Integrated microwave radar sensing lighting control circuit and lighting fixture

Abstract

The present disclosure provides an integrated microwave radar sensing lighting control circuit and a lighting lamp, wherein the integrated microwave radar sensing lighting control circuit comprises an integrated metal substrate and a circuit device. The circuit device is composed of a wireless radio frequency module, a microwave radar module and a dimming driving module, which are arranged adjacent to each other on the same end surface of the substrate to form a highly integrated integrated structure. The microwave radar module is responsible for transmitting and receiving environmental microwave signals. The wireless radio frequency module processes radar signals in real time through the built-in radio frequency chip and triggers the dimming algorithm, and outputs the PWM control signal to the dimming driving module. The dimming driving module dynamically adjusts the light source load current based on the PWM signal through the dimming chip, realizing intelligent regulation and control of LED brightness. This design realizes the deep integration of signal processing, radar detection and light source driving through high integration, thereby significantly reducing signal transmission loss and electromagnetic interference, optimizing the heat dissipation path, and further improving the stability of the circuit.

Description

Technical Field

[0001] This disclosure relates to the technical field of intelligent lighting, and in particular to an integrated microwave radar sensing lighting control circuit and lighting fixture. Background Technology

[0002] Currently, the application of microwave radar sensing technology in the field of smart lighting mainly relies on discrete design schemes. These schemes typically separate the radio frequency chip, microwave radar module, and light source module, and transmit signals via cables or connectors.

[0003] However, the discrete design requires external cables to connect the RF chip and the microwave radar module, which can easily lead to severe attenuation of high-frequency signals during transmission. Furthermore, due to the long signal path and lack of effective shielding, the system is susceptible to external electromagnetic noise interference, affecting component lifespan and stability, and ultimately reducing product reliability. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide an integrated microwave radar sensing lighting control circuit and lighting fixture that integrates a wireless radio frequency chip, a dimming driver, and a microwave radar sensor.

[0005] The purpose of this disclosure is achieved through the following technical solution:

[0006] An integrated microwave radar sensing lighting control circuit includes an integrated metal substrate and a circuit device. The circuit device is disposed on the integrated metal substrate and includes a wireless radio frequency module, a microwave radar module, and a dimming drive module. The wireless radio frequency module, the microwave radar module, and the dimming drive module are disposed adjacent to each other on the same end face of the integrated metal substrate to form an integrated structure.

[0007] The microwave radar module is used to transmit microwave signals and transmit the received reflected signals to the wireless radio frequency module; the dimming drive module is used to receive the PWM signal from the wireless radio frequency module and control the output current to the light source load through the dimming chip.

[0008] The wireless radio frequency module includes a radio frequency chip and a first filter capacitor. The PWM signal output terminal of the radio frequency chip is connected to the PWM signal receiving terminal of the dimming drive module. The microwave data transmitting terminal of the microwave radar module is connected to the microwave data receiving terminal of the radio frequency chip. One end of the first filter capacitor is connected to the power supply terminal of the radio frequency chip. The power supply terminal of the radio frequency chip is used to connect to an external power supply. The other end of the first filter capacitor is grounded.

[0009] In one embodiment, the microwave radar module includes a microwave processing chip and a second filter capacitor. One end of the second filter capacitor is connected to the power supply terminal of the radio frequency chip, and the other end of the second filter capacitor is grounded. The first signal transmitting terminal of the microwave processing chip is connected to the first signal receiving terminal of the radio frequency chip, and the second signal transmitting terminal of the microwave processing chip is connected to the second signal receiving terminal of the radio frequency chip.

[0010] In one embodiment, the dimming drive module includes a dimming control circuit and a rectifier circuit. The input terminal of the rectifier circuit is connected to an external power supply, the output terminal of the rectifier circuit is connected to the input terminal of the dimming control circuit, and the output terminal of the dimming control circuit is connected to a light source load.

