LED synchronous control circuit and LED lamp

Abstract

This invention relates to the field of lighting control technology, providing an LED synchronous control circuit and an LED lighting fixture. The LED synchronous control circuit includes: a power detection module, a switch module, and a first resistor. The power detection module has its input terminal connected to the power module and its output terminal connected to the control terminal of the switch module. It is used to detect the power supply signal of the power module and send the detected power supply signal to the control terminal of the switch module. The switch module and the first resistor are connected in series between the anode and cathode of the white light string in the white light emission circuit. When the power detection module detects a power outage, it controls the switch module to open, and the anode of the white light string in the white light emission circuit discharges rapidly through the first resistor, causing the white light to extinguish quickly and preventing the white light from flickering.

Description

Technical Field

[0001] The invention belongs to the technical field of lamp control, and in particular relates to an LED synchronous control circuit and an LED lamp. Background Art

[0002] LED (Light Emitting Diode) light sources have been widely used due to their advantages such as high efficiency, energy saving, environmental protection, long life and strong controllability. LED colored lights are generally composed of white light emitting circuits and colored light emitting circuits, which work independently.

[0003] With current technology, when the power of LED colored lights is turned off, the white light and the colored light cannot be turned off at the same time, which will cause flashing white light, affect the visual effect, and the user experience is not good enough. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides an LED synchronous control circuit and an LED lamp to solve the problem in the prior art that the white light and the colored light cannot be turned off at the same time when the LED colored light is turned off.

[0005] A first aspect of an embodiment of the present invention provides an LED synchronous control circuit for controlling an LED lamp, wherein the LED lamp comprises: a power module, a white light emitting circuit and a color light emitting circuit; the power module is connected to a power supply end of the white light emitting circuit and a power supply end of the color light emitting circuit respectively;

[0006] The LED synchronous control circuit includes: a power detection module, a switch module and a first resistor;

[0007] A power detection module, the input end of which is connected to the power module, and the output end of which is connected to the control end of the switch module, for detecting the power supply signal of the power module and sending the detected power supply signal to the control end of the switch module;

[0008] A switch module, wherein a first end is connected to an anode of a white light string of a white light emitting circuit through a first resistor, and a second end is connected to a cathode of the white light string of the white light emitting circuit; or,

[0009] The switch module has a first end connected to the anode of the white light string of the white light emitting circuit, and a second end connected to the cathode of the white light string of the white light emitting circuit through a first resistor.

[0010] A second aspect of the embodiments of the present invention provides an LED lamp, including a power module, a white light emitting circuit, a color light emitting circuit, a main control module, and an LED synchronous control circuit as provided in the first aspect of the embodiments of the present invention;

[0011] The power supply module is connected to the power supply end of the white light emitting circuit and the power supply end of the color light emitting circuit respectively;

[0012] The main control module is connected to the control end of the white light emitting circuit and the control end of the color light emitting circuit respectively.

[0013] The embodiment of the present invention provides an LED synchronous control circuit including: a power detection module, a switch module and a first resistor; the power detection module, the input end is connected to the power module, the output end is connected to the control end of the switch module, and is used to detect the power supply signal of the power module, and send the detected power supply signal to the control end of the switch module; the switch module, the first end is connected to the anode of the white light string of the white light emitting circuit through the first resistor, and the second end is connected to the cathode of the white light string of the white light emitting circuit; or, the switch module, the first end is connected to the anode of the white light string of the white light emitting circuit, and the second end is connected to the cathode of the white light string of the white light emitting circuit through the first resistor. When the power detection module detects that the power is off, the switch module is controlled to open, and the white light string of the white light emitting circuit is quickly discharged through the first resistor, so that the white light is quickly extinguished without flashing, and the visual effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a circuit structure diagram of an LED synchronous control circuit provided by an embodiment of the present invention;

[0016] Figure 2 It is a partial circuit schematic diagram of a power module, a white light emitting circuit and a power detection module provided in an embodiment of the present invention;

[0017] Figure 3 is a circuit schematic diagram of a switch module provided in an embodiment of the present invention;

[0018] Figure 4 is a schematic diagram of a circuit structure of an LED lamp provided by an embodiment of the present invention;

[0019] Figure 5 is a circuit schematic diagram of a standby module provided in an embodiment of the present invention;

[0020] Figure 6 is a circuit schematic diagram of a first voltage reduction unit provided in an embodiment of the present invention;

[0021] Figure 7 is a circuit schematic diagram of a second voltage reduction unit provided in an embodiment of the present invention;

[0022] Figure 8 It is a circuit principle diagram of a color light emitting circuit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0024] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0025] refer to Figure 1 The embodiment of the present invention provides an LED synchronous control circuit for controlling an LED lamp, wherein the LED lamp comprises: a power module 11, a white light emitting circuit 12 and a color light emitting circuit 13; the power module 11 is connected to a power supply end of the white light emitting circuit 12 and a power supply end of the color light emitting circuit 13 respectively;

[0026] The LED synchronous control circuit includes: a power detection module 14, a switch module 15 and a first resistor Rt1;

[0027] A power detection module 14, whose input end is connected to the power module 11 and whose output end is connected to the control end of the switch module 15, is used to detect the power supply of the power module 11 and send the detected power supply signal to the control end of the switch module 15;

[0028] The switch module 15 has a first end connected to the anode of the white light string W1 of the white light emitting circuit 12 through a first resistor Rt1, and a second end connected to the cathode of the white light string W1 of the white light emitting circuit 12; or,

[0029] The switch module 15 has a first end connected to the anode of the white light string W1 of the white light emitting circuit 12 , and a second end connected to the cathode of the white light string W1 of the white light emitting circuit 12 via a first resistor Rt1 .

