Intelligent dimming driving device

Abstract

The utility model discloses an intelligent dimming driving device which comprises a voice recognition module, a master control module, a wireless communication module and an intelligent dimming driving module, and the intelligent dimming driving module comprises a PWM isolation circuit, a push-pull amplification circuit, a noise reduction circuit and a dimming driving circuit. Compared with the prior art, the PWM dimming device has the advantages that the response speed and stability of PWM dimming signals are remarkably improved, the push-pull amplifying circuit is applied, so that the device can provide enough driving force when an LED lamp set needs large driving current, peak interference generated in the PWM signal amplifying process is restrained through the noise reduction circuit, the integrity of the signals and accurate control over the PWM signals are guaranteed, and the driving stability of the LED lamp set is improved. The problems that in the prior art, PWM driving instructions are slow in response and poor in stability are effectively solved. According to the device, voice control and remote control are integrated, so that the intelligent degree of equipment and the use experience of a user are further improved, and a more convenient and comfortable illumination control mode is provided for the user.

Description

Technical Field

[0001] The utility model relates to the technical field of dimming drive, in particular to an intelligent dimming drive device. Background Art

[0002] In recent years, with the rapid development of technologies such as the Internet of Things and artificial intelligence, smart home systems have gradually become popular. In the field of lighting, intelligent dimming systems have become a research hotspot. Intelligent dimming systems can not only achieve precise control of LED lights and improve the performance and efficiency of lighting systems, but also automatically adjust brightness and color according to user needs, providing users with a more comfortable and energy-saving lighting experience. For example, the Chinese invention patent with application number 202211679199.6 discloses an intelligent dimming drive device that supports voice control. The device wakes up the voice control unit through voice and issues control instructions. After receiving the instructions, the voice control unit synchronously issues control instructions to the intelligent adjustment drive module, and the brightness, color temperature and color of a single lamp are adjusted under the action of the voice control unit.

[0003] However, existing intelligent dimming systems based on PWM dimming technology suffer from slow response and poor stability due to factors such as internal circuit noise, external electromagnetic interference, and mutual interference between devices. This can easily lead to control failures. Furthermore, when LED light groups require high drive currents, they cannot provide sufficient driving force, resulting in unsatisfactory dimming effects and a negative impact on the user experience.

[0004] Therefore, the utility model provides a new solution to solve this problem. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide an intelligent dimming driving device.

[0006] The technical solution is: an intelligent dimming driving device, including a voice recognition module, a main control module, a wireless communication module and an intelligent dimming driving module, the intelligent dimming driving module includes:

[0007] A PWM isolation circuit is used to receive the PWM signal output by the control module and perform photoelectric isolation on the PWM signal;

[0008] Push-pull amplifier circuit, used to amplify the PWM signal after optical isolation;

[0009] a noise reduction circuit, the input end of which is connected to the push-pull amplifier circuit, for eliminating the introduced noise in the circuit; and

[0010] The dimming drive circuit is used to receive the noise-reduced PWM signal and adjust the brightness of the LED light group according to the duty cycle of the signal.

[0011] Preferably, the PWM isolation circuit includes a JFET tube T1 and a photocoupler U1, the gate of the JFET tube T1 is connected to the PWM signal output end of the main control module through a resistor R1, and is grounded through a resistor R2, the source of the JFET tube T1 is grounded through a resistor R3, the drain of the JFET tube T1 is connected to the cathode of the transmitting end of the photocoupler U1, the anode of the transmitting end of the photocoupler U1 is connected to the +3V power supply through a resistor R4, and is grounded through a capacitor C1, the collector of the receiving end of the photocoupler U1 is connected to the +12V power supply, the emitter of the receiving end of the photocoupler U1 is grounded through a resistor R5, and is connected to the input end of the push-pull amplifier circuit through a resistor R6.

[0012] Preferably, the push-pull amplifier circuit includes transistors VT1 and VT2, the bases of transistors VT1 and VT2 are connected to the output end of the PWM isolation circuit, the emitter of transistor VT1 is connected to a +12V power supply, the collector of transistor VT2 is grounded, and the collector of transistor VT1 and the emitter of transistor VT2 are connected to the noise reduction circuit.

