CN218888736U

CN218888736U - Microwave induction drive circuit, LED photoelectric module and lamp

Info

Publication number: CN218888736U
Application number: CN202222927868.9U
Authority: CN
Inventors: 武良举; 梁锦源
Original assignee: Foshan Weideshi Intelligent Lighting Technology Co ltd
Current assignee: Foshan Weideshi Intelligent Lighting Technology Co ltd
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-04-18
Anticipated expiration: 2032-11-02

Abstract

The application relates to a microwave induction drive circuit, an LED photoelectric module and a lamp, wherein the circuit comprises a preposed adjusting circuit, a microwave induction control circuit and a high-voltage constant-current control circuit, and the high-voltage constant-current control circuit comprises a constant-voltage control circuit and a constant-current control circuit; the microwave-induced control circuit is connected with the front adjusting circuit, the constant-voltage control circuit is respectively connected with the front adjusting circuit and the constant-current control circuit, the constant-current control circuit is respectively connected with the microwave-induced control circuit and the LED light source load, high efficiency, no stroboflash, small size and low manufacturing cost can be realized, the LED light source load is driven by human microwave induction, the circuit structure is simplified, the number of components is reduced, the cost is low, the service life is long, a double-path parallel output mode of high-voltage constant-current output and low-voltage constant-voltage output is realized, stroboflash performance parameters meet related standard requirements, and the LED light source load is driven according to a fourth adjusting signal to realize no flicker or no jitter of light.

Description

Microwave induction drive circuit, LED photoelectric module and lamp

Technical Field

The application relates to the technical field of LED driving, in particular to a microwave induction driving circuit, an LED photoelectric module and a lamp.

Background

With the continuous improvement of the living standard, quality demand and LED illumination industry technology of people, the appearance style and the use function of the LED illumination lamp are correspondingly and iteratively upgraded, from the lamp with the most basic energy-saving illumination function to the illumination lamp with the intelligent control or automatic induction function applied in the current market. Among them, lamps with a function of opening and closing a human body gradually become mainstream products for market application. The LED illuminating lamp product with the microwave induction function has the characteristics of strong radio frequency interference resistance and no influence of temperature, humidity, light, air flow, dust and the like, however, most human body microwave induction illuminating lamps in the industry adopt the technology of an isolating switch type power supply circuit, but the driving power supply circuit of the illuminating lamp product is complex in design and high in manufacturing cost. In addition, a non-isolated high-voltage constant-current output driving power circuit technology with a relatively simple design is adopted in human microwave induction lighting lamps in the market, but the circuit design arrangement or the parameter setting of the component scheme is unreasonable, so that the working stability and the timeliness of microwave induction trigger response of the product are easily influenced to a certain degree in the actual use process of the lighting lamps with the microwave induction.

The strobing of the lamp is a function of the depth of the fluctuation of the luminous flux of the pointing light source. The greater the depth of fluctuation, the more severe the stroboscopic effect, which is directly related to the technical quality of the electric light source. The LED light source lamp bead is easy to age due to the fact that the driving power supply of the lamp is poor in quality and the working voltage of the lamp fluctuates unstably. In addition, the instability of the working power grid frequency may cause the hazard of the stroboscopic effect of the lamp, and further cause the hazard to human health. Therefore, the performance of the stroboscopic effect or the stroboscopic fluctuation depth can be used as one of the standards for determining whether a lamp/electric light source is healthy or not.

In the implementation process, the inventor finds that at least the following problems exist in the conventional technology: in the existing LED driving circuit for microwave induction illumination adopting an isolation type switch power supply, the driving power supply circuit is complex in design, large in circuit structure volume and high in manufacturing cost; in the existing LED driving circuit which adopts non-isolated high-voltage constant-current output and is used for microwave induction illumination, stroboscopic performance parameters are difficult to meet the requirements of relevant standards, and the phenomenon of light flickering or poor dithering easily occurs.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to solve the above problems of the conventional LED driving circuit for microwave induction lighting, it is necessary to provide a microwave induction driving circuit, an LED optoelectronic module and a lamp, which are high in efficiency, free of stroboflash, small in size and low in manufacturing cost, and can implement a human body microwave induction function.

In order to achieve the above object, an embodiment of the present invention provides a microwave induction driving circuit, including:

the pre-adjusting circuit is configured to perform first signal conversion processing on a received external power supply signal to obtain a first adjusting signal;

the microwave induction control circuit is connected with the pre-adjusting circuit and is configured to perform second signal conversion processing on the received first adjusting signal and transmit the second adjusting signal to the microwave induction module; the microwave induction control circuit is also configured to output an induction control signal according to the microwave induction signal transmitted by the microwave induction module;

the high-voltage constant-current control circuit comprises a constant-voltage control circuit and a constant-current control circuit; the constant voltage control circuit is respectively connected with the pre-regulation circuit and the constant current control circuit, and is configured to perform third signal conversion processing on the received first regulation signal and transmit the third regulation signal to the constant current control circuit; the constant current control circuit is respectively connected with the microwave induction control circuit and the LED light source load, and carries out fourth signal conversion processing on the third adjusting signal according to the received induction control signal and transmits the fourth adjusting signal to the LED light source load.

In one embodiment, the constant voltage control circuit comprises a constant voltage control chip, a first constant current parameter setting sub-circuit, a first chip power supply unit and a first filtering sub-circuit;

the first constant current parameter setting sub-circuit is connected with the constant voltage control chip, the input end of the first chip power supply unit is connected with the output end of the front adjusting circuit, the output end of the first chip power supply unit is connected with the constant voltage control chip, the input end of the first filtering sub-circuit is connected with the constant voltage control chip, and the output end of the first filtering sub-circuit is connected with the constant current control circuit.

In one embodiment, the constant voltage control circuit further comprises a sampling voltage division sub-circuit and a first energy storage unit;

one end of the sampling voltage-dividing sub-circuit is connected with the constant-voltage control chip, and the other end of the sampling voltage-dividing sub-circuit is connected with the output end of the first filtering sub-circuit; one end of the first energy storage unit is connected with the constant voltage control chip, and the other end of the first energy storage unit is connected with the output end of the prepositive adjusting circuit.

In one embodiment, the first constant current parameter setting sub-circuit comprises a first resistor and a second resistor; the first chip power supply unit comprises a third resistor, a fourth resistor and a first capacitor; the first filter sub-circuit comprises a first diode and a second capacitor;

the first resistor and the second resistor are connected in parallel between the current sampling end of the constant voltage control chip and the ground wire; the first end of the third resistor is connected with the output end of the pre-adjusting circuit, the second end of the third resistor is connected with the first end of the fourth resistor, the second end of the fourth resistor is respectively connected with the power supply end of the constant voltage control chip and the anode of the first capacitor, and the cathode of the first capacitor is connected with the ground wire;

the positive pole of the first diode is connected with the output end of the constant voltage control chip, the negative pole of the first diode is respectively connected with the constant current control circuit and the positive pole of the second capacitor, and the negative pole of the second capacitor is connected with the ground wire.

In one embodiment, the sampling voltage-dividing sub-circuit comprises a fifth resistor, a sixth resistor, a seventh resistor and a third capacitor; the first energy storage unit comprises a first inductor;

a first end of the fifth resistor is connected with a negative electrode of the first diode, a second end of the fifth resistor is connected with a first end of the sixth resistor, a second end of the sixth resistor is respectively connected with a protection setting end of the constant voltage control chip, a first end of the seventh resistor and a positive electrode of the third capacitor, a second end of the seventh resistor is connected with a ground wire, and a negative electrode of the third capacitor is connected with the ground wire;

the first end of the first inductor is connected with the output end of the constant voltage control chip, and the second end of the first inductor is connected with the output end of the pre-adjusting circuit.

In one embodiment, the constant current control circuit comprises a constant current control chip, a second constant current parameter setting sub-circuit, a second chip power supply unit and a second energy storage unit;

the second constant current parameter setting sub-circuit is connected with the constant current control chip, the input end of the first chip power supply unit is connected with the output end of the constant voltage control circuit, the output end of the first chip power supply unit is connected with the constant current control chip, the first end of the second energy storage unit is connected with the constant current control chip, the second end of the second energy storage unit is connected with the negative electrode of the LED light source load, and the positive electrode of the LED light source load is connected with the output end of the constant voltage control circuit.

