A silicon controlled LED dimming control circuit

Abstract

The application discloses a thyristor LED dimming control circuit, and relates to the technical field of thyristor LED, which comprises a micro-control module, wherein when a first LED module and a second LED module are connected in series or the first LED module is used for lighting alone, a first power module is used for providing constant-current voltage stabilization; when the first LED module, the second LED module and a third LED module are connected in series for lighting, a second mode module is used for controlling the first power module to perform voltage boosting superposition processing; when the first LED module and the third LED module are connected in parallel for power supply, a first analog switch is used for controlling a second power module and the first power module to perform electric energy compensation and current boosting processing, and the second mode module can be used for controlling the second power module to perform dimming control on the LED module. The thyristor LED dimming control circuit can meet the required driving electric energy of the LED module in different connection states, improve lighting efficiency and improve dimming precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of silicon controlled LED, and particularly relates to a silicon controlled LED dimming control circuit. BACKGROUND

[0002] At present, in indoor lighting light sources, LED has become the main lighting light source, and constant current and voltage driving control and intelligent dimming control of the LED can be improved. In the prior art, the silicon controlled LED generally adopts a silicon controlled LED dimming control circuit composed of a related constant current and voltage driving device, a silicon controlled rectifier, a field effect transistor and the like, and stable driving power is provided. The silicon controlled LED cannot automatically select matched driving power according to the connection state of the silicon controlled LED, so that the silicon controlled LED cannot provide the most suitable driving signal when the connection mode is changed, that is, a plurality of silicon controlled LEDs are connected in series or parallel for lighting, and the driving efficiency of the silicon controlled LED is reduced, and therefore needs to be improved. SUMMARY

[0003] The present application provides a silicon controlled LED dimming control circuit to solve the problems in the background art.

[0004] According to the present application, a silicon controlled LED dimming control circuit is provided, which comprises a power supply module for connecting direct current power.

[0005] A first power module is connected with the power supply module, and is used for power adjustment and boosting of the direct current power and output of first power, and self superposition of the processed power and output of second power.

[0006] A second power module is connected with the power supply module, and is used for boosting of the direct current power and output of third power, and step-down of the direct current power and output of fourth power.

[0007] A first mode module is connected with the second power module, the first power module, a first LED module, a second LED module and a third LED module, and is used for transmission of the third power to the first power module and power compensation and current boosting of the first power, and transmission of the fourth power to the first LED module, the second LED module and the third LED module and adjustment of the illumination brightness of the first LED module, the second LED module and the third LED module.

[0008] A second mode module is connected with the first power module, and is used for self superposition of the first power module when the connection state of the first LED module, the second LED module and the third LED module is not changed by the micro control module.

[0009] The first LED module is connected with the first power module, and is used for illumination work.

[0010] The second LED module is connected with the first LED module and is used for series lighting work with the first LED module.

[0011] The third LED module is connected with the first LED module and the second LED module and is used for series lighting work of the first LED module and the second LED module and parallel lighting work of the first LED module;

[0012] The micro control module is connected with the first mode module, the second mode module, the first power tube module, the second power tube module, the first LED module, the second LED module and the third LED module and is used for controlling the first power module to perform power adjustment work when the first LED module performs single lighting or the first LED module and the second LED module perform series lighting, controlling the first power module to perform boost adjustment when the connection state of the first LED module, the second LED module and the third LED module is not changed, controlling the first mode module to perform electric energy compensation and current boost processing when the first LED module and the third LED module perform parallel lighting, and controlling the first mode module to transmit the fourth electric energy and stopping the electric energy compensation and current boost work of the first mode module when it is necessary to adjust the lighting brightness of the first LED module, the second LED module or the third LED module.

[0013] As a further scheme of the present application, the power supply module comprises a power supply interface; the first power module comprises a first inductor, a first transformer, a first thyristor, a second inductor, a first power tube, a first diode, a first capacitor, a second diode, a second capacitor, a seventh thyristor, a third diode and a third capacitor; and the micro control module comprises a first controller.

