A dimming control device and a luminaire control apparatus

Abstract

The utility model relates to a kind of light control device and luminaire control equipment, belong to light control technical field.The device includes: signal processing module, for receiving external input voltage or signal;Signal processing unit includes integration unit;Integrated operational amplifier module, including amplification unit and integrated unit, amplification unit one end is connected with integrated unit, the other end is connected with integration unit;Integrated unit includes microcontroller;Signal isolation transmission module, including isolation unit, isolation unit is connected with microcontroller;Switch control module, including signal reverse unit, following unit and switch unit, signal reverse unit one end is connected with signal isolation transmission module, the other end is connected with following unit;Following unit is connected with switch unit.The utility model realizes direct dimming function by above-mentioned setting, supports multiple voltage input and signal control, while enhanced use safety.

Description

Technical Field

[0001] This utility model relates to the field of lighting control technology, and in particular to a dimming control device and a lighting control equipment. Background Technology

[0002] In modern agriculture and plant cultivation, LED lighting fixtures have become the core light source for supplemental lighting of plants due to their advantages such as low energy consumption, long lifespan, and customizable spectrum. Different growth stages of plants, such as seed germination, stem and leaf growth, and flowering and fruiting, have significantly different requirements for light spectrum. For example, seedlings need more blue light to promote root development, while flowering requires an increased proportion of red light to improve pollination and fruit set. Therefore, achieving precise adjustment of the LED lighting spectrum is a key technical requirement for ensuring plant growth quality and improving cultivation efficiency. The spectral adjustment of LED lighting fixtures essentially relies on the flexible control of the output power of their driver, which places clear demands on the dimming performance of the LED driver.

[0003] Traditional constant-voltage LED driver technology has significant limitations: Firstly, most traditional constant-voltage LED drivers lack direct dimming capabilities, failing to meet the dynamic spectral adjustment needs of plants at different growth stages. Secondly, while some solutions attempt to convert constant-voltage output to constant-current drive before dimming, this requires additional conversion circuitry, leading to complex circuitry, increased costs, and potential signal interference and stability degradation, making it difficult to meet the practical requirements of reliability and simplicity in planting environments. Furthermore, the compatibility and safety of control signals are crucial in practical applications of planting equipment. Different cultivation systems and control terminals output diverse dimming control signals, and traditional LED drivers often only support a single type of control signal, resulting in poor compatibility. Moreover, traditional driver solutions often lack isolation between the control signal and the LED output, making them susceptible to voltage fluctuations and electromagnetic interference that can affect control accuracy and even pose safety hazards, further limiting their widespread application in the planting field.

[0004] In summary, given the shortcomings of existing LED drivers, such as inability to directly dim, complex circuitry, poor control signal compatibility, and lack of isolation design, there is an urgent need to develop an LED driver solution that features simple circuitry, stable and reliable performance, supports multiple control signals, and achieves signal-output isolation, in order to meet the actual needs of LED lighting spectrum adjustment in the plant cultivation field. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the problems of inability to directly dim, complex circuits, poor compatibility of control signals and lack of isolation design in the prior art, thereby providing a dimming control device and a lamp control equipment.

[0006] Firstly, to solve the above-mentioned technical problems, this utility model provides a dimming control device, comprising: The signal processing module is used to receive external input voltage or signal; the signal processing unit includes an integration unit. An integrated operational amplifier module includes an amplification unit and an integration unit. One end of the amplification unit is connected to the integration unit, and the other end is connected to the integration unit. The integration unit includes a microcontroller. A signal isolation transmission module includes an isolation unit, which is connected to the microcontroller; The switch control module includes a signal inversion unit, a follower unit, and a switch unit. One end of the signal inversion unit is connected to the signal isolation transmission module, and the other end is connected to the follower unit. The follower unit is connected to the switch unit.

[0007] In one embodiment of the present invention, the integration unit includes a first resistor, a first capacitor, and a first diode, wherein the first resistor is connected to the first capacitor and the first diode is connected to the first resistor.

[0008] In one embodiment of the present invention, the amplification unit includes a first amplifier and a voltage divider; one end of the first amplifier is connected to the integration unit, and the other end is connected to the voltage divider.

[0009] In one embodiment of the present invention, the voltage divider includes a second resistor and a third resistor; one end of the second resistor is connected to the third resistor, and the other end is connected to the first amplifier.

