Self-adaptive cleaning method suitable for display screen and display system

Abstract

The invention relates to a self-adaptive cleaning method suitable for a display screen and a display system. The self-adaptive cleaning method comprises the steps that S1, a starting instruction is received; s2, controlling a sensor to detect a screen; s3, receiving data detected by the sensor; s4, according to the data detected by the sensor, judging the oil stain type; s5, selecting an adaptive duty ratio to drive a vibration circuit to generate vibration with a corresponding preset hertz value according to the types of the oil stains; s6, after cleaning is completed, the steps S2-S5 are repeated; and S7, sending an ending instruction under the condition that the clean state is judged. Self-adaptive cleaning of the surface of the screen is achieved through the electronic pulse vibration and intelligent detection technology, the screen is cleaned in a liquid-free and consumable-free full-electronic control mode, and the scheme has the advantages of being low in cost, wide in application range and easy and convenient to maintain.

Description

Technical Field

[0001] This application relates to the field of displays, and more specifically to an adaptive cleaning method and display system suitable for displays. Background Technology

[0002] Over time, displays accumulate oil and dust on their surfaces, which users can usually clean manually. However, displays installed in public places, such as serial port displays, are more prone to accumulating oil and dust due to frequent touching. Manual cleaning is not only costly but also difficult to guarantee effective results.

[0003] Currently, existing technologies for cleaning displays installed in public places employ ultrasonic cleaning and chemical self-cleaning coatings. Ultrasonic cleaning removes stains from the screen surface through vibration, but its application is limited in embedded environments due to space constraints and water resource considerations. While coating the screen surface with a self-cleaning chemical coating enables automatic stain removal, these coatings are expensive and require periodic replacement to maintain their effectiveness, increasing long-term operating costs. Therefore, a widely applicable and cost-effective cleaning solution is urgently needed. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0005] On the one hand, this application provides an adaptive cleaning method for displays, the steps of which include:

[0006] S1 received the start command;

[0007] S2 controls the sensor to detect the screen;

[0008] S3 receives data detected by the sensor;

[0009] S4 determines the type of oil stain based on the data detected by the sensor;

[0010] S5 selects an adaptive duty cycle drive vibration circuit to generate vibration with a corresponding predetermined Hertz value based on the type of oil contaminant.

[0011] After cleaning is completed in step S6, repeat steps S2-S5.

[0012] If S7 determines that the environment is clean, it sends an end command.

[0013] In one embodiment, a linkage rod is provided on the handle, the linkage rod is installed in the guide groove, and the linkage rod is pivotally connected to the hook.

[0014] In one embodiment, controlling the sensor to detect the screen includes:

[0015] Control the capacitive touch sensor to detect the area of ​​dirt covering the screen;

[0016] Control the infrared detection sensor to detect the attenuation rate of reflected light from the screen.

[0017] In one embodiment, determining the type of oil stain based on data detected by the sensor includes:

[0018] If the area covered by the stain exceeds the first threshold, an emergency situation is declared.

[0019] If the area covered by the stain is less than the first threshold and the reflectance attenuation rate is greater than or equal to the second threshold, the condition is determined to be heavily soiled.

[0020] If the area covered by the stain is less than the first threshold and the attenuation rate of the reflected light is less than the second threshold, it is judged to be a lightly soiled state.

[0021] If the area covered by the stain is 0, it is considered to be in a clean state.

[0022] In one embodiment, the vibration circuit with an adaptive duty cycle is selected based on the type of oil contaminant to generate vibration with a predetermined Hertz value, including:

[0023] In the event of an emergency, the vibration circuit generates vibration at a value of the first Hertz.

[0024] When the condition is determined to be heavily polluted, the vibration circuit generates vibration at a second Hertz value;

[0025] When the condition is determined to be lightly polluted, the vibration circuit generates vibration at a value of 3 Hertz.

[0026] The first hertz value is greater than the second hertz value, and the second hertz value is greater than the third hertz value.

[0027] In one embodiment, controlling the capacitive touch sensor to detect the area of ​​dirt covering the screen includes:

[0028] Based on the data ΔCapacitance collected by the capacitive touch sensor, the stain coverage area Area is calculated using the formula Area=k×(ΔCapacitance / Baseline);

[0029] Where k is the calibration coefficient and Baseline is the baseline value.

