LED intelligent lighting system

Abstract

The invention discloses an LED intelligent lighting system, which relates to the technical field of LEDs, and comprises a micro-control module for controlling a power supply conversion module to carry out power regulation, providing stable voltage for a first LED module and a second LED module which are connected in series, and simultaneously controlling a constant current regulation module to carry out constant current regulation processing so as to meet the lighting work of the first LED module and the second LED module. The voltage detection module carries out voltage sampling, the first detection module and the second detection module judge the working voltage states of the first LED module and the second LED module according to signals sampled by the voltage sampling module, and then the auxiliary conversion module is controlled to carry out electric energy compensation processing on the power supply conversion module, the first LED module or the second LED module according to the magnitude of the voltage. According to the LED intelligent lighting system, the working efficiency of the first LED module and the second LED module under different working voltages can be improved, voltage ripples are reduced, voltage balance is ensured, and the power supply efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of LEDs, and specifically to an LED intelligent lighting system. Background Art

[0002] With the continuous popularization and use of LEDs, as the core of LED lighting products, LED driver chips are constantly updated and developed. In the prior art, to improve the driving efficiency of LED lighting, an LED lighting system generally composed of a power factor correction conversion circuit and a constant current driving circuit is adopted to achieve constant current and voltage stabilization driving control. However, when the power factor correction conversion circuit performs voltage stabilization adjustment, voltage imbalance is likely to occur between the input and output powers, resulting in low driving efficiency for the LEDs and certain voltage ripples. Moreover, when the LED group is composed of multiple groups of LEDs connected in series, due to certain differences in the LED resistances, there are certain brightness differences when the LED group is working, which is likely to reduce the service life of the LED group in the long term. Therefore, it needs to be improved. Summary of the Invention

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

[0004] According to an embodiment of the present invention, an LED intelligent lighting system is provided, including: a power conversion module, configured to perform isolated power adjustment on the input DC electrical energy and output first electrical energy and second electrical energy, rectify and filter the first electrical energy, and output third electrical energy;

[0005] An auxiliary conversion module, connected to the power conversion module, the first detection module, the first LED module, and the second LED module, configured to rectify, filter, and perform power adjustment on the second electrical energy and perform voltage compensation on the third electrical energy. When receiving the first detection signal output by the first detection module, it performs voltage compensation on the second LED module. When receiving the second detection signal output by the first detection module, it performs voltage compensation on the first LED module;

[0006] A voltage detection module, connected to the first LED module and the second LED module, configured to separately detect the voltages of the first LED module and the second LED module and output a first signal and a second signal respectively, and detect the voltage of 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 step down the first signal and output a first detection signal when the stepped-down signal is greater than the second signal, step down the second signal and output a second detection signal when the stepped-down signal is greater than the first signal;

[0008] The second detection module, connected to the first detection module and the auxiliary conversion module, is 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] The micro-control 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, 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 to perform power regulation and the constant current regulation module to perform constant current regulation;

[0010] The first LED module, connected to the power change module, is configured to receive the third electric energy and perform lighting;

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

[0012] The constant current regulation module, connected to the second LED module, is configured 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 transistor, 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 transistor through the second inductor, the source of the first power transistor is connected to the second end of the power interface and the ground terminal, the gate of the first power transistor is connected to the IO1 terminal 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 a 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 transistor, 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 transistor 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 transistor 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 aspect 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 aspect 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 aspect 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 terminal 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 terminal of the first controller and the first end of the third resistor through the second resistor. The second end of the third resistor is connected to the IO10 terminal 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 input terminal of the first comparator is connected to the second end of the third resistor, and the output terminal of the first comparator is connected to the IO4 terminal of the first controller, the control terminal 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 input terminal of the second comparator is connected to the second end of the first resistor, and the output terminal of the second comparator is connected to the IO5 terminal of the first controller, the control terminal 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 terminal and the B terminal of the first logic chip are respectively connected to the output terminal of the first comparator and the output terminal of the second comparator, 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.

[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 transistor and a ninth resistor;

[0030] Preferably, the non-inverting input terminal of the first operational amplifier is connected to the IO8 terminal of the first controller through the seventh resistor, the inverting input terminal of the first operational amplifier is connected to the source electrode of the third power transistor and grounded through the ninth resistor, the output terminal of the first operational amplifier is connected to the gate electrode of the third power transistor through the eighth resistor, and the drain electrode of the third power transistor 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 micro-control module to adjust the power, provide a stable voltage for the first LED module and the second LED module in series, 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 samples the voltage, and the first detection module and the second detection module judge the working voltage states of the first LED module and the second LED module according to the signals 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 magnitude, so as to improve the working efficiency of the first LED module and the second LED module under different working voltages, reduce the voltage ripple, ensure voltage balance and improve the 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 will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

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

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

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

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

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

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

[0039] Figure 7 It is a circuit diagram of the constant current regulation module provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] In one embodiment, please refer to Figure 1 , an LED intelligent lighting system includes: a power conversion module 1, configured to perform isolated power regulation on the input DC electrical energy and output first electrical energy and second electrical energy, rectify and filter the first electrical energy, and output third electrical energy;

