit adopts a series-type voltage regulator structure, with the core component being an OPA847 high-voltage operational amplifier and a withstand voltage of ≥50kV. The high-voltage regulator is a MOSFET with a voltage regulation accuracy of ±0.1kV and a current stability of ≤±0.05μA. The high-voltage operational amplifier is used to compare the difference between the reference voltage and the actual output voltage. The high-voltage regulator is used to adjust the voltage drop of the regulator according to the output signal of the operational amplifier to stabilize the output voltage at the set value. The overcurrent protection circuit is connected in series in the high-voltage output circuit. It adopts a high-voltage current sensor and a fast-blow fuse. The current sensor monitors the output current in real time. When the current exceeds 5μA, it immediately sends a signal to the control module. The control module triggers the dual high-voltage relays to disconnect and cuts off the high-voltage output of the electrostatic generator to avoid overcurrent damage to the panel or equipment.

[0052] Collaborative Control Program Logic: The microcontroller of the control module has a built-in collaborative control program responsible for the timing control, parameter adjustment, and status monitoring of electrostatic forward / reverse switching. The switching timing is preset to a "forward output - delayed decay - reverse output - reverse shutdown" process, and the delay decay time can be dynamically adjusted (2s-5s) according to the LED display material and ambient humidity. The parameter closed-loop control acquires voltage and current feedback signals in real time through the ADC interface, and uses a PID algorithm to adjust the PWM output duty cycle to stabilize the forward voltage at the set value ±0.05kV and the current at the set value ±0.01μA. The reverse voltage can be set to 80%-120% of the forward voltage. The status monitoring module monitors the relay switching status and voltage and current fluctuations in real time. When abnormalities occur, an alarm is triggered and the high-voltage output is cut off.

[0053] Electrostatic forward / reverse switching process: In the forward output stage, the control module sends a forward switching command, the forward contacts of the dual high-voltage relays close, and the forward voltage is transmitted to the conductive dust removal head after being regulated to generate an electrostatic field; in the switching transition stage, the forward contacts open, and there is a delay of 2s-5s for the residual electrostatic discharge to decay; in the reverse output stage, the reverse contacts close, and the reverse voltage is transmitted to the conductive dust removal head to generate a reverse electric field, which promotes the removal of dust.

[0054] Based on the above-mentioned device, this application also proposes an electrostatic dust removal method for LED displays, including the following steps: S1: Equipment start-up and parameter initialization: The operator starts the equipment through the start / stop button on the insulated handle, the power supply module starts, and supplies power to each component; the microcontroller is initialized and basic preset parameters are loaded; the environmental sensor collects environmental humidity and temperature data in real time, the dust detection module collects initial dust data, and the microcontroller dynamically adjusts the initial parameters by combining the two types of data; the electrostatic forward and reverse switching timing parameters, blowing and suction parameters, washing and mopping parameters, and cleaning fluid supply parameters are initialized synchronously to their default values.

[0055] S2: Dust Recognition and Adaptive Mode Matching: The control module collects dust particle size and viscosity coefficient data in real time through the dust detection module, and automatically matches the working mode and parameters based on environmental data: When the dust particle size is ≤5μm and the viscosity coefficient is <0.3, the "static + vacuuming" mode is matched, and the washing and mopping module and cleaning liquid supply are turned off; when the dust particle size is >5μm or the viscosity coefficient is ≥0.3 and <0.7, the "static + blowing + vacuuming + roller washing and mopping" mode is matched, and the cleaning liquid supply is turned off; when the dust viscosity coefficient is ≥0.7, the "static + blowing + vacuuming + roller washing and mopping + cleaning liquid supply" mode is matched; the operator can manually switch modes, and manual commands have higher priority; the control module sends a positive voltage output command to the electrostatic generator to start the corresponding module function; the voltage detection unit and current detection unit detect the output parameters in real time and feed them back to the microcontroller for dynamic adjustment through PID algorithm.

