Multi-path LED control circuit

Abstract

The utility model relates to a multipath LED control circuit, and belongs to the technical field of LED control. The LED control circuit is provided with a power supply switch for controlling a power supply to supply power to LED lamp circuits, the power supply switch is matched with a grounding switch arranged between the negative electrode and the grounding end of each LED lamp circuit, so that the on-off of each LED lamp circuit is independently controlled, meanwhile, the positive electrodes of all the lamp circuits in the second lamp group are connected with the negative electrode of the first LED lamp circuit in the first lamp group, and the positive electrodes of all the lamp circuits in the second lamp group are connected with the negative electrode of the second LED lamp circuit in the first lamp group. The LED lamp circuits with high illumination intensity and the LED lamp circuits with a large number of LED lamp circuits connected in series are connected in the second lamp set in parallel, when the control module controls the LED lamp circuits in the second lamp set to be powered off, the positive electrodes of the LED lamp circuits in the second lamp set can be grounded through the switch assembly connected with the negative electrode of the first LED lamp circuit, rapid discharging is achieved, and residual light is eliminated.

Description

Technical Field

[0001] This utility model belongs to the field of LED control technology, specifically relating to a multi-channel LED control circuit. Background Technology

[0002] Light-emitting diodes, or LEDs for short, are commonly used light-emitting devices that release energy through the recombination of electrons and holes, and are widely used in the lighting field. In practical applications, to achieve different decorative effects or different lighting intensities, multiple LED light paths are usually connected in parallel in the same control circuit. However, during the switching between multiple LED light paths, some LED paths may not discharge in time, resulting in residual light remaining after power is cut off, especially in light paths formed by multiple LEDs connected in series. This affects the actual lighting effect. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a multi-channel LED control circuit.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A multi-channel LED control circuit, comprising:

[0006] The first lighting group includes one LED light path;

[0007] The second light group is composed of several LED light circuits connected in parallel, and the positive terminals of the LED light circuits in the second light group are all connected to the negative terminals of the first LED light circuits.

[0008] The first power supply switch is connected to the positive terminal of the power supply and the positive terminal of all LED light paths in the first lamp group.

[0009] The second power supply switch is connected to the positive terminal of the power supply and the positive terminal of all LED light paths in the second lamp group.

[0010] A grounding switch is connected between the negative terminal of each LED light path and the power ground.

[0011] The control module is electrically connected to the first power supply switch, the second power supply switch, and the grounding switch, respectively.

[0012] In this system, each LED light path of the first and second light groups consists of one or more LEDs connected in series. The positive terminal of the LED light path is the positive terminal of the first LED in the path, and the negative terminal of the LED light path is the negative terminal of the last LED in the path.

[0013] According to some embodiments of the present invention, the first lamp group further includes several second LED lamp paths connected in parallel with the first LED lamp path; the positive terminal of the first LED lamp path is connected to the positive terminal of several second LED lamp paths, and the negative terminal of the first LED lamp path is connected to the negative terminal of several second LED lamp paths.

[0014] According to some embodiments of the present invention, the second lamp group is composed of several third LED lamp paths connected in parallel. The grounding switch includes a first grounding switch and a second grounding switch. The first grounding switch is connected between the negative terminal of the first LED lamp path and the power supply ground. The second grounding switch is connected between the negative terminal of the second LED lamp path and the power supply ground, and between the negative terminal of the third LED lamp path and the power supply ground, respectively. One second LED lamp path and one third LED lamp path are connected to one second grounding switch.

[0015] According to some embodiments of the present invention, the positive terminals of all LED light paths in the first light group are connected to the positive terminal of one LED light path in the second light group.

[0016] According to some embodiments of the present invention, the second lamp group is composed of several third LED lamp paths connected in parallel. The grounding switch includes a first grounding switch and a second grounding switch. The first grounding switch is connected between the negative terminal of the first LED lamp path and the power supply ground. The second grounding switch is connected between the negative terminal of the second LED lamp path and the power supply ground, and between the negative terminal of the third LED lamp path and the power supply ground, respectively. Each second LED lamp path and each third LED lamp path is respectively connected to a second grounding switch.