[0010] In one embodiment of the present invention, the integrated unit further includes a filter, one end of which is connected to the amplification unit and the other end of which is connected to the microcontroller.

[0011] In one embodiment of this utility model, the signal isolation transmission module further includes an operational amplifier, one end of which is connected to the isolation unit and the other end of which is connected to the signal inversion unit.

[0012] In one embodiment of the present invention, the signal inversion unit includes a fifth resistor, a sixth resistor, and a first transistor; a first terminal of the first transistor is connected to the fifth resistor, a second terminal of the first transistor is connected to the sixth resistor, and a third terminal of the first transistor is grounded.

[0013] In one embodiment of the present invention, the follower unit includes a fourth resistor, a second amplifier, and a second capacitor. One end of the second amplifier is connected to the fourth resistor, and the other end is connected to the second capacitor.

[0014] In one embodiment of the present invention, the switching unit includes a second transistor and a seventh resistor, one end of the second transistor is connected to the seventh resistor, and the other end is connected to the lamp to be controlled.

[0015] Secondly, in order to solve the above-mentioned technical problems, this utility model provides a lighting control device, including the dimming control device mentioned above.

[0016] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects: (1) The dimming control device and lighting control equipment described in this utility model realize direct dimming function under constant voltage LED driving, while maintaining the simplicity of the circuit, improving the stability and reliability of performance, and effectively solving the problem that traditional driving methods cannot directly dim. In addition, this utility model supports a variety of external dimming signal inputs, which significantly improves the compatibility of control signals and enriches the selection range of dimming methods.

[0017] (2) This utility model achieves electrical isolation between the dimming signal and the output circuit and the lamp. This design not only significantly improves the safety of the device, but also enhances the anti-interference capability, ensuring the stable transmission of the dimming signal and the reliable operation of the lamp, providing users with a safer and more stable user experience. Attached Figure Description

[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of a dimming control device according to the present invention; Figure 2 This is a circuit diagram of a dimming control device according to the present invention; Figure 3 This is a utility model Figure 2 Partial circuit diagram.

[0020] Explanation of reference numerals in the accompanying drawings: 1. Signal processing module; 11. Integrator unit; 2. Integrated operational amplifier module; 21. Amplifier unit; 22. Integrated unit; 221. Microcontroller; 3. Signal isolation and transmission module; 31. Isolation unit; 4. Switch control module; 41. Signal inversion unit; 42. Follower unit; 43. Switch unit. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0022] Example 1: Reference Figure 1 As shown, this utility model provides a dimming control device, including: Signal processing module 1 is used to receive external input voltage or signal; the signal processing unit includes an integration unit 11; The integrated operational amplifier module 2 includes an amplification unit 21 and an integration unit 22. One end of the amplification unit 21 is connected to the integration unit 22, and the other end is connected to the integration unit 11. The integration unit 22 includes a microcontroller 221. The signal isolation transmission module 3 includes an isolation unit 31, which is connected to the microcontroller 221. The switch control module 4 includes a signal inversion unit 41, a follower unit 42, and a switch unit 43. One end of the signal inversion unit 41 is connected to the signal isolation transmission module 3, and the other end is connected to the follower unit 42. The follower unit 42 is connected to the switch unit 43.

[0023] The dimming control device described in this utility model achieves direct dimming functionality through the above-mentioned configuration, eliminating the need for additional conversion circuitry. This design not only simplifies the circuit layout but also significantly improves the stability and reliability of the device. The device supports multiple voltage inputs and various control methods, including PWM signals, meeting the needs of different application scenarios. Furthermore, the control signal and output terminals are isolated, effectively enhancing safety during use. Specifically, the signal processing module 1 can receive various external input voltages or signals, process them through the integration unit 11, and convert them into DC voltage signals, providing a high-quality signal source for subsequent processing. Secondly, the amplification unit 21 in the integrated operational amplifier module 2 is connected to the integration unit 11, further enhancing signal stability and accuracy. Simultaneously, the microcontroller 221 in the integrated unit 22 enables intelligent signal processing, improving the overall performance of the device. The signal isolation transmission module 3 is connected to the microcontroller 221 through the isolation unit 31, ensuring that the signal is not interfered with during transmission, enhancing the device's anti-interference capability and safety. Finally, the signal inversion unit 41, the following unit 42, and the switching unit 43 in the switch control module 4 work together to achieve precise control of the load. This design not only improves the flexibility and reliability of the device, but also optimizes the efficiency of signal processing and control, providing users with an efficient and stable dimming control solution.