In one embodiment, the constant current control circuit further comprises an overvoltage setting sub-circuit and a ripple processing sub-circuit;

the overvoltage setting sub-circuit is connected with the constant current control chip, the first end of the ripple processing sub-circuit is connected with the anode of the LED light source load, and the second end of the ripple processing sub-circuit is connected with the second end of the second energy storage unit.

In one embodiment, the second constant current parameter setting sub-circuit includes an eighth resistor and a ninth resistor; the second chip power supply unit comprises a tenth resistor and an eleventh resistor; the second energy storage unit comprises a second inductor;

the eighth resistor and the ninth resistor are connected between the current sampling end of the constant current control chip and the ground wire in parallel; the first end of the tenth resistor is connected with the power supply end of the constant current control chip, the second end of the tenth resistor is connected with the first end of the eleventh resistor, and the second end of the eleventh resistor is connected with the output end of the constant voltage control circuit; the first end of the second inductor is connected with the output end of the constant current control chip, and the second end of the second inductor is connected with the negative electrode of the LED light source load.

In one embodiment, the overvoltage setting subcircuit includes a twelfth resistor; the ripple processing sub-circuit comprises a fourth capacitor;

the first end of the twelfth resistor is connected with the voltage regulating end of the constant current control chip, and the second end of the twelfth resistor is connected with the ground wire; the anode of the fourth capacitor is connected with the anode of the LED light source load, and the cathode of the fourth capacitor is connected with the second end of the second inductor.

In one embodiment, the constant current control circuit further comprises a second diode; the anode of the second diode is connected with the first end of the second inductor, and the cathode of the second diode is connected with the anode of the LED light source load.

In one embodiment, the microwave induction control circuit comprises a low-voltage constant-voltage conversion unit, a third chip power supply unit, a third energy storage unit and a second filter sub-circuit;

the input end of the third chip power supply unit is connected with the output end of the pre-adjusting circuit, the output end of the third chip power supply unit is connected with the low-voltage constant-voltage conversion unit, the input side of the third energy storage unit is connected with the low-voltage constant-voltage conversion unit, the output side of the third energy storage unit is connected with the input end of the second filter sub-circuit, the output end of the second filter sub-circuit is connected with the power supply end of the microwave induction module, and the output end of the microwave induction module is connected with the constant-current control circuit.

In one embodiment, the microwave induction control circuit further comprises an induction module interface and a third filter sub-circuit;

the induction module interface is used for being connected with the microwave induction module in an inserting mode, the power supply end of the induction module interface is connected with the output end of the second filter sub-circuit, the output end of the induction module interface is connected with the input end of the third filter sub-circuit, and the output end of the third filter sub-circuit is connected with the constant current control circuit.

In one embodiment, the second filtering sub-circuit comprises a first filtering unit and a second filtering unit;

one end of the first filtering unit is connected with the output side of the third energy storage unit, the other end of the first filtering unit is connected with one end of the second filtering unit, and the other end of the second filtering unit is connected with the power supply end of the induction module interface.

In one embodiment, the low voltage constant voltage converting unit includes a low voltage constant voltage converting chip and a thirteenth resistor; the third chip power supply unit comprises a third diode and a fifth capacitor; the third energy storage unit comprises a third inductor, a sixth capacitor, a fourth diode and a fifth diode;

the anode of the third diode is connected with the output end of the pre-adjusting circuit, the cathode of the third diode is connected with the anode of the fifth capacitor, and the cathode of the fifth capacitor is connected with the ground wire;

the positive electrode of a sixth capacitor is connected with the power supply end of the low-voltage constant-voltage conversion chip, the negative electrode of the sixth capacitor is connected with the grounding end of the low-voltage constant-voltage conversion chip, the negative electrode of a fourth diode is connected with the power supply end of the low-voltage constant-voltage conversion chip, and the positive electrode of the fourth diode is connected with the direct-current power supply; the negative electrode of the fifth diode is connected with the negative electrode of the sixth capacitor, the positive electrode of the fifth diode is connected with the ground wire, the first end of the third inductor is connected with the negative electrode of the fifth diode, and the second end of the third inductor is respectively connected with the first filtering unit and the positive electrode of the fourth diode; the internal drain terminal of the low-voltage constant-voltage conversion chip is connected with the cathode of the third diode, the current sampling terminal of the low-voltage constant-voltage conversion chip is connected with the first terminal of the thirteenth resistor, the second terminal of the thirteenth resistor is connected with the grounding terminal of the low-voltage constant-voltage conversion chip, and the output voltage selection terminal of the low-voltage constant-voltage conversion chip is connected with the grounding terminal of the low-voltage constant-voltage conversion chip.

In one embodiment, the first filtering unit includes a seventh capacitor, an eighth capacitor and a fourteenth resistor; the second filtering unit comprises a ninth capacitor;

the positive electrode of the seventh capacitor is connected with the second end of the third inductor, the negative electrode of the seventh capacitor is connected with the ground wire, the positive electrode of the eighth capacitor is connected with the positive electrode of the seventh capacitor, the negative electrode of the eighth capacitor is connected with the ground wire, the first end of the fourteenth resistor is connected with the positive electrode of the eighth capacitor, and the second end of the fourteenth resistor is connected with the ground wire; the positive electrode of the ninth capacitor is connected with the first end of the fourteenth resistor and the power supply end of the induction module interface respectively, and the negative electrode of the ninth capacitor is connected with the ground wire.

In one embodiment, the third filter sub-circuit comprises a fifteenth resistor, a sixteenth resistor and a tenth capacitor;

the first end of the fifteenth resistor is connected with the output end of the induction module interface, and the second end of the fifteenth resistor is connected with the constant current control circuit; the first end of the sixteenth resistor is connected with the first end of the fifteenth resistor, and the second end of the sixteenth resistor is connected with the ground wire; and the anode of the tenth capacitor is connected with the second end of the fifteenth resistor, and the cathode of the tenth capacitor is connected with the ground wire.

In one embodiment, the pre-regulation circuit comprises an overcurrent protection sub-circuit, a surge protection sub-circuit, a rectifier sub-circuit and a fourth filter sub-circuit;

the input end of the over-current protection sub-circuit is used for being connected with an external power supply signal, the output end of the over-current protection sub-circuit is connected with the input side of the surge protection sub-circuit, the output side of the surge protection sub-circuit is connected with the input side of the rectifier sub-circuit, the output end of the rectifier sub-circuit is connected with the input end of the fourth filter sub-circuit, and the output end of the fourth filter sub-circuit is respectively connected with the microwave induction control circuit and the constant voltage control circuit.

In one embodiment, the fourth filtering sub-circuit comprises a third filtering unit and a fourth filtering unit;

the input end of the third filtering unit is connected with the output end of the rectifier sub-circuit, and the output end of the third filtering unit is respectively connected with the microwave induction control circuit and the constant voltage control circuit; the fourth filtering unit is connected between the third filtering unit and the ground wire.

In a second aspect, an embodiment of the present invention further provides an LED photovoltaic module, where the LED photovoltaic module includes a microwave sensing module, an LED light source load, and a microwave sensing driving circuit as described above; the microwave induction driving circuit is respectively connected with the microwave induction module and the LED light source load.

The third aspect, the embodiment of the utility model provides a still provide a lamps and lanterns, lamps and lanterns include as foretell LED photovoltaic module.

One of the above technical solutions has the following advantages and beneficial effects:

in each embodiment of the microwave induction driving circuit, the microwave induction driving circuit comprises a pre-adjusting circuit, a microwave induction control circuit and a high-voltage constant-current control circuit, wherein the high-voltage constant-current control circuit comprises a constant-voltage control circuit and a constant-current control circuit; the microwave induction-based control circuit is connected with the pre-regulation circuit, and the constant voltage control circuit is respectively connected with the pre-regulation circuit and the constant current control circuit; the pre-adjustment circuit is configured to perform first signal conversion processing on a received external power supply signal to obtain a first adjustment signal; the microwave induction control circuit is configured to perform second signal conversion processing on the received first adjusting signal and transmit the second adjusting signal to the microwave induction module; the microwave induction control circuit is also configured to output an induction control signal according to the microwave induction signal transmitted by the microwave induction module; the constant voltage control circuit is configured to perform third signal conversion processing on the received first adjustment signal and transmit the third adjustment signal to the constant current control circuit; the constant current control circuit is respectively connected with the microwave induction control circuit and the LED light source load, and the constant current control circuit carries out fourth signal conversion processing on the third adjusting signal according to the received induction control signal and transmits the fourth adjusting signal to the LED light source load, so that the human body microwave induction driving LED light source load with high efficiency, no stroboflash, small volume and low manufacturing cost is realized. This application is through setting up constant voltage control circuit, constant current control circuit, leading regulating circuit and microwave induction control circuit, the circuit structure has been simplified, make less components and parts quantity, the cost is lower, long service life, connect leading regulating circuit through microwave induction control circuit, constant voltage control circuit connects leading regulating circuit respectively, constant current control circuit, realize high-pressure constant current output and low pressure constant voltage output double-circuit parallel output mode, stroboscopic performance parameter satisfies relevant standard requirement, LED light source load is according to the drive of fourth adjustment signal, it does not have scintillation or does not have the shake to realize the light.