[0011] In one embodiment, the rectifier circuit includes a bridge rectifier unit and an overvoltage protection unit. The input terminal of the overvoltage protection unit is connected to an external power supply, the output terminal of the overvoltage protection unit is connected to the input terminal of the bridge rectifier unit, and the output terminal of the bridge rectifier unit is connected to the input terminal of the dimming control circuit.

[0012] In one embodiment, the dimming control circuit includes a dimming control chip and a first voltage divider resistor, and the PWM signal output terminal of the radio frequency chip is connected to the PWM signal receiving terminal of the dimming control chip through the first voltage divider resistor.

[0013] In one embodiment, the dimming control circuit further includes a third filter capacitor, the first end of which is connected to the PWM signal receiving end of the dimming control chip, and the second end of which is grounded.

[0014] In one embodiment, the thermal conductivity of the integrated metal substrate is greater than or equal to 5 W / m·K.

[0015] In one embodiment, the integrated metal substrate includes a circuit layer and an insulating layer, the circuit layer being connected to the insulating layer, and the circuit layer being used to electrically connect the wireless radio frequency module, the microwave radar module, and the dimming drive module to each other.

[0016] In one embodiment, the integrated metal substrate further includes a metal substrate connected to the insulating layer, the metal substrate serving as a common grounding layer and heat dissipation channel for the wireless radio frequency module, the microwave radar module, and the dimming drive module.

[0017] This application provides a lighting fixture, including a fixture base, an LED light source, and an integrated microwave radar sensing lighting control circuit as described in any embodiment. The integrated metal substrate is fixed to the fixture base, and the output terminal of the dimming drive module is connected to the input terminal of the LED light source.

[0018] Compared with the prior art, this disclosure has at least the following advantages:

[0019] The aforementioned integrated microwave radar-sensing lighting control circuit receives the detection signal from the microwave radar module in real time via an RF chip and triggers a dimming algorithm to output a corresponding PWM control signal to the LED light source. This enables dynamic brightness adjustment of the LED light source, thereby improving the intelligence level of the integrated microwave radar-sensing lighting control circuit, achieving energy savings, and enhancing the user experience. Furthermore, this application integrates the RF chip, microwave radar module, and integrated metal substrate into a single circuit design, achieving deep integration of signal processing, radar detection, and light source driving. This reduces signal transmission loss and electromagnetic interference, improving the overall performance and stability of the system. Simultaneously, the integrated metal substrate forms a unified thermal management path, improving the heat dissipation efficiency of the components in the circuit, thus ensuring the stable operation of the integrated microwave radar-sensing lighting control circuit. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A circuit diagram of an integrated microwave radar sensing lighting control circuit according to one embodiment;

[0022] Figure 2 for Figure 1 The circuit diagram of the dimming drive module shown is shown.

[0023] Figure 3 for Figure 1 The circuit diagram of the light source load is shown.

[0024] Figure 4 for Figure 1 The circuit diagram shown is of the integrated metal substrate circuit layer.

[0025] Figure 5 for Figure 1 A physical structural diagram of an integrated microwave radar sensing lighting control circuit according to an embodiment. Detailed Implementation

[0026] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0030] like Figures 1 to 5 As shown, an integrated microwave radar sensing lighting control circuit 10 according to an embodiment of the present disclosure includes an integrated metal substrate 100 and a circuit device 200. The circuit device 200 is disposed on the integrated metal substrate 100 and includes a wireless radio frequency module 210, a microwave radar module 220 and a dimming drive module 230. The wireless radio frequency module 210, the microwave radar module 220 and the dimming drive module 230 are disposed adjacent to each other on the same end face of the integrated metal substrate 100 to form an integrated structure.

[0031] The microwave radar module 220 is used to transmit microwave signals and transmit the received reflected signals to the wireless radio frequency module 210; the dimming drive module 230 is used to receive the PWM signal from the wireless radio frequency module 210 and control the output current to the light source load 300 through the dimming chip.

