Driving circuit and LED lighting system

Abstract

The utility model discloses a drive circuit and an LED lighting system, relates to the lighting technical field, the drive circuit comprises a power supply circuit, a detection circuit, a control circuit and a switch circuit, the power supply circuit is used for being electrically connected with an LED, the detection circuit is electrically connected with the power supply circuit, the control circuit is electrically connected with the detection circuit, and the switch circuit is electrically connected with the control circuit. The switch circuit is electrically connected with the power supply circuit and the control circuit, and the switch circuit is used for being electrically connected with an LED. The detection circuit detects the output voltage of each driving power supply, generates a corresponding detection signal and outputs the detection signal to the control circuit, so that the control circuit generates a corresponding control signal and outputs the control signal to the switching circuit, and the switching circuit conducts a power supply path of part of the driving power supplies to the LED. Therefore, when a certain driving power supply fails, the driving circuit can be automatically switched to other driving power supplies which work normally, so that the service life of the LED can be effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting, and in particular to a driving circuit and an LED lighting system. Background Art

[0002] In modern lighting technology, LED (light emitting diode) has become a widely used light source, and is favored by people for its advantages such as high efficiency, energy saving, long life and environmental protection.

[0003] The driving power supply is the energy source for LED lighting, and is responsible for converting AC power into DC power suitable for LED operation. However, most LEDs in the prior art use a single driving power supply. Once the driving power supply fails, the LED cannot work normally, resulting in a short service life of the LED. Utility Model Content

[0004] The main purpose of the utility model is to provide a driving circuit and an LED lighting system, aiming to increase the service life of LEDs.

[0005] To achieve the above-mentioned purpose, the driving circuit proposed by the utility model is applied to LED, comprising:

[0006] A power supply circuit, the power supply circuit comprising a plurality of driving power supplies; the power supply circuit is used to be electrically connected to the LED to supply power to the LED;

[0007] A detection circuit, the detection circuit is electrically connected to the power supply circuit; the detection circuit is used to detect the output voltages of the plurality of driving power supplies respectively and generate corresponding detection signals;

[0008] A control circuit, the control circuit being electrically connected to the detection circuit; the control circuit being used to generate a corresponding control signal according to the detection signal;

[0009] A switch circuit, wherein the switch circuit is electrically connected to the power supply circuit and the control circuit respectively; the switch circuit is used to be electrically connected to the LED, and the switch circuit is also used to conduct the power supply path of some of the multiple drive power supplies to the LED according to the control signal.

[0010] In one embodiment, the detection circuit includes a plurality of voltage-dividing circuits, each of the plurality of voltage-dividing circuits is connected to each of the plurality of driving power supplies in a one-to-one correspondence, and each of the plurality of voltage-dividing circuits is electrically connected to the control circuit.

[0011] In one embodiment, the switching circuit includes a plurality of electronic switches, the control circuit has a plurality of switch control signal output terminals, the controlled terminals of the plurality of electronic switches are connected one-to-one with the plurality of switch control signal output terminals, the input terminals of the plurality of electronic switches are respectively connected with the power supply output terminals of the plurality of driving power supplies, and the output terminals of the electronic switches are used to connect the LEDs.

[0012] In one embodiment, the driving power supply circuit includes a first driving power supply and a second driving power supply, and the switching circuit includes a first electronic switch and a second electronic switch; the control circuit is used to output a control signal to the first electronic switch and the second electronic switch when it is detected that the output voltages of the first driving power supply and the second driving power supply both meet the power supply requirements corresponding to the LED, so as to cut off the power supply path of the second driving power supply to the LED and turn on the power supply path of the first driving power supply to the LED; the control circuit is also used to output a control signal to the first electronic switch and the second electronic switch when it is detected that the output voltage of the first driving power supply does not meet the power supply requirements corresponding to the LED, so as to cut off the power supply path of the first driving power supply to the LED and turn on the power supply path of the second driving power supply to the LED.

