An LED intelligent lighting system

Abstract

The present invention discloses an LED intelligent lighting system, which relates to the field of LED technology. The system includes a microcontroller module, which controls a power conversion module to perform power regulation, provides voltage stabilization for a first LED module and a second LED module in a series state, and controls a constant current regulation module to perform constant current regulation processing to meet the lighting work of the first LED module and the second LED module. The voltage detection module performs voltage sampling, and the first detection module and the second detection module judge the working voltage state of the first LED module and the second LED module according to the signal sampled by the voltage sampling module, and then controls the auxiliary conversion module to perform electric energy compensation processing for the power conversion module, the first LED module or the second LED module according to the voltage size. The LED intelligent lighting system of the present invention can improve the working efficiency of the first LED module and the second LED module under different working voltages, reduce voltage ripple, ensure voltage balance and improve power supply efficiency.

Description

Technical Field

[0001] The present invention relates to the field of LED technology, in particular to an LED intelligent lighting system. Background Art

[0002] With the increasing use of LEDs, LED driver chips, as the core of LED lighting products, are constantly being updated and developed. In existing technologies, to improve the driving efficiency of LED lighting, an LED lighting system consisting of a power factor correction (PFC) converter circuit and a constant current drive circuit is generally used to achieve constant current and voltage stabilization drive control. However, when the PFC converter circuit performs voltage regulation, voltage imbalance between the input and output power is easily generated, resulting in low LED driving efficiency and a certain amount of voltage ripple. Furthermore, when an LED group is composed of multiple LEDs connected in series, the LED resistance varies, resulting in a certain amount of brightness difference between the LED groups during operation, which can easily reduce the service life of the LED group in the long term. Therefore, there is room for improvement. Summary of the Invention

[0003] The embodiments of the present invention provide an LED intelligent lighting system to solve the problems raised in the above background technology.

[0004] According to an embodiment of the present invention, an LED intelligent lighting system is provided, comprising: a power supply changing module, configured to perform isolation power regulation on the input DC power and output a first power and a second power, rectify and filter the first power, and output a third power;

[0005] an auxiliary conversion module connected to the power conversion module, the first detection module, the first LED module, and the second LED module, and configured to rectify, filter, and power-regulate the second electric energy and perform voltage compensation on the third electric energy; and to perform voltage compensation on the second LED module upon receiving a first detection signal output by the first detection module, and to perform voltage compensation on the first LED module upon receiving a second detection signal output by the first detection module;

[0006] a voltage detection module connected to the first LED module and the second LED module, configured to perform voltage detection on the first LED module and the second LED module individually and output a first signal and a second signal, respectively, and perform voltage detection on the first LED module and the second LED module in series connection and output a third signal;

[0007] a first detection module connected to the voltage detection module, configured to perform voltage reduction processing on the first signal and output a first detection signal when the voltage-reduced signal is greater than the second signal, and to perform voltage reduction processing on the second signal and output a second detection signal when the voltage-reduced signal is greater than the first signal;

[0008] a second detection module, connected to the first detection module and the auxiliary conversion module, configured to output a first control signal and control the auxiliary conversion module to perform voltage compensation when the first detection signal and the second detection signal are not received, and output a second control signal and stop the voltage compensation operation when the first detection signal or the second detection signal is received;

[0009] a microcontroller module connected to the power conversion module, the voltage detection module, the constant current regulation module, the first detection module, and the second detection module, configured to receive the first signal, the second signal, the third electric energy, the first detection signal, the second detection signal, the first control signal, and the second control signal, provide a pulse signal, and drive the power conversion module to perform isolated power regulation, the auxiliary conversion module to perform power regulation, and the constant current regulation module to perform constant current regulation;

[0010] A first LED module is connected to the power supply changing module and is used to receive the third electric energy and provide lighting;

[0011] A second LED module is connected to the first LED module and is used to be connected in series with the first LED module to perform lighting work;

[0012] The constant current regulation module is connected to the second LED module and is used to perform current sampling and constant current regulation on the second LED module.