[0042] An auxiliary conversion module 2, connected to the power conversion module, the first detection module 6, the first LED module 3, and the second LED module 4, configured to rectify, filter, and perform power regulation on the second electrical energy and perform voltage compensation on the third electrical energy. When receiving the first detection signal output by the first detection module 6, it performs voltage compensation on the second LED module 4. When receiving the second detection signal output by the first detection module 6, it 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 separately detect the voltages of the first LED module 3 and the second LED module 4 and output a first signal and a second signal respectively, and detect the voltage of the series-connected first LED module 3 and second LED module 4 and output a third signal;

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

[0045] A second detection module 7, connected to the first detection module 6 and the auxiliary conversion module 2, configured to output a first control signal and control the auxiliary conversion module 2 to perform voltage compensation when neither the first detection signal nor the second detection signal is received, and output a second control signal and stop the voltage compensation work when the first detection signal or the second detection signal is received;

[0046] A micro control module 8, 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, configured to receive the first signal, the second signal, the third electrical energy, the first detection signal, the second detection signal, the first control signal, and the second control signal, provide pulse signals, 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 supply change module 1 and is used to receive the third electric energy and perform 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 and 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 above-mentioned power supply 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 isolation high-frequency power regulation processing on the input DC electric energy, perform multiple outputs, and perform rectification and filtering processing on the output electric energy; the above-mentioned auxiliary conversion module 2 can adopt an auxiliary conversion circuit composed of a diode, a field effect transistor, an inductor, a thyristor, etc., which can perform rectification, filtering and power regulation processing on the input electric energy, control the transmission state of the electric energy, provide electric energy for the first LED module 3, the second LED module 4 or the power conversion module and perform voltage compensation processing; the above-mentioned first LED module 3 can adopt a first LED circuit composed of an LED group to perform lighting work; the above-mentioned second LED module 4 can adopt a second LED circuit composed of an LED group, be connected in series with the first LED module 3 and perform lighting work; the above-mentioned 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 above-mentioned first detection module 6 can adopt a first detection circuit composed of a resistor, a diode and a comparator, which can perform step-down processing on the input signal, and compare the voltage magnitude of the signal after step-down with 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 logic calculation on the input signal and control the auxiliary conversion module 2 to provide compensated electric energy for 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 / output unit, and realizes functions such as signal processing, data storage, module control, timing control, etc.; 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 perform current sampling on the first LED module 3 and the second LED module 4 in series connection and adjust the current of the first LED module 3 and the second LED module 4 in series connection 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, please refer to 1 andFigure 2 , the power conversion module includes a power interface, a first power transistor 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 transistor Q1 through the second inductor L2. The source of the first power transistor Q1 is connected to the second end of the power interface and the ground terminal. The gate of the first power transistor Q1 is connected to the IO1 terminal 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 a 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 above-mentioned first power transistor Q1 can be selected as an N-channel field effect transistor; the above-mentioned first controller U1 can be selected as an STM32 single-chip microcomputer.

[0054] Further, 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 transistor 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 transistor 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 transistor 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 terminal of the first thyristor S1 is connected to the second detection module 7. The control terminal of the second thyristor S2 is connected to the control terminal of the seventh thyristor S7.

[0056] In a specific embodiment, the above-mentioned first thyristor S1 and seventh thyristor S7 can both be selected as bidirectional thyristors; the above-mentioned second thyristor S2 can be selected as a unidirectional thyristor; the above-mentioned second power transistor Q2 can be selected as an N-channel field effect transistor, and cooperate 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] Further, 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, a first end of the sixth thyristor S6 is connected to a second end of the third capacitor C3, a second end of the sixth thyristor S6 is connected to a first end of the first LED group and a cathode of the first diode D1 through the fourth capacitor C4, a 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 a first end of the third capacitor C3, and a control end of the sixth thyristor S6 is connected to a control end of the fifth thyristor S5 and the first detection module 6.

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

[0060] Further, 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, a first end of the fourth thyristor S4 is connected to a second end of the third capacitor C3, one end of the third thyristor S3 is connected to a first end of the third capacitor C3, a second end of the fourth thyristor S4 is connected to a first end of the second LED group and a second end of the first LED group through the fifth capacitor C5, the other end of the third thyristor S3 is connected to a second end of the second LED group, and a control end of the fourth thyristor S4 is connected to a control end of the third thyristor S3 and the first detection module 6.

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

[0063] In another embodiment, please refer to 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 terminal 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 terminal of the first controller U1, and the first end of the third resistor R3 through the second resistor R2. The second end of the third resistor R3 is connected to the IO10 terminal 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 above-mentioned first resistor R1 and second resistor R2 perform voltage sampling on the first LED group, and the third resistor R3 and fourth resistor R4 perform voltage sampling on the second LED group.