[0030] In one embodiment, after cleaning is completed, steps S2-S5 are repeated, and the method further includes:

[0031] If the judgment result is consistent with the previous judgment result, the drive vibration circuit will generate vibration greater than the corresponding predetermined Hertz value.

[0032] In one embodiment, the steps further include:

[0033] If the results of at least three determinations are consistent, control ends and an error command is sent.

[0034] In one embodiment, if the determination result is consistent with the previous determination result, the vibration circuit is driven to generate vibration greater than the corresponding predetermined Hertz value, including:

[0035] If the judgment result is consistent with the previous judgment result, the drive vibration circuit generates f. p Vibration of +K(n-1);

[0036] Among them, f p The corresponding predetermined Hertz value is given, K is a constant, and n is the number of cleaning cycles.

[0037] On the other hand, this application also provides a display system, comprising:

[0038] LCD module;

[0039] Main control unit;

[0040] Capacitive touch sensor, used to detect the area of ​​dirt covering the LCD module;

[0041] Infrared detection sensor, used to detect the attenuation rate of reflected light from the liquid crystal module;

[0042] The vibration circuit is used to generate vibrations of a predetermined Hertz value to drive the liquid crystal module.

[0043] In one embodiment, it further includes:

[0044] The data transmission module is used to receive external data.

[0045] The storage module stores the data input from the data transmission module and displays the data on the LCD module.

[0046] This application has at least the following beneficial effects:

[0047] In this application, adaptive cleaning of the screen surface is achieved through electronic pulse vibration and intelligent detection technology. The screen is cleaned using a fully electronic control method that is liquid-free and consumable-free. This solution has the advantages of low cost, wide applicability, and easy maintenance. Attached Figure Description

[0048] Figure 1This is a logical schematic diagram of an adaptive cleaning method provided in an embodiment of this application.

[0049] Figure 2 This is a schematic diagram of a display system provided in an embodiment of this application. Detailed Implementation

[0050] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0051] In the description of this application, it should be understood that if terms such as "length", "width", "thickness", "upper", "lower", "vertical", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0052] Furthermore, where the terms "first," "second," and "third" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," and "third" may explicitly or implicitly include at least one of those features. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0054] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] It should be noted that if an element is referred to as being "fixed to," "set on," or "contained on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0056] The embodiments of this application are described in detail below with reference to the accompanying drawings.

[0057] Reference Figure 1 As shown, in some embodiments of this application, an adaptive cleaning method suitable for a display screen is provided, the steps of which include:

[0058] S1 received the start command;

[0059] S2 controls the sensor to detect the screen;

[0060] S3 receives data detected by the sensor;

[0061] S4 determines the type of oil stain based on the data detected by the sensor;

[0062] S5 selects an adaptive duty cycle drive vibration circuit to generate vibration with a corresponding predetermined Hertz value based on the type of oil contaminant.

[0063] After cleaning is completed in step S6, repeat steps S2-S5.

[0064] If S7 determines that the environment is clean, it sends an end command.

[0065] This solution utilizes electronic pulse vibration and intelligent detection technology to achieve adaptive cleaning of the screen surface. Based on sensor detection of screen contamination levels, the vibration circuit is controlled to generate vibrations at a predetermined Hertz value, ensuring the screen vibrates at an appropriate Hertz. Compared to existing ultrasonic cleaning methods with limited application range and the need for periodic replacement of chemical coatings, this solution employs a liquid-free, consumable-free, fully electronic control method for screen cleaning, offering advantages such as low cost, wide applicability, and easy maintenance.

[0066] By using data detected by infrared and capacitive touch sensors, different types of oil stains are identified, and the vibration frequency and duty cycle are dynamically adjusted to achieve adaptive cleaning for different types of oil stains. Compared to fixed-frequency vibration methods, the adaptive cleaning method can adjust vibration parameters in real time according to the area and type of stain coverage to ensure optimal cleaning results.

[0067] The predetermined Hertz value can be understood as multiple different PWM signals preset in advance. According to different types of oil stains, the corresponding PWM signal is called, and the vibration circuit is controlled by the PWM signal to generate appropriate vibration. At this time, the Hertz value of the vibration generated by the vibration circuit is the predetermined Hertz value.