Drawings

FIG. 1 is a schematic diagram of a first circuit configuration of a microwave induction driving circuit according to an embodiment;

FIG. 2 is a schematic diagram of a second circuit structure of the microwave induction driving circuit according to an embodiment;

FIG. 3 is a schematic diagram of a third circuit structure of the microwave induction driving circuit according to an embodiment;

FIG. 4 is a diagram illustrating a fourth circuit configuration of the microwave sensing driver circuit according to an embodiment;

FIG. 5 is a schematic diagram of a fifth circuit configuration of the microwave induction driving circuit according to an embodiment;

FIG. 6 is a diagram illustrating a sixth circuit configuration of the microwave sensing driver circuit according to an embodiment;

FIG. 7 is a seventh circuit diagram illustrating an embodiment of a microwave sensing driver circuit;

FIG. 8 is a diagram illustrating an eighth circuit configuration of the microwave inductive driver circuit in one embodiment;

fig. 9 is a schematic diagram of a ninth circuit structure of the microwave induction driving circuit in one embodiment.

Reference numerals:

100. a pre-regulation circuit; 102. an overcurrent protection sub-circuit; 104. a surge protection sub-circuit; 106. a rectifier sub-circuit; 108. a fourth filter sub-circuit; 200. a microwave induction control circuit; 210. a low-voltage constant-voltage conversion unit; 212. a low-voltage constant-voltage conversion chip; 221. a third chip power supply unit; 222. a third energy storage unit; 223. a second filtering sub-circuit; 2231. a first filtering unit; 2232. a second filtering unit; 224. an induction module interface; 225. a third filter sub-circuit; 300. a high-voltage constant-current control circuit; 310. a constant voltage control circuit; 311. a constant voltage control chip; 312. a first constant current parameter setting sub-circuit; 313. a first chip power supply unit; 314. a first filter sub-circuit; 315. a sampling voltage-dividing sub-circuit; 316. a first energy storage unit; 320. a constant current control circuit; 321. a constant current control chip; 322. a second constant current parameter setting sub-circuit; 323. a second chip power supply unit; 324. a second energy storage unit; 325. an overvoltage setting sub-circuit; 326. a ripple processing sub-circuit;

r1, a first resistor; r2 and a second resistor; r3, a third resistor; r4 and a fourth resistor; r5 and a fifth resistor; r6 and a sixth resistor; r7 and a seventh resistor; r8 and an eighth resistor; r9 and a ninth resistor; r10, tenth resistance; r11 and an eleventh resistor; r12 and a twelfth resistor; r13, thirteenth resistance; r14, fourteenth resistance; r15, a fifteenth resistor; r16, sixteenth resistor; r17, seventeenth resistor; r18 and an eighteenth resistor; r19 and a safety resistor; r20, a piezoresistor; BR1, a full-wave rectifier; c1, a first capacitor; c2, a second capacitor; c3, a third capacitor; c4, a fourth capacitor; c5, a fifth capacitor; c6, a sixth capacitor; c7, a seventh capacitor; c8, an eighth capacitor; c9, ninth capacitor; c10, tenth capacitance; c11 and an eleventh capacitor; c12 and a twelfth capacitor; d1, a first diode; d2, a second diode; d3, a third diode; d4, a fourth diode; d5, a fifth diode; l1, a first inductor; l2 and a second inductor; l3, a third inductor; l4, a fourth inductor; l5 and a fifth inductor.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In addition, the term "plurality" shall mean two as well as more than two.

In a conventional LED driving circuit scheme for microwave induction lighting, an isolated switching power supply type LED driving circuit for microwave induction lighting is usually mainly a flyback switching power supply, and generally includes a rectifying circuit, a power stage circuit and a control circuit, where the rectifying circuit receives ac mains power, rectifies the ac mains power and inputs the rectified ac mains power to the power stage circuit, the power stage circuit performs voltage conversion, and the control circuit is used to control on/off of a main power switching tube in the power stage circuit, thereby implementing constant current driving. In the above manner, the power stage circuit of the flyback switching power supply includes a transformer composed of the primary side and the secondary side, and the transformer occupies a larger volume and has a higher implementation cost. For the drive circuit mode adopting LED non-isolated high-voltage constant-current output, the conversion efficiency of the LED non-isolated high-voltage constant-current output drive circuit is relatively low, or the power factor can be reduced while the power conversion efficiency is improved; or the working stability of the power supply and the timeliness of microwave induction trigger response are affected while higher conversion efficiency and high power factor are realized, so that a phenomenon of light flicker or poor jitter is easily caused in the use process of the LED lamp, or related stroboscopic performance parameters (such as stroboscopic percentage, output waveform frequency, short-term flicker index Pst, stroboscopic effect visualization parameter SVM and the like) of the circuit scheme in the prior art cannot meet the index requirements specified by the latest ERP energy efficiency standard of the European Union.

It should be noted that, according to the product-related inspection requirements of the IEC international electrical safety standard, a stroboscopic percentage (i.e., stroboscopic fluctuation depth) measured by the lamp is lower than 3.2%, which is a limit range without stroboscopic hazard; and the stroboscopic percentage is in a low risk range of 8%, the stroboscopic of the lamp belongs to a safe range, and if the value is higher than 8%, the lighting product can be regarded as unsafe. In addition, if the measured light output waveform frequency f is more than 3125Hz, the no-stroboflash performance requirement of high frequency exemption level can be achieved. In particular, the ERP energy efficiency standard newly promulgated and implemented in the european union has the following main requirements in terms of the stroboscopic performance of the lamp: the short-term flicker index Pst is less than or equal to 1.0, and the stroboscopic effect visualization parameter SVM is less than or equal to 0.4-0.9.

The application provides a microwave induction drive circuit, LED photovoltaic module and lamps and lanterns that can realize human microwave induction function of high efficiency, no stroboscopic performance excellence. The microwave induction driving circuit is a non-isolated LED high-voltage constant-current output driving power supply, and compared with a conventional isolated or non-isolated switch type driving power supply, the microwave induction driving circuit is simple in circuit design, small in number of components, low in cost and long in service life, and not only is the microwave induction driving circuit beneficial to market popularization and application of automatic induction type lighting lamp products, but also is beneficial to improvement of added values of the lamp products. In addition, the LED drive power supply provided by the application adopts a drive circuit design mode of a high-voltage constant-current output and low-voltage constant-voltage output double-circuit parallel scheme technology on one hand, and on the other hand, the optimized setting of functional circuit arrangement such as constant-current voltage stabilization and stroboflash removal is increased, so that the functional effects of deep no stroboflash, high conversion efficiency, high power factor, low standby power consumption, rapidness, timeliness, stability and reliability in microwave trigger responsiveness can be achieved in actual use. In addition, the stroboscopic fluctuation depth performance of the stroboscopic lamp is excellent, if the stroboscopic percentage of the lamp is lower than 3.2%, the light output waveform frequency f is larger than 3125Hz and other performance indexes, the short-term flicker index Pst is smaller than or equal to 1.0, the stroboscopic effect visualization parameter SVM is smaller than or equal to 0.4, and the like can be achieved.

In order to solve the above-mentioned problems of the conventional LED driving circuit for microwave induction lighting, in one embodiment, as shown in fig. 1, a microwave induction driving circuit is provided, which includes a pre-adjustment circuit 100, a microwave induction control circuit 200, and a high-voltage constant-current control circuit 300, where the high-voltage constant-current control circuit 300 includes a constant-voltage control circuit 310 and a constant-current control circuit 320.