[0013] In one embodiment, the driving circuit further includes an alarm circuit, which is electrically connected to the control circuit; the alarm circuit is used to sound an alarm when the output voltages of the first driving power supply and the second driving power supply do not meet the power supply requirements corresponding to the LED.

[0014] In one embodiment, the driving circuit further includes an overcurrent protection circuit electrically connected to the LED and the power supply circuit; the overcurrent protection circuit is used to disconnect the electrical connection between the LED and the power supply circuit when the current of the LED exceeds a preset value.

[0015] In one embodiment, the driving circuit further includes a voltage stabilizing circuit, which is electrically connected to the power supply circuit; the voltage stabilizing circuit is used to stabilize the output voltage of the driving power supply.

[0016] In one embodiment, the driving circuit further includes a rectifier circuit, which is electrically connected to the power supply circuit; the rectifier circuit is used to convert the alternating current of the driving power supply into direct current for use by the LED.

[0017] In one embodiment, the driving circuit further includes a filter circuit, which is electrically connected to the power supply circuit; the filter circuit is used to filter out noise and interference signals in the output of the driving power supply.

[0018] The utility model also provides an LED lighting system, comprising the driving circuit and an LED connected to the driving circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of an embodiment of a driving circuit provided by the utility model;

[0021] Figure 2 A schematic diagram of the structure of another embodiment of the driving circuit provided by the utility model;

[0022] Figure 3 A schematic structural diagram of another embodiment of the drive circuit provided by the utility model;

[0023] Figure 4 A schematic structural diagram of another embodiment of the driving circuit provided by the utility model;

[0024] Figure 5 A schematic diagram of the structure of another embodiment of the driving circuit provided by the utility model;

[0025] Figure 6 A schematic diagram of the structure of another embodiment of the driving circuit provided by the utility model;

[0026] Figure 7 A schematic structural diagram of another embodiment of the drive circuit provided by the utility model;

[0027] Figure 8 A schematic structural diagram of another embodiment of the driving circuit provided by the utility model;

[0028] Fig. 9 This is a schematic structural diagram of another embodiment of the drive circuit provided by the utility model.

[0029] Description of Figure Numbers:

[0030] 10. Power supply circuit; L1~LN, first driving power supply~Nth driving power supply; 20. Detection circuit; 21~2N, first voltage divider circuit~Nth voltage divider circuit; 30. Control circuit; 40. Switch circuit; K1~KN, first electronic switch~Nth electronic switch; 60. Alarm circuit; 70. Overcurrent protection circuit; 80. Voltage stabilizing circuit; 90. Rectification circuit; 100. Filter circuit.

[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0035] In modern lighting technology, LED (light emitting diode) has become a widely used light source, and is favored by people for its advantages such as high efficiency, energy saving, long life and environmental protection.

[0036] The driving power supply is the energy source for LED lighting, and is responsible for converting AC power into DC power suitable for LED operation. However, most LEDs in the prior art use a single driving power supply. Once the driving power supply fails, the LED cannot work normally, resulting in a short service life of the LED.

[0037] In order to solve the above problems, the utility model proposes a driving circuit, please refer to Figure 1In one embodiment of the utility model, the driving circuit includes a power circuit 10, a detection circuit 20, a control circuit 30 and a switch circuit 40. The power circuit 10 is used to be electrically connected to the LED, the detection circuit 20 is electrically connected to the power circuit 10, the control circuit 30 is electrically connected to the detection circuit 20, the switch circuit 40 is electrically connected to the power circuit 10 and the control circuit 30 respectively, and the switch circuit 40 is used to be electrically connected to the LED. Among them, the power circuit 10 includes a plurality of driving power supplies, the detection circuit 20 is used to detect the output voltages of the plurality of driving power supplies respectively, generate corresponding detection signals and output them to the control circuit 30, the control circuit 30 is used to generate corresponding control signals according to the detection signals, and output them to the switch circuit 40, and the switch circuit 40 is used to conduct the power supply path of some of the plurality of driving power supplies to the LED according to the control signals.