[0068] Furthermore, the steps of this adaptive cleaning method specifically include:

[0069] S1 received the start command;

[0070] S2 controls the capacitive touch sensor to detect the area of ​​dirt covering the screen and the infrared sensor to detect the attenuation rate of the screen's reflective rays.

[0071] S3 receives data detected by the capacitive touch sensor and the infrared detection sensor;

[0072] If the area covered by the S4 stain exceeds the first threshold, an emergency situation is identified.

[0073] If the area covered by the stain is less than the first threshold and the reflectance attenuation rate is greater than or equal to the second threshold, the condition is determined to be heavily soiled.

[0074] If the area covered by the stain is less than the first threshold and the attenuation rate of the reflected light is less than the second threshold, it is judged to be a lightly soiled state.

[0075] If the area covered by the stain is 0, it is considered to be in a clean state;

[0076] When S5 determines that an emergency is in effect, the vibration circuit generates vibration at the first Hertz value.

[0077] When the condition is determined to be heavily polluted, the vibration circuit generates vibration at a second Hertz value;

[0078] When the condition is determined to be lightly polluted, the vibration circuit generates vibration at a value of 3 Hertz.

[0079] After cleaning is completed in step S6, repeat steps S2-S5.

[0080] If S7 determines that the environment is clean, it sends an end command.

[0081] The first hertz value is greater than the second hertz value, and the second hertz value is greater than the third hertz value.

[0082] In this solution, steps S2-S4 are specifically as follows:

[0083] First, control the capacitive touch sensor to detect the area of ​​dirt covering the screen, receive the area of ​​dirt covering detected by the capacitive touch sensor, and compare the detected area of ​​dirt covering with a first threshold:

[0084] If the area covered by the stain is greater than the first threshold, the vibration circuit generates a vibration of the first Hertz value; if the area covered by the stain is 0, the action ends.

[0085] Otherwise, the infrared detection sensor detects the attenuation rate of the screen's reflection. If the attenuation rate is greater than or equal to the second threshold, the vibration circuit generates vibration at the second Hertz value; if the attenuation rate is less than the second threshold, the vibration circuit generates vibration at the third Hertz value.

[0086] This solution uses multi-sensor fusion technology to dynamically adjust the vibration frequency and duty cycle, enabling adaptive cleaning for stains of different degrees. This adaptive cleaning method can adjust vibration parameters in real time according to the stain coverage area and type to ensure the best cleaning effect.

[0087] For example, the steps of an adaptive cleaning method include:

[0088] Upon receiving the start command, the method is activated.

[0089] The capacitive touch sensor is controlled to detect the area of ​​dirt covering the screen, the area of ​​dirt covering detected by the capacitive touch sensor is received, and the detected area of ​​dirt covering is compared with a first threshold.

[0090] If the stain covers an area greater than 30%, the screen is deemed to be in an emergency state, and the vibration circuit is controlled to generate a high-frequency vibration of 800Hz.

[0091] If the area covered by the stain is 0, the screen is considered clean.

[0092] If the stain coverage area Area is greater than 0 and less than or equal to 30%, control the infrared detection sensor to detect the attenuation rate of the reflected line on the screen.

[0093] If the attenuation rate of the reflected light is greater than or equal to 30%, the screen is determined to be heavily contaminated, and the vibration circuit generates a 500Hz mid-frequency vibration.

[0094] If the attenuation rate of the reflected light is less than 30%, the screen is determined to be slightly dirty, and the vibration circuit generates a low-frequency vibration of 200Hz.

[0095] Repeat the above steps after each cleaning cycle.

[0096] If the environment is determined to be clean, send an end command.

[0097] Furthermore, controlling the capacitive touch sensor to detect the area of ​​dirt covering the screen includes: calculating the area of ​​dirt covering, Area, using a formula based on the data ΔCapacitance collected by the capacitive touch sensor.

[0098] The formula for calculating the area covered by the stain is:

[0099] Area=k×(ΔCapacitance / Baseline)

[0100] Where k is a calibration coefficient, used to quantify the proportional relationship between capacitance change and oil stain area.

[0101] Baseline is the baseline value, which is the system's preset capacitance reference value when there is no oil contamination, and is used as a reference for judging oil contamination coverage.

[0102] In some embodiments of this application, after cleaning is completed, steps S2-S5 are repeated, and the method further includes:

[0103] If the judgment result is consistent with the previous judgment result, the drive vibration circuit will generate vibration greater than the corresponding predetermined Hertz value.