[0032] The wireless radio frequency module 210 includes a radio frequency chip U5 and a first filter capacitor C10. The PWM signal output terminal PWM1 of the radio frequency chip U5 is connected to the PWM signal receiving terminal PWM of the dimming drive module 230. The microwave data transmitting terminal TXD of the microwave radar module 220 is connected to the microwave data receiving terminal U1RX of the radio frequency chip U5. One end of the first filter capacitor C10 is connected to the power supply terminal of the radio frequency chip U5, which is used to connect to an external power supply. The other end of the first filter capacitor C10 is grounded.

[0033] In this embodiment, after the microwave radar module 220 is activated, it begins to emit microwave signals into the surrounding environment. When the microwave signals encounter obstacles or moving objects, they are reflected back, forming reflected signals. After the reflected signals are received by the antenna assembly of the microwave radar module 220, the microwave radar module 220 performs preliminary demodulation processing on the reflected signals and then transmits the processed electrical signals to the wireless radio frequency module 210. Specifically, the MCU unit of the radio frequency chip U5 receives the electrical signals emitted from the microwave data transmitter TXD of the microwave radar module 220 through the microwave data receiver U1RX, and analyzes the object's moving speed and distance using an algorithm. Then, the radio frequency chip U5 generates a PWM signal with an adjustable duty cycle of 0-100% based on the detection results. Since the PWM signal output terminal PWM1 of the radio frequency chip U5 is connected to the PWM signal receiver terminal PWM of the dimming drive module 230, when the radio frequency chip U5 generates the PWM signal, the signal is transmitted to the dimming drive module 230. After receiving the PWM signal, the dimming drive module 230 controls the output current to the light source load 300 through the internal dimming chip, thereby realizing the dynamic adjustment of the light source brightness.

[0034] Furthermore, since the wireless radio frequency module 210, microwave radar module 220, and dimming drive module 230 are arranged adjacent to each other on the same end face of the integrated metal substrate 100, forming an integrated structure, the signal transmission path of the entire system is shorter and more direct, reducing the possibility of signal attenuation and interference. At the same time, because the integrated metal substrate 100 can act as a heat sink, it can quickly dissipate the heat generated by each module, making the integrated structure effectively improve the heat dissipation efficiency of the circuit device 200.

[0035] The aforementioned integrated microwave radar sensing lighting control circuit 10 receives the detection signal from the microwave radar module 220 in real time through the RF chip U5 and triggers a dimming algorithm to output a corresponding PWM control signal to the LED light source, thereby achieving dynamic brightness adjustment of the LED light source. This improves the intelligence level of the integrated microwave radar sensing lighting control circuit 10, achieves energy saving, and enhances the user experience. Furthermore, this application integrates the RF chip U5, the microwave radar module 220, and the integrated metal substrate 100 into a single circuit design, achieving deep integration of signal processing, radar detection, and light source driving. This reduces signal transmission loss and electromagnetic interference, improving the overall performance and stability of the system. Simultaneously, the integrated metal substrate forms a unified thermal management path, improving the heat dissipation efficiency of the components in the circuit, thus ensuring the stable operation of the integrated microwave radar sensing lighting control circuit 10.

[0036] like Figure 1 As shown, in one embodiment, the microwave radar module 220 includes a microwave processing chip SoC and a second filter capacitor C13. One end of the second filter capacitor C13 is connected to the power supply terminal of the radio frequency chip U5, and the other end of the second filter capacitor C13 is grounded. The first signal transmitting terminal of the microwave processing chip SoC is connected to the first signal receiving terminal of the radio frequency chip U5, and the second signal transmitting terminal of the microwave processing chip SoC is connected to the second signal receiving terminal of the radio frequency chip U5. In this embodiment, when the integrated microwave radar sensing lighting control circuit 10 is in operation, the microwave processing chip SoC is activated and generates a microwave signal of a specific frequency and power. The microwave signal is transmitted to the surrounding environment through the antenna assembly of the microwave radar module 220 to detect possible obstacles or moving objects. When the microwave signal encounters an obstacle or moving object, it is reflected, forming a reflected signal. These reflected signals are received by the antenna assembly of the microwave radar module 220 and transmitted to the microwave processing chip SoC. The microwave processing chip SoC performs preliminary processing on the received reflected signals to remove noise and interference and enhance signal quality. The pre-processed reflected signals are then transmitted to the radio frequency chip U5. Furthermore, since the second filter capacitor C13 is connected in parallel between the power supply terminal and the ground terminal of the microwave processing chip SoC, the second filter capacitor C13 can effectively smooth the power supply voltage and reduce the interference of power supply noise on the microwave processing chip SoC through its energy storage and filtering characteristics, thereby improving the stability of the microwave processing chip SoC.