[0038] In the present embodiment, the driving power supply is an AC-DC conversion power supply, which can convert the input alternating current into direct current for use by the LED. In the present embodiment, the driving power supplies can be two, three or more, and the specific number can be determined according to actual needs and the power requirements of the LED, and is not limited here. In the present embodiment, the multiple driving power supplies are specifically the first driving power supply L1 to the Nth driving power supply LN, where N is an integer and N is greater than 1. In the present embodiment, the multiple driving power supplies are connected in parallel, so that they can jointly provide energy for the LED. When one or more of the driving power supplies fail, other normal driving power supplies can still continue to provide energy for the LED, thereby ensuring the normal operation of the LED and extending the service life of the LED.

[0039] In a feasible embodiment of the present utility model, please refer to Figure 2 , the detection circuit 20 includes a plurality of voltage-dividing circuits, specifically a first voltage-dividing circuit 21 to an Nth voltage-dividing circuit 2N, where N is an integer and N is greater than 1. The plurality of voltage-dividing circuits are respectively connected to the plurality of driving power supplies in a one-to-one correspondence, and the plurality of voltage-dividing circuits are respectively electrically connected to the control circuit 30. In this embodiment, the voltage-dividing circuit includes a voltage-dividing resistor, which is used to divide the output voltage of the driving power supply into a voltage range suitable for processing by the control circuit 30. The voltage-dividing circuit divides the output voltage of the driving power supply to obtain a voltage-dividing value of the voltage range, and outputs the voltage-dividing value as a detection signal to the control circuit 30.

[0040] In this embodiment, the control circuit 30 can be a circuit formed by overlapping discrete components, or an integrated circuit (chip). As long as the control circuit 30 can generate a corresponding control signal according to the received detection signal, the circuit and chip used to control the on-off state of the switch circuit 40 are within the protection scope of the present utility model. In this embodiment, the control circuit 30 determines the working state of multiple driving power supplies according to the received detection signal, such as whether the output voltage is within the normal range, whether there is an abnormal situation such as overvoltage or undervoltage, and then generates a corresponding control signal to the switch circuit 40.

[0041] In a feasible embodiment of the present utility model, please refer to Figure 3 The switch circuit 40 includes a plurality of electronic switches, specifically a first electronic switch K1 to an Nth electronic switch KN, wherein N is an integer and N is greater than 1. The control circuit 30 has a plurality of switch control signal output terminals, the controlled terminals of the plurality of electronic switches are connected to the plurality of switch control signal output terminals in a one-to-one correspondence, the input terminals of the plurality of electronic switches are connected to the power supply output terminals of the plurality of driving power supplies respectively, and the output terminals of the electronic switches are used to connect the LEDs.

[0042] In this embodiment, the electronic switch can be a transistor (such as a triode, a field effect transistor, etc.) or a switch tube (such as a MOSFET, an IGBT, etc.), which realizes the on-off control between the driving power supply and the LED by receiving the control signal. When the control signal is at a high level, the switch circuit 40 is turned on, and the driving power supply supplies power to the LED; when the control signal is at a low level, the switch circuit 40 is turned off, and the driving power supply stops supplying power to the LED. In this way, the power supply control of the LED can be effectively realized, the normal operation of the LED can be ensured, and the reliability and stability of the entire driving circuit can be improved.

[0043] In this embodiment, when the driving circuit is working, the detection circuit 20 will continuously detect the output voltage of each driving power supply. When the output voltage of a driving power supply is higher than the preset voltage threshold, it is determined that the driving power supply is normal and meets the power supply demand corresponding to the LED. When the output voltage of a driving power supply is lower than the preset threshold, it means that the driving power supply may have a fault or performance degradation. At this time, it is determined that the driving power supply is abnormal and does not meet the power supply demand corresponding to the LED. When the detection circuit 20 detects that all driving power supplies are normal, the control circuit 30 will generate a corresponding control signal to control the switch circuit 40 to conduct the power supply path of part of the driving power supply to the LED, and correspondingly disconnect the power supply path of another part of the driving power supply to the LED. When the detection circuit 20 detects that a certain conducted power supply is abnormal through the corresponding driving power supply, the control circuit 30 will generate a corresponding control signal to control the switch circuit 40 to disconnect the power supply path of the abnormal driving power supply to the LED, and at the same time conduct the power supply path of other normal driving power supplies to the LED. In this way, when a driving power supply fails, the driving circuit of the utility model can automatically switch to other normally working driving power supplies, thereby effectively improving the service life of the LED. At the same time, the drive circuit of the utility model can automatically switch to other normally working drive power sources, which also improves the fault tolerance and stability of the entire drive circuit and avoids the whole system paralysis caused by a single fault point. In addition, since the number of drive power sources can be determined according to actual needs and the power requirements of the LED, the drive circuit of the utility model also has strong flexibility and scalability, and can adapt to LED lighting applications in different occasions and with different needs.