[0104] Furthermore, the steps of this adaptive cleaning method specifically include:

[0105] S1 received the start command;

[0106] S2 controls the capacitive touch sensor to detect the area of ​​dirt covering the screen and the infrared sensor to detect the attenuation rate of the screen's reflective rays.

[0107] S3 receives data detected by the capacitive touch sensor and the infrared detection sensor;

[0108] If the area covered by the S4 stain exceeds the first threshold, an emergency situation is identified.

[0109] If the area covered by the stain is less than the first threshold and the reflectance attenuation rate is greater than or equal to the second threshold, the condition is determined to be heavily soiled.

[0110] If the area covered by the stain is less than the first threshold and the attenuation rate of the reflected light is less than the second threshold, it is judged to be a lightly soiled state.

[0111] If the area covered by the stain is 0, it is considered to be in a clean state;

[0112] When S5 determines that an emergency is in effect, the vibration circuit generates vibration at the first Hertz value.

[0113] When the condition is determined to be heavily polluted, the vibration circuit generates vibration at a second Hertz value;

[0114] When the condition is determined to be lightly polluted, the vibration circuit generates vibration at a value of 3 Hertz.

[0115] After S6 completes cleaning, it controls the capacitive touch sensor to detect the area of ​​dirt covering the screen and the infrared sensor to detect the screen's reflectivity attenuation rate. Based on the dirt coverage area and reflectivity attenuation rate, it determines the type of oil stain. It compares the type of oil stain this time with the type of oil stain from the previous time and selects the appropriate duty cycle to drive the vibration circuit to generate vibration with a predetermined Hertz value.

[0116] If the type of oil stain this time is different from the type of oil stain in the previous time, return to step S5;

[0117] If the type of oil spill is different from the previous type, the drive vibration circuit will generate a vibration greater than the corresponding predetermined Hertz value.

[0118] If S7 determines that the environment is clean, it sends an end command.

[0119] Specifically, if the type of oil contamination in the current instance differs from the type in the previous instance, the vibration circuit is driven to generate a vibration greater than a predetermined Hertz value. p Vibration of +K(n-1);

[0120] Among them, f p The corresponding predetermined Hertz value is given, K is a constant, and n is the number of cleaning cycles.

[0121] Furthermore, the adaptive cleaning method also includes the following steps:

[0122] If the results of at least three determinations are consistent, control ends and an error command is sent.

[0123] If at least three determinations are consistent, the stain can be considered difficult to remove by vibration. To avoid the vibration circuit from vibrating ineffectively for an extended period, and more importantly, to prevent damage to components as the vibration frequency gradually increases, the vibration circuit is controlled to stop working and issue an error signal after determining that the stain is difficult to remove, so that subsequent operators can check on-site.

[0124] In some embodiments of this application, reference is made to Figure 2 As shown, this application also provides a display system, including: a main control unit, a liquid crystal module, a capacitive touch sensor, an infrared detection sensor, a vibration circuit, and a storage module. The main control unit is electrically connected to the liquid crystal module, the capacitive touch sensor, the infrared detection sensor, the vibration circuit, and the storage module.

[0125] The main control unit is the core control unit, responsible for implementing algorithm logic and circuit control. It includes a microcontroller (MCU) and its peripheral circuitry, enabling powerful data processing capabilities and flexible I / O control. The main control unit connects to the storage module via SPI / IIC interfaces, to the LCD module via parallel / serial interfaces, and to the vibration circuit via PWM signal lines. It also supports multiple communication protocols for data exchange and command transmission with external devices.

[0126] A capacitive touch sensor comprises one or more sets of electrodes arranged on or near the surface of a liquid crystal module. When oil adheres to the screen surface, it changes the electric field distribution between the electrodes and the screen, thereby causing a change in capacitance. The internal circuitry of the sensor converts this capacitance change into a measurable electrical signal. A capacitive touch sensor is a sensor that detects the approach or touch of an object based on capacitance changes. In this scheme, a capacitive touch sensor is used to detect oil on the surface of a liquid crystal module. Stains are detected by measuring the capacitance change between the electrodes and the surface of the liquid crystal module. When stains adhere to the surface of the liquid crystal module, they change the dielectric constant between the electrodes and the liquid crystal module, thereby causing a change in capacitance. The capacitive touch sensor converts this capacitance change into an electrical signal. The capacitive touch sensor (2) acquires the original capacitance value ΔCapacitance between the screen surface and the electrodes in real time, and uses the formula Area = k × (ΔCapacitance / Baseline) for the main control unit to calculate the stain coverage area. Where k is the calibration coefficient and Baseline is the baseline value.

