A door curtain light control system

Abstract

The utility model relates to door curtain lamp control technical field discloses a door curtain lamp control system, including user interactive module, main control module, LED lamp drive module, power module, protection module and communication isolation module, user interactive module and communication isolation module two way signal connection, communication isolation module and main control module two way signal connection, main control module and LED lamp drive module two way signal connection, LED lamp drive module and power module electric connection, be provided with standby power supply in the power module, power module and main control module two way electric connection, power module and protection module signal connection, protection module and main control module two way signal connection. In the utility model, through this systematized layered design and isolation mechanism, door curtain lamp system has realized the efficient control and stable operation of door curtain lamp under the low -cost frame, and gives consideration to performance, cost and reliability, satisfies the diversified application demand.

Description

Technical Field

[0001] This utility model relates to the field of door curtain light control technology, and in particular to a door curtain light control system. Background Technology

[0002] With the development of IoT and wireless communication technologies, Wi-Fi / Bluetooth-based smart lighting systems are becoming increasingly popular. These systems offer diverse lighting effects, such as adjustable color, brightness, and flashing modes, creating unique visual experiences. However, existing solutions still fall short in terms of low-cost dynamic display, multi-level security protection, and modular design, making it difficult to meet the needs of homes and commercial spaces for low-cost, easy-to-deploy, and customizable dynamic lighting effects. Therefore, there is a need to develop a curtain light control system. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a door curtain light control system, which aims to improve the existing technology in terms of low-cost dynamic display, multi-level safety protection and modular design, and to meet the needs of families and commercial venues for low-cost, easy-to-deploy and customizable dynamic lighting effects.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a door curtain light control system, comprising a user interaction module, a main control module, an LED light driver module, a power supply module, a protection module, and a communication isolation module. The user interaction module is bidirectionally connected to the communication isolation module, the communication isolation module is bidirectionally connected to the main control module, the main control module is bidirectionally connected to the LED light driver module, the LED light driver module is electrically connected to the power supply module, the power supply module is equipped with a backup power supply, the power supply module is bidirectionally electrically connected to the main control module, the power supply module is signal-connected to the protection module, and the protection module is bidirectionally connected to the main control module.

[0005] Through the above technical solution: the user interaction module facilitates user operation, the main control module quickly processes instructions, and the LED light driver module executes them precisely, achieving diverse lighting effects to meet the needs of different scenarios. For example, users can set the light flashing frequency through a mobile APP (user interaction module), and the main control module will process the instructions and drive the LED to flash as required. The communication isolation module and protection module work together to reduce the impact of external interference and internal anomalies on the system, reduce the probability of failure, and extend the service life.

[0006] As a further description of the above technical solution: The power module includes an AC-DC conversion unit, a rectifier and filter circuit, and a secondary voltage regulator circuit, which are connected in series.

[0007] Through the above technical solutions: the isolation design of the AC-DC unit provides basic safety protection, the rectification and filtering reduce ripple to reduce the burden on the subsequent voltage regulation, and the secondary voltage regulation selects an efficient topology according to the load requirements, thereby improving the overall efficiency by 10% to 20%. Thus, the isolation design, filtering protection, and voltage regulation redundancy together form the foundation of the power supply system's reliability.

[0008] As a further description of the above technical solution: The LED driving module includes a dot matrix composed of multiple independent LED strings, a constant current driving circuit, and a scanning driving circuit. The multiple LED strings are connected in parallel to form a dot matrix, and each column is composed of multiple LEDs connected in series.

[0009] The above technical solution, which adopts a design of multiple independent LED string dot matrix combined with constant current and scanning drive circuits, is the core of realizing low-cost dynamic display of curtain lights. Through the coordinated work of each part, from hardware architecture to drive logic, a balance between display effect and cost control is achieved. Constant current drive reduces LED loss, and scanning drive reduces chip heat generation, resulting in an overall power consumption reduction of 30%, making it suitable for long-term continuous operation.

[0010] As a further description of the above technical solution: The main control module includes an ESP32 chip and a PWM output drive circuit. In the PWM output drive circuit, a Zener diode is connected in parallel between the drain and gate of the MOSFET. The cathode of the Zener diode is connected to the gate of the MOSFET, and the anode is connected to the drain of the MOSFET. This is used to prevent voltage spikes during switching from damaging the MOSFET. In the PWM output drive circuit, a current-limiting resistor is connected in series with the gate of the MOSFET to avoid excessive current. In the PWM output drive circuit, a pull-down resistor is connected in parallel between the gate and source of the MOSFET to ensure reliable turn-off when power is off.