[0013] As a further solution of the present invention: the power conversion module includes a power interface, a first power tube, a second inductor, a first transformer, a first diode and a first capacitor; the micro control module includes a first controller;

[0014] Preferably, the first end of the power interface is connected to the first end of the primary side of the first transformer and is connected to the second end of the primary side of the first transformer and the drain of the first power tube through the second inductor, the source of the first power tube is connected to the second end of the power interface and the ground end, the gate of the first power tube is connected to the IO1 end of the first controller, the first end of the first secondary side of the first transformer is connected to the anode of the first diode, the cathode of the first diode is connected to the first LED module and the first end of the first capacitor, the second end of the first capacitor is connected to the second end of the secondary side of the first transformer, and the second secondary side of the first transformer is connected to the auxiliary conversion module.

[0015] As a further solution of the present invention: the auxiliary conversion module includes a second diode, a first thyristor, a second thyristor, a second capacitor, a second power tube, a first inductor, a third diode, a third capacitor and a seventh thyristor;

[0016] Preferably, the anode of the second diode is connected to the first end of the second secondary side of the first transformer, the cathode of the second diode is connected to the drain of the second power tube and is connected to the second end of the second secondary side of the first transformer, the anode of the third diode, the first end of the third capacitor and one end of the seventh thyristor through the second capacitor, the other end of the seventh thyristor and one end of the first thyristor are both grounded, the cathode of the third diode is connected to the source of the second power tube and is connected to the anode of the second thyristor and the second end of the third capacitor through the first inductor, the cathode of the second thyristor is connected to the other end of the first thyristor and the second end of the first capacitor, the control end of the first thyristor is connected to the second detection module, and the control end of the second thyristor is connected to the control end of the seventh thyristor.

[0017] As a further solution of the present invention: the auxiliary conversion module further includes a sixth thyristor, a fifth thyristor and a fourth capacitor; the first LED module includes a first LED group;

[0018] Preferably, the first end of the sixth thyristor is connected to the second end of the third capacitor, the second end of the sixth thyristor is connected to the first end of the first LED group and the cathode of the first diode through the fourth capacitor, the second end of the first LED group is connected to one end of the fifth thyristor, the other end of the fifth thyristor is connected to the first end of the third capacitor, and the control end of the sixth thyristor is connected to the control end of the fifth thyristor and the first detection module.

[0019] As a further solution of the present invention: the auxiliary conversion module further includes a fourth thyristor, a third thyristor and a fifth capacitor; the second LED module includes a second LED group;

[0020] Preferably, the first end of the fourth thyristor is connected to the second end of the third capacitor, one end of the third thyristor is connected to the first end of the third capacitor, the second end of the fourth thyristor is connected to the first end of the second LED group and the second end of the first LED group through the fifth capacitor, the other end of the third thyristor is connected to the second end of the second LED group, and the control end of the fourth thyristor is connected to the control end of the third thyristor and the first detection module.

[0021] As a further solution of the present invention: the voltage detection module includes a first resistor, a second resistor, a third resistor and a fourth resistor;

[0022] Preferably, the first end of the first resistor is connected to the first end of the first LED group, the second end of the first resistor is connected to the first detection module and the IO9 end of the first controller and is connected to the second end of the first LED group, the first end of the second LED group, the IO3 end of the first controller and the first end of the third resistor through the second resistor, and the second end of the third resistor is connected to the IO10 end of the first controller and is connected to the second end of the second LED group through the fourth resistor.

[0023] As a further solution of the present invention: the first detection module includes a fifth resistor, a fourth diode and a first comparator;

[0024] Preferably, the anode of the fourth diode is connected to the second end of the first resistor through the fifth resistor, the inverting end of the first comparator is connected to the second end of the third resistor, and the output end of the first comparator is connected to the IO4 end of the first controller, the control end of the fourth thyristor and the second detection module.

[0025] As a further solution of the present invention: the first detection module further includes a sixth resistor, a fifth diode and a second comparator;

[0026] Preferably, the anode of the fifth diode is connected to the second end of the third resistor through the sixth resistor, the inverting end of the second comparator is connected to the second end of the first resistor, and the output end of the second comparator is connected to the IO5 end of the first controller, the control end of the sixth thyristor and the second detection module.