The pre-adjustment circuit is configured to perform a first signal conversion process on a received external power supply signal to obtain a first adjustment signal; the microwave induction control circuit 200 is connected to the pre-adjustment circuit 100, and the microwave induction control circuit 200 is configured to perform a second signal conversion process on the received first adjustment signal and transmit the second adjustment signal to the microwave induction module; the microwave sensing control circuit 200 is further configured to output a sensing control signal according to the microwave sensing signal transmitted by the microwave sensing module; the constant voltage control circuit 310 is respectively connected with the pre-adjustment circuit 100 and the constant current control circuit 320, and the constant voltage control circuit 310 is configured to perform a third signal conversion process on the received first adjustment signal and transmit the third adjustment signal to the constant current control circuit 320; the constant current control circuit 320 is respectively connected with the microwave induction control circuit 200 and the LED light source load, and the constant current control circuit 320 performs fourth signal conversion processing on the third adjustment signal according to the received induction control signal and transmits the fourth adjustment signal to the LED light source load.

The pre-adjustment circuit 100 may be configured to perform conversion processing such as rectification and filtering on an input external power signal, so as to obtain a first adjustment signal. The external power signal may be, but is not limited to, a mains power signal, for example, an ac input power signal with an external power signal of 220V. The first adjusting signal is a high-voltage direct-current output signal which is subjected to conversion processing such as rectification and filtering.

The microwave sensing control circuit 200 may be configured to perform a second conversion process on the first adjustment signal (high voltage direct current output signal) output by the pre-adjustment circuit 100, and then output a second adjustment signal, and transmit the second adjustment signal to the microwave sensing module to supply power to the microwave sensing module, thereby ensuring that the normal and stable operation of the microwave sensing module is maintained. The second adjustment signal may be a low voltage constant voltage dc output signal, for example the second adjustment signal may be a 5V constant voltage dc output signal. The microwave induction module can be used for transmitting microwave signals with specific working frequency and carrying out feedback output of corresponding serial port level signals according to the received reflected microwave induction signals. Illustratively, the microwave signal sensing module can communicate by radio waves with different operating emission frequencies, such as 3G, 5.8G, and 24G. The microwave induction signal is an induction signal which is received by the microwave induction module according to the transmitted microwave signal. For example, after the microwave signal emitted by the microwave sensing module is sensed by a human body, the reflected sensing signal is received, and then the microwave sensing signal corresponding to the human body sensing is obtained.

The microwave sensing control circuit 200 may further be configured to receive a microwave sensing signal transmitted by the microwave sensing module, adjust the microwave sensing signal to obtain a sensing control signal, and transmit the sensing control signal to the high-voltage constant-current control circuit 300, so that the high-voltage constant-current control circuit 300 drives the LED light source load to operate according to the sensing control signal. For example, the sensing control signal may be a control signal obtained by filtering or the like the microwave sensing signal.

The high-voltage constant-current control circuit 300 may be configured to convert the first adjustment signal output by the pre-adjustment circuit 100 into a high-voltage constant-current output signal, and further transmit the high-voltage constant-current output signal to the LED light source load according to the sensing control signal, so as to drive the LED light source load to work. The high-voltage constant current control circuit 300 may be divided into a constant voltage control circuit 310 and a constant current control circuit 320. The constant voltage control circuit 310 may be configured to convert the first adjustment signal transmitted by the pre-adjustment circuit 100 into a third signal, so as to obtain a third adjustment signal, and transmit the third adjustment signal to the constant current control circuit 320. The third adjustment signal may be a high voltage constant voltage output signal. Illustratively, the constant voltage control circuit 310 converts the high voltage dc output signal output by the pre-regulator circuit 100 into a high voltage constant voltage output signal after performing a specific constant voltage process.

The constant current control circuit 320 is configured to convert the third adjustment signal transmitted by the constant voltage control circuit 310 into a fourth adjustment signal, so as to obtain a fourth adjustment signal; the constant current control circuit 320 may further transmit a fourth adjustment signal to the LED light source load according to the sensing control signal transmitted by the microwave sensing control circuit 200, so as to drive the LED light source load to work. The fourth adjustment signal may be a high voltage constant current signal. Illustratively, the constant current control circuit 320 performs specific constant current parameter current ripples and the like on the high voltage and constant voltage output signal transmitted by the constant voltage control circuit 310, and transmits the processed output signal to the LED light source load under the control of the sensing control signal, so that the light emitted by the LED light source load has no jitter, and the stroboscopic phenomenon of the LED light source load is improved or eliminated. The LED light source load can be composed of a plurality of LED white light illuminating lamp beads in a specific series-parallel combination arrangement mode.

Specifically, the microwave-based sensing control circuit 200 is connected to the pre-adjustment circuit 100, and the constant voltage control circuit 310 is connected to the pre-adjustment circuit 100 and the constant current control circuit 320, respectively; the method comprises the steps that a pre-adjustment circuit carries out first signal conversion processing on a received external power supply signal to obtain a first adjustment signal; the microwave induction control circuit 200 performs second signal conversion processing on the received first adjustment signal and transmits a second adjustment signal to the microwave induction module; the microwave induction control circuit 200 outputs an induction control signal according to the microwave induction signal transmitted by the microwave induction module; the constant voltage control circuit 310 performs a third signal conversion process on the received first adjustment signal, and transmits a third adjustment signal to the constant current control circuit 320; the constant current control circuit 320 is connected with the microwave induction control circuit 200 and the LED light source load respectively, and the constant current control circuit 320 performs fourth signal conversion processing on the third adjusting signal according to the received induction control signal and transmits the fourth adjusting signal to the LED light source load, so that the high-efficiency, non-stroboscopic, small-size and low-manufacturing-cost human body microwave induction driving of the LED light source load is realized.

In the above embodiment, the constant voltage control circuit 310, the constant current control circuit 320, the pre-adjustment circuit 100 and the microwave induction control circuit 200 are arranged, so that the circuit structure is simplified, the number of components is reduced, the cost is low, the service life is long, the microwave induction control circuit 200 is connected with the pre-adjustment circuit 100, the constant voltage control circuit 310 is respectively connected with the pre-adjustment circuit 100 and the constant current control circuit 320, a two-way parallel output mode of high-voltage constant current output and low-voltage constant voltage output is realized, stroboscopic performance parameters meet the requirements of relevant standards, and the LED light source load is driven according to a fourth adjustment signal to realize no flicker or jitter of light.

In one example, as shown in fig. 2, the constant voltage control circuit 310 includes a constant voltage control chip 311, a first constant current parameter setting sub-circuit 312, a first chip power supply unit 313, and a first filter sub-circuit 314. The first constant current parameter setting sub-circuit 312 is connected to the constant voltage control chip 311, the input terminal of the first chip power supply unit 313 is connected to the output terminal of the pre-adjustment circuit 100, the output terminal of the first chip power supply unit 313 is connected to the constant voltage control chip 311, the input terminal of the first filter sub-circuit 314 is connected to the constant voltage control chip 311, and the output terminal of the first filter sub-circuit 314 is connected to the constant current control circuit 320.

The constant voltage control chip 311 may be a boost type PFC constant voltage driving chip with high efficiency, high PF value, and low THD. For example, the pin number of the constant voltage control chip 311 may be 8 pins. The first pin of the constant voltage control chip 311 may be a Boost output voltage and overvoltage protection setting terminal (FB pin), the second pin may be a chip ground terminal (GND pin), the third pin may be a chip power supply terminal (VCC pin), the fourth pin may be a Boost switching tube current sampling terminal (CS pin), and the fifth pin to the eighth pin may be built-in MOS DRAIN output terminals (DRAIN pins). The first constant current parameter setting sub-circuit 312 may set the constant current parameter according to the magnitude of the input power, and the first chip power supply unit 313 may be configured to convert the first adjustment signal output by the pre-adjustment circuit 100 into a power supply signal meeting the power supply requirement of the constant voltage control chip 311. The first filtering sub-circuit 314 may be configured to filter the signal output by the constant voltage control chip 311 to obtain a third adjustment signal, and transmit the third adjustment signal to the constant current control circuit 320, so as to improve stability and reliability of signal transmission and processing.

Illustratively, as shown in fig. 3, the first constant current parameter setting sub-circuit 312 includes a first resistor R1 and a second resistor R2; the first chip power supply unit 313 includes a third resistor R3, a fourth resistor R4, and a first capacitor C1; the first filter sub-circuit 314 includes a first diode D1 and a second capacitor C2. The first resistor R1 and the second resistor R2 are connected in parallel between the current sampling end of the constant voltage control chip 311 and the ground wire; a first end of the third resistor R3 is connected to the output end of the pre-adjustment circuit 100, a second end of the third resistor R3 is connected to a first end of the fourth resistor R4, a second end of the fourth resistor R4 is respectively connected to the power supply end of the constant voltage control chip 311 and the anode of the first capacitor C1, and the cathode of the first capacitor C1 is connected to the ground; the positive electrode of the first diode D1 is connected to the output end of the constant voltage control chip 311, the negative electrode of the first diode D1 is connected to the constant current control circuit 320 and the positive electrode of the second capacitor C2, respectively, and the negative electrode of the second capacitor C2 is connected to the ground.