[0017] According to some embodiments of the present invention, the second lamp group is composed of a fourth LED lamp path and several fifth LED lamp paths connected in parallel, and the negative terminal of the fourth LED lamp path is connected to the positive terminal of all LED lamp paths in the first lamp group respectively.

[0018] The grounding switch includes a first grounding switch, a second grounding switch, and a third grounding switch. The first grounding switch is connected between the negative terminal of the first LED light path and the power ground. The second grounding switch is connected between the negative terminal of the second LED light path and the power ground, and between the negative terminal of the fifth LED light path and the power ground. Each second LED light path and each fifth LED light path is connected to a corresponding second grounding switch. The third grounding switch is connected between the negative terminal of the fourth LED light path and the power ground.

[0019] According to some embodiments of this utility model, a switch assembly is also provided, which is connected to the power ground and the positive terminal of all LED light paths in the first lamp group, respectively, and is used to control the connection and disconnection between the positive terminal of the LED light path in the first lamp group and the power ground; the control module is electrically connected to the switch assembly.

[0020] According to some embodiments of this utility model, the switching component is an NMOS transistor, the gate of the switching component is connected to the control module, the source of the switching component is connected to the power supply ground, and the drain of the switching component is connected to the positive terminal of all LED light paths in the first lamp group.

[0021] According to some embodiments of the present invention, both the first power supply switch and the second power supply switch are PMOS transistors;

[0022] The gate of the first power supply switch is connected to the control module, the source of the first power supply switch is connected to the positive terminal of the power supply, and the drain of the first power supply switch is connected to the positive terminal of all LED light paths in the first lamp group.

[0023] The gate of the second power supply switch is connected to the control module, the source of the second power supply switch is connected to the positive terminal of the power supply, and the drain of the second power supply switch is connected to the positive terminal of all LED light paths in the second lamp group.

[0024] According to some embodiments of the present invention, the first power supply switch and the second power supply switch are respectively connected to the control module through a first transistor and a second transistor;

[0025] The source of the first power supply switch is connected to the collector of the first transistor, the emitter of the first transistor is connected to the power ground, and the base of the first transistor is connected to the control module and receives the potential signal from the control module.

[0026] The source of the second power supply switch is connected to the collector of the second transistor, the emitter of the second transistor is connected to the power ground, and the base of the second transistor is connected to the control module and receives the potential signal from the control module.

[0027] Both the first transistor and the second transistor are PNP type transistors.

[0028] According to some embodiments of this utility model, the grounding switches are all NMOS transistors. The gate of the grounding switch is connected to the control module and receives the potential signal from the control module. The source of the grounding switch is connected to the power supply ground, and the drain of the grounding switch is connected to the negative terminal of the LED light path.

[0029] A multi-channel LED control circuit according to an embodiment of the present utility model has at least the following technical effects:

[0030] 1. By setting a power supply switch that controls the on / off of the LED light path, and cooperating with the grounding switch set at the negative terminal and grounding terminal of each LED light path, individual control of the on / off of each LED light path can be achieved. At the same time, the positive terminal of all the light paths in the second light group is connected to the negative terminal of the first LED light path in the first light group. The LED light paths with strong light intensity and the LED light paths with a large number of series LED light paths are connected in parallel in the second light group. When the control module controls the LED light path in the second light group to cut off the power, the positive terminal of the LED light path in the second light group can be grounded through the switch component connected to the negative terminal of the first LED light path to achieve rapid discharge and eliminate residual light.