[0024] Specifically, refer to Figures 2 to 3As shown, P1 represents the external dimming signal input terminal, used to receive external dimming signals and control the dimming of the lamps. P2 represents the auxiliary DC voltage VCC input terminal, responsible for providing power to U7 in the main circuit. Simultaneously, VCC is converted to +5V via U2 (LDO) to power N1 (integrated IC), ensuring its normal operation. P3 represents the output auxiliary DC voltage VCC-S input terminal, providing power to U3. VCC-S, after passing through capacitor C1 (filter) and U1 (LDO), yields VDD. VDD provides the operating voltage for the phototransistor inside the optocoupler, ensuring its normal operation; it also powers the switching MOS Q7 of the PWM inverting circuit in signal inversion unit 41, ensuring the stable operation of the PWM inverting circuit. Furthermore, the auxiliary DC power supplies of P2 and P3 are mutually isolated, a design that meets basic insulation requirements and effectively improves the safety and reliability of the device.

[0025] Furthermore, in Figures 2 to 3 In this diagram, SGND and AGND both represent grounding terminals. The connection between VOUT+ and VOUT- is used for the output of the LED constant voltage light strip. VIN+ and VIN- represent the input terminals of the constant voltage power supply.

[0026] Specifically, refer to Figure 2 As shown, the working principle of signal processing module 1 and integrated operational amplifier module 2 is as follows: Externally input 0-10V, 0-5V, 0-10V PWM signals, or 0-5V PWM signals are first processed by integrator unit 11, effectively filtering out noise and smoothing the signal. The processed signal is then subjected to follower and voltage divider operations by integrated operational amplifier module 2, ultimately converting it into a 0-5V voltage signal, which is accurately transmitted to the integrated IC for further processing. During this process, the microcontroller 221 (N1) in the integrated IC is responsible for intelligent signal processing to achieve precise control.

[0027] Specifically, the integration unit 11 in the signal processing module 1 includes a first resistor R37, a first capacitor C31, and a first diode D2. The first resistor R37 is connected to the first capacitor C31, and the first diode D2 is connected to the first resistor R37. The other ends of both the first capacitor C31 and the first diode D2 are grounded to AGND. In this embodiment, the first diode D2 is used to prevent reverse current.

[0028] Further, the operation of the integrator unit 11 is as follows: the dimming input signal enters the integrator unit 11 from pin 1 of interface P1, and the input signal is connected to ground AGND through the first diode D2. The input signal is current-limited by the first resistor R37, and then filtered by the first capacitor C31 to remove high-frequency noise. The dimming input signal can be a 0-10V voltage, a 0-5V voltage, a 0-10V PWM signal, or a 0-5V PWM signal. The dimming input signal is converted into a DC voltage signal by the integrator unit 11 and then input to the integrated operational amplifier module 2.

[0029] Specifically, the amplification unit 21 in the integrated operational amplifier module 2 includes a first amplifier U7 and a voltage divider. One end of the first amplifier U7 (i.e., pin 1) is connected to the first resistor R37 of the integration unit 11, and the other end (i.e., pin 4) is connected to the voltage divider. The voltage divider includes a second resistor R38 and a third resistor R43. One end of the second resistor R38 is connected to the third resistor R43, and the other end is connected to the first amplifier U7. Pin 2 of the first amplifier U7 is grounded to AGND.

[0030] Specifically, the integrated unit 22 in the integrated operational amplifier module 2 also includes a filter. One end of the filter is connected to the third resistor R43 in the amplification unit 21, and the other end is connected to the microcontroller 221 (N1). The filter includes a Zener diode D4 and a capacitor C20 connected in parallel. One end of the capacitor C20 is connected to a pin of the microcontroller 221, and the other end is grounded to AGND.

[0031] Furthermore, the integrated operational amplifier module 2 also includes a low-pass filter, which includes a resistor R55 and a capacitor C30. One end of the resistor R55 is connected to the power supply and the other end is connected to pin 5 of the first amplifier U7. One end of the capacitor C30 is connected to the resistor R55 and the other end is grounded to AGND.

[0032] Furthermore, the operating principle of the integrated operational amplifier module 2 is as follows: the DC voltage signal input to the integrator unit 11 is first processed by the first amplifier U7, then divided by the second resistor R38 and the third resistor R43, and finally input to the integrated IC. After receiving the signal, the integrated IC outputs a PWM signal. In this process, the Zener diode D4 protects the microcontroller 221 (N1) in the integrated IC from damage due to overvoltage.