The first capacitor C1 and the second capacitor C2 may be, but are not limited to, electrolytic capacitors, and the first capacitor C1 is set based on the first chip power supply unit 313, so that current filtering can be performed on the accessed first adjustment signal, and circuit ripples are eliminated. The second capacitor C2 is set based on the first filter sub-circuit 314, so that current filtering can be performed on the signal output by the constant voltage control chip 311, and circuit ripples are eliminated. The first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 may be but are not limited to chip resistors, and the corresponding resistance values are determined according to the related parameter settings of the specific circuit.

In one example, as shown in fig. 2, the constant voltage control circuit 310 further includes a sampling voltage division sub-circuit 315 and a first energy storage unit 316. One end of the sampling voltage-dividing sub-circuit 315 is connected to the constant-voltage control chip 311, and the other end of the sampling voltage-dividing sub-circuit 315 is connected to the output end of the first filter sub-circuit 314; one end of the first energy storage unit 316 is connected to the constant voltage control chip 311, and the other end of the first energy storage unit 316 is connected to the output end of the pre-adjustment circuit 100.

The first energy storage unit 316 is disposed through the constant voltage control circuit 310, so that the sub-circuits are not interfered with each other during power-on operation, and the whole circuit operates stably.

For example, as shown in fig. 3, the sampling voltage divider circuit 315 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a third capacitor C3; the first energy storage unit 316 includes a first inductor L1. A first end of the fifth resistor R5 is connected to a negative electrode of the first diode D1, a second end of the fifth resistor R5 is connected to a first end of the sixth resistor R6, a second end of the sixth resistor R6 is respectively connected to a protection setting end of the constant voltage control chip 311, a first end of the seventh resistor R7, and a positive electrode of the third capacitor C3, a second end of the seventh resistor R7 is connected to a ground wire, and a negative electrode of the third capacitor C3 is connected to the ground wire; the first end of the first inductor L1 is connected to the output end of the constant voltage control chip 311, and the second end of the first inductor L1 is connected to the output end of the pre-adjustment circuit 100.

The third capacitor C3 may be a patch capacitor, and the capacitance value of the corresponding capacitor may be determined according to the design of the related parameters of the specific circuit. The first inductor L1 may be an energy storage inductor. The fifth resistor R5, the sixth resistor R6, and the seventh resistor R7 may be but are not limited to chip resistors, and the corresponding resistance values are determined according to the related parameter settings of the specific circuit.

In one example, as shown in fig. 4, the constant current control circuit 320 includes a constant current control chip 321, a second constant current parameter setting sub-circuit 322, a second chip power supply unit 323, and a second energy storage unit 324. The second constant current parameter setting sub-circuit 322 is connected to the constant current control chip 321, the input end of the first chip power supply unit 313 is connected to the output end of the constant voltage control circuit 310, the output end of the first chip power supply unit 313 is connected to the constant current control chip 321, the first end of the second energy storage unit 324 is connected to the constant current control chip 321, the second end of the second energy storage unit 324 is connected to the negative electrode of the LED light source load, and the positive electrode of the LED light source load is connected to the output end of the constant voltage control circuit 310.

The constant current control chip 321 may be a high-precision step-down LED constant current driving chip supporting PWM input dimming; for example, the pin number of the constant current control chip 321 may be 8 pins. The first pin of the constant current control chip 321 may be an open protection voltage regulation terminal (ROVP pin), the second pin may be a chip ground terminal (GND pin), the third pin and the sixth pin may be connectionless idle terminals (NC pin), the fourth pin may be a chip high voltage power supply terminal (HV pin), the fifth pin may be an internal high voltage power transistor DRAIN terminal (DRAIN pin), the seventh pin may be a PWM dimming signal input terminal (PWM pin), and the eighth pin may be a current sampling terminal (CS pin). The second constant current parameter setting sub-circuit 322 may set the constant current parameter according to the magnitude of the input power. The second chip power supply unit 323 can be used to convert the third adjustment signal output by the constant voltage control circuit 310 into an input signal meeting the input requirement of the constant current control chip 321. The second energy storage unit 324 may be used to avoid interference during signal transmission. The constant current control circuit 320 is provided with the second energy storage unit 324, so that the sub-circuits are not interfered with each other during power-on operation, and the whole circuit works stably.

Illustratively, as shown in fig. 5, the second constant current parameter setting sub-circuit 322 includes an eighth resistor R8 and a ninth resistor R9; the second chip power supply unit 323 includes a tenth resistor R10 and an eleventh resistor R11; the second energy storage unit 324 includes a second inductor L2. The eighth resistor R8 and the ninth resistor R9 are connected in parallel between the current sampling end of the constant current control chip 321 and the ground line; a first end of the tenth resistor R10 is connected to the power supply end of the constant current control chip 321, a second end of the tenth resistor R10 is connected to a first end of the eleventh resistor R11, and a second end of the eleventh resistor R11 is connected to the output end of the constant voltage control circuit 310; a first end of the second inductor L2 is connected to the output end of the constant current control chip 321, and a second end of the second inductor L2 is connected to the negative electrode of the LED light source load.

Wherein, the second inductor L2 may be an energy storage inductor. The eighth resistor R8, the ninth resistor R9, the tenth resistor R10, and the eleventh resistor R11 may be, but are not limited to, chip resistors, and the corresponding resistance values depend on the specific circuit-related parameter settings.

In one example, as shown in fig. 4, the constant current control circuit 320 further includes an overvoltage setting sub-circuit 325 and a ripple handling sub-circuit 326. The overvoltage setting sub-circuit 325 is connected to the constant current control chip 321, a first end of the ripple processing sub-circuit 326 is connected to the anode of the LED light source load, and a second end of the ripple processing sub-circuit 326 is connected to a second end of the second energy storage unit 324.

The overvoltage setting sub-circuit 325 may be configured to set an open-circuit protection voltage, and the ripple processing sub-circuit 326 may be configured to perform a ripple removing process on the signal output by the constant current control chip 321, so as to output a ripple-free fourth adjustment signal with high stability to the LED light source load.

Illustratively, as shown in fig. 5, the overvoltage setting sub-circuit 325 includes a twelfth resistor R12; the ripple processing sub-circuit 326 includes a fourth capacitance C4. A first end of the twelfth resistor R12 is connected to the voltage regulating end of the constant current control chip 321, and a second end of the twelfth resistor R12 is connected to the ground; the anode of the fourth capacitor C4 is connected to the anode of the LED light source load, and the cathode of the fourth capacitor C4 is connected to the second end of the second inductor L2. Further, the constant current control circuit 320 further includes a second diode D2; the anode of the second diode D2 is connected to the first end of the second inductor L2, and the cathode of the second diode D2 is connected to the anode of the LED light source load.

The fourth capacitor C4 may be but not limited to an electrolytic capacitor, and the fourth capacitor C4 is set based on the ripple processing sub-circuit 326, so that current filtering can be performed on the signal output by the constant current control chip 321, and the circuit signal ripple is eliminated. The twelfth resistor R12 may be, but is not limited to, a chip resistor, and the corresponding resistance value depends on the related parameter setting of the specific circuit.

In one example, as shown in fig. 6, the microwave induction control circuit 200 includes a low-voltage constant-voltage converting unit 210, a third chip power supply unit 221, a third energy storage unit 222, and a second filter sub-circuit 223. The input end of the third chip power supply unit 221 is connected to the output end of the pre-adjustment circuit 100, the output end of the third chip power supply unit 221 is connected to the low-voltage constant-voltage conversion unit 210, the input side of the third energy storage unit 222 is connected to the low-voltage constant-voltage conversion unit 210, the output side of the third energy storage unit 222 is connected to the input end of the second filter sub-circuit 223, the output end of the second filter sub-circuit 223 is connected to the power supply end of the microwave induction module, and the output end of the microwave induction module is connected to the constant-current control circuit 320.