[0014] Preferably, the first end of the power supply interface is connected with the first end of the primary side of the first transformer and is connected with one end of the second inductor and one end of the first thyristor through the first inductor, the other end of the first thyristor is connected with the second end of the primary side of the first transformer, the other end of the second inductor is connected with the drain of the first power tube and the anode of the first diode, the cathode of the first diode is connected with one end of the first capacitor, the anode of the second diode and the first end of the secondary side of the first transformer, the second end of the secondary side of the first transformer is connected with the cathode of the second diode and the anode of the third diode through the second capacitor, the cathode of the third diode is connected with the other end of the first capacitor, the first end of the seventh thyristor, the source of the first power tube, the second end of the power supply interface and the ground end through the third capacitor, the gate of the first power tube is connected with the IO1 end of the first controller, the control end of the first thyristor is connected with the second mode module, and the control end of the seventh thyristor is connected with the IO4 end of the first controller.

[0015] As a further scheme of the present application, the second power module comprises a third inductor, a fourth capacitor, a fourth inductor, a second power tube, a fifth capacitor and a third power tube.

[0016] Preferably, one end of the fourth capacitor is connected to the drain of the second power tube and the first end of the power interface through the third inductor, the source of the second power tube is connected to the drain of the third power tube, one end of the fifth capacitor and the first mode module, the source of the third power tube is connected to the other end of the fourth capacitor and the other end of the fifth capacitor and the second end of the power interface through the fourth inductor, the gate of the second power tube and the gate of the third power tube are connected to the IO2 end and the IO3 end of the first controller respectively.

[0017] As a further scheme of the present application: the first LED module comprises a first LED group and a second thyristor;

[0018] Preferably, the first end of the first LED group is connected to the cathode of the third diode, the second end of the first LED group is connected to the anode of the second thyristor, the cathode of the second thyristor is connected to the first mode module, and the control end of the second thyristor is connected to the IO5 end of the first controller and the cathode of the third diode.

[0019] As a further scheme of the present application: the second LED module comprises a second LED group, a fourth diode and a third thyristor; the third LED module comprises a fourth thyristor, a third LED group and a fifth diode;

[0020] Preferably, the first end of the second LED group is connected to the second end of the first LED group, the second end of the second LED group is connected to the anode of the fourth diode, the cathode of the fourth diode is connected to the cathode of the fourth thyristor, one end of the third thyristor and the first end of the third LED group, the second end of the third LED group is connected to the anode of the fifth diode, the cathode of the fifth diode is connected to the cathode of the second thyristor, the second end of the seventh thyristor and the other end of the third thyristor, the anode of the fourth thyristor is connected to the cathode of the third diode, and the control end of the fourth thyristor and the control end of the third thyristor are connected to the IO7 end and the IO6 end of the first controller respectively.

[0021] As a further scheme of the present application: the first mode module comprises a fifth thyristor, a sixth thyristor, a sixth diode and a sixth capacitor;

[0022] Preferably, one end of the fifth thyristor is connected to one end of the sixth thyristor and the drain of the third power tube, the other end of the fifth thyristor is connected to the anode of the sixth diode and grounded through the sixth capacitor, the other end of the sixth thyristor is connected to the cathode of the fifth diode, the cathode of the sixth diode is connected to the anode of the third diode, and the control end of the fifth thyristor and the control end of the sixth thyristor are connected to the IO7 end and the IO8 end of the first controller respectively.

[0023] As a further scheme of the present application: the second mode module comprises a first logic chip, a second logic chip and a first inverter;

[0024] Preferably, the A end and the B end of the first logic chip are connected to the IO5 end and the IO6 end of the first controller respectively, the input end of the first inverter is connected to the IO7 end of the first controller, the A end and the B end of the second logic chip are connected to the Y end of the first logic chip and the output end of the first inverter respectively, and the Y end of the second logic chip is connected to the control end of the first thyristor.