[0033] Specifically, the signal isolation transmission module 3 is used to achieve electrical isolation between the dimming signal and the output circuit, and works with the PWM signal output by the integrated IC to control the switching state of the MOSFET Q3. (Refer to...) Figure 3As shown, in this embodiment, the signal isolation transmission module 3 further includes an operational amplifier OP1, one end of which is connected to the isolation unit 31 and the other end is connected to the signal inversion unit 41.

[0034] Furthermore, the isolation unit 31 includes resistors R1 and R3. In this embodiment, resistors R1 and R3 are connected, and resistor R3 is connected to operational amplifier OP1. An isolated PWM signal transmission path is constructed through resistors R1 and R3, along with the +5V and VDD power supplies. This design not only ensures stable signal transmission but also improves circuit safety and anti-interference capabilities.

[0035] Furthermore, the signal inversion unit 41 includes a fifth resistor R5, a sixth resistor R67, and a first transistor Q7; the first terminal (i.e., the G terminal) of the first transistor Q7 is connected to the fifth resistor R5, the second terminal (i.e., the D terminal) of the first transistor Q7 is connected to the sixth resistor R67, and the third terminal (i.e., the S terminal) of the first transistor Q7 is grounded to SGND.

[0036] Specifically, the follower unit 42 includes a fourth resistor R4, a second amplifier U3, and a second capacitor C28. One end of the second amplifier U3 (i.e., pin 1) is connected to the fourth resistor R4, and the other end (i.e., pin 5) is connected to the second capacitor C28. In addition, pin 2 of the second amplifier U3 is grounded to SGND.

[0037] Specifically, the switching unit 43 includes a second transistor Q3 and a seventh resistor R11. One end of the second transistor Q3 (i.e., the gate terminal) is connected to the seventh resistor R11, and the other end (i.e., the drain terminal) is connected to the lamp to be controlled. The lamp can be an LED light strip or other type of lighting equipment. This configuration allows the switching control of the lamp to be achieved by controlling the gate voltage of the second transistor Q3.

[0038] Furthermore, in the switch control module 4, accurate control of the lamp is achieved through the fifth resistor R5 and the sixth resistor R67, the first transistor Q7, the fourth resistor R4, the second amplifier U3, the auxiliary DC power supply VCC-S (powering the second amplifier U3), the seventh resistor R11, the second capacitor C28, and the second transistor Q3. Specifically, the fifth resistor R5, the sixth resistor R67, and the first transistor Q7 constitute a PWM signal inverting unit, responsible for reversing the polarity of the PWM signal. The fourth resistor R4, the second operational amplifier U3, and the second capacitor C28 form an operational amplifier follower circuit, which enhances the driving force of the PWM signal, thereby effectively controlling the on and off times of the MOSFET Q3. This design allows the circuit to precisely adjust the output current and power.

[0039] Specifically, the dimming control device described in this embodiment further includes a first voltage regulator module and a second voltage regulator module. The first voltage regulator module includes a voltage regulator U1 and capacitors (C1 and C3). The voltage regulator U1 is used to adjust the voltage to ensure output stability. (Refer to...) Figure 3 As shown, the input voltage VDD first passes through capacitor C3, which acts as an input filter to smooth the input voltage and reduce potential high-frequency noise. Next, the filtered voltage is fed to pin 1 of regulator U1. Pin 2 of regulator U1 is directly grounded to SGND, and pin 3 is the output terminal of regulator U1, which outputs a regulated and stable voltage. This voltage is further filtered by capacitor C1 before being supplied to circuit VCC-S. Capacitor C1, acting as an output filter, helps reduce output voltage ripple and noise, ensuring a smooth and stable output voltage.

[0040] Furthermore, referring to Figure 2 As shown, the second voltage regulator module includes multiple capacitors (C5, C6, and C7) and a voltage regulator U2. Regulator U2 is responsible for converting the input voltage into a stable output voltage. The input voltage enters pin 1 of regulator U2, the input terminal VIN, through capacitor C5. Pin 2 of regulator U2 is grounded to AGND. After processing by the regulator, the stable output voltage is output from pin 3, VOUT, and then output to the circuit via capacitor C7, labeled VCC. Between the input and output, capacitor C6 acts as a bypass capacitor, which helps reduce output impedance, decreases output voltage ripple and noise, thereby improving the circuit's transient response. Furthermore, capacitor C7 at the output terminal further filters and stabilizes the output voltage, ensuring its smoothness and stability. This configuration provides a clean and stable voltage, meeting the needs of various electronic devices.