The low voltage constant voltage converting unit 210 may be configured to perform a low voltage constant voltage converting process on the first adjustment signal output by the pre-adjustment circuit 100. The third chip power supply unit 221 is a low-voltage loop power supply circuit, and is configured to convert the first adjustment signal output by the pre-adjustment circuit 100 into a power supply signal meeting the input requirement of the low-voltage constant-voltage conversion unit 210. The third energy storage unit 222 may be used to avoid interference during signal transmission. The third energy storage unit 222 is arranged through the microwave induction control circuit 200, so that the sub-circuits are not interfered with each other in the power-on operation, and the whole circuit works stably. The second filtering sub-circuit 223 may be configured to filter the signal output by the low-voltage constant-voltage conversion unit 210 to obtain a second adjustment signal, and transmit the second adjustment signal to the microwave sensing module, so as to supply power to the microwave sensing module, thereby improving stability and reliability of signal transmission and processing.

In one example, the second filtering sub-circuit 223 includes a first filtering unit 2231 and a second filtering unit 2232. One end of the first filtering unit 2231 is connected to the output side of the third energy storage unit 222, the other end of the first filtering unit 2231 is connected to one end of the second filtering unit 2232, and the other end of the second filtering unit 2232 is connected to the power supply end of the sensing module interface 224. The second filter sub-circuit 223 is provided with a dual filter unit, so that the stability of the direct-current low-voltage parameter of the microwave induction module corresponding to the input rear end can be further enhanced in the working process.

Illustratively, as shown in fig. 7, the low voltage constant voltage converting unit 210 includes a low voltage constant voltage converting chip 212 and a thirteenth resistor R13; the third chip power supply unit 221 includes a third diode D3 and a fifth capacitor C5; the third energy storage unit 222 includes a third inductor L3, a sixth capacitor C6, a fourth diode D4, and a fifth diode D5. The anode of the third diode D3 is connected to the output end of the pre-adjustment circuit 100, the cathode of the third diode D3 is connected to the anode of the fifth capacitor C5, and the cathode of the fifth capacitor C5 is connected to the ground; the positive electrode of the sixth capacitor C6 is connected to the power supply end of the low-voltage constant-voltage conversion chip 212, the negative electrode of the sixth capacitor C6 is connected to the ground end of the low-voltage constant-voltage conversion chip 212, the negative electrode of the fourth diode D4 is connected to the power supply end of the low-voltage constant-voltage conversion chip 212, and the positive electrode of the fourth diode D4 is connected to the direct-current power supply (+ 5V); the cathode of the fifth diode D5 is connected to the cathode of the sixth capacitor C6, the anode of the fifth diode D5 is connected to the ground, the first end of the third inductor L3 is connected to the cathode of the fifth diode D5, and the second end of the third inductor L3 is connected to the anodes of the first filtering unit and the fourth diode D4, respectively; the internal drain terminal of the low-voltage constant-voltage conversion chip 212 is connected to the cathode of the third diode D3, the current sampling terminal of the low-voltage constant-voltage conversion chip 212 is connected to the first terminal of the thirteenth resistor R13, the second terminal of the thirteenth resistor R13 is connected to the ground terminal of the low-voltage constant-voltage conversion chip 212, and the output voltage selection terminal of the low-voltage constant-voltage conversion chip 212 is connected to the ground terminal of the low-voltage constant-voltage conversion chip 212.

The low voltage constant voltage conversion chip 212 may be a low power consumption non-isolated step-down type AC/DC constant voltage chip. For example, the pin count of the low voltage constant voltage conversion chip 212 may be 5 pins. The first pin of the low voltage constant voltage conversion chip 212 may be a chip ground (GND pin), the second pin may be an output voltage selection terminal (SEL pin), the third pin may be a chip power supply terminal (VCC pin), the fourth pin may be a DRAIN terminal (DRAIN pin) of a high voltage power transistor inside the chip, and the fifth pin may be a current sampling terminal (CS pin).

The fifth capacitor C5 may be an electrolytic capacitor, and the fifth capacitor C5 is set based on the third chip power supply unit 221, so that current filtering may be performed on the accessed first adjustment signal, and circuit ripples are eliminated. The sixth capacitor C6 may be a patch capacitor, and the capacitance value of the corresponding capacitor may be determined according to the related parameter settings of the specific circuit. The third inductor L3 may be an energy storage inductor. The third diode D3, the fourth diode D4, and the fifth diode D5 may be general diodes. The thirteenth resistor R13 may be, but is not limited to, a chip resistor, and the corresponding resistance value depends on the related parameter settings of the specific circuit.

Exemplarily, as shown in fig. 7, the first filtering unit includes a seventh capacitor C7, an eighth capacitor C8, and a fourteenth resistor R14; the second filtering unit includes a ninth capacitor C9. The positive electrode of the seventh capacitor C7 is connected to the second end of the third inductor L3, the negative electrode of the seventh capacitor C7 is connected to the ground, the positive electrode of the eighth capacitor C8 is connected to the positive electrode of the seventh capacitor C7, the negative electrode of the eighth capacitor C8 is connected to the ground, the first end of the fourteenth resistor R14 is connected to the positive electrode of the eighth capacitor C8, and the second end of the fourteenth resistor R14 is connected to the ground; the positive electrode of the ninth capacitor C9 is connected to the first end of the fourteenth resistor R14 and the power supply end of the sensing module interface 224, respectively, and the negative electrode of the ninth capacitor C9 is connected to the ground.

The seventh capacitor C7 may be an electrolytic capacitor, and the seventh capacitor C7 is set based on the first filtering unit, so that current filtering may be performed on the signal output by the low-voltage constant-voltage conversion chip 212 to eliminate circuit ripples. The eighth capacitor C8 and the ninth capacitor C9 may be patch capacitors, and the capacitance values of the corresponding capacitors may be determined according to the related parameter settings of the specific circuit. The fourteenth resistor R14 may be, but is not limited to, a chip resistor, and the corresponding resistance value depends on the related parameter setting of the specific circuit.

In one example, as shown in fig. 6, the microwave sensing control circuit 200 further includes a sensing module interface 224 and a third filtering sub-circuit 225. The sensing module interface 224 is used for plugging a microwave sensing module, a power supply end of the sensing module interface 224 is connected with an output end of the second filtering sub-circuit 223, an output end of the sensing module interface 224 is connected with an input end of the third filtering sub-circuit 225, and an output end of the third filtering sub-circuit 225 is connected with the constant current control circuit 320.

The sensing module interface 224 can be used to plug in a microwave sensing module, and the microwave sensing module can be plugged in the sensing module interface 224 by a pin arrangement or a female arrangement, for example. The third filter sub-circuit 225 may be configured to filter the sensing signal output by the microwave sensing module to obtain a sensing control signal, and transmit the sensing control signal to the constant current control circuit 320, so as to improve stability and reliability of signal transmission and processing.

Illustratively, as shown in fig. 7, the third filtering sub-circuit 225 includes a fifteenth resistor R15, a sixteenth resistor R16 and a tenth capacitor C10; a first end of the fifteenth resistor R15 is connected to the output end of the sensing module interface 224, and a second end of the fifteenth resistor R15 is connected to the constant current control circuit 320; a first end of the sixteenth resistor R16 is connected with a first end of the fifteenth resistor R15, and a second end of the sixteenth resistor R16 is connected with the ground wire; the positive electrode of the tenth capacitor C10 is connected to the second end of the fifteenth resistor R15, and the negative electrode of the tenth capacitor C10 is connected to the ground.

The fifteenth resistor R15 and the sixteenth resistor R16 may be, but not limited to, chip resistors, and the corresponding resistance values depend on the related parameter settings of the specific circuit. The tenth capacitor C10 may be, but is not limited to, a patch capacitor, and the capacitance value of the corresponding capacitor may depend on the related parameter setting of the specific circuit.

In one embodiment, as shown in fig. 8, the pre-conditioning circuit 100 includes an over-current protection sub-circuit 102, a surge protection sub-circuit 104, a rectifier sub-circuit 106, and a fourth filter sub-circuit 108. The input end of the over-current protection sub-circuit 102 is used for accessing an external power signal, the output end of the over-current protection sub-circuit 102 is connected to the input side of the surge protection sub-circuit 104, the output side of the surge protection sub-circuit 104 is connected to the input side of the rectifier sub-circuit 106, the output end of the rectifier sub-circuit 106 is connected to the input end of the fourth filter sub-circuit 108, and the output end of the fourth filter sub-circuit 108 is respectively connected to the microwave induction control circuit 200 and the constant voltage control circuit 310.