[0031] 2. One LED light path in the first light group and one LED light path in the second light group share a grounding switch, which can reduce the number of control switches required in the multi-LED control circuit, improve the convenience of installation and wiring of the multi-LED light path, and reduce the selection requirements of the control module in the multi-LED control circuit. Attached Figure Description

[0032] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0033] Figure 1 This is a circuit diagram of the control circuit provided in one embodiment of the present invention;

[0034] Figure 2 This is a circuit diagram of the control circuit provided in one embodiment of the present invention;

[0035] Figure 3 This is a circuit diagram of the control circuit provided in one embodiment of the present invention;

[0036] Figure 4 This is a circuit diagram of the control circuit provided in one embodiment of the present invention;

[0037] Figure 5 This is a circuit diagram of the control circuit provided in one embodiment of the present invention;

[0038] Figure 6 This is a circuit diagram of the control circuit provided in one embodiment of the present invention;

[0039] Reference numerals: IC1, Control module; D1, First LED light path; D2, Second LED light path; D3, Third LED light path; D4, Fourth LED light path; D5, Fifth LED light path; Q1, Second power supply switch; Q2, First power supply switch; Q3, First transistor; Q4, Second transistor; Q5, Third grounding switch; Q6, Sixth MOSFET; Q7, First grounding switch; Q8, Eighth MOSFET; Q9, Switch assembly. Detailed Implementation

[0040] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0041] Please refer to Figure 1-6 In one embodiment, this utility model provides a multi-channel LED control circuit, comprising:

[0042] The first light group includes the first LED light path D1;

[0043] The second light group is composed of several LED light circuits connected in parallel. The positive terminals of the LED light circuits in the second light group are all connected to the negative terminal of the first LED light circuit D1.

[0044] The first power supply switch Q2 is connected to the positive terminal of the power supply and the positive terminal of all LED light paths in the first lamp group.

[0045] The second power supply switch Q1 is connected to the positive terminal of the power supply and the positive terminal of all LED light paths in the second lamp group.

[0046] Grounding switch: A grounding switch is connected between the negative terminal of each LED light circuit and the power ground.

[0047] Control module IC1 is connected to the first power supply switch Q2, the second power supply switch Q1, and the grounding switch, respectively, and is used to control the on and off of the first power supply switch Q2, the second power supply switch Q1, and the grounding switch;

[0048] In this system, each LED light path in the first and second light groups consists of one or more LEDs connected in series. The positive terminal of each LED path is the positive terminal of the first LED in that path, and the negative terminal is the negative terminal of the last LED in that path. The positive and negative terminals of the multiple LEDs in the same path face the same direction, allowing current to flow from the positive terminal of the first LED to the negative terminal of the last LED in each path.

[0049] In this embodiment, the multiple LED light paths are configured into a first light group and a second light group. The power supply to the first light group and the second light group is controlled by the first power supply switch Q2 and the second power supply switch Q1, respectively. By setting a node switch between the negative terminal of each LED light path and the power ground, the on / off state of each LED light path circuit can be controlled individually. At the same time, the positive terminals of all LED light paths in the second light group are connected to the negative terminal of the first light path D1 in the first light group. When the control module IC1 controls the LED light path in the second light group to cut off the power, the positive terminal of the LED light path in the second light group can be grounded through the grounding switch connected to the negative terminal of the first light path D1, so as to quickly discharge and eliminate residual light.

[0050] In some embodiments, LED light circuits with lower illuminance, such as decorative LED light circuits and light circuits with a small number of LEDs connected in series, are connected in parallel to a first light group; LED light circuits with higher illuminance, such as lighting LED light circuits and light circuits with a large number of LEDs connected in series, are connected in parallel to a second light group. This facilitates the rapid and complete extinguishing of LED light circuits when switching between multiple LED light circuits, improving the lighting effect of the light circuits.

[0051] Please refer to Figure 1-2 In a further embodiment of the present invention, the first lamp group further includes several second LED lamp paths D2 connected in parallel with the first LED lamp path D1; the positive terminal of the first LED lamp path D1 is connected to the positive terminals of several second LED lamp paths, and the negative terminal of the first LED lamp path D1 is connected to the negative terminals of several second LED lamp paths D2.