[0037] like Figures 1 to 3As shown, in one embodiment, the dimming drive module 230 includes a dimming control circuit and a rectifier circuit. The input terminal of the rectifier circuit is connected to an external power supply, and the output terminal of the rectifier circuit is connected to the input terminal of the dimming control circuit. The output terminal of the dimming control circuit is connected to the light source load 300. In this embodiment, when the external power supply is connected to the input terminal of the rectifier circuit, AC power begins to pass through the rectifier circuit. The rectifier circuit consists of a diode bridge rectifier, which utilizes the unidirectional conductivity of diodes to conduct the positive and negative half-cycles of the AC power respectively, enabling the rectifier circuit to output pulsating DC power to the dimming control circuit at its output terminal. When the PWM signal generated by the wireless radio frequency module 210 is transmitted to the input terminal of the dimming control circuit, the power drive chip controls the on-time of the switching transistor according to the duty cycle of the PWM signal, thereby adjusting the average current obtained by the light source load 300. Specifically, when the duty cycle of the PWM signal increases, the power drive chip increases the conduction time; when the duty cycle of the PWM signal decreases, the power drive chip decreases the conduction time, thereby controlling the average current of the output current and thus changing the brightness of the light source load 300. Furthermore, when a human body is detected approaching, the wireless radio frequency module 210 generates a PWM signal with a larger duty cycle. Upon receiving this signal, the dimming control circuit increases the average output current, increasing the brightness of the light source load 300; when the human body moves away, the wireless radio frequency module 210 generates a PWM signal with a smaller duty cycle, and the dimming control circuit decreases the average output current, reducing the brightness of the light source load 300. This achieves precise control of the light source brightness, meeting the lighting needs of different scenarios and improving energy efficiency.

[0038] like Figure 1 and Figure 2 As shown, in one embodiment, the rectifier circuit includes a bridge rectifier unit and an overvoltage protection unit. The input terminal of the overvoltage protection unit is connected to an external power supply, and the output terminal of the overvoltage protection unit is connected to the input terminal of the bridge rectifier unit. The output terminal of the bridge rectifier unit is connected to the input terminal of the dimming control circuit. In this embodiment, the overvoltage protection unit includes a varistor. When the external power supply voltage is too high, the varistor responds quickly, limiting the voltage input to the bridge rectifier unit and ensuring the safety of the bridge rectifier unit and subsequent circuits. Specifically, when the external power supply voltage exceeds the threshold voltage of the varistor, the resistance of the varistor drops sharply, forming a low-resistance path that bypasses the excess voltage to ground, thereby limiting the voltage input to the bridge rectifier unit. Then, the bridge rectifier unit converts the protected AC power into pulsating DC power and transmits it to the dimming control circuit, so that the bridge rectifier unit and the overvoltage protection unit work together in the rectifier circuit to provide a stable and reliable DC power supply for the dimming control circuit.