[0027] As a further solution of the present invention: the second detection module includes a first logic chip and a first inverter;

[0028] Preferably, the A end and the B end of the first logic chip are connected to the output end of the first comparator and the output end of the second comparator respectively, the Y end of the first logic chip is connected to the control end of the second thyristor, the IO6 end of the first controller and the input end of the first inverter, and the output end of the first inverter is connected to the IO7 end of the first controller and the control end of the first thyristor.

[0029] As a further solution of the present invention: the constant current regulation module includes a seventh resistor, a first operational amplifier, an eighth resistor, a third power tube and a ninth resistor;

[0030] Preferably, the in-phase terminal of the first operational amplifier is connected to the IO8 terminal of the first controller through the seventh resistor, the inverting terminal of the first operational amplifier is connected to the source of the third power tube and grounded through the ninth resistor, the output terminal of the first operational amplifier is connected to the gate of the third power tube through the eighth resistor, and the drain of the third power tube is connected to the second end of the second LED group.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows: the LED intelligent lighting system of the present invention can control the power conversion module by the microcontroller module to perform power regulation, provide voltage stabilization for the first LED module and the second LED module in series state, and at the same time control the constant current regulation module to perform constant current regulation processing to meet the lighting work of the first LED module and the second LED module. The voltage detection module performs voltage sampling, and the first detection module and the second detection module judge the working voltage status of the first LED module and the second LED module according to the signal sampled by the voltage sampling module, and then control the auxiliary conversion module to perform power compensation processing for the power conversion module, the first LED module or the second LED module according to the voltage size, so as to improve the working efficiency of the first LED module and the second LED module under different working voltages, reduce voltage ripple, ensure voltage balance and improve power supply efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A schematic block diagram of the principle of an LED intelligent lighting system provided by an embodiment of the present invention.

[0034] Figure 2 A circuit diagram of an LED intelligent lighting system provided by an embodiment of the present invention.

[0035] Figure 3 This is a circuit diagram of a voltage detection module provided by an embodiment of the present invention.

[0036] Figure 4 This is a first circuit diagram of the first detection module provided by an embodiment of the present invention.

[0037] Figure 5 This is a second circuit diagram of the first detection module provided by an embodiment of the present invention.

[0038] Figure 6 This is a circuit diagram of the second detection module provided by an embodiment of the present invention.

[0039] Figure 7 This is a circuit diagram of a constant current regulation module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] In one embodiment, see Figure 1 , an LED intelligent lighting system, comprising: a power supply changing module 1, for isolating and power-adjusting the input DC power and outputting a first power and a second power, rectifying and filtering the first power, and outputting a third power;

[0042] The auxiliary conversion module 2 is connected to the power conversion module, the first detection module 6, the first LED module 3 and the second LED module 4, and is used to rectify, filter and power-regulate the second electric energy and perform voltage compensation on the third electric energy. Upon receiving the first detection signal output by the first detection module 6, the auxiliary conversion module 2 performs voltage compensation on the second LED module 4. Upon receiving the second detection signal output by the first detection module 6, the auxiliary conversion module 2 performs voltage compensation on the first LED module 3.

[0043] a voltage detection module 5 connected to the first LED module 3 and the second LED module 4, configured to perform voltage detection on the first LED module 3 and the second LED module 4 individually and output a first signal and a second signal, respectively, and to perform voltage detection on the first LED module 3 and the second LED module 4 in series and output a third signal;

[0044] A first detection module 6 is connected to the voltage detection module 5 and is configured to step down the first signal and output a first detection signal when the stepped-down signal is greater than the second signal, and to step down the second signal and output a second detection signal when the stepped-down signal is greater than the first signal;

[0045] The second detection module 7 is connected to the first detection module 6 and the auxiliary conversion module 2, and is configured to output a first control signal and control the auxiliary conversion module 2 to perform voltage compensation when the first detection signal and the second detection signal are not received, and output a second control signal and stop the voltage compensation operation when the first detection signal or the second detection signal is received;

[0046] The microcontroller module 8 is connected to the power conversion module, the voltage detection module 5, the constant current regulation module 9, the first detection module 6, and the second detection module 7, and is configured to receive the first signal, the second signal, the third electric energy, the first detection signal, the second detection signal, the first control signal, and the second control signal, provide a pulse signal, and drive the power conversion module to perform isolated power regulation, the auxiliary conversion module 2 to perform power regulation, and the constant current regulation module 9 to perform constant current regulation;

[0047] The first LED module 3 is connected to the power source changing module 1 and is used to receive the third electric energy and provide lighting;

[0048] The second LED module 4 is connected to the first LED module 3 and is used to be connected in series with the first LED module 3 to perform lighting work;

[0049] The constant current regulation module 9 is connected to the second LED module 4 and is used to perform current sampling and constant current regulation on the second LED module 4 .