[0052] In some embodiments, when any LED path in the first light group is active, all LED paths in the second light group are inactive; conversely, when any LED path in the second light group is active, all LED paths in the first light group are inactive. For details, please refer to [reference needed]. Figure 1-5 This can be achieved by controlling the first power supply switch Q2 and the second power supply switch Q1 through the control module IC1. For example, when the control module IC1 controls the first power supply switch Q2 to be turned on, supplying power to the LED light path in the first lamp group, the control module IC1 controls the second power supply switch Q1 to be turned off; when the control module IC1 controls the second power supply switch Q1 to be turned on, supplying power to the LED light path in the second lamp group, the control module IC1 controls the first power supply switch Q2 to be turned off. It is understandable that this can also be achieved in other ways.

[0053] Please refer to Figure 1-3In a further embodiment of this utility model, the second lamp group is composed of several third LED lamp paths D3 connected in parallel. The grounding switch includes a first grounding switch Q7 and a second grounding switch. The first grounding switch Q7 is connected between the negative terminal of the first LED lamp path D1 and the power supply ground. The second grounding switch is connected between the negative terminal of the second LED lamp path D2 and the power supply ground, and between the negative terminal of the third LED lamp path D3 and the power supply ground. One second LED lamp path D2 and one third LED lamp path D3 are respectively connected to one second grounding switch.

[0054] In this embodiment, the second lamp group is composed of several third LED lamp paths D3 connected in parallel. One second LED lamp path D2 and one third LED lamp path D3 share the same second grounding switch, which can reduce the number of control switches required for the entire LED control circuit, improve the convenience of installation and wiring of multiple LED lamp paths, and reduce the selection requirements of the control module IC1 in the multi-channel LED control circuit.

[0055] The number of the second grounding switches is the larger of the number of the second LED light circuit D2 and the number of the third LED light circuit D3.

[0056] Please refer to Figure 1 In some embodiments, the number of second LED light paths D2 is greater than the number of third LED light paths D3. Figure 1 In the circuit diagram, the second LED light path D2 has two paths, while the third LED light path D3 has only one path. The number of second grounding switches is the same as that of the second LED light path D2, which is two: the sixth MOSFET Q6 and the eighth MOSFET Q8. Please refer to the diagram for details. Figure 1

[0057] Please refer to Figure 2 In some embodiments, the number of second LED light paths D2 is greater than the number of third LED light paths D3. Figure 1 The circuit diagram shows that the second LED path D2 has two paths, and the third LED path D3 also has two paths. The number of second grounding switches is the same as the number of switches in both the second and third LED paths D2 and D3—two in total: the sixth MOSFET Q6 and the eighth MOSFET Q8. Please refer to the diagram for details. Figure 2

[0058] It is understood that in some embodiments, when the number of third LED light paths D3 is greater than the number of second LED light paths D2, the number of second grounding switches is the same as the number of second LED light paths D2.

[0059] In a further embodiment of this utility model, the positive terminals of all LED light paths in the first light group are connected to the positive terminal of one LED light path in the second light group.

[0060] Please refer to Figure 3-4 In a further embodiment of this utility model, the second lamp group is composed of a fourth LED lamp path D4 and several fifth LED lamp paths D5 connected in parallel, and the negative terminal of the fourth LED lamp path D4 is connected to the positive terminal of all LED lamp paths in the first lamp group.

[0061] The grounding switch includes a first grounding switch Q7, a second grounding switch, and a third grounding switch Q5. The first grounding switch Q7 is connected between the negative terminal of the first LED light path D1 and the power supply ground. The second grounding switches are respectively connected between the negative terminal of the second LED light path D2 and the power supply ground, and between the negative terminal of the fifth LED light path D5 and the power supply ground. Each second LED light path D2 and each fifth LED light path D5 is connected to a corresponding second grounding switch. The third grounding switch Q5 is connected between the negative terminal of the fourth LED light path D4 and the power supply ground.

[0062] In the second light group, the number of LED light path D5 can be zero. Please refer to the following for details. Figure 3 The number of LEDs in the second LED path D2 in the first light group can also be zero. Please refer to [reference needed] for details. Figure 6 .