[0025] Compared with the prior art, the beneficial effects of the present application are that the thyristor LED dimming control circuit can control the connection state of the first LED module, the second LED module and the third LED module by the micro control module, realize parallel lighting or series lighting work, provide constant current and voltage by the first power module when the first LED module and the second LED module are in series or the first LED module is used for lighting alone, control the first power module by the second mode module to perform boost superposition processing when the first LED module, the second LED module and the third LED module are used for series lighting, control the second power module and the first power module to perform electric energy compensation and boost processing by the first analog switch when the first LED module and the third LED module are used for parallel power supply, so as to meet the driving electric energy required by the LED module in different connection states, improve the lighting efficiency, and control the first LED module, the second LED module and the third LED module by the second power module to improve the dimming precision. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 A principle block diagram of a thyristor LED dimming control circuit provided by the embodiments of the present application.

[0028] Figure 2 A circuit diagram of a thyristor LED dimming control circuit provided by the embodiments of the present application.

[0029] Figure 3 A circuit diagram of the first mode module provided by the embodiments of the present application.

[0030] Figure 4 A circuit diagram of the second mode module provided by the embodiments of the present application. DETAILED DESCRIPTION

[0031] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0032] In one embodiment, referring to Figure 1 A silicon-controlled LED dimming control circuit, comprising: a power module 1 for connecting DC power;

[0033] A first power module 2 connected with the power module 1, for power regulation and boosting of the DC power and outputting a first power, and self-stacking of the processed power and outputting a second power;

[0034] A second power module 3 connected with the power module 1, for boosting of the DC power and outputting a third power, and for step-down of the DC power and outputting a fourth power;

[0035] A first mode module 4 connected with the second power module 3, the first power module 2, the first LED module 6, the second LED module 7 and the third LED module 8, for transmitting the third power to the first power module 2 and performing power compensation and current boosting of the first power, and for transmitting the fourth power to the first LED module 6, the second LED module 7 and the third LED module 8 and adjusting the illumination brightness of the first LED module 6, the second LED module 7 and the third LED module 8;

[0036] A second mode module 5 connected with the first power module 2, for controlling the first power module 2 to perform self-stacking of the power when the micro-control module 9 does not change the connection state of the first LED module 6, the second LED module 7 and the third LED module 8;

[0037] A first LED module 6 connected with the first power module 2, for performing illumination work;

[0038] A second LED module 7 connected with the first LED module 6, for performing series illumination work with the first LED module 6;

[0039] A third LED module 8 connected with the first LED module 6 and the second LED module 7, for performing series illumination work with the first LED module 6 and the second LED module 7, and performing parallel illumination work with the first LED module 6;

[0040] The micro-control module 9 is connected with the first mode module 4, the second mode module 5, the first power tube Q1 module, the second power tube Q2 module, the first LED module 6, the second LED module 7 and the third LED module 8, and is used for controlling the first power module 2 to perform power adjustment work when the first LED module 6 performs single lighting or the first LED module 6 and the second LED module 7 perform series lighting, controlling the first power module 2 to perform boost adjustment when the connection state of the first LED module 6, the second LED module 7 and the third LED module 8 is not changed, controlling the first mode module 4 to perform power compensation and current boost processing when the first LED module 6 and the third LED module 8 perform parallel lighting, and controlling the first mode module 4 to transmit the fourth power and stopping the power compensation and current boost work of the first mode module 4 when it is necessary to adjust the lighting brightness of the first LED module 6, the second LED module 7 or the third LED module 8.