[0050] In a specific embodiment, the power change module 1 can adopt a power conversion circuit composed of a power interface, an inductor, a transformer, a field effect transistor, etc., which can perform isolated high-frequency power regulation processing on the input DC power, and perform multi-channel output, and perform rectification and filtering processing on the output power; the auxiliary conversion module 2 can adopt an auxiliary conversion circuit composed of diodes, field effect transistors, inductors, thyristors, etc., which can rectify, filter and power regulate the input power, and control the transmission state of the power, provide power for the first LED module 3, the second LED module 4 or the power conversion module and perform voltage compensation processing; the first LED module 3 can adopt a first LED circuit composed of an LED group to perform lighting work; the second LED module 4 can adopt a second LED circuit composed of an LED group, which is connected in series with the first LED module 3 and performs lighting work; the voltage detection module 5 can adopt a voltage detection circuit composed of resistors, which can perform separate voltage sampling and series voltage sampling on the first LED module 3 and the second LED module 4; the first detection module 6 can adopt a resistor, a diode and a comparator. The first detection circuit can step down the input signal, and compare the voltage of the stepped-down signal with the voltage of the signal output by the voltage detection module 5, and then detect the voltage difference between the first LED module 3 and the second LED module 4; the above-mentioned second detection module 7 can adopt a second detection circuit composed of a logic chip and an inverter, which can perform logical calculations on the input signal and control the auxiliary conversion module 2 to provide compensation power to the power conversion module when the voltages of the first LED module 3 and the second LED module 4 are similar; the above-mentioned micro-control module 8 can adopt a micro-control circuit composed of a single-chip microcomputer, which integrates many components such as an arithmetic unit, a controller, a memory, and an input and output device to realize functions such as signal processing, data storage, module control, and timing control; the above-mentioned constant current regulation module 9 can adopt a constant current regulation circuit composed of an operational amplifier, a resistor and a field effect transistor, which can sample the current of the first LED module 3 and the second LED module 4 in series and adjust the current of the first LED module 3 and the second LED module 4 in series according to the sampled signal and the signal provided by the micro-control module 8, and then perform constant current drive control.

[0051] In another embodiment, see Figure 1 and Figure 2 The power conversion module includes a power interface, a first power tube Q1, a second inductor L2, a first transformer B1, a first diode D1 and a first capacitor C1; the micro control module 8 includes a first controller U1;

[0052] Specifically, the first end of the power interface is connected to the first end of the primary side of the first transformer B1 and is connected to the second end of the primary side of the first transformer B1 and the drain of the first power tube Q1 through the second inductor L2. The source of the first power tube Q1 is connected to the second end of the power interface and the ground end. The gate of the first power tube Q1 is connected to the IO1 end of the first controller U1. The first end of the first secondary side of the first transformer B1 is connected to the anode of the first diode D1. The cathode of the first diode D1 is connected to the first LED module 3 and the first end of the first capacitor C1. The second end of the first capacitor C1 is connected to the second end of the secondary side of the first transformer B1. The second secondary side of the first transformer B1 is connected to the auxiliary conversion module 2.

[0053] In a specific embodiment, the first power tube Q1 can be an N-channel field effect tube; the first controller U1 can be an STM32 single-chip microcomputer.