[0039] like Figures 1 to 3As shown, in one embodiment, the dimming control circuit includes a dimming control chip U2 and a first voltage divider resistor R9. The PWM signal output terminal PWM1 of the RF chip U5 is connected to the PWM signal receiving terminal PWM of the dimming control chip U2 through the first voltage divider resistor R9. In this embodiment, after the RF chip U5 generates a PWM signal, the signal is transmitted to the PWM signal receiving terminal PWM of the dimming control chip U2 through the first voltage divider resistor R9. The dimming control chip U2 decodes the received PWM signal and generates a corresponding control signal according to the duty cycle of the PWM signal. The dimming control chip U2 adjusts the on-time of the output terminal according to the dimming control signal generated by decoding, thereby controlling the average current output to the light source load 300. When the control signal requires an increase in brightness, the power drive chip increases the on-time of the switching transistor output current; when the control signal requires a decrease in brightness, the power drive chip decreases the on-time of the switching transistor output current to change the magnitude of the average current obtained by the light source load 300, thereby achieving precise adjustment of the light source brightness. By dynamically adjusting the brightness of the light source, the dimming control chip U2 can meet the lighting needs of different scenarios and improve energy efficiency.

[0040] like Figures 1 to 3 As shown, in one embodiment, the dimming control circuit further includes a third filter capacitor C11. The first terminal of the third filter capacitor C11 is connected to the PWM signal receiving terminal of the dimming control chip U2, and the second terminal of the third filter capacitor C11 is grounded. In this embodiment, when the PWM signal generated by the RF chip U5 is transmitted to the PWM signal receiving terminal of the dimming control chip U2 through the first voltage divider resistor R9, it may be affected by external electromagnetic interference or internal circuit noise, resulting in high-frequency noise mixed into the PWM signal. Since the third filter capacitor C11 is connected in parallel between the PWM signal receiving terminal of the dimming control chip U2 and ground, its low impedance characteristic for high-frequency signals can bypass high-frequency noise to the ground terminal, thereby purifying the PWM signal. The PWM signal after filtering is smoother and more stable, thereby ensuring that the dimming control chip U2 can accurately decode and process the PWM signal, avoiding abnormal brightness adjustment caused by signal distortion, and thus achieving precise control of the 300 lux brightness of the light source load.

[0041] like Figures 1 to 5As shown, in one embodiment, the thermal conductivity of the integrated metal substrate 100 is greater than or equal to 5 W / m·K. In this embodiment, during the operation of the microwave radar sensing lighting control circuit, the wireless radio frequency module 210, the microwave radar module 220, and the dimming drive module 230 all generate a certain amount of heat. If the heat is not dissipated in time, the circuit temperature will rise, thereby affecting the circuit's performance and stability. A high-performance aluminum substrate with a thermal conductivity of not less than 5 W / m·K, with its excellent thermal conductivity, can quickly conduct the heat generated by each module from the circuit layer to the metal substrate layer. The metal base layer of the aluminum substrate serves as the main heat dissipation channel, dissipating heat to the surrounding environment through natural convection or forced air cooling. Due to the high thermal conductivity of the aluminum substrate, the heat conduction efficiency within the substrate is high, ensuring that heat can be dissipated in a timely and effective manner. Through the heat dissipation effect of the high-performance aluminum substrate, the operating temperature of the microwave radar sensing lighting control circuit is effectively controlled, thereby helping to reduce circuit failures and performance degradation caused by excessive temperature, and thus providing a stable operating environment for the circuit.

[0042] like Figures 1 to 5 As shown, in one embodiment, the integrated metal substrate 100 includes a circuit layer and an insulating layer. The circuit layer is connected to the insulating layer and is used to electrically connect the wireless radio frequency module 210, the microwave radar module 220, and the dimming drive module 230. In this embodiment, the circuit layer, as the core part of the integrated metal substrate 100, is responsible for electrically connecting the wireless radio frequency module 210, the microwave radar module 220, and the dimming drive module 230. The PWM signal of the radio frequency chip U5 is directly transmitted to the PWM signal receiving end of the dimming drive module 230 through precise wiring on the circuit layer, realizing fast signal response and accurate transmission. The reflected signal received by the microwave radar module 220 is transmitted to the radio frequency chip U5 through the circuit layer for demodulation processing, forming a closed-loop signal processing path. The circuit layer uses precise wiring technology, enabling a short-distance connection between the radio frequency chip U5 and the microwave radar module 220, reducing loss and interference in the signal transmission path, further reducing signal attenuation, and thus improving signal transmission efficiency and accuracy.