[0056] S3: Dynamic Dust Removal Operation (including adaptation for irregularly shaped screens): The operator holds an insulated handle to move the electrostatic dust removal rod. The control module uses an infrared distance sensor to detect the curvature and distance of the screen in real time, dynamically adjusting the distance between the conductive dust removal head and the screen (maintaining a dynamic range of 5mm-20mm) and the moving speed (0.1m / s-0.5m / s). A stable positive electrostatic field is generated on the surface of the conductive dust removal head to adsorb dust. Stubborn / sticky dust is detached with the assistance of airflow in the blowing channel and then peeled off by the rotating roller washing module. At the same time, the dust suction channel is opened to generate a negative pressure field through the annular air inlet, sucking in the dust and transferring it to the dust collection box. When cleaning fluid needs to be supplied, the micro peristaltic pump is started, and the cleaning fluid permeates to the roller through the liquid guide tube to help break down sticky dust. The voltage of the electrostatic generator is reduced by 10% at the same time when supplying liquid.

[0057] S4: Self-cleaning mode triggering and pre-processing: When the dust detection module detects that the dust accumulation on the conductive dust removal head or roller reaches the preset threshold, or when the operator triggers the self-cleaning command, the control module switches to self-cleaning mode; first, the positive voltage and cleaning fluid supply are turned off, and the residual current is monitored in real time through the current detection unit. When the current is ≤0.01μA, a reverse voltage output command is sent (the reverse voltage gradually increases from 50% of the positive voltage to the set value), and the electrostatic generator switches to the reverse output state, applying a reverse voltage to the conductive dust removal head to generate a reverse electric field; at the same time, the blowing and suction module is controlled to switch to the "blowing + vacuuming" collaborative mode, and the washing and mopping module starts to reverse.

[0058] S5: Multi-stage self-cleaning and dust compression collection: Pre-blowing stage (1-3s): Low wind speed (3m / s) loosens dust, and the roller reverses at 400rpm to assist in dust removal; Strong repulsion stage (3-15s): Full-load reverse voltage + high wind speed (5m / s) accelerates detachment, and the roller continues to reverse; Fine collection stage (15-30s): High negative pressure (-18kPa) captures suspended dust; When the dust collection box reaches 60% capacity, the micro compression mechanism is activated to compact the dust; The control module records the number of dust removals and the amount of compression, and prompts for cleaning when the threshold is reached.

[0059] S6: Operation Completion and Fault Self-Healing: After self-cleaning is completed, the reverse voltage, blowing and suction module, and washing and mopping module are turned off, and the power supply module enters standby mode; when the dust collection box is full, the indicator light flashes to alarm; during operation, the control module monitors the status of each component in real time, and automatically starts the compensation mode when a fault is detected: when the blowing channel is faulty, the electrostatic voltage is increased by 10% and the suction negative pressure is increased to -20kPa; when the electrostatic generator is faulty, it switches to the "enhanced blowing and suction + washing and mopping" mode, with the blowing speed at 8m / s, the suction negative pressure at -18kPa, and the roller speed increased by 20%; when the washing and mopping module is faulty, the blowing speed and suction negative pressure are increased to prolong the electrostatic adsorption time; when the relay switching fails, the alarm is immediately triggered and the high-voltage output is cut off, and the fault information is recorded.

[0060] This application achieves efficient dust removal and self-cleaning through a precise and controllable electrostatic forward / reverse switching mechanism, combined with blow-suction coordination, roller washing and mopping, and anti-static cleaning fluid supply. The forward voltage causes the conductive dust removal head to generate electrostatic adsorption of dust on the screen surface, while the blowing function helps break down stubborn dust adhesion. The roller washing and mopping enhances physical peeling, and the suction function captures fine dust. The reverse voltage generates a reverse electric field that detaches the electrostatic dust removal head from the roller surface, and the combined blow-suction function accelerates dust collection. Anti-static cleaning fluid is supplied on demand, further improving the removal effect of stubborn dust. This application solves the problems of poor removal effect on fine / stubborn dust, easy secondary pollution, and insufficient self-cleaning ability of existing dust removal methods. It combines the advantages of high dust removal efficiency, no damage to the screen, convenient operation, and strong scene adaptability, making it suitable for the daily cleaning and maintenance of various LED displays.