[0044] In a feasible embodiment of the present utility model, please refer to Figure 4 The driving power supply circuit 10 includes a first driving power supply L1 and a second driving power supply L2, and the switching circuit 40 includes a first electronic switch K1 and a second electronic switch K2; the control circuit 30 is used to output a control signal to the first electronic switch K1 and the second electronic switch K2 when it is detected that the output voltages of the first driving power supply L1 and the second driving power supply L2 both meet the power supply requirements corresponding to the LED, so as to cut off the power supply path of the second driving power supply L2 to the LED and conduct the power supply path of the first driving power supply L1 to the LED; the control circuit 30 is also used to output a control signal to the first electronic switch K1 and the second electronic switch K2 when it is detected that the output voltage of the first driving power supply L1 does not meet the power supply requirements corresponding to the LED, so as to cut off the power supply path of the first driving power supply L1 to the LED and conduct the power supply path of the second driving power supply L2 to the LED.

[0045] In this embodiment, when the first driving power supply L1 and the second driving power supply L2 are both operating normally, the control circuit 30 will output a control signal to turn on the first electronic switch K1 and turn off the second electronic switch K2. At this time, only the first driving power supply L1 supplies power to the LED. When the first driving power supply L1 fails or its performance degrades, and its output voltage is lower than a preset threshold, the detection circuit 20 will detect this abnormality and pass the information to the control circuit 30. After receiving this information, the control circuit 30 will output a control signal to turn off the first electronic switch K1 and turn on the second electronic switch K2. At this time, only the second driving power supply L2 supplies power to the LED. In this way, when a driving power supply fails, the driving circuit can automatically switch to other driving power supplies that are operating normally, thereby ensuring the normal operation of the LED and extending its service life.

[0046] In a feasible embodiment of the present utility model, please refer to Figure 5 The driving circuit also includes an alarm circuit 60, which is electrically connected to the control circuit 30; the alarm circuit 60 is used to sound an alarm when the output voltages of the first driving power supply L1 and the second driving power supply L2 do not meet the power supply requirements corresponding to the LED.

[0047] In this embodiment, the alarm circuit 60 includes alarm devices such as a buzzer and an indicator light. When the control circuit 30 detects that the output voltages of the first driving power supply L1 and the second driving power supply L2 do not meet the power supply requirements of the LED, that is, both driving power supplies fail or their performance degrades, the control circuit 30 will output a control signal to the alarm circuit 60, triggering the buzzer to sound or the indicator light to flash, reminding the user that the driving circuit is abnormal and needs to be repaired or replaced in time. In this way, faults in the driving circuit can be discovered and resolved in time to avoid greater impact on the entire system.

[0048] In a feasible embodiment of the present utility model, please refer to Figure 6 The driving circuit also includes an overcurrent protection circuit 70, which is electrically connected to the LED and the power circuit 10; the overcurrent protection circuit 70 is used to disconnect the electrical connection between the LED and the power circuit 10 when the current of the LED exceeds a preset value.

[0049] In this embodiment, the overcurrent protection circuit 70 includes a current detection module and an overcurrent protection switch. When the current of the LED exceeds a preset value, the current detection module detects the abnormal current and transmits the information to the overcurrent protection switch. After receiving the information, the overcurrent protection switch quickly disconnects the electrical connection between the LED and the power circuit 10, thereby preventing the LED from being damaged by excessive current. In this way, the overcurrent protection circuit 70 can effectively protect the LED from the influence of excessive current, extend its service life, and improve the reliability and stability of the entire drive circuit.