[0041] In a specific embodiment, the power module 1 can adopt a power circuit composed of a power interface to access direct current power; the first power module 2 can adopt a first power circuit composed of an inductor, a comparator, a field effect tube and a diode to perform power adjustment and power self-stacking boost; the second power module 3 can adopt a second power circuit composed of an inductor, a diode and a field effect tube to perform boost and buck adjustment work, realize power compensation and current boost work of the first power module 2, and realize dimming control of the first LED module 6, the second LED module 7 and the third LED module 8; the first mode module 4 can adopt a first mode circuit composed of a thyristor, a capacitor and a diode to control the power transmission path of the second power module 3, and then control the working state of the second power module 3, the first power module 2, the first LED module 6, the second LED module 7 and the third LED module 8; the second mode module 5 can adopt a second mode circuit composed of a logic chip and an inverter to control the self-stacking work of the first mode module 4 according to the connection state of the first LED module 6, the second LED module 7 and the third LED module 8; the first LED module 6 can adopt a first LED module 6 composed of an LED group and a thyristor to perform lighting control and power transmission control; the second LED module 7 can adopt a second LED circuit composed of a diode, an LED group and a thyristor to perform lighting work and power transmission control; the third LED module 8 can adopt a third LED circuit composed of a diode, an LED group and a thyristor to perform lighting work and power transmission control; and the micro-control module 9 can adopt a micro-control circuit composed of a single-chip microcomputer, which integrates an operator, a controller, a memory and an input-output device and realizes signal processing, data storage, module control, timing control and other functions.

[0042] In another embodiment, please refer to Figure 1 , Figure 2、 Figure 3 and Figure 4 The power supply module 1 comprises a power supply interface; the first power module 2 comprises a first inductor L1, a first transformer B1, a first thyristor S1, a second inductor L2, a first power tube Q1, a first diode D1, a first capacitor C1, a second diode D2, a second capacitor C2, a seventh thyristor S7, a third diode D3 and a third capacitor C3; the micro control module 9 comprises a first controller U1;

[0043] Specifically, the first end of the power supply interface is connected to the first end of the primary side of the first transformer B1 and connected to one end of the second inductor L2 and one end of the first thyristor S1 through the first inductor L1, the other end of the first thyristor S1 is connected to the second end of the primary side of the first transformer B1, the other end of the second inductor L2 is connected to the drain of the first power tube Q1 and the anode of the first diode D1, the cathode of the first diode D1 is connected to one end of the first capacitor C1, the anode of the second diode D2 and the first end of the secondary side of the first transformer B1, the second end of the secondary side of the first transformer B1 is connected to the cathode of the second diode D2 and the anode of the third diode D3 through the second capacitor C2, the cathode of the third diode D3 is connected to the other end of the first capacitor C1, the first end of the seventh thyristor S7, the source of the first power tube Q1, the second end of the power supply interface and the ground end through the third capacitor C3, the gate of the first power tube Q1 is connected to the IO1 end of the first controller U1, the control end of the first thyristor S1 is connected to the second mode module 5, and the control end of the seventh thyristor S7 is connected to the IO4 end of the first controller U1.

[0044] In specific embodiments, the above-mentioned first power tube Q1 can be selected as an N-channel field effect tube, cooperating with the first inductor L1, the second inductor L2, the first diode D1, the second diode D2, the third diode D3 and the third capacitor C3 to perform power regulation processing, the first thyristor S1 can be selected as a bidirectional thyristor, cooperating with the first transformer B1 and the second capacitor C2 to perform self-stacking boost processing; the above-mentioned first inductor L1 and the second inductor L2 are respectively the excitation inductance and the leakage inductance of the first transformer B1; the above-mentioned first controller U1 can be selected as an STM32 single-chip microcomputer; the above-mentioned seventh thyristor S7 can be selected as a bidirectional thyristor.

[0045] Further, the second power module 3 comprises a third inductor L3, a fourth capacitor C4, a fourth inductor L4, a second power tube Q2, a fifth capacitor C5 and a third power tube Q3;

[0046] Specifically, one end of the fourth capacitor C4 is connected to the drain of the second power tube Q2 and the first end of the power interface through the third inductor L3, the source of the second power tube Q2 is connected to the drain of the third power tube Q3, one end of the fifth capacitor C5 and the first mode module 4, the source of the third power tube Q3 is connected to the other end of the fourth capacitor C4 and the other end of the fifth capacitor C5 and the second end of the power interface through the fourth inductor L4, the gate of the second power tube Q2 and the gate of the third power tube Q3 are connected to the IO2 terminal and the IO3 terminal of the first controller U1 respectively.