[0061] The present application will be further described below with reference to specific embodiments.

[0062] Example 1: Dust Removal Scenario Parameters for Indoor Acrylic Mask LED Display Screen (Dry Fine Dust): The LED display screen is an indoor advertising screen, and the mask material is acrylic (withstand voltage ≤15kV); the dust type is dry fine dust in an office environment (particle size 0.1μm-10μm, viscosity coefficient 0.2); the ambient humidity is 45%RH, and the temperature is 25℃; the dust removal requirements are to efficiently capture fine dust, avoid scratching the acrylic mask, and prevent secondary pollution.

[0063] Equipment parameter adaptation: Electrostatic generator forward output voltage 8kV, current 1μA; reverse output voltage 8kV, current 1μA; switching response time ≤10ms, delay decay time 3s, reverse voltage application time 10s; blowing and suction module automatically matches "electrostatic + vacuuming" mode; micro vacuum pump negative pressure -9kPa; electrostatic dust removal rod conductive dust removal head length 200mm, diameter 10mm; suction channel air inlet surround range 10mm; control parameter: dust adhesion threshold 0.3mg / cm³. 2 The distance between the conductive dust removal head and the screen is 8mm, and the moving speed is 0.4m / s; the washing and mopping module and the cleaning liquid supply module are turned off.

[0064] Workflow: S1: Start the equipment. The power supply module outputs 12V. The microcontroller initializes and loads parameters. The environmental sensor detects humidity at 45%RH and temperature at 25℃. The dust detection module detects dry, fine dust. After all components self-test and pass, the alarm indicator light stays green. S2: The control module automatically switches to "electrostatic + dust collection" mode, sends an 8kV positive voltage command, closes the positive contacts of the dual high-voltage relays, applies an 8kV positive voltage, and starts the micro dust pump (negative pressure -9kPa). The voltage detection unit adjusts in real time, controlling voltage fluctuations within ±0.05kV. S3: The operator moves the electrostatic dust removal rod. The infrared distance sensor detects a flat screen, the distance is stable at 8mm, and the moving speed is 0.4m / s. The positive electrostatic field adsorbs fine dust, the annular dust collection channel captures suspended dust, and it is transported to the dust collection box through a sealed pipe. S4: After 15 minutes of dust collection, the dust detection module detects an accumulated dust level of 0.3mg / cm³. 2 The self-cleaning mode is triggered; the positive voltage is turned off, and after detecting that the residual current is ≤0.01μA, an 8kV reverse voltage is gradually applied (takes 1s), and the blowing and suction module is started (wind speed 3m / s, negative pressure -12kPa); S5: pre-blowing stage (1-3s) loosens the dust, strong repulsion stage (3-15s) full-load reverse voltage +3m / s airflow accelerates the detachment, fine collection stage (15-25s) negative pressure is increased to -18kPa to capture residual dust; if the dust volume in the dust collection box is less than 60%, the compression function is not started; S6: after self-cleaning is completed, the reverse voltage and the blowing and suction module are turned off, and the power supply module is in standby mode; if the dust collection box is not full, the above process can be repeated.

[0065] Example 2: Outdoor Tempered Glass Dome LED Display Screen (Stubborn Sticky Dust) Dust Removal Scenario Parameters: The LED display screen is an outdoor plaza screen, and the dome material is tempered glass (withstanding voltage ≤30kV); the dust type is stubborn sticky dust formed by outdoor dust and rain erosion (particle size 5μm-50μm, viscosity coefficient 0.8); the ambient humidity is 75%RH, and the temperature is 30℃; the dust removal requirements are to break the sticky adhesion between the dust and the screen, efficiently capture stubborn dust, thoroughly self-clean, and adapt to outdoor scenarios without external power supply.