[0050] In this embodiment, the overcurrent protection circuit 70 is also electrically connected to the control circuit 30. When the current detection module detects an abnormal current, this information can also be transmitted to the control circuit 30. After receiving this information, the control circuit 30 can output a corresponding control signal to control the switch circuit 40 to disconnect all the power supply paths of the driving power supply to the LED, and at the same time trigger the alarm circuit 60 to sound an alarm, reminding the user that the LED has an overcurrent phenomenon and needs to be repaired in time.

[0051] In a feasible embodiment of the present utility model, please refer to Figure 7 The driving circuit also includes a voltage stabilizing circuit 80, which is electrically connected to the power supply circuit 10; the voltage stabilizing circuit 80 is used to stabilize the output voltage of the driving power supply.

[0052] In this embodiment, the voltage stabilizing circuit 80 can be one or more voltage stabilizers, which are used to adjust the output voltage of the power supply circuit 10 to keep it within a preset range. Since the fluctuation of the power supply voltage may affect the brightness and color of the LED, the voltage stabilizing circuit 80 can ensure the stable operation of the LED and improve the lighting effect.

[0053] In a feasible embodiment of the present utility model, please refer to Figure 8 The driving circuit also includes a rectifier circuit 90, which is electrically connected to the power supply circuit 10; the rectifier circuit 90 is used to convert the alternating current of the driving power supply into direct current for use by the LED.

[0054] In this embodiment, the rectifier circuit 90 includes components such as a rectifier bridge and a filter capacitor, which are used to convert the AC power of the driving power supply into DC power and filter out the ripple therein to ensure the stable operation of the LED. The setting of the rectifier circuit 90 can effectively improve the lighting effect and service life of the LED, and can also reduce the impact of the power supply circuit 10 on the surrounding environment.

[0055] In a feasible embodiment of the present utility model, please refer to Fig. 9The driving circuit also includes a filter circuit 100, which is electrically connected to the power supply circuit 10; the filter circuit 100 is used to filter out noise and interference signals in the output of the driving power supply.

[0056] In this embodiment, the filter circuit 100 can be an RC filter circuit 100, an RL filter circuit, an RCL filter circuit 100 or other types of filter circuits 100, which are used to filter out high-frequency noise and interference signals in the output of the driving power supply to ensure the lighting effect and service life of the LED.

[0057] The technical solution of the utility model adopts a power supply circuit 10, a detection circuit 20, a control circuit 30 and a switch circuit 40, so that when the driving circuit is working, the detection circuit 20 will continuously detect the output voltage of each driving power supply. When the output voltage of a driving power supply is higher than the preset voltage threshold, it is determined that the driving power supply is normal and meets the power supply demand corresponding to the LED. When the output voltage of a driving power supply is lower than the preset threshold, it indicates that the driving power supply may have a fault or performance degradation. At this time, it is determined that the driving power supply is abnormal and does not meet the power supply demand corresponding to the LED. When the detection circuit 20 detects that all driving power supplies are normal, the control circuit 30 will generate a corresponding control signal to control the switch circuit 40 to conduct the power supply path of part of the driving power supply to the LED, and correspondingly disconnect the power supply path of another part of the driving power supply to the LED. When the detection circuit 20 detects that a certain conducted power supply is abnormal through the corresponding driving power supply, the control circuit 30 will generate a corresponding control signal to control the switch circuit 40 to disconnect the power supply path of the abnormal driving power supply to the LED, and at the same time conduct the power supply path of other normal driving power supplies to the LED. In this way, when a certain driving power source fails, the driving circuit of the utility model can automatically switch to other normally working driving power sources, thereby effectively improving the service life of the LED. At the same time, the driving circuit of the utility model can automatically switch to other normally working driving power sources, which also improves the fault tolerance and stability of the entire driving circuit and avoids the paralysis of the entire system caused by a single failure point. In addition, since the number of driving power sources can be determined according to actual needs and the power requirements of the LED, the driving circuit of the utility model also has strong flexibility and scalability, and can adapt to LED lighting applications in different occasions and with different needs.