[0066] Further, 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 terminal of the first comparator A1 is connected to the second end of the third resistor R3. The output terminal of the first comparator A1 is connected to the IO4 terminal of the first controller U1, the control terminal of the fourth thyristor S4, and the second detection module 7.

[0068] In a specific embodiment, the above-mentioned fifth resistor R5 and fourth diode D4 perform step-down processing on the input signal; the above-mentioned first comparator A1 can select the LM358 comparator.

[0069] Further, 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 terminal of the second comparator A2 is connected to the second end of the first resistor R1. The output terminal of the second comparator A2 is connected to the IO5 terminal of the first controller U1, the control terminal of the sixth thyristor S6, and the second detection module 7.

[0071] In a specific embodiment, the above-mentioned sixth diode and fifth diode D5 perform step-down processing on the input signal; the above-mentioned second comparator A2 can select the LM358 comparator.

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

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

[0074] In a specific embodiment, the above-mentioned first logic chip can be selected as a NOR gate chip; the above-mentioned first inverter INV1 can be selected as a NOT gate chip.

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

[0076] Specifically, the non-inverting input 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 input terminal of the first operational amplifier OP1 is connected to the source electrode of the third power transistor Q3 and grounded through the ninth resistor R9. The output terminal of the first operational amplifier OP1 is connected to the gate electrode of the third power transistor Q3 through the eighth resistor R8. The drain electrode of the third power transistor Q3 is connected to the second terminal of the second LED group.

[0077] In a specific embodiment, the above-mentioned first operational amplifier OP1 can be selected as an LM2902 operational amplifier; the above-mentioned third power transistor Q3 can be selected as an N-channel field effect transistor.

[0078] In an LED intelligent lighting system according to this embodiment, DC electrical energy is accessed through a power interface. The conduction state of the first power transistor Q1 is driven by the IO1 terminal of the first controller U1. In cooperation with the second inductor L2 and the first transformer B1, isolated high-frequency power regulation is performed and the first electrical energy and the second electrical energy are respectively output. After the first electrical energy is rectified and filtered by the first diode D1 and the first capacitor C1, the third electrical energy is output. After the second electrical energy is rectified and filtered by the second diode D2 and the second capacitor C2, the conduction state of the second power transistor Q2 is driven by the IO2 terminal of the first controller U1. In cooperation with the third diode D3, the third capacitor C3 and the first inductor L1, power regulation is performed. Initially, the first inverter INV1 triggers the first thyristor S1 to conduct, and the third electrical energy is transmitted to the first LED group and the second LED group in series. The IO8 terminal of the first controller U1 provides a pulse signal to the first operational amplifier OP1, so that the first operational amplifier OP1, in cooperation with the eighth resistor R8, the seventh resistor R7 and the ninth resistor R9, drives the conduction state of the third power transistor Q3, and then constant current regulation is performed on the first LED group and the second LED group in series. 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 series voltage sampling and output a third signal. When the first signal is stepped down by the fifth resistor R5 and the fourth diode D4 and 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 conduct, 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 transistor Q2 according to the second signal, adjusts the electrical energy provided by the auxiliary conversion module 2, and provides compensation electrical energy for the second LED group through the third capacitor C3 and the fifth capacitor C5, so that the voltages of the first LED group and the second LED group are balanced. Similarly, when the second signal is stepped down by the sixth resistor R6 and the fifth diode D5 and is greater than the first signal, the second comparator A2 outputs a second detection signal, controls the sixth thyristor S6 and the fifth thyristor S5 to conduct, and the first controller U1 controls the conduction state of the second power transistor Q2 according to the first signal, and the auxiliary conversion module 2 performs voltage compensation on the first LED group, so that the voltages of the first LED group and the second LED group are balanced. When both the first comparator A1 and the second comparator A2 are at a low level, it indicates that the voltages of the first LED group and the second LED group are similar. The first logic chip outputs a first control signal to control the second thyristor S2 and the seventh thyristor S7 to conduct, and the first thyristor S1 is cut off, which is received by the IO6 terminal of the first controller U1. At this time, the first controller U1 will adjust the conduction state of the second power transistor Q2 according to the third signal, and then control the electrical energy output by the auxiliary conversion module 2 to perform voltage compensation processing on the third electrical energy.Improve the power supply efficiency for the first LED group and the second LED group in series connection.

[0079] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0080] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments 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, used for isolating and power-adjusting the connected DC power and outputting the first power and the second power, rectifying and filtering the first power, and outputting the 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, for rectifying, filtering and power regulating the second electric energy and performing voltage compensation on the third electric energy, performing voltage compensation on the second LED module when receiving the first detection signal output by the first detection module, and performing voltage compensation on the first LED module when receiving the 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 separately 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 a series state 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, and 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; A microcontroller module is connected to the power conversion module, the voltage detection module, the constant current regulation module, the first detection module, and the second detection module, and is used 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 source 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 and perform lighting work; The constant current regulation module is connected to the second LED module and is used for current sampling and constant current regulation of 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, 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.

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 is connected to 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 also 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 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.

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 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.

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