[0066] Equipment parameter compatibility: Electrostatic generator forward output voltage 25kV, current 3μA; reverse output voltage 25kV, current 3μA; switching response time ≤10ms; delay decay time 5s (high humidity environment); reverse voltage application time 30s; the blowing and suction module automatically matches the "electrostatic + blowing + vacuuming + roller washing and mopping + cleaning fluid supply" mode; the mini blower speed is 7.5m / s; the vacuum pump negative pressure is -19kPa; the roller speed is 300rpm; and the cleaning fluid supply flow rate is 0.8mL / min; the electrostatic dust removal rod has a conductive dust removal head length of 400mm and a diameter of 15mm; the blowing channel diameter is 8mm; the angle between the air outlet and the dust removal head is 45°; and the roller length is compatible with the conductive dust removal head; the control parameter is a dust adhesion threshold of 0.8mg / cm³. 2 The conductive dust removal head is 12mm away from the screen and moves at a speed of 0.2m / s.

[0067] Workflow: S1: Power supply module starts (10000mAh lithium battery fully charged), microcontroller initializes, environmental sensor detects humidity 75%RH and temperature 30℃, automatically reduces positive voltage by 20% (adjusted from initial 25kV to 20kV), and extends reverse voltage application time to 30s; dust detection module detects stubborn sticky dust characteristics, alarm indicator light stays green after all components pass self-test; S2: control module automatically switches to "static + blower + vacuum + roller mop + cleaning fluid supply" mode, sends 20kV positive voltage command, dual high voltage relay positive contacts close, apply 20kV positive voltage, and simultaneously starts the blower ( The system includes a 7.5m / s airflow, a vacuum pump (-19kPa), a washing and mopping module (300rpm forward), and a cleaning fluid supply (0.8mL / min). A current detection unit monitors the current in real-time to ensure it does not exceed 3μA. S3: The operator moves the electrostatic dust removal rod; the infrared distance sensor detects a flat screen, maintaining a stable distance of 12mm at a speed of 0.2m / s. A 20kV high-voltage electrostatic field, a 7.5m / s oblique airflow, and cleaning fluid assist in breaking down the sticky dust. The rotating rollers peel off the dust, which is then electrostatically adsorbed and captured by the -19kPa negative pressure. S4: After 30 minutes of dust removal, the dust detection module detects an accumulated dust level of 0.8mg / cm³. 2The self-cleaning mode is triggered; the positive voltage and cleaning fluid supply are turned off, and 5 seconds are waited to ensure the residual static electricity decays. Then, a 25kV reverse voltage is gradually applied (lasting 1 second), and the parameters of the blowing and suction module are adjusted (wind speed 5m / s, negative pressure -16kPa). The washing and mopping module is switched to reverse 400rpm. S5: Pre-blowing stage (1-3s): 3m / s airflow loosens the dust. Strong repulsion stage (3-15s): 25kV reverse voltage + 5m / s airflow + roller reverse acceleration to remove the dust. Fine collection stage (15-30s): negative pressure -18kPa captures suspended dust. When the dust collection box reaches 60% dust, the compression mechanism is activated to compact the dust to 40% of its original volume. S6: After self-cleaning is completed, the reverse voltage, blowing and suction module and washing and mopping module are turned off. If the dust collection box does not reach the overflow threshold after compression, dust removal can continue. If overflow is detected later, the indicator light will flash to prompt replacement.

[0068] Example 3: Dust Removal Scenario Parameters for Outdoor Curved LED Display Screen (Mixed Dust): The LED display screen is an outdoor curved advertising screen, and the mask material is tempered glass (withstanding voltage ≤30kV); the dust type is mixed dust (containing dry fine dust and stubborn sticky dust, particle size 0.5μm-40μm, viscosity coefficient 0.4-0.7); the ambient humidity is 60%RH, and the temperature is 15℃; the dust removal requirement is to adapt to the curved screen body, efficiently remove mixed dust, and avoid secondary pollution.