The over-current protection sub-circuit 102 can be used to perform an over-current protection function on an input external power signal. The surge protection sub-circuit 104 can be used to perform a surge or overvoltage protection function on an input external power signal; the rectifying sub-circuit 106 is used for rectifying an input external power signal and outputting a dc signal. The fourth filtering sub-circuit 108 may be configured to perform filtering processing on the rectified output dc signal, so as to obtain a first adjustment signal, thereby improving stability and reliability of signal transmission and processing.

Illustratively, the fourth filtering sub-circuit 108 includes a third filtering unit and a fourth filtering unit. The input end of the third filtering unit is connected with the output end of the rectifier sub-circuit 106, and the output end of the third filtering unit is respectively connected with the microwave induction control circuit 200 and the constant voltage control circuit 310; the fourth filtering unit is connected between the third filtering unit and the ground wire. By dividing the fourth filtering sub-circuit 108 into two layers of filtering units (i.e., the third filtering unit and the fourth filtering unit), the filtering effect on the rectified signal can be further improved, and the stability and reliability of signal transmission and processing can be further improved.

Illustratively, as shown in fig. 9, the over-current protection sub-circuit 102 may include a fuse resistor R19. The surge protection subcircuit 104 may include a voltage dependent resistor R20 or a transient suppression diode. The rectifying sub-circuit 106 may include a full-wave rectifying device BR1. The fourth filtering sub-circuit 108 may include a seventeenth resistor R17, an eighteenth resistor R18, an eleventh capacitor C11, a twelfth capacitor C12, a fourth inductor L4, and a fifth inductor L5. The positive electrode of the eleventh capacitor C11 is connected to the output end of the full-wave rectifier BR1, the negative electrode of the eleventh capacitor C11 is connected to the ground, the first end of the seventeenth resistor R17 is connected to the positive electrode of the eleventh capacitor C11, the second end of the seventeenth capacitor is connected to the positive electrode of the twelfth capacitor C12, the first end of the fourth inductor L4 is connected to the positive electrode of the eleventh capacitor C11, the second end of the fourth inductor L4 is connected to the positive electrode of the twelfth capacitor C12, the first end of the eighteenth resistor R18 is connected to the ground, the second end of the eighteenth resistor R18 is connected to the negative electrode of the twelfth capacitor C12, the first end of the fifth inductor L5 is connected to the ground, the second end of the fifth inductor L5 is connected to the negative electrode of the twelfth capacitor C12, the negative electrode of the twelfth capacitor C12 is connected to the ground, and the second end of the seventeenth resistor R17 is connected to the constant voltage control circuit 310 and the microwave induction control circuit 200, respectively.

The eleventh capacitor C11 and the twelfth capacitor C12 may be thin film capacitors, the fourth inductor L4 and the fifth inductor L5 may be filter inductors, the seventeenth resistor R17 and the eighteenth resistor R18 may be, but are not limited to, chip resistors, and corresponding resistance values are determined according to specific circuit related parameters.

In the embodiment, on one hand, a driving circuit design mode of a high-voltage constant-current output and low-voltage constant-voltage output double-path parallel scheme technology is adopted, and on the other hand, optimized setting of functional circuit arrangement related to constant-current voltage stabilization, stroboflash removal and the like is added on a local secondary sub-circuit, so that the functional effects of deep no stroboflash, high conversion efficiency, high power factor, low standby power consumption, rapidness, timeliness, stability and reliability in microwave trigger responsiveness can be achieved in actual use.

The front-end adjusting circuit, the high-voltage constant-current control circuit, the microwave induction control circuit and the microwave induction module can be made into an integral circuit board, and can also be made into independent and modularized circuit boards. The connection mode among the prepositive adjusting circuit, the high-voltage constant-current control circuit, the microwave induction control circuit and the microwave induction module can be a pin or nut inserting connection mode or a parallel flat cable plug or socket connection mode.

In one embodiment, an LED photovoltaic module is further provided, where the LED photovoltaic module includes a microwave sensing module, an LED light source load, and a microwave sensing driving circuit as described above; the microwave induction driving circuit is respectively connected with the microwave induction module and the LED light source load.

For the detailed description of the microwave sensing module, the LED light source load, and the microwave sensing driving circuit, please refer to the description of the embodiments, which is not repeated herein.

Specifically, the microwave-based induction control circuit is connected with a pre-regulation circuit, and a constant voltage control circuit is respectively connected with the pre-regulation circuit and a constant current control circuit; the pre-adjustment circuit is configured to perform a first signal conversion process on a received external power supply signal to obtain a first adjustment signal; the microwave induction control circuit carries out second signal conversion processing on the received first adjusting signal and transmits a second adjusting signal to the microwave induction module; the microwave induction control circuit outputs an induction control signal according to a microwave induction signal transmitted by the microwave induction module; the constant voltage control circuit performs third signal conversion processing on the received first adjusting signal and transmits a third adjusting signal to the constant current control circuit; the constant current control circuit is respectively connected with the microwave induction control circuit and the LED light source load, and the constant current control circuit carries out fourth signal conversion processing on the third adjusting signal according to the received induction control signal and transmits the fourth adjusting signal to the LED light source load, so that the human body microwave induction driving LED light source load with high efficiency, no stroboflash, small volume and low manufacturing cost is realized. Through setting up constant voltage control circuit, constant current control circuit, leading regulating circuit and microwave response control circuit, the circuit structure has been simplified for less components and parts quantity, the cost is lower, long service life, through microwave response control circuit connection leading regulating circuit, the constant voltage control circuit is connected leading regulating circuit, constant current control circuit respectively, realize high-pressure constant current output and low pressure constant voltage output double-circuit parallel output mode, stroboscopic performance parameter satisfies relevant standard requirement, LED light source load realizes that the light does not have scintillation or does not have the shake according to the drive of fourth adjustment signal.

In one embodiment, a lamp is further provided, and the lamp comprises the LED photovoltaic module.

For a detailed description of the LED optoelectronic module, please refer to the description of the above embodiments, which is not repeated herein.

The lamp can be but not limited to an LED down lamp, an LED ceiling lamp, an LED embedded ceiling lamp, an LED panel lamp and the like. The LED photoelectric module can be arranged in non-metal shells of plastic, glass, wood and the like with certain thickness, and the detection function technology of the LED photoelectric module is not influenced. The lamp can be widely applied to indoor public lighting occasions such as tunnels, classrooms of underground parking lots, libraries, corridors, offices, public toilets and the like, and application scenes such as advertising lighting and the like.

In the embodiment, the microwave induction driving circuit based on the lamp can achieve the performance indexes that the stroboscopic percentage of the lamp is lower than 3.2%, the light output waveform frequency f is larger than 3125Hz, the short-term flicker index Pst is smaller than or equal to 1.0, the stroboscopic effect visualization parameter SVM is smaller than or equal to 0.4, and the like, and achieves high efficiency and no stroboscopic effect of the lamp. In addition, the microwave induction driving circuit based on the human body microwave induction control technology with lower manufacturing cost not only is beneficial to the market popularization and application of the automatic induction type lighting lamp product, but also is beneficial to improving the added value of the lamp product.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A microwave induction drive circuit, comprising:

a pre-adjustment circuit configured to perform a first signal conversion process on a received external power signal to obtain a first adjustment signal;

the microwave induction control circuit is connected with the preposed adjusting circuit and is configured to perform second signal conversion processing on the received first adjusting signal and transmit a second adjusting signal to a microwave induction module; the microwave induction control circuit is also configured to output an induction control signal according to the microwave induction signal transmitted by the microwave induction module;

the high-voltage constant-current control circuit comprises a constant-voltage control circuit and a constant-current control circuit; the constant voltage control circuit is respectively connected with the pre-adjusting circuit and the constant current control circuit, and is configured to perform third signal conversion processing on the received first adjusting signal and transmit a third adjusting signal to the constant current control circuit; the constant current control circuit is respectively connected with the microwave induction control circuit and the LED light source load, and carries out fourth signal conversion processing on the third adjusting signal according to the received induction control signal and transmits a fourth adjusting signal to the LED light source load.

2. The microwave induction driving circuit according to claim 1, wherein the constant voltage control circuit includes a constant voltage control chip, a first constant current parameter setting sub-circuit, a first chip power supply unit, and a first filter sub-circuit;

the first constant current parameter setting sub-circuit is connected with the constant voltage control chip, the input end of the first chip power supply unit is connected with the output end of the pre-regulation circuit, the output end of the first chip power supply unit is connected with the constant voltage control chip, the input end of the first filter sub-circuit is connected with the constant voltage control chip, and the output end of the first filter sub-circuit is connected with the constant current control circuit.