[0047] In specific embodiments, the second power tube Q2 and the third power tube Q3 can be N-channel field effect tubes.

[0048] Further, the first LED module 6 includes a first LED group and a second thyristor S2;

[0049] Specifically, the first end of the first LED group is connected to the cathode of the third diode D3, the second end of the first LED group is connected to the anode of the second thyristor S2, the cathode of the second thyristor S2 is connected to the first mode module 4, and the control end of the second thyristor S2 is connected to the IO5 terminal of the first controller U1 and the cathode of the third diode D3.

[0050] In specific embodiments, the second thyristor S2 can be a unidirectional thyristor.

[0051] Further, the second LED module 7 includes a second LED group, a fourth diode D4 and a third thyristor S3; the third LED module 8 includes a fourth thyristor S4, a third LED group and a fifth diode D5;

[0052] Specifically, the first end of the second LED group is connected to the second end of the first LED group, the second end of the second LED group is connected to the anode of the fourth diode D4, the cathode of the fourth diode D4 is connected to the cathode of the fourth thyristor S4, one end of the third thyristor S3 and the first end of the third LED group, the second end of the third LED group is connected to the anode of the fifth diode D5, the cathode of the fifth diode D5 is connected to the cathode of the second thyristor S2, the second end of the seventh thyristor S7 and the other end of the third thyristor S3, the anode of the fourth thyristor S4 is connected to the cathode of the third diode D3, and the control end of the fourth thyristor S4 and the control end of the third thyristor S3 are connected to the IO7 terminal and the IO6 terminal of the first controller U1 respectively.

[0053] In specific embodiments, the third thyristor S3 can be a bidirectional thyristor, and the fourth thyristor S4 can be a unidirectional thyristor.

[0054] Further, the first mode module 4 includes a fifth thyristor S5, a sixth thyristor S6, a sixth diode D6 and a sixth capacitor C6;

[0055] Specifically, one end of the fifth thyristor S5 is connected with one end of the sixth thyristor S6 and the drain of the third power tube Q3, the other end of the fifth thyristor S5 is connected with the anode of the sixth diode D6 and grounded through the sixth capacitor C6, the other end of the sixth thyristor S6 is connected with the cathode of the fifth diode D5, the cathode of the sixth diode D6 is connected with the anode of the third diode D3, the control end of the fifth thyristor S5 and the control end of the sixth thyristor S6 are respectively connected with the IO7 end and the IO8 end of the first controller U1.

[0056] In specific embodiments, the fifth thyristor S5 and the sixth thyristor S6 can be bidirectional thyristors.

[0057] Further, the second mode module 5 comprises a first logic chip J1, a second logic chip J2 and a first inverter J3.

[0058] Specifically, the A end and the B end of the first logic chip J1 are respectively connected with the IO5 end and the IO6 end of the first controller U1, the input end of the first inverter J3 is connected with the IO7 end of the first controller U1, the A end and the B end of the second logic chip J2 are respectively connected with the Y end of the first logic chip J1 and the output end of the first inverter J3, and the Y end of the second logic chip J2 is connected with the control end of the first thyristor S1.

[0059] In specific embodiments, the first logic chip J1 can be an NAND gate chip, the second logic chip J2 can be an AND gate chip, and the first inverter J3 can be a NOT gate chip.