[0054] Furthermore, the auxiliary conversion module 2 includes a second diode D2, a first thyristor S1, a second thyristor S2, a second capacitor C2, a second power tube Q2, a first inductor L1, a third diode D3, a third capacitor C3 and a seventh thyristor S7;

[0055] Specifically, the anode of the second diode D2 is connected to the first end of the second secondary side of the first transformer B1, the cathode of the second diode D2 is connected to the drain of the second power tube Q2 and is connected to the second end of the second secondary side of the first transformer B1, the anode of the third diode D3, the first end of the third capacitor C3 and one end of the seventh thyristor S7 through the second capacitor C2. The other end of the seventh thyristor S7 and one end of the first thyristor S1 are both grounded. The cathode of the third diode D3 is connected to the source of the second power tube Q2 and is connected to the anode of the second thyristor S2 and the second end of the third capacitor C3 through the first inductor L1. The cathode of the second thyristor S2 is connected to the other end of the first thyristor S1 and the second end of the first capacitor C1. The control end of the first thyristor S1 is connected to the second detection module 7, and the control end of the second thyristor S2 is connected to the control end of the seventh thyristor S7.

[0056] In a specific embodiment, the first thyristor S1 and the seventh thyristor S7 can both be bidirectional thyristors; the second thyristor S2 can be a unidirectional thyristor; the second power tube Q2 can be an N-channel field effect tube, which is combined with the second capacitor C2, the third diode D3, the first inductor L1 and the third capacitor C3 to form a Buck circuit for power regulation.

[0057] Furthermore, the auxiliary conversion module 2 further includes a sixth thyristor S6, a fifth thyristor S5 and a fourth capacitor C4; the first LED module 3 includes a first LED group;

[0058] Specifically, the first end of the sixth thyristor S6 is connected to the second end of the third capacitor C3, the second end of the sixth thyristor S6 is connected to the first end of the first LED group and the cathode of the first diode D1 through the fourth capacitor C4, the second end of the first LED group is connected to one end of the fifth thyristor S5, the other end of the fifth thyristor S5 is connected to the first end of the third capacitor C3, and the control end of the sixth thyristor S6 is connected to the control end of the fifth thyristor S5 and the first detection module 6.

[0059] In a specific embodiment, both the fifth thyristor S5 and the sixth thyristor S6 may be bidirectional thyristors, and the sixth thyristor S6 cooperates with the fourth capacitor C4 to perform power compensation processing.

[0060] Furthermore, the auxiliary conversion module 2 further includes a fourth thyristor S4, a third thyristor S3 and a fifth capacitor C5; the second LED module 4 includes a second LED group;

[0061] Specifically, the first end of the fourth thyristor S4 is connected to the second end of the third capacitor C3, one end of the third thyristor S3 is connected to the first end of the third capacitor C3, the second end of the fourth thyristor S4 is connected to the first end of the second LED group and the second end of the first LED group through the fifth capacitor C5, the other end of the third thyristor S3 is connected to the second end of the second LED group, and the control end of the fourth thyristor S4 is connected to the control end of the third thyristor S3 and the first detection module 6.

[0062] In a specific embodiment, both the third thyristor S3 and the fourth thyristor S4 may be bidirectional thyristors, and the fourth thyristor S4 cooperates with the fifth capacitor C5 to perform power compensation processing.

[0063] In another embodiment, see Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , the voltage detection module 5 includes a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4;

[0064] Specifically, the first end of the first resistor R1 is connected to the first end of the first LED group, the second end of the first resistor R1 is connected to the first detection module 6 and the IO9 end of the first controller U1 and is connected to the second end of the first LED group, the first end of the second LED group, the IO3 end of the first controller U1 and the first end of the third resistor R3 through the second resistor R2, and the second end of the third resistor R3 is connected to the IO10 end of the first controller U1 and is connected to the second end of the second LED group through the fourth resistor R4.

[0065] In a specific embodiment, the first resistor R1 and the second resistor R2 perform voltage sampling on the first LED group, and the third resistor R3 and the fourth resistor R4 perform voltage sampling on the second LED group.

[0066] Furthermore, the first detection module 6 includes a fifth resistor R5, a fourth diode D4 and a first comparator A1;

[0067] Specifically, the anode of the fourth diode D4 is connected to the second end of the first resistor R1 through the fifth resistor R5, the inverting end of the first comparator A1 is connected to the second end of the third resistor R3, and the output end of the first comparator A1 is connected to the IO4 end of the first controller U1, the control end of the fourth thyristor S4 and the second detection module 7.

[0068] In a specific embodiment, the fifth resistor R5 and the fourth diode D4 perform voltage reduction processing on the input signal; the first comparator A1 can be an LM358 comparator.