[0043] like Figures 1 to 5As shown, in one embodiment, the integrated metal substrate 100 further includes a metal substrate connected to an insulating layer. The metal substrate serves as a common grounding layer and heat dissipation channel for the wireless radio frequency module 210, the microwave radar module 220, and the dimming drive module 230. In this embodiment, when the wireless radio frequency module 210, the microwave radar module 220, and the dimming drive module 230 begin operation, the electrical signals generated by each module need to operate in a stable grounded environment to ensure normal signal transmission and processing. The metal substrate, as a common grounding layer, provides a unified potential reference point for these three modules. Because the metal substrate tightly connects the grounding pins of each module to itself, the grounding paths of each module are short and have low resistance, ensuring signal stability and accuracy. Furthermore, when the microwave radar module 220 transmits and receives microwave signals, its antenna components and related circuits also require good grounding to reduce electromagnetic radiation and external interference. In addition, the metal substrate, as a common grounding layer, can effectively reduce the potential difference and electromagnetic interference between modules, making the signal transmission between the wireless radio frequency module 210, microwave radar module 220 and dimming drive module 230 more stable, and reducing the possibility of signal distortion and false triggering.

[0044] This application provides a lighting fixture, including a fixture base, an LED light source, and an integrated microwave radar sensing lighting control circuit 10 according to any embodiment. An integrated metal substrate 100 is fixed to the fixture base, and the output terminal of the dimming drive module 230 is connected to the input terminal of the LED light source. In this embodiment, after the microwave radar module 220 is activated, it begins to emit microwave signals into the surrounding environment; when the microwave signals encounter obstacles or moving objects, they are reflected back, forming reflected signals. After the reflected signals are received by the antenna assembly of the microwave radar module 220, they are transmitted to the wireless radio frequency module 210 for further processing. Then, the MCU unit of the radio frequency chip U5 receives the reflected signals from the microwave radar module 220, performs signal demodulation processing, and analyzes the object's moving speed and distance through an algorithm. Next, the radio frequency chip U5 generates a PWM signal with an adjustable duty cycle of 0-100% based on the detection results. Since the PWM signal output terminal PWM1 of the radio frequency chip U5 is connected to the PWM signal receiving terminal PWM of the dimming drive module 230, when the radio frequency chip U5 generates a PWM signal, the signal is transmitted to the dimming drive module 230. After receiving the PWM signal, the dimming drive module 230 controls the output current to the light source load 300 through its internal dimming chip, thereby achieving dynamic adjustment of the light source brightness. Furthermore, since the wireless radio frequency module 210, microwave radar module 220, and dimming drive module 230 are arranged adjacent to each other on the same end face of the integrated metal substrate 100, forming an integrated structure, the signal transmission path of the entire system is shorter and more direct, reducing the possibility of signal attenuation and interference. Simultaneously, because the integrated metal substrate 100 can act as a heat sink, rapidly dissipating the heat generated by each module, the integrated structure effectively improves the heat dissipation efficiency of the circuit device 200.

[0045] Compared with the prior art, this disclosure has at least the following advantages:

[0046] The aforementioned integrated microwave radar sensing lighting control circuit 10 receives the detection signal from the microwave radar module 220 in real time through the RF chip U5 and triggers a dimming algorithm to output a corresponding PWM control signal to the LED light source, thereby achieving dynamic brightness adjustment of the LED light source. This improves the intelligence level of the integrated microwave radar sensing lighting control circuit 10, achieves energy saving, and enhances the user experience. Furthermore, this application integrates the RF chip U5, the microwave radar module 220, and the integrated metal substrate 100 into a single circuit design, achieving deep integration of signal processing, radar detection, and light source driving. This reduces signal transmission loss and electromagnetic interference, improving the overall performance and stability of the system. Simultaneously, the integrated metal substrate forms a unified thermal management path, improving the heat dissipation efficiency of the components in the circuit, thus ensuring the stable operation of the integrated microwave radar sensing lighting control circuit 10.