[0060] The embodiment of the silicon controlled rectifier LED dimming control circuit, by power interface access DC power, when no need for dimming control and parallel lighting control, the IO4 end of the first controller U1 controls the seventh silicon controlled rectifier S7 to conduct, only the first LED group needs to work, the IO5 end of the first controller U1 controls the second silicon controlled rectifier S2 to conduct, the first LED group and the second LED group work in series, the IO6 end of the first controller U1 controls the third silicon controlled rectifier S3 to conduct, the IO1 end of the first controller U1 controls the first power tube Q1 to conduct, cooperates with the first inductor L1, the second inductor L2, the first diode D1, the first capacitor C1, the second diode D2, the third diode D3 and the third capacitor C3 to carry out power regulation processing, to meet the drive control of the first LED group and the second LED group, when the first LED group, the second LED group and the third LED group need to be controlled to work in series, the first logic chip J1 and the first inverter J3 provide high level for the second logic chip J2, so that the second logic chip J2 triggers the first silicon controlled rectifier S1 to conduct, the IO1 end of the first controller U1 controls the first power tube Q1 to conduct, and then cooperates with the first inductor L1, the second inductor L2, the first diode D1, the first capacitor C1, the second capacitor C2, the third diode D3 and the third capacitor C3 to carry out self superposition voltage boosting processing, so as to meet the drive power of the LED group in series, when the first LED group and the third LED group need to be supplied in parallel, the IO7 end of the first controller U1 controls the fourth silicon controlled rectifier S4 and the fifth silicon controlled rectifier S5 to conduct, and the IO2 end and the IO3 end of the first controller U1 control the conduction state of the second power tube Q2 and the third power tube Q3, cooperates with the third inductor L3, the fourth inductor L4 and the fifth capacitor C5 to carry out voltage boosting processing, and carries out power compensation and current boosting processing with the power output by the first power module 2, when the first LED module 6, the second LED module 7 and the third LED module 8 need to be dimmed, the first controller U1 stops controlling the seventh silicon controlled rectifier S7 or the fifth silicon controlled rectifier S5 to conduct, the IO8 end of the first controller U1 controls the sixth silicon controlled rectifier S6 to conduct, and the first controller U1 controls the conduction state of the second power tube Q2 and the third power tube Q3, realizes step-down power supply, and then adjusts the output potential of the first LED module 6, the second LED module 7 and the third LED module 8, and then carries out dimming control.