[0069] Furthermore, the first detection module 6 further includes a sixth resistor R6, a fifth diode D5 and a second comparator A2;

[0070] Specifically, the anode of the fifth diode D5 is connected to the second end of the third resistor R3 through the sixth resistor R6, the inverting end of the second comparator A2 is connected to the second end of the first resistor R1, and the output end of the second comparator A2 is connected to the IO5 end of the first controller U1, the control end of the sixth thyristor S6 and the second detection module 7.

[0071] In a specific embodiment, the sixth diode and the fifth diode D5 perform voltage reduction processing on the input signal; the second comparator A2 can be an LM358 comparator.

[0072] Furthermore, the second detection module 7 includes a first logic chip U2 and a first inverter INV1;

[0073] Specifically, the A end and the B end of the first logic chip are connected to the output end of the first comparator A1 and the output end of the second comparator A2 respectively, the Y end of the first logic chip is connected to the control end of the second thyristor S2, the IO6 end of the first controller U1 and the input end of the first inverter INV1, and the output end of the first inverter INV1 is connected to the IO7 end of the first controller U1 and the control end of the first thyristor S1.

[0074] In a specific embodiment, the first logic chip may be an OR gate chip; and the first inverter INV1 may be an NOT gate chip.

[0075] Furthermore, the constant current regulation module 9 includes a seventh resistor R7, a first operational amplifier OP1, an eighth resistor R8, a third power tube Q3 and a ninth resistor R9;

[0076] Specifically, the non-inverting terminal of the first operational amplifier OP1 is connected to the IO8 terminal of the first controller U1 through the seventh resistor R7, the inverting terminal of the first operational amplifier OP1 is connected to the source of the third power tube Q3 and grounded through the ninth resistor R9, the output terminal of the first operational amplifier OP1 is connected to the gate of the third power tube Q3 through the eighth resistor R8, and the drain of the third power tube Q3 is connected to the second end of the second LED group.

[0077] In a specific embodiment, the first operational amplifier OP1 may be an LM2902 operational amplifier; and the third power transistor Q3 may be an N-channel field effect transistor.

[0078] In an LED intelligent lighting system according to the present embodiment, a power interface is used to connect DC power, and the IO1 terminal of the first controller U1 drives the conduction state of the first power tube Q1, cooperates with the second inductor L2 and the first transformer B1 to perform isolated high-frequency power regulation and output the first power and the second power respectively. The first power is rectified and filtered by the first diode D1 and the first capacitor C1 to output the third power, and the second power is rectified and filtered by the second diode D2 and the second capacitor C2. The IO2 terminal of the first controller U1 drives the conduction state of the second power tube Q2, and cooperates with the third diode D3, the third capacitor C3 and the first inductor L1 to perform power regulation. Initially, the first inverter INV1 triggers the first thyristor S1 to turn on, and the third power is transmitted to the series state The first LED group and the second LED group, the IO8 end of the first controller U1 provides a pulse signal to the first operational amplifier OP1, so that the first operational amplifier OP1 cooperates with the eighth resistor R8, the seventh resistor R7 and the ninth resistor R9 to drive the conduction state of the third power tube Q3, and then performs constant current regulation on the first LED group and the second LED group in series state, the first resistor R1 and the second resistor R2 perform voltage sampling on the first LED group and output a first signal, the third resistor R3 and the fourth resistor R4 perform voltage sampling on the second LED group and output a second signal, the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 perform voltage sampling in series and output a third signal, the first signal is stepped down through the fifth resistor R5 and the fourth diode D4 and When the voltage of the first LED group is greater than the second signal, the first comparator A1 outputs a high level, that is, a first detection signal, indicating that the voltage of the first LED group is greater than the voltage of the second LED group at this time. The first detection signal triggers the fourth thyristor S4 and the third thyristor S3 to turn on, and is received by the IO4 terminal of the first controller U1 at the same time, so that the first controller U1 controls the conduction state of the second power tube Q2 according to the second signal, adjusts the power provided by the auxiliary conversion module 2, and provides compensation power to the second LED group through the third capacitor C3 and the fifth capacitor C5, so that the voltage of the first LED group and the second LED group is balanced. Similarly, when the second signal is greater than the first signal after being stepped down by the sixth resistor R6 and the fifth diode D5, the second comparator A2 outputs a second detection signal to control the sixth thyristor S6 and the fifth thyristor S5 are turned on, and the first controller U1 controls the conduction state of the second power tube Q2 according to the first signal. The auxiliary conversion module 2 performs voltage compensation for the first LED group to balance the voltages of the first LED group and the second LED group. When the first comparator A1 and the second comparator A2 are both at low levels, it means that the voltage of the first LED group is close to the voltage of the second LED group. The first logic chip outputs the first control signal to control the second thyristor S2 and the seventh thyristor S7 to be turned on, and the first thyristor S1 is turned off. The IO6 terminal of the first controller U1 receives the signal. At this time, the first controller U1 will adjust the conduction state of the second power tube Q2 according to the third signal, and then control the electric energy output by the auxiliary conversion module 2 to perform voltage compensation processing on the third electric energy.Improve the power supply efficiency of the first LED group and the second LED group in series connection.