[0047] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An integrated microwave radar-sensing lighting control circuit, characterized in that, The invention includes an integrated metal substrate and a circuit device. The circuit device is disposed on the integrated metal substrate and includes a wireless radio frequency module, a microwave radar module, and a dimming drive module. The wireless radio frequency module, the microwave radar module, and the dimming drive module are disposed adjacent to each other on the same end face of the integrated metal substrate to form an integrated structure. The microwave radar module is used to transmit microwave signals and transmit the received reflected signals to the wireless radio frequency module; The dimming drive module is used to receive the PWM signal from the wireless radio frequency module and control the output current to the light source load through the dimming chip; The wireless radio frequency module includes a radio frequency chip and a first filter capacitor. The PWM signal output terminal of the radio frequency chip is connected to the PWM signal receiving terminal of the dimming drive module. The microwave data transmitting terminal of the microwave radar module is connected to the microwave data receiving terminal of the radio frequency chip. One end of the first filter capacitor is connected to the power supply terminal of the radio frequency chip. The power supply terminal of the radio frequency chip is used to connect to an external power supply. The other end of the first filter capacitor is grounded.

2. The integrated microwave radar sensing lighting control circuit according to claim 1, characterized in that, The microwave radar module includes a microwave processing chip and a second filter capacitor. One end of the second filter capacitor is connected to the power supply terminal of the radio frequency chip, and the other end of the second filter capacitor is grounded. The first signal transmitting terminal of the microwave processing chip is connected to the first signal receiving terminal of the radio frequency chip, and the second signal transmitting terminal of the microwave processing chip is connected to the second signal receiving terminal of the radio frequency chip.

3. The integrated microwave radar sensing lighting control circuit according to claim 1, characterized in that, The dimming drive module includes a dimming control circuit and a rectifier circuit. The input terminal of the rectifier circuit is connected to an external power supply, the output terminal of the rectifier circuit is connected to the input terminal of the dimming control circuit, and the output terminal of the dimming control circuit is connected to the light source load.

4. The integrated microwave radar sensing lighting control circuit according to claim 3, characterized in that, The rectifier circuit includes a bridge rectifier unit and an overvoltage protection unit. The input terminal of the overvoltage protection unit is connected to an external power supply, the output terminal of the overvoltage protection unit is connected to the input terminal of the bridge rectifier unit, and the output terminal of the bridge rectifier unit is connected to the input terminal of the dimming control circuit.

5. The integrated microwave radar sensing lighting control circuit according to claim 3, characterized in that, The dimming control circuit includes a dimming control chip and a first voltage divider resistor. The PWM signal output terminal of the radio frequency chip is connected to the PWM signal receiving terminal of the dimming control chip through the first voltage divider resistor.

6. The integrated microwave radar sensing lighting control circuit according to claim 5, characterized in that, The dimming control circuit also includes a third filter capacitor, the first end of which is connected to the PWM signal receiving end of the dimming control chip, and the second end of which is grounded.

7. The integrated microwave radar sensing lighting control circuit according to claim 1, characterized in that, The thermal conductivity of the integrated metal substrate is greater than or equal to 5 W / m·K.

8. The integrated microwave radar sensing lighting control circuit according to claim 1, characterized in that, The integrated metal substrate includes a circuit layer and an insulating layer. The circuit layer is connected to the insulating layer and is used to electrically connect the wireless radio frequency module, the microwave radar module and the dimming drive module to each other.

9. The integrated microwave radar sensing lighting control circuit according to claim 8, characterized in that, The integrated metal substrate further includes a metal substrate connected to the insulating layer. The metal substrate serves as a common grounding layer and heat dissipation channel for the wireless radio frequency module, the microwave radar module, and the dimming drive module.

10. A lighting fixture, characterized in that, The device includes a lamp base, an LED light source, and an integrated microwave radar sensing lighting control circuit as described in any one of claims 1 to 9, wherein the integrated metal substrate is fixed to the lamp base, and the output terminal of the dimming drive module is connected to the input terminal of the LED light source.

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