[0011] Through the above technical solution, the collaborative design of the ESP32 chip, PWM output drive circuit and auxiliary components in the main control module ensures the efficient operation of the system. The combination of PWM and MOSFET achieves millisecond-level response of LED brightness and switching, dynamic pattern switching delay <50ms, and no visual stuttering.

[0012] As a further description of the above technical solution: The GPIO pins of the ESP32 chip generate PWM control signals that are connected to the PWM output drive circuit.

[0013] Through the above technical solution: the PWM signal output by GPIO needs to be amplified and electrically isolated before it can drive the LED string. When there are many curtain light strings and they are widely distributed, isolation can avoid current noise caused by the ground potential difference of different light strings, ensure the purity of the PWM signal, and adjust the average operating current of the LED by changing the duty cycle of the PWM signal (0%~100%) to achieve a gradual change in brightness (such as from dark to bright).

[0014] As a further description of the above technical solution: The protection module includes an overcurrent protection circuit, an overvoltage protection circuit, and a temperature protection circuit. The overcurrent protection circuit, overvoltage protection circuit, and temperature protection circuit work together in a hierarchical manner to form a multi-level protection system.

[0015] The above technical solutions—overcurrent protection prioritizes hardware-based rapid disconnection (μs-level response), overvoltage protection dynamically adjusts power supply parameters, and temperature protection triggers heat dissipation or power reduction strategies—ensure system safety while maximizing display continuity and reducing overall costs.

[0016] As a further description of the above technical solution: The communication isolation module includes a transformer, a signal processing and driving circuit, and an RC filter circuit.

[0017] Through the above technical solution, the communication isolation module can effectively ensure the reliable transmission of PWM signals, while isolating strong electrical interference, providing a stable foundation for the dynamic display of the curtain light.

[0018] As a further description of the above technical solution: The RC filter circuit consists of a resistor R1 and a capacitor C1 connected in series. The two ends of the RC filter circuit are connected in parallel to the primary input terminal of the transformer. The signal processing and driving circuit, the RC filter circuit, and the primary coil of the transformer are all connected in series in the signal transmission path.

[0019] Through the above technical solutions, the signal processing and driving circuit can enhance the signal strength, the RC filter optimizes the waveform, and the transformer achieves electrical isolation. Moreover, this low-cost and high-reliability design perfectly meets the dual requirements of "low cost and high stability" for the curtain light system.

[0020] This utility model has the following beneficial effects: 1. In this utility model, through this systematic layered design and isolation mechanism, the curtain light system achieves efficient control and stable operation of the curtain light under a low-cost framework, taking into account performance, cost and reliability, and meeting diverse application needs.

[0021] 2. In this utility model, the connection and collaborative work between the modules realizes a low-cost dynamic display effect for the door curtain light, while ensuring stable and reliable system operation, and providing a good user interaction experience and anomaly protection capabilities. Attached Figure Description

[0022] Figure 1 This is a schematic block diagram of a door curtain light control system proposed in this utility model. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figure 1 The present invention provides an embodiment of a door curtain light control system, comprising a user interaction module, a main control module, an LED light driver module, a power supply module, a protection module, and a communication isolation module. The user interaction module and the communication isolation module are bidirectionally connected, the communication isolation module and the main control module are bidirectionally connected, the main control module and the LED light driver module are bidirectionally connected, the LED light driver module and the power supply module are electrically connected, the power supply module is provided with a backup power supply, the power supply module and the main control module are bidirectionally electrically connected, the power supply module and the protection module are signal connected, and the protection module and the main control module are bidirectionally connected. Specifically, control commands such as displaying patterns and text are sent through a user interaction module (e.g., a mobile app, a touchscreen). A communication isolation module disconnects the electrical connection between the interaction module and the backend circuitry, preventing electrostatic discharge (ESD) and electromagnetic interference (EMI) from the user side from entering the main control system. Furthermore, when the user interaction module communicates via Wi-Fi / Bluetooth, the isolation module protects the main control module from external electromagnetic interference, improving human-machine interaction safety, facilitating user monitoring of operational status, and enabling two-way human-machine interaction. The main control module then sends execution commands through the isolated signal link. The communication isolation module also blocks power ripple and ground loop interference from the main control module from affecting the front-end signal. To mitigate the impact of data transmission errors, the communication isolation module receives control commands from the main control module via a bidirectional connection and transmits them to the user interaction module through isolated transmission (such as Bluetooth or Wi-Fi signals). The PWM control signal output by the main control module adjusts the drive current and lighting sequence of the LED driver module, thereby achieving dynamic pattern display. The LED driver module can then feed back its operating status to the main control module for timely handling of anomalies. A stable power supply from the power module ensures the LED driver module operates normally, meeting the high brightness and long-term operation requirements of the curtain light. The backup power supply in the module is designed to ensure that the LED lights remain lit briefly or continuously when the main power supply fails, especially for scenarios such as commercial displays or holiday decorations where continuous operation is required for extended periods. This prevents interruptions to the dynamic pattern / text display and ensures the integrity of the display effect. Supercapacitors are prioritized as backup power, requiring only a few yuan in cost to provide temporary power to the main control module during power outages (for data preservation). This also prevents damage to the LED lights due to voltage fluctuations, offering high cost-effectiveness. The power module provides a stable voltage to the main control module, while the main control module adjusts the power module's output via PWM signals (e.g., dynamically adjusting the voltage to adapt to load changes). To optimize energy efficiency, when the system is connected to a backup power supply, the main control module can control the power supply module to switch between primary and backup power supply paths to ensure continuous system operation. The protection module sends fault signals such as overcurrent, overvoltage, and overtemperature to the main control module. Upon receiving the signals, the main control module takes actions such as turning off LED lights and triggering alarms. Through a bidirectional connection, the main control module can also send control commands to the protection module to adjust parameters such as protection thresholds. The power supply module transmits voltage, current, and temperature data to the protection module for real-time monitoring. When abnormal conditions such as overvoltage, overcurrent, or excessive temperature are detected, the protection module sends a signal to the main control module to cut off or adjust the power supply to prevent equipment damage.