[0013] Preferably, the noise reduction circuit includes a resistor R7, a capacitor C3 and a diode D1, one end of the resistor R7 is connected to the output end of the push-pull amplifier circuit, the other end of the resistor R7 is connected to one end of the capacitor C3, the cathode of the diode D1 and the control end of the dimming drive circuit, and the other end of the capacitor C3 and the anode of the diode D1 are grounded.

[0014] Preferably, the dimming drive circuit includes a MOS tube Q1 and a potentiometer VR1, the gate of the MOS tube Q1 is connected to the output end of the noise reduction circuit, the drain of the MOS tube Q1 is connected to one end of the resistor R8 through the potentiometer VR1, the other end of the resistor R8 is connected to the +12V power supply, and the source of the MOS tube Q1 is connected to the power supply end of the LED lamp group.

[0015] Preferably, the main control module uses a STC11F32XE type single chip microcomputer.

[0016] Preferably, it further comprises an ambient light sensor, and the detection signal output end of the ambient light sensor is connected to the main control module.

[0017] Through the above technical solutions, the beneficial effects of the utility model are:

[0018] 1. This utility model significantly improves the response speed and stability of the PWM dimming signal through the circuit design of the intelligent dimming driver module. The application of the push-pull amplifier circuit enables this device to provide sufficient driving force when the LED lamp group requires a large driving current. The noise reduction circuit is used to suppress the spike interference generated during the PWM signal amplification process, ensuring signal integrity and precise control of the PWM signal. This effectively solves the problems of slow response and poor stability of PWM drive instructions in the existing technology.

[0019] 2. By integrating voice control and remote control, the intelligence of the equipment and the user experience are further improved, providing users with a more convenient and comfortable lighting control method. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a system module structure diagram of the utility model.

[0021] Figure 2 This is a circuit diagram of the intelligent dimming drive module in this utility model.

[0022] Figure 3 This is the circuit principle diagram of the main control module in this utility model. DETAILED DESCRIPTION

[0023] The above and other technical contents, features and effects of the present invention are described in detail below with reference to the attached Figure 1 To the attached Figure 3 The detailed description of the embodiments will clearly show that the structural contents mentioned in the following embodiments are all based on the accompanying drawings.

[0024] Various exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0025] like Figure 1 and 2 As shown, an intelligent dimming driving device includes a voice recognition module 10, a main control module 20, a wireless communication module 30 and an intelligent dimming driving module 40. The intelligent dimming driving module 40 includes:

[0026] The PWM isolation circuit 41 is used to receive the PWM signal output by the control module 20 and perform optical isolation on the PWM signal;

[0027] A push-pull amplifier circuit 42 is used to amplify the PWM signal after optical isolation;

[0028] a noise reduction circuit 43, whose input end is connected to the push-pull amplifier circuit 42, for eliminating the introduced noise in the circuit; and

[0029] The dimming driving circuit 44 is used to receive the noise-reduced PWM signal and adjust the brightness of the LED light group 50 according to the duty cycle of the signal.

[0030] In the above, if Figure 2 As shown, the PWM isolation circuit 41 includes a JFET tube T1 and a photocoupler U1. The gate of the JFET tube T1 is connected to the PWM signal output end of the main control module through a resistor R1 and is grounded through a resistor R2. The source of the JFET tube T1 is grounded through a resistor R3. The drain of the JFET tube T1 is connected to the cathode of the transmitting end of the photocoupler U1. The anode of the transmitting end of the photocoupler U1 is connected to the +3V power supply through a resistor R4 and is grounded through a capacitor C1. The collector of the receiving end of the photocoupler U1 is connected to the +12V power supply. The emitter of the receiving end of the photocoupler U1 is grounded through a resistor R5 and is connected to the input end of the push-pull amplifier circuit through a resistor R6.

[0031] JFET T1 receives the PWM signal from the control module. Since PWM (pulse-width modulation) is a digital signal, and JFETs (junction field-effect transistors) offer high input impedance, low noise, and low power consumption, JFET T1 is well-suited to processing the PWM signal from the control module. Optocoupler U1 electrically isolates JFET T1's output signal, effectively protecting it from external electromagnetic interference and ensuring signal stability and reliability.