[0127] An infrared detection sensor consists of an infrared emitter and an infrared receiver. The emitter emits infrared light, and the receiver receives the light reflected from the surface of the LCD module, converting the light signal into an electrical signal for processing by the main control unit to obtain the intensity of the reflected light from the screen surface. The infrared detection sensor is a non-contact sensor that detects the intensity of reflected light from the LCD module surface by emitting and receiving infrared light. It also monitors the state of dirt on the LCD module surface in real time. When dirt adheres to the LCD module surface, it changes the intensity of the reflected light; the infrared detection sensor identifies the presence and extent of the dirt by detecting this change.

[0128] The vibration circuit comprises one or more vibration motors and a drive circuit for controlling the motor vibration. The main control unit controls the speed and intensity of the vibration motors via PWM (Pulse Width Modulation) signals. The vibration circuit is the core component in the display system for generating mechanical vibration; its main function is to remove stains from the surface of the LCD module through vibration. According to the instructions of the main control unit, the vibration circuit generates vibrations of different frequencies and intensities to adapt to different types of stains and cleaning needs. Low-frequency vibration is used for light stains, while medium- and high-frequency vibrations are used for heavy stains or emergencies, ensuring cleaning effectiveness while protecting the hardware from damage.

[0129] The storage module stores program instructions, and the main control unit can run the program instructions in the storage module to implement the adaptive cleaning method of the above embodiment.

[0130] Thanks to the selection of low-cost MCUs, capacitive touch sensors, infrared detection sensors, and vibration circuits, the type of oil stains on the LCD module is determined by the capacitive touch sensor and infrared detection sensor, and the vibration frequency is dynamically adjusted to clean the LCD module. At the same time, the overall cost is effectively controlled.

[0131] Furthermore, the display system also includes a data transmission module. This module receives external data, which can be images. Downloaded images can be stored in the storage module and displayed on the LCD module. Specifically, the storage module uses a NOR Flash chip and connects to the main control module via an SPI / IIC interface. It is physically divided into an "existing image area" (storing historical fixed images), a "new image cache area" (temporarily storing image fragments during transmission), and a "new image storage area" (storing updated images). These three partitions have independent addresses to prevent overwriting existing images during updates. The data transmission module can be a wireless module and / or a wired communication interface. The wireless module integrates a Bluetooth / Wi-Fi chip to download image data wirelessly. The display system can also download images via a wired communication interface, including a standard UART serial port (baud rate support 9600-256000bps), which connects to the main control module and serves as an interface for user command interaction.

[0132] The LCD module includes a display panel and a display driver chip. The display panel and the display driver chip are closely connected through multiple sets of data transmission lines and control lines, which are responsible for transmitting image data, control signals, and other information between them. The display driver chip establishes a connection with the main control module through specific communication interface lines (parallel interface / serial interface) to realize data interaction and command transmission with the main control module.

[0133] It is understood that the main control unit in this scheme can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The controller here can refer to one or more devices, circuits, and / or processing cores used to process data (e.g., computer program instructions).

[0134] The storage module can be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed discs, laser discs, optical discs, universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited to these. The storage module can exist independently or can be integrated into the main control unit.

[0135] Furthermore, the display system also includes an audio prompt circuit. The audio prompt circuit includes an audio output element and an audio control chip. In this solution, the audio output element can be a speaker or a buzzer, and the audio control chip is connected to the audio output element via electrical connection lines, while simultaneously being connected to the main control module via signal lines.

[0136] The main control module generates corresponding audio control commands based on the product's operating status and user operations, and sends these commands to the audio control chip via signal lines. Upon receiving the commands, the audio control chip parses and processes them, then generates an electrical signal suitable for the audio sound-generating element, which is transmitted to the element via electrical connection lines. The audio sound-generating element receives the electrical signal, converts it into a sound signal, and plays it, thus completing the entire audio prompt process. Throughout this process, all components work closely together to ensure the accurate and stable implementation of the audio prompt function. Even when the main control unit sends an error command, the audio prompt circuit can still emit a prompt tone.