[0025] Reference Figure 1 The power module includes an AC-DC conversion unit, a rectifier and filter circuit, and a secondary voltage regulator circuit, which are connected in series. Specifically, the AC-DC conversion unit converts the input alternating current (such as 220V / 50Hz AC mains power) into direct current, completing the basic energy conversion. The rectifier and filter circuit performs secondary rectification and filtering on the pulsating direct current after AC-DC conversion, reducing voltage ripple and outputting a smoother direct current voltage. The secondary voltage regulator circuit further regulates the rectified and filtered direct current voltage, outputting a high-precision, low-fluctuation target voltage to adapt to different load requirements. Through the series design of the AC-DC conversion unit, rectifier and filter circuit, and secondary voltage regulator circuit in the power module, the complete conversion from alternating current to high-precision direct current is achieved, meeting the power supply requirements of electronic equipment.

[0026] Reference Figure 1 The LED driver module includes a dot matrix composed of multiple independent LED strings, a constant current driving circuit, and a scanning driving circuit. The multiple LED strings are connected in parallel to form a dot matrix, and each column is composed of multiple LEDs connected in series. Specifically, a pixel matrix is ​​formed by connecting multiple rows of LED strings in parallel and single rows of LEDs in series, serving as a display carrier for dynamic patterns and text. The principle is that each row of LED strings corresponds to one row of pixels in the matrix. LEDs in a single row are connected in series to adapt to high-voltage driving, and multiple rows are connected in parallel to expand the horizontal display width. For example, 8 rows × 16 LEDs can form an 8×16 pixel matrix, meeting the basic text display requirements. A constant current driving circuit can provide a constant current to each row of LED strings, avoiding uneven brightness caused by voltage fluctuations or differences in LED parameters. In addition, constant current driving can reduce LED losses, and scanning driving reduces chip heat generation, resulting in an overall power consumption reduction of 30%, making it suitable for long-term continuous operation. The scanning driving circuit uses a time-division scanning method to light up the LED strings column by column, utilizing the persistence of vision effect of the human eye (about 0.1 seconds) to achieve full-screen display, reducing the number of driving chips. The principle is that the scanning driving chip (such as the 74HC595 shift register) selects the anode of each row of LEDs sequentially at a high frequency (such as 100Hz), while the cathode current is controlled by a constant current circuit to quickly switch and light up different columns.