[0032] Push-pull amplifier circuit 42 amplifies the optically isolated PWM signal. Specifically, push-pull amplifier circuit 42 includes transistors VT1 and VT2. The bases of transistors VT1 and VT2 are connected to the output of the PWM isolation circuit, the emitter of transistor VT1 is connected to a +12V power supply, the collector of transistor VT2 is grounded, and the collector of transistor VT1 and the emitter of transistor VT2 are connected to a noise reduction circuit. Transistors VT1 and VT2 form a push-pull amplifier that rapidly enhances the PWM signal, thereby effectively improving the drive capability of the PWM signal.

[0033] During the rapid amplification of the PWM signal, spike interference is easily generated due to the rapid switching of the transistor's operating state, resulting in waveform distortion of the PWM signal, which in turn affects the precise control of the PWM signal over the brightness of the LED light assembly. Therefore, a noise reduction circuit 43 is employed to suppress the introduced noise in the circuit. Specifically, the noise reduction circuit 43 comprises a resistor R7, a capacitor C3, and a diode D1. One end of the resistor R7 is connected to the output end of the push-pull amplifier circuit, the other end of the resistor R7 is connected to one end of the capacitor C3, the cathode of the diode D1, and the control end of the dimming drive circuit, and the other end of the capacitor C3 and the anode of the diode D1 are grounded.

[0034] When the PWM signal output by the push-pull amplifier circuit 42 contains spike interference, the resistor R7 first limits the current, the capacitor C3 smoothes and filters the signal to reduce the high-frequency components, making the PWM signal more stable, and the diode D1 limits the peak voltage, reducing the impact of the spike interference on the circuit, so that the noise reduction circuit 43 can effectively suppress the spike interference generated during the PWM signal amplification process, ensuring the signal integrity and precise control of the PWM signal.

[0035] The dimming driver circuit 44 receives the noise-reduced PWM signal and adjusts the brightness of the LED light assembly based on the signal's duty cycle. Specifically, the dimming driver circuit 44 includes a MOS transistor Q1 and a potentiometer VR1. The gate of the MOS transistor Q1 is connected to the output of the noise reduction circuit. The drain of the MOS transistor Q1 is connected to one end of a resistor R8 through the potentiometer VR1. The other end of the resistor R8 is connected to a +12V power supply. The source of the MOS transistor Q1 is connected to the power supply of the LED light assembly.

[0036] MOS transistor Q1 receives the PWM signal. By changing the PWM signal's duty cycle, the on-time of MOS transistor Q1 can be altered, thereby changing the average current of the LED light cluster, achieving a dimming effect. When the PWM signal's duty cycle increases, the on-time of MOS transistor Q1 increases, brightening the LED cluster. When the duty cycle decreases, the LED cluster dims. Users can also adjust the resistance of potentiometer VR1 to change the current of the LED cluster, achieving manual dimming.

[0037] In the above, if Figure 3 As shown, the main control module uses the STC11F32XE microcontroller from Hongjing Technology. Featuring high speed, low power consumption, strong anti-interference capabilities, and abundant internal resources, it provides a powerful control core for the intelligent dimming driver. The device also includes an ambient light sensor. Its detection signal output is connected to the main control module, which converts the detected light signal into an analog signal and outputs it to the microcontroller, enabling intelligent detection of ambient light and automatically adjusting the brightness of the LED light cluster based on lighting conditions.

[0038] During operation, the voice recognition module recognizes user voice commands, such as "brighten the lights" or "dim the lights," and converts these commands into digital signals for processing by the main control module. As the core of the intelligent dimming driver, the main control module is responsible for receiving signals from the voice recognition module and, based on pre-set logic and algorithms, generating signals to control the intelligent dimming driver module. The main control module's recognition and processing of the voice recognition module is a mature prior art and will not be detailed here.

[0039] At the same time, in the intelligent dimming drive device, the wireless communication module can communicate with the user's mobile phone APP, smart home system, etc., receive remote control commands or send status information, which improves the intelligence of the equipment and the user experience.