[0137] Understandably, the main control unit, while sending error commands, includes, but is not limited to, issuing audible alerts to notify the user of errors. The main control unit can also send error commands to the user's terminal device so that the user can quickly obtain information about system errors.

[0138] This display system supports both wired and wireless image downloads and displays images on any area of ​​the LCD module. It also provides audio prompts, greatly enhancing the user experience. Through the coordinated operation of the wireless module, wired communication interface, storage module, LCD module, and audio prompt circuitry, it offers users diverse interaction methods.

[0139] The above embodiments are used to further illustrate this application, but do not limit this application to these specific implementations. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be understood as falling within the protection scope of this application.

Claims

1. A method of adaptive cleaning suitable for a display screen, characterized in that, The steps include: S1 receives a start instruction; S2 controls the sensor to detect the screen; S3 receives the data detected by the sensor; S4 determines the type of oil stain according to the data detected by the sensor; S5 selects a suitable duty cycle to drive the vibration circuit to generate a vibration of a corresponding predetermined hertz value according to the type of oil stain; S6 repeats steps S2-S5 after cleaning is completed; S7 sends an end instruction in the case of determining a clean state.

2. The self-cleaning method according to claim 1, characterized in that, The control of the sensor to detect the screen includes: Controlling the capacitive touch sensor to detect the stain coverage area of the screen; Controlling the infrared detection sensor to detect the reflection line attenuation rate of the screen.

3. The self-cleaning method according to claim 2, characterized in that, The determination of the type of oil stain according to the data detected by the sensor includes: In the case of the stain coverage area being greater than a first threshold value, determining an emergency state; In the case of the stain coverage area being less than the first threshold value and the reflection line attenuation rate being greater than or equal to a second threshold value, determining a heavy pollution state; In the case of the stain coverage area being less than the first threshold value and the reflection line attenuation rate being less than the second threshold value, determining a light pollution state; In the case of the stain coverage area being 0, determining a clean state.

4. The self-cleaning method according to claim 3, characterized in that, The selection of a suitable duty cycle to drive the vibration circuit to generate a vibration of a corresponding predetermined hertz value according to the type of oil stain includes: In the case of determining an emergency state, the vibration circuit generates a vibration of a first hertz value; In the case of determining a heavy pollution state, the vibration circuit generates a vibration of a second hertz value; In the case of determining a light pollution state, the vibration circuit generates a vibration of a third hertz value; Wherein, the first hertz value is greater than the second hertz value, and the second hertz value is greater than the third hertz value.

5. The self-cleaning method of claim 2, wherein, The control of the capacitive touch sensor to detect the stain coverage area of the screen includes: According to the data ΔCapacitance collected by the capacitive touch sensor, the stain coverage area Area is calculated by the formula Area=k×(ΔCapacitance / Baseline); Wherein, k is a calibration coefficient, and Baseline is a baseline value.

6. The self-cleaning method of claim 1, wherein, After cleaning is completed, repeating steps S2-S5 also includes: If the determination result is consistent with the last determination result, driving the vibration circuit to generate a vibration greater than the corresponding predetermined hertz value.

7. The self-cleaning method according to claim 6, characterized in that, The steps also include: If the determination results of at least three times are consistent, controlling the end and sending an error instruction.

8. The self-cleaning method according to claim 6, characterized in that, If the determination result is consistent with the last determination result, driving the vibration circuit to generate a vibration greater than the corresponding predetermined hertz value, including: In the case where the determination result is consistent with the previous determination result, the vibration circuit is driven to generate vibrations at f p + K(n-1) where f p is a corresponding predetermined hertz value, K is a constant value, and n is the number of cleanings.

9. A display system characterized by, Including: A liquid crystal module; A main control unit; A capacitive touch sensor for detecting the stain coverage area of the liquid crystal module; An infrared detection sensor for detecting the reflection line attenuation rate of the liquid crystal module; A vibration circuit for generating a vibration of a corresponding predetermined hertz value to drive the liquid crystal module.

10. The display system of claim 9, wherein, Also including: A data transmission module for receiving external data; A storage module for storing the data input by the data transmission module and displaying the data on the liquid crystal module.

Images