[0069] Equipment parameter compatibility: Electrostatic generator forward output voltage 22kV, current 2.5μA; reverse output voltage 22kV, current 2.5μA; switching response time ≤10ms, delay decay time 4s, reverse voltage application time 25s; the blowing and suction module automatically matches the "electrostatic + blowing + vacuuming + roller washing and mopping" mode; the mini blower has a wind speed of 6.5m / s, the vacuum pump has a negative pressure of -17kPa, and the roller speed is 280rpm; the electrostatic dust removal rod has a conductive dust removal head with a length of 300mm and a diameter of 12mm; the control parameter is a dust adhesion threshold of 0.5mg / cm³. 2 .

[0070] Workflow: S1: Start the equipment. The power supply module outputs 12V voltage, the microcontroller initializes, the environmental sensor detects humidity of 60%RH and temperature of 15℃, the dust detection module detects mixed dust characteristics, and after all components self-test normally, the alarm indicator light stays green. S2: The control module automatically switches between "static + blowing + vacuuming + roller washing and mopping" modes, sends a 22kV positive voltage command, applies 22kV positive voltage, and starts the blower (6.5m / s), vacuum pump (-17kPa), and washing and mopping module (forward rotation 280rpm). S3: The operator moves the electrostatic dust removal rod. The infrared distance sensor detects the curvature of the screen in real time and dynamically adjusts the distance (maintaining 8mm-15mm). The moving speed adaptively switches between 0.15m / s and 0.3m / s to ensure that there are no dead corners for dust removal on the curved screen. The electrostatic adsorption, airflow breaking, and roller peeling work together to remove mixed dust. S4: After 25 minutes of dust removal, the dust detection module detects that the accumulated dust reaches 0.5mg / cm³. 2 The self-cleaning mode is triggered; the positive voltage is turned off, and after detecting that the residual current is ≤0.01μA, a 22kV reverse voltage is gradually applied (taking 1s), and the parameters of the blowing and suction module are adjusted (wind speed 4m / s, negative pressure -16kPa), and the washing and mopping module is switched to reverse 380rpm; S5: The multi-stage self-cleaning process removes dust from the dust removal head and roller surface. When the dust collection box reaches 50% dust, the compression function is not activated; S6: After self-cleaning is completed, the power supply module is in standby mode and can continue to adapt to the dust removal operation of curved screens.

[0071] Example 4: Self-cleaning mode started independently (manually triggered scenario) Scenario parameters: The application scenario is during the interval of outdoor dust removal operation. The operator finds obvious dust accumulation on the surface of the conductive dust removal head and roller. There is no need to wait for automatic triggering. The self-cleaning is started manually. The current state is: the equipment is in standby state, the dust collection box has sufficient remaining capacity, the last positive output voltage is 25kV, the ambient humidity is 55%RH, and the temperature is 20℃.