[0058] The present utility model also proposes an LED lighting system, which includes a driving circuit and an LED connected to the driving circuit. The specific structure of the driving circuit refers to the above-mentioned embodiment. Since the LED lighting system adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0059] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A driving circuit, applied to LED, characterized in that: include: A power supply circuit, wherein the power supply circuit includes a plurality of driving power supplies; The power supply circuit is used to be electrically connected to the LED to supply power to the LED; a detection circuit, the detection circuit being electrically connected to the power supply circuit; The detection circuit is used to detect the output voltages of the plurality of driving power supplies respectively and generate corresponding detection signals; A control circuit, the control circuit being electrically connected to the detection circuit; The control circuit is used to generate a corresponding control signal according to the detection signal; A switch circuit, wherein the switch circuit is electrically connected to the power supply circuit and the control circuit respectively; the switch circuit is used to be electrically connected to the LED, and the switch circuit is also used to conduct the power supply path of some of the multiple drive power supplies to the LED according to the control signal.

2. The driving circuit according to claim 1, characterized in that: The detection circuit includes a plurality of voltage-dividing circuits, each of which is connected to each of the plurality of driving power supplies in a one-to-one correspondence, and each of which is electrically connected to the control circuit.

3. The driving circuit according to claim 1, wherein: The switching circuit includes multiple electronic switches, the control circuit has multiple switch control signal output terminals, the controlled terminals of the multiple electronic switches are connected to the multiple switch control signal output terminals in a one-to-one correspondence, the input terminals of the multiple electronic switches are respectively connected to the power supply output terminals of the multiple driving power supplies, and the output terminals of the electronic switches are used to connect the LEDs.

4. The driving circuit according to claim 3, characterized in that: The driving power supply circuit includes a first driving power supply and a second driving power supply, and the switch circuit includes a first electronic switch and a second electronic switch; the control circuit is used to output a control signal to the first electronic switch and the second electronic switch when it is detected that the output voltages of the first driving power supply and the second driving power supply meet the power supply requirements of the LED, so as to cut off the power supply path of the second driving power supply to the LED and turn on the power supply path of the first driving power supply to the LED; The control circuit is also used to output a control signal to the first electronic switch and the second electronic switch when it is detected that the output voltage of the first driving power supply does not meet the power supply requirement corresponding to the LED, so as to cut off the power supply path of the first driving power supply to the LED and turn on the power supply path of the second driving power supply to the LED.

5. The driving circuit according to claim 4, characterized in that: The driving circuit also includes an alarm circuit, which is electrically connected to the control circuit; the alarm circuit is used to sound an alarm when the output voltages of the first driving power supply and the second driving power supply do not meet the power supply requirements corresponding to the LED.

6. The driving circuit according to claim 1, characterized in that: The driving circuit also includes an overcurrent protection circuit electrically connected to the LED and the power circuit; the overcurrent protection circuit is used to disconnect the electrical connection between the LED and the power circuit when the current of the LED exceeds a preset value.

7. The driving circuit according to claim 1, characterized in that: The driving circuit also includes a voltage stabilizing circuit, which is electrically connected to the power supply circuit; the voltage stabilizing circuit is used to stabilize the output voltage of the driving power supply.

8. The driving circuit according to claim 1, characterized in that: The driving circuit also includes a rectifier circuit, which is electrically connected to the power supply circuit; the rectifier circuit is used to convert the alternating current of the driving power supply into direct current for use by the LED.

9. The driving circuit according to claim 1, characterized in that: The driving circuit also includes a filtering circuit, which is electrically connected to the power supply circuit; the filtering circuit is used to filter out noise and interference signals in the output of the driving power supply.

10. An LED lighting system, characterized in that: The invention comprises a driving circuit as claimed in any one of claims 1 to 9, and an LED connected to the driving circuit.

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