[0063] In this embodiment, the second lamp group consists of a fourth LED light path D4 and several fifth LED light paths D5 connected in parallel. The negative terminal of the fourth LED light path D4 is connected to the positive terminal of all LED light paths in the first lamp group. The third grounding switch Q5 is connected between the negative terminal of the fourth LED light path D4 and the power supply ground. While connected to the negative terminal of the fourth LED light path D4, the third grounding switch Q5 is also connected to the positive terminal of all LED light paths in the first lamp group. When the control module IC1 controls the LED light paths in the first lamp group to be de-energized, the positive terminals of the LED light paths in the first lamp group can be grounded through the third grounding switch Q5, achieving rapid discharge.

[0064] Please refer to Figure 6 When the first lamp path D1 is working, the control module IC1 controls the first power supply switch Q2 and the first grounding switch Q7 to be turned on, and controls the sixth MOSFET Q6 to be turned off; when the fourth lamp path D4 is working, the control module IC1 controls the second power supply switch Q1 and the sixth MOSFET Q6 to be turned on, and controls the first grounding switch Q7 to be turned off; in some embodiments, the control module IC1 increases the frequency of the alternating on and off of the first lamp path D1 and the fourth lamp path D4 to achieve the visual effect of the first lamp path D1 and the fourth lamp path D4 being constantly lit at the same time.

[0065] Please refer to Figure 5In a further embodiment of this utility model, a switch component Q9 is also provided. The switch component Q9 is connected to the power ground and the positive terminal of all LED light paths in the first lamp group, respectively, and is used to control the connection and disconnection between the positive terminal of the LED light path in the first lamp group and the power ground. The control module IC1 is connected to the switch component Q9 and is used to control the connection and disconnection of the switch component Q9.

[0066] In this embodiment, a separate switch component Q9 is provided, which is connected to the positive terminal and the ground terminal of all LED light paths in the first lamp group respectively. When the control module IC1 controls the LED light path in the first lamp group to be de-energized, the positive terminal of the LED light path in the first lamp group can be grounded through the switch component Q9 to achieve rapid discharge.

[0067] In a further embodiment of this utility model, both the first power supply switch Q2 and the second power supply switch Q1 are PMOS transistors;

[0068] The gate of the first power supply switch Q2 is connected to the control module IC1, the source of the first power supply switch Q2 is connected to the positive terminal of the power supply, and the drain of the first power supply switch Q2 is connected to the positive terminal of all LED light paths in the first lamp group.

[0069] The gate of the second power supply switch Q1 is connected to the control module IC1, the source of the second power supply switch Q1 is connected to the positive terminal of the power supply, and the drain of the second power supply switch Q1 is connected to the positive terminal of all LED light paths in the second lamp group.

[0070] In this embodiment, both the first power supply switch Q2 and the second power supply switch Q1 are PMOS transistors. The control module IC1 is connected to the gate of the first power supply switch Q2 and the gate of the second power supply switch Q1, respectively. The control module IC1 controls the on / off state of the first power supply switch Q2 and the second power supply switch Q1 by outputting high and low level signals.

[0071] In a further embodiment of this utility model, the first power supply switch Q2 and the second power supply switch Q1 are respectively connected to the control module IC1 through the first transistor Q3 and the second transistor Q4;

[0072] The source of the first power supply switch Q2 is connected to the collector of the first transistor Q3, the emitter of the first transistor Q3 is connected to the power supply ground, and the base of the first transistor Q3 is connected to the control module IC1.

[0073] The source of the second power supply switch Q1 is connected to the collector of the second transistor Q4, the emitter of the second transistor Q4 is connected to the power supply ground, and the base of the second transistor Q4 is connected to the control module IC1.

[0074] Both the first transistor Q3 and the second transistor Q4 are PNP type transistors.