[0072] Workflow: S1: Press the start / stop button on the insulated handle to start the power supply module. After initialization, the microcontroller enters standby mode. S2: Press and hold the mode selection button for 3 seconds to trigger the manual self-cleaning mode. The microcontroller sends a reverse voltage command to the electrostatic generator, closing the reverse contacts of the dual high-voltage relays. The polarity conversion circuit outputs a 25kV reverse voltage (gradually increasing, taking 1 second). Simultaneously, the drive unit starts the miniature blower (wind speed 4m / s), the miniature vacuum pump (negative pressure -15kPa), and the washing and mopping module (reverse rotation 400rpm). S3: The reverse electric field repels and removes dust. The airflow acceleration, roller reversal, and negative pressure collection work together. During the process, the current detection unit monitors the circuit current to remain stable at around 2μA. The environmental sensor provides real-time data feedback, requiring no parameter adjustment. S4: After 18 seconds, self-cleaning is complete. The microcontroller shuts off the reverse voltage, the blower / vacuum module, and the washing and mopping module. The power supply module returns to standby mode, and the alarm indicator light stays on green, indicating that dust removal can continue.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electrostatic dust removal device for LED displays, characterized in that: The system includes an electrostatic generator, electrostatic dust removal rods, a dust collection chamber, and a cleaning fluid supply module. The electrostatic dust removal rods are detachably electrically connected to the electrostatic generator. An insulated handle is located at the top of the electrostatic dust removal rod, and a conductive dust removal head is located at the bottom. The conductive dust removal head is connected to the electrostatic generator via a shielded wire. The electrostatic dust removal rod integrates a control module, a power supply module, a blowing / suction module, and a washing / mopping module. An external dust collection interface is located on the electrostatic dust removal rod, and the dust collection chamber is connected to the dust collection interface via a sealed pipe. The power supply module connects to the electrostatic generator, the blowing / suction module of the electrostatic dust removal rod, the washing / mopping module, the control module, and the cleaning fluid supply module. The liquid supply module is electrically connected, and the control module is signal-connected to the electrostatic generator, the blowing and suction module of the electrostatic dust removal rod, the washing and mopping module, and the cleaning liquid supply module, respectively. It is used to control the voltage output direction, output status, and switching sequence of the electrostatic generator, the blowing / dust suction mode switching and start / stop of the blowing and suction module, the start / stop and forward / reverse rotation of the washing and mopping module, and the start / stop and flow rate adjustment of the cleaning liquid supply module. The cleaning liquid supply module is connected to the washing and mopping module through a liquid guide tube. The electrostatic generator has an electrostatic forward / reverse switching function, which is realized by the coordinated control program of the forward / reverse voltage switching unit of the electrostatic generator and the control module.

2. The electrostatic dust removal device for LED displays according to claim 1, characterized in that: The forward / reverse voltage switching unit includes a dual-channel high-voltage relay, a polarity conversion circuit, a voltage stabilization circuit, and an overcurrent protection circuit. The dual-channel high-voltage relay receives digital control signals from the control module. The polarity conversion circuit consists of a high-voltage rectifier bridge, a filter capacitor, and a current-limiting resistor. The high-voltage rectifier bridge converts the DC high voltage from the dual-channel high-voltage relay into a switchable forward / reverse voltage. After filtering by the filter capacitor and protection by the current-limiting resistor, it outputs a stable forward / reverse voltage. The voltage stabilization circuit adjusts the forward / reverse voltage output from the polarity conversion circuit to the set value. The overcurrent protection circuit is connected in series in the high-voltage output circuit. The overcurrent protection circuit includes a high-voltage current sensor and a fast-acting fuse. The current sensor monitors the output current in real time. When the current exceeds the set value, it immediately sends a signal to the control module. The control module triggers the dual-channel high-voltage relay to disconnect, simultaneously cutting off the high-voltage output of the electrostatic generator.

3. The electrostatic dust removal device for LED displays according to claim 2, characterized in that: The logic of the collaborative control program of the control module is as follows: The collaborative control program built into the control module is used to realize the timing control, parameter adjustment and status monitoring of electrostatic forward and reverse switching. The switching timing is preset to the process of "forward output - delay decay - reverse output - reverse shutdown". The delay decay time can be dynamically adjusted according to the material of the LED display and the ambient humidity. Voltage and current feedback signals are collected in real time through the ADC interface, and the PID algorithm is used to adjust the duty cycle of the PWM output to stabilize the forward voltage at the set value ±0.05kV and the current at the set value ±0.01μA. The status monitoring module monitors the relay switching status and voltage and current fluctuations in real time. When abnormalities occur, an alarm is triggered and the high voltage output is cut off.