[0040] During actual use, users can directly issue voice commands to the smart dimming driver, dimming or brightening the lights through the voice recognition module. Alternatively, remote control commands can be sent via a mobile app or smart home system, enabling remote control of the lights via the wireless communication module. Users can also view the smart dimming driver's status information in real time through the mobile app or smart home system, understanding the current brightness, operating mode, and more. Through this workflow and usage, the smart dimming driver can provide users with a more convenient and intelligent lighting experience.

[0041] In summary, the present invention significantly improves the response speed and stability of PWM dimming signals through the circuit design of the intelligent dimming drive module. The application of a push-pull amplifier circuit enables the device to provide sufficient driving force when the LED light group requires a large drive current. A noise reduction circuit is used to suppress the spike interference generated during the PWM signal amplification process, ensuring signal integrity and precise control of the PWM signal. This effectively solves the problems of slow PWM drive command response and poor stability in the prior art. Furthermore, by integrating voice control and remote control, the device's intelligence and user experience are further enhanced, providing users with a more convenient and comfortable lighting control method.

[0042] The above is a further detailed description of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to this; for technical personnel in the technical fields to which the present invention belongs and related technical fields, based on the technical solution ideas of the present invention, the expansion and replacement of operating methods and data should all fall within the scope of protection of the present invention.

Claims

1. An intelligent dimming driving device, comprising a voice recognition module, a main control module, a wireless communication module and an intelligent dimming driving module, characterized in that: The intelligent dimming driving module includes: A PWM isolation circuit is used to receive the PWM signal output by the main control module and perform optical isolation on the PWM signal; Push-pull amplifier circuit, used to amplify the PWM signal after optical isolation; a noise reduction circuit, the input end of which is connected to the push-pull amplifier circuit, for eliminating the introduced noise in the circuit; and The dimming drive circuit is used to receive the noise-reduced PWM signal and adjust the brightness of the LED light group according to the duty cycle of the signal.

2. The intelligent dimming driving device according to claim 1, characterized in that: The PWM isolation circuit includes a JFET tube T1 and a photocoupler U1. The gate of the JFET tube T1 is connected to the PWM signal output end of the main control module through a resistor R1 and is grounded through a resistor R2. The source of the JFET tube T1 is grounded through a resistor R3. The drain of the JFET tube T1 is connected to the cathode of the transmitting end of the photocoupler U1. The anode of the transmitting end of the photocoupler U1 is connected to the +3V power supply through a resistor R4 and is grounded through a capacitor C1. The collector of the receiving end of the photocoupler U1 is connected to the +12V power supply. The emitter of the receiving end of the photocoupler U1 is grounded through a resistor R5 and is connected to the input end of the push-pull amplifier circuit through a resistor R6.

3. The intelligent dimming driving device according to claim 2, characterized in that: The push-pull amplifier circuit includes transistors VT1 and VT2, the bases of transistors VT1 and VT2 are connected to the output end of the PWM isolation circuit, the emitter of transistor VT1 is connected to a +12V power supply, the collector of transistor VT2 is grounded, and the collector of transistor VT1 and the emitter of transistor VT2 are connected to the noise reduction circuit.

4. The intelligent dimming driving device according to claim 3, characterized in that: The noise reduction circuit includes a resistor R7, a capacitor C3 and a diode D1. One end of the resistor R7 is connected to the output end of the push-pull amplifier circuit, the other end of the resistor R7 is connected to one end of the capacitor C3, the cathode of the diode D1 and the control end of the dimming drive circuit, and the other end of the capacitor C3 and the anode of the diode D1 are grounded.

5. The intelligent dimming driving device according to claim 4, characterized in that: The dimming drive circuit includes a MOS tube Q1 and a potentiometer VR1. The gate of the MOS tube Q1 is connected to the output end of the noise reduction circuit. The drain of the MOS tube Q1 is connected to one end of the resistor R8 through the potentiometer VR1. The other end of the resistor R8 is connected to a +12V power supply. The source of the MOS tube Q1 is connected to the power supply end of the LED lamp group.

6. The intelligent dimming driving device according to claim 1, characterized in that: The main control module uses a STC11F32XE single chip microcomputer.

7. The intelligent dimming driving device according to claim 1, characterized in that: It also includes an ambient light sensor, and the detection signal output end of the ambient light sensor is connected to the main control module.

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