[0075] When the LED light path in the first lamp group needs power, the control module IC1 outputs a low-level signal to the base of the first transistor Q3, the first transistor Q3 is turned on, the gate of the first power supply switch Q2 is grounded through the first transistor Q3, the first power supply switch Q2 is turned on, and the power supply provides power to the LED light path in the first lamp group.

[0076] When the LED light path in the second lamp group needs power, the control module IC1 outputs a low-level signal to the base of the second transistor Q4, the second transistor Q4 is turned on, the gate of the second power supply switch Q1 is grounded through the second transistor Q4, the second power supply switch Q1 is turned on, and the power supply provides power to the LED light path in the second lamp group.

[0077] The gates of the first power supply switch Q2 and the second power supply switch Q1 are each connected to a pull-up resistor R2.

[0078] In this embodiment, the first power supply switch Q2 and the second power supply switch Q1 are connected to the control module IC1 through the first transistor Q3 and the second transistor Q4, respectively. The control module IC1 controls whether the gate of the power supply switch is grounded by controlling the switching of the transistors. When the gate of the power supply switch is not grounded, a high-level signal is input through the pull-up resistor R2.

[0079] In a further embodiment of this invention, the grounding switches are all NMOS transistors. The gate of the grounding switch is connected to the control module IC1, the source of the grounding switch is connected to the power ground, and the drain of the grounding switch is connected to the negative terminal of the LED light path. When the LED light path needs to be grounded through the grounding switch, the control module IC1 outputs a high-level signal to the corresponding grounding switch. When the gate of the grounding switch receives the high-level signal from the control module IC1, it conducts, the source and drain are connected, and the LED light path is grounded.

[0080] The grounding switch also has a pull-down resistor connected to its gate. When the grounding switch does not receive a high-level signal from the control module IC1, it is grounded through the pull-down resistor, maintaining the grounding switch in its off state.

[0081] In a further embodiment of this utility model, the switching component Q9 is an NMOS transistor. The gate of the switching component Q9 is connected to the control module IC1, the source of the switching component Q9 is connected to the power supply ground, and the drain of the switching component Q9 is connected to the positive terminal of each LED path in the first lamp group.

[0082] When the first LED light path D1 needs to be grounded through the grounding switch, or when the positive terminal of the LED light path in the second light group needs to be discharged, the control module IC1 outputs a high-level signal to the switching component Q9. When the gate of the switching component Q9 receives the high-level signal from the control module IC1, it turns on, and the source and drain are connected. The first LED light path D1 is then grounded.

[0083] The gate of the switching component Q9 is also connected to a pull-down resistor R6. When the switching component Q9 does not receive a high-level signal from the control module IC1, it is grounded through the pull-down resistor R6, maintaining the off state of the switching component Q9.

[0084] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A multi-channel LED control circuit, characterized in that, include: The first light group includes one first LED light path (D1); The second light group is composed of several LED light paths connected in parallel. The positive terminals of the LED light paths in the second light group are all connected to the negative terminals of the first LED light path (D1). The first power supply switch (Q2) is connected to the positive terminal of the power supply and the positive terminal of all LED light paths in the first lamp group; The second power supply switch (Q1) is connected to the positive terminal of the power supply and the positive terminal of all LED light paths in the second lamp group. A grounding switch is connected between the negative terminal of each LED light path and the power ground. The control module (IC1) is electrically connected to the first power supply switch (Q2), the second power supply switch (Q1), and the grounding switch, respectively. In this configuration, each LED light path of the first light group and the second light group consists of one or more LEDs connected in series. The positive terminal of the LED light path is the positive terminal of the first LED in the path, and the negative terminal of the LED light path is the negative terminal of the last LED in the path.

2. The multi-channel LED control circuit according to claim 1, characterized in that, The first light group also includes several second LED light paths (D2) connected in parallel with the first LED light path (D1); the positive terminal of the first LED light path (D1) is connected to the positive terminals of the several second LED light paths (D2), and the negative terminal of the first LED light path (D1) is connected to the negative terminals of the several second LED light paths (D2).