3. The microwave induction driving circuit according to claim 2, wherein the constant voltage control circuit further comprises a sampling voltage-dividing sub-circuit and a first energy storage unit;

one end of the sampling voltage-dividing sub-circuit is connected with the constant-voltage control chip, and the other end of the sampling voltage-dividing sub-circuit is connected with the output end of the first filtering sub-circuit; one end of the first energy storage unit is connected with the constant voltage control chip, and the other end of the first energy storage unit is connected with the output end of the pre-adjusting circuit.

4. A microwave induction drive circuit according to claim 3 wherein the first constant current parameter setting sub-circuit comprises a first resistor and a second resistor; the first chip power supply unit comprises a third resistor, a fourth resistor and a first capacitor; the first filter sub-circuit comprises a first diode and a second capacitor;

the first resistor and the second resistor are connected in parallel between the current sampling end of the constant voltage control chip and a ground wire; the first end of the third resistor is connected with the output end of the pre-adjusting circuit, the second end of the third resistor is connected with the first end of the fourth resistor, the second end of the fourth resistor is respectively connected with the power supply end of the constant voltage control chip and the anode of the first capacitor, and the cathode of the first capacitor is connected with the ground wire;

the positive electrode of the first diode is connected with the output end of the constant voltage control chip, the negative electrode of the first diode is respectively connected with the constant current control circuit and the positive electrode of the second capacitor, and the negative electrode of the second capacitor is connected with the ground wire.

5. A microwave induction drive circuit according to claim 4 wherein the sampling voltage divider sub-circuit comprises a fifth resistor, a sixth resistor, a seventh resistor and a third capacitor; the first energy storage unit comprises a first inductor;

6. A microwave induction driving circuit according to any one of claims 2 to 5, wherein the constant current control circuit comprises a constant current control chip, a second constant current parameter setting sub-circuit, a second chip power supply unit and a second energy storage unit;

the second constant current parameter setting sub-circuit is connected with the constant current control chip, the input end of the first chip power supply unit is connected with the output end of the constant voltage control circuit, the output end of the first chip power supply unit is connected with the constant current control chip, the first end of the second energy storage unit is connected with the constant current control chip, the second end of the second energy storage unit is connected with the cathode of the LED light source load, and the anode of the LED light source load is connected with the output end of the constant voltage control circuit.

7. The microwave induction driving circuit according to claim 6, wherein the constant current control circuit further comprises an overvoltage setting sub-circuit and a ripple processing sub-circuit;

the overvoltage setting sub-circuit is connected with the constant current control chip, a first end of the ripple wave processing sub-circuit is connected with the anode of the LED light source load, and a second end of the ripple wave processing sub-circuit is connected with a second end of the second energy storage unit.

8. A microwave induction driving circuit according to claim 7, wherein the second constant current parameter setting sub-circuit includes an eighth resistor and a ninth resistor; the second chip power supply unit comprises a tenth resistor and an eleventh resistor; the second energy storage unit comprises a second inductor;

the eighth resistor and the ninth resistor are connected between the current sampling end of the constant current control chip and the ground wire in parallel; a first end of the tenth resistor is connected with a power supply end of the constant current control chip, a second end of the tenth resistor is connected with a first end of the eleventh resistor, and a second end of the eleventh resistor is connected with an output end of the constant voltage control circuit; the first end of the second inductor is connected with the output end of the constant current control chip, and the second end of the second inductor is connected with the negative electrode of the LED light source load.

9. A microwave inductive driver circuit according to claim 8, wherein the overvoltage setting sub-circuit includes a twelfth resistor; the ripple processing sub-circuit comprises a fourth capacitor;

the first end of the twelfth resistor is connected with the voltage regulating end of the constant current control chip, and the second end of the twelfth resistor is connected with the ground wire; and the anode of the fourth capacitor is connected with the anode of the LED light source load, and the cathode of the fourth capacitor is connected with the second end of the second inductor.

10. A microwave induction drive circuit according to claim 9 wherein the constant current control circuit further comprises a second diode; the anode of the second diode is connected with the first end of the second inductor, and the cathode of the second diode is connected with the anode of the LED light source load.

11. The microwave induction driving circuit according to any one of claims 1 to 5, wherein the microwave induction control circuit comprises a low voltage constant voltage conversion unit, a third chip power supply unit, a third energy storage unit and a second filter sub-circuit;

12. The microwave induction drive circuit of claim 11, wherein the microwave induction control circuit further comprises an induction module interface and a third filter sub-circuit;

13. A microwave induction drive circuit according to claim 12, wherein the second filtering sub-circuit comprises a first filtering unit and a second filtering unit;

one end of the first filtering unit is connected with the output side of the third energy storage unit, the other end of the first filtering unit is connected with one end of the second filtering unit, and the other end of the second filtering unit is connected with the power supply end of the interface of the induction module.

14. A microwave induction driving circuit according to claim 13, wherein the low voltage constant voltage converting unit includes a low voltage constant voltage converting chip and a thirteenth resistor; the third chip power supply unit comprises a third diode and a fifth capacitor; the third energy storage unit comprises a third inductor, a sixth capacitor, a fourth diode and a fifth diode;

the positive electrode of the sixth capacitor is connected with the power supply end of the low-voltage constant-voltage conversion chip, the negative electrode of the sixth capacitor is connected with the grounding end of the low-voltage constant-voltage conversion chip, the negative electrode of the fourth diode is connected with the power supply end of the low-voltage constant-voltage conversion chip, and the positive electrode of the fourth diode is connected with the direct-current power supply; a cathode of the fifth diode is connected to a cathode of the sixth capacitor, an anode of the fifth diode is connected to a ground line, a first end of the third inductor is connected to a cathode of the fifth diode, and a second end of the third inductor is connected to anodes of the first filtering unit and the fourth diode respectively; the inside drain terminal of low pressure constant voltage conversion chip is connected the negative pole of third diode, the current sampling end of low pressure constant voltage conversion chip is connected the first end of thirteenth resistance, the second end of thirteenth resistance is connected the earthing terminal of low pressure constant voltage conversion chip, the output voltage of low pressure constant voltage conversion chip selects the end to be connected the earthing terminal of low pressure constant voltage conversion chip.

15. A microwave induction drive circuit according to claim 14 wherein the first filtering unit comprises a seventh capacitor, an eighth capacitor and a fourteenth resistor; the second filtering unit comprises a ninth capacitor;

the positive electrode of the seventh capacitor is connected to the second end of the third inductor, the negative electrode of the seventh capacitor is connected to the ground, the positive electrode of the eighth capacitor is connected to the positive electrode of the seventh capacitor, the negative electrode of the eighth capacitor is connected to the ground, the first end of the fourteenth resistor is connected to the positive electrode of the eighth capacitor, and the second end of the fourteenth resistor is connected to the ground; and the positive electrode of the ninth capacitor is respectively connected with the first end of the fourteenth resistor and the power supply end of the induction module interface, and the negative electrode of the ninth capacitor is connected with the ground wire.

16. A microwave induction drive circuit according to claim 15 wherein the third filter sub-circuit comprises a fifteenth resistor, a sixteenth resistor and a tenth capacitor;

the first end of the fifteenth resistor is connected with the output end of the induction module interface, and the second end of the fifteenth resistor is connected with the constant current control circuit; a first end of the sixteenth resistor is connected with a first end of the fifteenth resistor, and a second end of the sixteenth resistor is connected with the ground wire; and the positive electrode of the tenth capacitor is connected with the second end of the fifteenth resistor, and the negative electrode of the tenth capacitor is connected with the ground wire.

17. A microwave induction drive circuit according to any of claims 1 to 5, characterised in that the pre-conditioning circuit comprises an over-current protection sub-circuit, a surge protection sub-circuit, a rectifier sub-circuit and a fourth filter sub-circuit;

18. A microwave induction drive circuit according to claim 17 wherein the fourth filtering sub-circuit comprises a third filtering unit and a fourth filtering unit;

19. An LED photovoltaic module, comprising a microwave sensing module, an LED light source load, and the microwave sensing driver circuit of any one of claims 1 to 18; the microwave induction driving circuit is respectively connected with the microwave induction module and the LED light source load.

20. A luminaire comprising the LED optoelectronic module of claim 19.