[0079] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0080] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An LED intelligent lighting system, characterized in that: The system includes: a power supply changing module, configured to perform isolation power regulation on the DC power input and output a first power and a second power, rectify and filter the first power, and output a third power; an auxiliary conversion module connected to the power conversion module, the first detection module, the first LED module, and the second LED module, and configured to rectify, filter, and power-regulate the second electric energy and perform voltage compensation on the third electric energy; and to perform voltage compensation on the second LED module upon receiving a first detection signal output by the first detection module, and to perform voltage compensation on the first LED module upon receiving a second detection signal output by the first detection module; a voltage detection module connected to the first LED module and the second LED module, configured to perform voltage detection on the first LED module and the second LED module individually and output a first signal and a second signal, respectively, and perform voltage detection on the first LED module and the second LED module in series connection and output a third signal; a first detection module connected to the voltage detection module, configured to perform voltage reduction processing on the first signal and output a first detection signal when the voltage-reduced signal is greater than the second signal, and to perform voltage reduction processing on the second signal and output a second detection signal when the voltage-reduced signal is greater than the first signal; a second detection module, connected to the first detection module and the auxiliary conversion module, configured to output a first control signal and control the auxiliary conversion module to perform voltage compensation on the third electric energy when the first detection signal and the second detection signal are not received, and output a second control signal and control the auxiliary conversion module to stop performing voltage compensation on the third electric energy when the first detection signal or the second detection signal is received; a microcontroller module connected to the power conversion module, the voltage detection module, the constant current regulation module, the first detection module, and the second detection module, configured to receive the first signal, the second signal, the third electric energy, the first detection signal, the second detection signal, the first control signal, and the second control signal, provide a pulse signal, and drive the power conversion module to perform isolated power regulation, the auxiliary conversion module to perform power regulation, and the constant current regulation module to perform constant current regulation; A first LED module is connected to the power supply changing module and is used to receive the third electric energy and provide lighting; A second LED module is connected to the first LED module and is used to be connected in series with the first LED module to perform lighting work; The constant current regulation module is connected to the second LED module and is used to perform current sampling and constant current regulation on the second LED module.

2. The LED intelligent lighting system according to claim 1, characterized in that: The power conversion module includes a power interface, a first power tube, a second inductor, a first transformer, a first diode and a first capacitor; the micro control module includes a first controller; The first end of the power interface is connected to the first end of the primary side of the first transformer and is connected to the second end of the primary side of the first transformer and the drain of the first power tube through the second inductor. The source of the first power tube is connected to the second end of the power interface and the ground end. The gate of the first power tube is connected to the IO1 end of the first controller. The first end of the first secondary side of the first transformer is connected to the anode of the first diode. The cathode of the first diode is connected to the first LED module and the first end of the first capacitor. The second end of the first capacitor is connected to the second end of the secondary side of the first transformer. The second secondary side of the first transformer is connected to the auxiliary conversion module.