[0041] The dimming control device described in this embodiment has significant advantages in constant voltage LED driver dimming technology, as detailed below: First, traditional constant-voltage LED drivers typically cannot directly dim; the constant-voltage output must be converted to a constant-current drive to achieve dimming. This not only increases circuit complexity but also reduces device reliability. This embodiment overcomes this limitation by achieving direct dimming under constant-voltage LED driving through innovative design, while maintaining circuit simplicity and ensuring performance stability and reliability, effectively solving the drawback of traditional driving methods that cannot dim.

[0042] Secondly, the dimming control device described in this embodiment supports multiple external dimming signal inputs, greatly improving the flexibility of dimming control. Users can select various dimming modes such as 0-10V voltage, 0-5V voltage, 0-10V PWM signal, or 0-5V PWM signal according to actual needs, meeting diverse dimming requirements in different application scenarios and providing users with a more convenient and efficient dimming solution.

[0043] Third, regarding safety and stability, the dimming control device described in this embodiment employs a signal isolation design. Electrical isolation is achieved between the dimming signal (including 0-10V, 0-5V, 0-10V PWM, or 0-5V PWM signals) and the output circuit and lighting fixtures (such as LED beads). This design not only improves the device's safety but also enhances its anti-interference capabilities, ensuring stable transmission of the dimming signal and reliable operation of the lighting fixtures, providing users with a safer and more stable user experience.

[0044] Furthermore, the dimming control device described in this embodiment can realize the dimming function of constant voltage LED lamps. In the application field of LED plant lighting, plants have different spectral requirements at different growth stages. Therefore, through this dimming control device, the spectrum of the LED lamps can be precisely adjusted to meet the specific needs of plants at each growth stage.

[0045] Example 2: The present invention provides a lighting control device, including a dimming control device as described in Embodiment 1.

[0046] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A dimming control device, characterized in that, include: The signal processing module is used to receive external input voltage or signal; the signal processing unit includes an integration unit. An integrated operational amplifier module includes an amplification unit and an integration unit. One end of the amplification unit is connected to the integration unit, and the other end is connected to the integration unit. The integration unit includes a microcontroller. A signal isolation transmission module includes an isolation unit, which is connected to the microcontroller; The switch control module includes a signal inversion unit, a follower unit, and a switch unit. One end of the signal inversion unit is connected to the signal isolation transmission module, and the other end is connected to the follower unit. The follower unit is connected to the switch unit.

2. The dimming control device according to claim 1, characterized in that, The integration unit includes a first resistor, a first capacitor, and a first diode, wherein the first resistor is connected to the first capacitor, and the first diode is connected to the first resistor.

3. The dimming control device according to claim 1, characterized in that, The amplification unit includes a first amplifier and a voltage divider; one end of the first amplifier is connected to the integrator and the other end is connected to the voltage divider.

4. A dimming control device according to claim 3, characterized in that, The voltage divider includes a second resistor and a third resistor; one end of the second resistor is connected to the third resistor, and the other end is connected to the first amplifier.

5. A dimming control device according to claim 1, characterized in that, The integrated unit also includes a filter, one end of which is connected to the amplification unit and the other end of which is connected to the microcontroller.

6. A dimming control device according to claim 1, characterized in that, The signal isolation transmission module further includes an operational amplifier, one end of which is connected to the isolation unit and the other end of which is connected to the signal inversion unit.

7. A dimming control device according to claim 1, characterized in that, The signal inversion unit includes a fifth resistor, a sixth resistor, and a first transistor; the first terminal of the first transistor is connected to the fifth resistor, the second terminal of the first transistor is connected to the sixth resistor, and the third terminal of the first transistor is grounded.

8. A dimming control device according to claim 1, characterized in that, The follower unit includes a fourth resistor, a second amplifier, and a second capacitor. One end of the second amplifier is connected to the fourth resistor, and the other end is connected to the second capacitor.

9. A dimming control device according to claim 1, characterized in that, The switching unit includes a second transistor and a seventh resistor. One end of the second transistor is connected to the seventh resistor, and the other end is connected to the lamp to be controlled.

10. A lighting control device, characterized in that, Includes a dimming control device as described in any one of claims 1 to 9.

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