[0027] Reference Figure 1 The main control module includes an ESP32 chip and a PWM output drive circuit. In the PWM output drive circuit, a Zener diode is connected in parallel between the drain and gate of the MOSFET. The cathode of the Zener diode is connected to the gate of the MOSFET, and the anode is connected to the drain of the MOSFET. This is to prevent voltage spikes during switching from damaging the MOSFET. In the PWM output drive circuit, a current-limiting resistor is connected in series with the gate of the MOSFET to avoid excessive current. In the PWM output drive circuit, a pull-down resistor is connected in parallel between the gate and source of the MOSFET to ensure reliable turn-off when power is off. Specifically, the ESP32 chip in the main control module serves as the core controller, responsible for parsing APP commands, generating PWM control signals, and coordinating the work of various modules. The ESP32 chip (priced at approximately 5-8 RMB) with integrated communication functions replaces the independent Bluetooth / Wi-Fi module, reducing hardware costs by over 30%. The MOSFET, a core component of the PWM output drive circuit, converts the PWM signal generated by the ESP32 into a power signal capable of driving the LED string. The MOSFET's fast turn-on / turn-off characteristics allow for precise high-frequency PWM modulation (typically 1kHz-20kHz), preventing LED flicker. A Zener diode absorbs voltage spikes generated during MOSFET switching (such as back EMF from an inductive load during turn-off), protecting the MOSFET from breakdown. A current-limiting resistor limits the current flowing into the MOSFET gate, preventing excessive drive signal damage due to overcurrent. A pull-down resistor suppresses environmental noise, preventing MOSFET gate mis-conduction due to noise when floating, which could cause abnormally dim LEDs.

[0028] Reference Figure 1 The GPIO pins of the ESP32 chip generate PWM control signals that are connected to the PWM output drive circuit. Specifically, by utilizing the ESP32's built-in dual-core processor and Wi-Fi / Bluetooth communication capabilities, it receives pattern and text display commands sent by the APP, and then outputs high-precision PWM signals (such as 1kHz frequency and adjustable duty cycle) through GPIO pins to control the brightness and switching sequence of LED lights. By designing a reasonable PWM output drive circuit, the ESP32's GPIO signals can efficiently and safely drive MOSFETs, ultimately achieving dynamic display control of the curtain light while ensuring system reliability and low-cost advantages.

[0029] Reference Figure 1 The protection module includes overcurrent protection circuit, overvoltage protection circuit and temperature protection circuit. The overcurrent protection circuit, overvoltage protection circuit and temperature protection circuit work together in a hierarchical manner to form a multi-level protection system. Specifically, the overcurrent protection circuit can monitor the circuit current in real time and quickly cut off the power supply when the current exceeds the threshold, preventing the LED string from burning out due to short circuit or overload. Compared with traditional fuses, it can be repeatedly triggered and reused, reducing maintenance costs. The overvoltage protection circuit can suppress power supply voltage spikes (e.g., >15V), protecting downstream circuits from high voltage surges and protecting low-voltage chips such as ESP32. The voltage clamping accuracy reaches ±5%, ensuring that the LEDs operate within a safe voltage range (e.g., 12V±0.6V). The temperature protection circuit can monitor the temperature of key components and automatically reduce the load or cut off the power when overheating, avoiding transformer insulation aging caused by high temperature and maintaining stable operation of the system in high-temperature environments (e.g., 40℃), with brightness fluctuation <10%. Through the hierarchical and coordinated operation of these three circuits, the probability of false triggering can be reduced (e.g., instantaneous surges only trigger overvoltage protection without cutting off the power supply), and the fault recovery time can be shortened by 80%.

[0030] Reference Figure 1 The communication isolation module includes a transformer, a signal processing and driving circuit, and an RC filter circuit. The RC filter circuit consists of a resistor R1 and a capacitor C1 connected in series. The two ends of the RC filter circuit are connected in parallel to the primary input of the transformer. The signal processing and driving circuit, the RC filter circuit, and the primary coil of the transformer are all connected in series in the signal transmission path. Specifically, transformer isolation can disconnect the electrical connection between digital ground (ESP32 side) and power ground (LED driver side), preventing interference from propagating through ground loops and preventing electric shock risks to users due to LED string leakage (leakage current <1mA). By connecting an RC filter circuit in parallel to the primary input of the transformer, high-frequency interference (such as 100kHz ripple generated by switching power supplies) can be filtered out, reducing EMI radiation, improving the quality of the transformer primary signal, and controlling the signal rise / fall time to within 500ns to avoid MOSFET false triggering. Through signal processing and amplification circuits, the control signal can be amplified and shaped, enhancing the driving capability and adapting to the transformer input characteristics, making the transmission delay <200ns, ensuring no significant delay in dynamic display.