3. The LED intelligent lighting system according to claim 2, characterized in that: The auxiliary conversion module includes a second diode, a first thyristor, a second thyristor, a second capacitor, a second power tube, a first inductor, a third diode, a third capacitor and a seventh thyristor; The anode of the second diode is connected to the first end of the second secondary side of the first transformer, the cathode of the second diode is connected to the drain of the second power tube and is connected to the second end of the second secondary side of the first transformer, the anode of the third diode, the first end of the third capacitor and one end of the seventh thyristor through the second capacitor, the other end of the seventh thyristor and one end of the first thyristor are both grounded, the cathode of the third diode is connected to the source of the second power tube and is connected to the anode of the second thyristor and the second end of the third capacitor through the first inductor, the cathode of the second thyristor is connected to the other end of the first thyristor and the second end of the first capacitor, the control end of the first thyristor is connected to the second detection module, and the control end of the second thyristor is connected to the control end of the seventh thyristor.

4. The LED intelligent lighting system according to claim 3, characterized in that: The auxiliary conversion module further includes a sixth thyristor, a fifth thyristor and a fourth capacitor; the first LED module includes a first LED group; The first end of the sixth thyristor is connected to the second end of the third capacitor, the second end of the sixth thyristor is connected to the first end of the first LED group and the cathode of the first diode through the fourth capacitor, the second end of the first LED group is connected to one end of the fifth thyristor, the other end of the fifth thyristor is connected to the first end of the third capacitor, and the control end of the sixth thyristor is connected to the control end of the fifth thyristor and the first detection module.

5. The LED intelligent lighting system according to claim 4, characterized in that: The auxiliary conversion module further includes a fourth thyristor, a third thyristor and a fifth capacitor; the second LED module includes a second LED group; The first end of the fourth thyristor is connected to the second end of the third capacitor, one end of the third thyristor is connected to the first end of the third capacitor, the second end of the fourth thyristor is connected to the first end of the second LED group and the second end of the first LED group through the fifth capacitor, the other end of the third thyristor is connected to the second end of the second LED group, and the control end of the fourth thyristor is connected to the control end of the third thyristor and the first detection module.

6. The LED intelligent lighting system according to claim 5, characterized in that: The voltage detection module includes a first resistor, a second resistor, a third resistor and a fourth resistor; The first end of the first resistor is connected to the first end of the first LED group, the second end of the first resistor is connected to the first detection module and the IO9 end of the first controller and is connected to the second end of the first LED group, the first end of the second LED group, the IO3 end of the first controller and the first end of the third resistor through the second resistor, and the second end of the third resistor is connected to the IO10 end of the first controller and the second end of the second LED group through the fourth resistor.

7. The LED intelligent lighting system according to claim 6, characterized in that: The first detection module includes a fifth resistor, a fourth diode and a first comparator; The anode of the fourth diode is connected to the second end of the first resistor through the fifth resistor, the inverting end of the first comparator is connected to the second end of the third resistor, and the output end of the first comparator is connected to the IO4 end of the first controller, the control end of the fourth thyristor and the second detection module.

8. The LED intelligent lighting system according to claim 7, characterized in that: The first detection module further includes a sixth resistor, a fifth diode and a second comparator; The anode of the fifth diode is connected to the second end of the third resistor through the sixth resistor, the inverting end of the second comparator is connected to the second end of the first resistor, and the output end of the second comparator is connected to the IO5 end of the first controller, the control end of the sixth thyristor and the second detection module.

9. The LED intelligent lighting system according to claim 8, characterized in that: The second detection module includes a first logic chip and a first inverter; The A and B terminals of the first logic chip are connected to the output terminal of the first comparator and the output terminal of the second comparator respectively, the Y terminal of the first logic chip is connected to the control terminal of the second thyristor, the IO6 terminal of the first controller and the input terminal of the first inverter, and the output terminal of the first inverter is connected to the IO7 terminal of the first controller and the control terminal of the first thyristor.

10. The LED intelligent lighting system according to claim 5, characterized in that: The constant current regulation module includes a seventh resistor, a first operational amplifier, an eighth resistor, a third power tube and a ninth resistor; The non-inverting terminal of the first operational amplifier is connected to the IO8 terminal of the first controller through the seventh resistor, the inverting terminal of the first operational amplifier is connected to the source of the third power tube and grounded through the ninth resistor, the output terminal of the first operational amplifier is connected to the gate of the third power tube through the eighth resistor, and the drain of the third power tube is connected to the second end of the second LED group.

Images