[0061] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0062] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A silicon controlled rectifier (SCR) LED dimming control circuit, characterized in that, The thyristor LED dimming control circuit includes: The power module is used to connect to DC power. The first power module is connected to the power supply module and is used to perform power regulation and boosting of DC power and output the first power, and to perform self-superposition processing on the processed power and output the second power. The second power module, connected to the power supply module, is used to boost DC power and output the third power, and to step down DC power and output the fourth power. The first mode module is connected to the second power module, the first power module, the first LED module, the second LED module, and the third LED module. It is used to transmit the third electrical energy to the first power module and perform power compensation and current boosting on the first electrical energy. It also transmits the fourth electrical energy to the first LED module, the second LED module, and the third LED module and adjusts the lighting brightness of the first LED module, the second LED module, and the third LED module. The second mode module is connected to the first power module and is used to control the first power module to perform self-addition of electrical energy when the microcontroller module does not change the connection state of the first LED module, the second LED module and the third LED module. The first LED module is connected to the first power module and is used for lighting. The second LED module is connected to the first LED module and is used to perform series lighting with the first LED module. The third LED module is connected to the first LED module and the second LED module, and is used to perform series lighting operation with the first LED module and the second LED module, and to perform parallel lighting operation with the first LED module; The microcontroller module is connected to the first mode module, the second mode module, the first power module, the second power module, the first LED module, the second LED module, and the third LED module. It is used to control the first LED module to perform individual lighting or to control the first LED module and the second LED module to perform series lighting. When the connection state of the first LED module, the second LED module, and the third LED module is not changed, the first power module is controlled to perform boost regulation. When the first LED module and the third LED module are controlled to perform parallel lighting, the first mode module is controlled to perform power compensation and current boosting. When it is necessary to adjust the lighting brightness of the first LED module, the second LED module, or the third LED module, the first mode module is controlled to transmit fourth power and stop the power compensation and current boosting of the first mode module. The first LED module includes a first LED group and a second thyristor; the first power module includes a first inductor, a first transformer, a first thyristor, a second inductor, a first power transistor, a first diode, a first capacitor, a second diode, a second capacitor, a seventh thyristor, a third diode, and a third capacitor; the microcontroller module includes a first controller; The second power module includes a third inductor, a fourth capacitor, a second power transistor, a fifth capacitor, and a third power transistor; The first end of the first LED group is connected to the cathode of the third diode, the second end of the first LED group is connected to the anode of the second thyristor, the cathode of the second thyristor is connected to the first mode module, and the control terminal of the second thyristor is connected to the IO5 terminal of the first controller and the cathode of the third diode. The second LED module includes a second LED group, a fourth diode, and a third thyristor; the third LED module includes a fourth thyristor, a third LED group, and a fifth diode. The first end of the second LED group is connected to the second end of the first LED group. The second end of the second LED group is connected to the anode of the fourth diode. The cathode of the fourth diode is connected to the cathode of the fourth thyristor, one end of the third thyristor, and the first end of the third LED group. The second end of the third LED group is connected to the anode of the fifth diode. The cathode of the fifth diode is connected to the cathode of the second thyristor, the second end of the seventh thyristor, and the other end of the third thyristor. The anode of the fourth thyristor is connected to the cathode of the third diode. The control terminals of the fourth thyristor and the third thyristor are respectively connected to the IO7 and IO6 terminals of the first controller. The first mode module includes a fifth thyristor, a sixth thyristor, a sixth diode, and a sixth capacitor; One end of the fifth thyristor is connected to one end of the sixth thyristor and the drain of the third power transistor. The other end of the fifth thyristor is connected to the anode of the sixth diode and grounded through the sixth capacitor. The other end of the sixth thyristor is connected to the cathode of the fifth diode. The cathode of the sixth diode is connected to the anode of the third diode. The control terminals of the fifth thyristor and the sixth thyristor are respectively connected to the IO7 and IO8 terminals of the first controller. The second mode module includes a first logic chip, a second logic chip, and a first inverter; The A and B terminals of the first logic chip are connected to the IO5 and IO6 terminals of the first controller, respectively. The input terminal of the first inverter is connected to the IO7 terminal of the first controller. The A and B terminals of the second logic chip are connected to the Y terminal of the first logic chip and the output terminal of the first inverter, respectively. The Y terminal of the second logic chip is connected to the control terminal of the first thyristor.

2. The thyristor LED dimming control circuit according to claim 1, characterized in that, The power module includes a power interface; 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 one end of the second inductor and one end of the first thyristor through the first inductor. The other end of the first thyristor is connected to the second end of the primary side of the first transformer. The other end of the second inductor is connected to the drain of the first power transistor and the anode of the first diode. The cathode of the first diode is connected to one end of the first capacitor, the anode of the second diode, and the first end of the secondary side of the first transformer. The second end of the secondary side of the first transformer is connected to the cathode of the second diode and the anode of the third diode through the second capacitor. The cathode of the third diode is connected to the other end of the first capacitor, the first end of the seventh thyristor, the source of the first power transistor, the second end of the power interface, and the ground terminal through the third capacitor. The gate of the first power transistor is connected to the IO1 terminal of the first controller. The control terminal of the first thyristor is connected to the second mode module. The control terminal of the seventh thyristor is connected to the IO4 terminal of the first controller.

3. The thyristor LED dimming control circuit according to claim 2, characterized in that, One end of the fourth capacitor is connected to the drain of the second power transistor and then to the first end of the power interface through the third inductor. The source of the second power transistor is connected to the drain of the third power transistor, one end of the fifth capacitor, and the first mode module. The source of the third power transistor is connected to the other end of the fourth capacitor and then to the other end of the fifth capacitor and the second end of the power interface through the fourth inductor. The gates of the second power transistor and the third power transistor are respectively connected to the IO2 and IO3 terminals of the first controller.

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