[0031] Working Principle: First, the display commands sent via the APP are transmitted to the communication isolation module through the user interaction module. The user interaction module receives system status feedback and displays the system status. When the user interaction module communicates via Wi-Fi / Bluetooth, the signal processing and drive circuit in the communication isolation module shapes and amplifies the control signal. Then, an RC filter circuit consisting of resistor R1 and capacitor C1 in series filters out high-frequency noise before driving the transformer for electrical isolation. When a voltage spike occurs on the primary side of the transformer, capacitor C1 charges rapidly, and resistor R1 limits the charging current to prevent the voltage spike from damaging the drive circuit, thus protecting the user interaction device. Finally, the signal processing circuit shapes and converts the signal into a system-acceptable signal format. By using transformer isolation and RC filtering instead of expensive digital isolation chips, the cost per channel is reduced by 40%. The isolated signal is then transmitted to the main control module. The communication isolation module protects the main control module from external electromagnetic interference. The ESP32 chip in the main control module generates multiple PWM signals, and the LED driver module drives the LED dot matrix display to show patterns or text based on these PWM signals. Furthermore, the scanning drive circuit can refresh the screen at a frequency of 120Hz, thereby achieving a scrolling effect for text or patterns. The text / pattern display is achieved by dynamically adjusting the duty cycle. At the same time, the LED light driver module can feed back its working status to the main control module, thereby achieving closed-loop control. Then, the power supply module supplies power to each module of the system. The connection with the main control module allows the main control to monitor the power status, and the connection with the LED light driver module ensures that the driver has stable power. The protection module ensures system safety in real time through a hierarchical collaborative mechanism (overcurrent μs-level cutoff, overvoltage dynamic voltage regulation, and intelligent power reduction due to temperature). The protection module can receive the voltage, current, and temperature sampling signals of the power supply module in real time, and promptly feed back to the main control and take protective measures such as power-off when abnormalities occur. While ensuring safety, it avoids redundant connections, making it suitable for low-cost intelligent lighting systems such as curtain lights. Through the bidirectional connection between the protection module and the main control module, it is used to report fault status in real time and receive main control commands. Through the collaborative work of each module, the system can resist complex environmental interference and respond quickly when a fault occurs, reducing maintenance costs by more than 70%, perfectly meeting the low-cost and high-reliability requirements of curtain lights.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A curtain light control system, comprising a user interaction module, a main control module, an LED light driver module, a power supply module, a protection module, and a communication isolation module, characterized in that: The user interaction module is bidirectionally connected to the communication isolation module, the communication isolation module is bidirectionally connected to the main control module, the main control module is bidirectionally connected to the LED light driver module, the LED light driver module is electrically connected to the power supply module, the power supply module is equipped with a backup power supply, the power supply module is bidirectionally electrically connected to the main control module, the power supply module is signal-connected to the protection module, and the protection module is bidirectionally connected to the main control module.

2. The door curtain light control system according to claim 1, characterized in that: The power module includes an AC-DC conversion unit, a rectifier and filter circuit, and a secondary voltage regulator circuit, which are connected in series.

3. A door curtain light control system according to claim 1, characterized in that: The LED driving module includes a dot matrix composed of multiple independent LED strings, a constant current driving circuit, and a scanning driving circuit. The multiple LED strings are connected in parallel to form a dot matrix, and each column is composed of multiple LEDs connected in series.

4. A door curtain light control system according to claim 1, characterized in that: The main control module includes an ESP32 chip and a PWM output drive circuit. In the PWM output drive circuit, a Zener diode is connected in parallel between the drain and gate of the MOSFET. The cathode of the Zener diode is connected to the gate of the MOSFET, and the anode is connected to the drain of the MOSFET. This is used to prevent voltage spikes during switching from damaging the MOSFET. In the PWM output drive circuit, a current-limiting resistor is connected in series with the gate of the MOSFET to avoid excessive current. In the PWM output drive circuit, a pull-down resistor is connected in parallel between the gate and source of the MOSFET to ensure reliable turn-off when power is off.

5. A door curtain light control system according to claim 1, characterized in that: The GPIO pins of the ESP32 chip generate PWM control signals that are connected to the PWM output drive circuit.

6. A door curtain light control system according to claim 1, characterized in that: The protection module includes an overcurrent protection circuit, an overvoltage protection circuit, and a temperature protection circuit. The overcurrent protection circuit, overvoltage protection circuit, and temperature protection circuit work together in a hierarchical manner to form a multi-level protection system.

7. A door curtain light control system according to claim 1, characterized in that: The communication isolation module includes a transformer, a signal processing and driving circuit, and an RC filter circuit.

8. A door curtain light control system according to claim 1, characterized in that: The RC filter circuit consists of a resistor R1 and a capacitor C1 connected in series. The two ends of the RC filter circuit are connected in parallel to the primary input terminal of the transformer. The signal processing and driving circuit, the RC filter circuit, and the primary coil of the transformer are all connected in series in the signal transmission path.

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