4. The electrostatic dust removal device for LED displays according to any one of claims 1-3, characterized in that: The control module includes a microcontroller, a voltage detection unit, a current detection unit, a dust detection module, an environmental sensor, an infrared ranging sensor, and a drive unit. The environmental sensor is used to collect ambient humidity and temperature data, the infrared ranging sensor is used to detect the curvature and distance of the screen, the dust detection module includes an infrared dust sensor and an overflow sensor, used to collect dust particle size, viscosity coefficient, and dust collection box overflow status, and the drive unit is used to drive the start and stop of the blowing and suction module, the washing and mopping module, and the cleaning liquid supply module and adjust their operating status.

5. The electrostatic dust removal device for LED displays according to claim 4, characterized in that: The blowing and suction module includes a blowing channel, a suction channel, a mini blower and a mini suction pump. The air outlet of the blowing channel forms an angle of 30° to 60° with the surface of the conductive dust removal head, and the air inlet of the suction channel is arranged around the conductive dust removal head.

6. The electrostatic dust removal device for LED displays according to claim 4, characterized in that: The cleaning fluid supply module includes a miniature storage tank, a miniature peristaltic pump, and a liquid guide tube. The miniature storage tank is used to store antistatic cleaning fluid, and the miniature peristaltic pump delivers the cleaning fluid to the washing and mopping module through the liquid guide tube, with adjustable flow rate.

7. The electrostatic dust removal device for LED displays according to claim 4, characterized in that: The dust collection chamber adopts a sealed structure with a built-in detachable anti-static dust collection box. The anti-static dust collection box has a built-in miniature compression mechanism to compact the dust. The pipe connecting the dust collection chamber and the dust suction channel is made of polytetrafluoroethylene and connected by a silicone sealing joint. Both the overflow sensor and the infrared dust sensor are located inside the anti-static dust collection box.

8. The electrostatic dust removal device for LED displays according to claim 4, characterized in that: The washing and mopping module includes a miniature DC motor and soft anti-static silicone rollers. The rollers have a Shore hardness of 35-45 degrees and are covered with micron-level anti-slip protrusions. They are connected to the electrostatic dust removal rod via quick-release buckles and are driven to rotate forward and backward by the miniature DC motor.

9. A method for electrostatic dust removal from an LED display screen, characterized in that: The method employs the electrostatic washing and dust removal device for LED displays as described in any one of claims 5-8. Includes the following steps: S1: Equipment Start-up and Parameter Initialization; S2: Dust Recognition and Adaptive Mode Matching: The control module collects dust particle size and viscosity data in real time through the dust detection module, and automatically matches the working mode and parameters with environmental data; S3: Dynamic Dust Removal Operation: The operator moves the electrostatic dust removal rod, and the control module dynamically adjusts the distance between the electrostatic dust removal rod and the LED display screen, as well as the moving speed of the electrostatic dust removal rod, through an infrared distance sensor; the conductive dust removal head generates a positive electrostatic field to attract dust, and stubborn / sticky dust is captured by the suction channel after being detached; S4: Self-Cleaning Mode Trigger and Pre-processing: When the dust detection module detects that the dust accumulation on the conductive dust removal head or roller reaches a preset threshold, or when the operator triggers the self-cleaning command, the control module switches to self-cleaning mode; S5: Multi-stage Self-Cleaning and Dust Compression Collection; S6: Work completion and fault self-healing.

10. The method for electrostatic dust removal from an LED display screen according to claim 9, characterized in that: In step S2, the working mode and parameters are automatically matched based on environmental data as follows: when the dust particle size is ≤5μm and the viscosity coefficient is <0.3, the "static + vacuuming" mode is matched, and the washing and mopping module and cleaning liquid supply are turned off; when the dust particle size is >5μm or 0.3≤viscosity coefficient<0.7, the "static + blower + vacuuming + roller washing and mopping" mode is matched, and the cleaning liquid supply is turned off; when the dust viscosity coefficient is ≥0.7, the "static + blower + vacuuming + roller washing and mopping + cleaning liquid supply" mode is matched.

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