3. The multi-channel LED control circuit according to claim 2, characterized in that, The second light group is composed of several third LED light paths (D3) connected in parallel. The grounding switch includes a first grounding switch (Q7) and a second grounding switch. The first grounding switch (Q7) is connected between the negative terminal of the first LED light path (D1) and the power supply ground. The second grounding switch is connected between the negative terminal of the second LED light path (D2) and the power supply ground, and between the negative terminal of the third LED light path (D3) and the power supply ground. One second LED light path (D2) and one third LED light path (D3) are connected to one second grounding switch.

4. A multi-channel LED control circuit according to claim 1 or 2, characterized in that, The positive terminals of all LED light paths in the first light group are connected to the negative terminal of one LED light path in the second light group.

5. A multi-channel LED control circuit according to claim 4, characterized in that, The second light group is composed of a fourth LED light path (D4) and several fifth LED light paths (D5) connected in parallel. The negative terminal of the fourth LED light path (D4) is connected to the positive terminal of all LED light paths in the first light group. The grounding switch includes a first grounding switch (Q7), a second grounding switch, and a third grounding switch (Q5). The first grounding switch (Q7) is connected between the negative terminal of the first LED light path (D1) and the power supply ground. The second grounding switch is connected between the negative terminal of the second LED light path (D2) and the power supply ground, and between the negative terminal of the fifth LED light path (D5) and the power supply ground. One second LED light path (D2) and one fifth LED light path (D5) are connected to one second grounding switch. The third grounding switch (Q5) is connected between the negative terminal of the fourth LED light path (D4) and the power supply ground.

6. A multi-channel LED control circuit according to claim 1, characterized in that, A switch assembly (Q9) is also provided, which is connected to the power ground and the positive terminal of all LED light paths in the first lamp group; the control module (IC1) is electrically connected to the switch assembly (Q9).

7. A multi-channel LED control circuit according to claim 6, characterized in that, The switching component (Q9) is an NMOS transistor. The gate of the switching component (Q9) is connected to the control module (IC1), the source of the switching component (Q9) is connected to the power supply ground, and the drain of the switching component (Q9) is connected to the positive terminal of all LED light paths in the first lamp group.

8. A multi-channel LED control circuit according to claim 1, characterized in that, Both the first power supply switch (Q2) and the second power supply switch (Q1) are PMOS transistors; The gate of the first power supply switch (Q2) is connected to the control module (IC1), the source of the first power supply switch (Q2) is connected to the positive terminal of the power supply, and the drain of the first power supply switch (Q2) is connected to the positive terminal of all LED light paths in the first lamp group. The gate of the second power supply switch (Q1) is connected to the control module (IC1), the source of the second power supply switch (Q1) is connected to the positive terminal of the power supply, and the drain of the second power supply switch (Q1) is connected to the positive terminal of all LED light paths in the second lamp group.

9. A multi-channel LED control circuit according to claim 8, characterized in that, The first power supply switch (Q2) and the second power supply switch (Q1) are respectively connected to the control module (IC1) through the first transistor (Q3) and the second transistor (Q4); The source of the first power supply switch (Q2) is connected to the collector of the first transistor (Q3), the emitter of the first transistor (Q3) is connected to the power supply ground, and the base of the first transistor (Q3) is connected to the control module (IC1) and receives the potential signal from the control module (IC1). The source of the second power supply switch (Q1) is connected to the collector of the second transistor (Q4), the emitter of the second transistor (Q4) is connected to the power supply ground, and the base of the second transistor (Q4) is connected to the control module (IC1) and receives the potential signal from the control module (IC1). Both the first transistor (Q3) and the second transistor (Q4) are PNP type transistors.

10. A multi-channel LED control circuit according to claim 1, characterized in that, All grounding switches are NMOS transistors. The gate of each grounding switch is connected to the control module (IC1) and receives the potential signal from the control module (IC1). The source of each grounding switch is connected to the power supply ground, and the drain of each grounding switch is connected to the negative terminal of the LED light path.

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