[0030] Since the control signals of the white light emitting circuit 12 and the color light emitting circuit 13 cannot be strictly synchronized, the color light may go out before the white light; or since the electrolytic capacitors are connected in parallel at both ends of the white light string W1 in the white light emitting circuit 12, when the power supply of the power module 11 is disconnected, the electrolytic capacitors discharge, causing the white light to go out later, and the visual experience is that the white light flashes after the color light, and the visual effect is not good. The embodiment of the present invention provides an LED synchronous control circuit, the power detection module 14 detects the power supply of the power module 11, and when it is detected that the power supply is disconnected, the switch module 15 is controlled to be turned on, and the anode of the white light string W1 is quickly discharged through the first resistor Rt1, ensuring that the white light string W1 can be quickly extinguished, and there will be no white light flashing, and the visual effect is good. When the power detection module 14 detects that the power supply is normal, the switch module 15 is disconnected, and the light emission of the white light string W1 is not affected.

[0031] In some embodiments, reference Figure 2 , the power detection module 14 may include: a voltage stabilizing diode D6, a second resistor R13, a third resistor R14, a twenty-fifth resistor, a first capacitor C7 and an inverter;

[0032] A voltage zener diode D6, an anode of which is grounded, and a cathode of which is respectively connected to the first end of the twenty-fifth resistor and the first end of the second resistor R13;

[0033] An inverter, the input end of which is respectively connected to the second end of the second resistor R13, the first end of the third resistor R14 and the first end of the first capacitor C7, and the output end is connected to the output end of the power detection module 14;

[0034] The second end of the twenty-fifth resistor is connected to the input end of the power detection module 14;

[0035] A second end of the first capacitor C7 and a second end of the third resistor R14 are both grounded.

[0036] When the power supply of the power module 11 is disconnected, the input end of the power detection module 14 detects a low level, the input end of the inverter is a low level, the power detection module 14 outputs a high level to control the switch module 15 to turn on, and the white light emitting circuit 12 discharges; when the power supply module 11 is powered normally, the input end of the power detection module 14 is a high level, the second resistor R13 and the third resistor R14 output a high level after voltage division, and output a low level after inversion to control the switch module 15 to disconnect.

[0037] In some embodiments, reference Figure 3 , the switch module 15 may include: an optical coupler U2, a first switch tube Q3, a second switch tube TL1, a fourth resistor Ro1, a fifth resistor Rs1 and a sixth resistor R11;

[0038] Optocoupler U2, a first input end connected to the first power supply end through the fourth resistor Ro1, a second input end connected to the first end of the first switch tube Q3, a first output end connected to the anode of the white light string W1 of the white light emitting circuit 12, and a second output end respectively connected to the first end of the sixth resistor R11 and the control end of the second switch tube TL1;

[0039] A first switch tube Q3, a control end of which is respectively connected to the control end of the switch module 15 and the first end of the fifth resistor Rs1, and a second end of which is grounded;

[0040] A second switch tube TL1, a first end of which is connected to the first end of the switch module 15, and a second end of which is connected to the second end of the switch module 15;

[0041] A second end of the fifth resistor Rs1 and a second end of the sixth resistor R11 are both grounded.

[0042] In the embodiment of the present invention, the switch module 15 uses the first switch tube Q3 to control the optocoupler U2, and controls the on and off of the second switch tube TL1 through the optocoupler U2 to achieve conduction between the anode and cathode of the white light string W1. The optocoupler U2 is used for isolation control, which has fast speed and strong anti-interference ability.

[0043] In some embodiments, the first switch tube Q3 may be an NMOS tube.

[0044] In some embodiments, the second switch tube TL1 may be a unidirectional thyristor;

[0045] The unidirectional thyristor has a positive electrode connected to the first end of the second switch tube TL1 , a negative electrode connected to the second end of the second switch tube TL1 , and a control electrode connected to the control end of the second switch tube TL1 .

[0046] Corresponding to the above LED synchronous control circuit, refer to Figure 4 , the embodiment of the present invention further provides an LED lamp, comprising: a power module 11, a white light emitting circuit 12, a color light emitting circuit 13, a main control module 16 and any one of the LED synchronous control circuits provided in the above-mentioned embodiment of the invention;

[0047] The power module 11 is connected to the power supply end of the white light emitting circuit 12 and the power supply end of the color light emitting circuit 13 respectively;

[0048] The main control module 16 is connected to the control end of the white light emitting circuit 12 and the control end of the color light emitting circuit 13 respectively.

[0049] In some embodiments, reference Figure 5 , the LED lamp may further include: a standby module 17;

[0050] The standby module 17 includes: a third switch tube Q1, a fourth switch tube Q2, a seventh resistor R5, an eighth resistor R10 and a ninth resistor R12;

[0051] The fourth switch tube Q2 has a first end connected to the second end of the seventh resistor R5 and the control end of the third switch tube Q1 through the eighth resistor R10, a second end connected to ground, and a control end connected to the main control module 16 and the first end of the ninth resistor R12;

[0052] The third switch tube Q1 has a first end connected to the power supply end of the color light emitting circuit 13, and a second end connected to the power module 11 and the first end of the seventh resistor R5 respectively;

[0053] A second terminal of the ninth resistor R12 is grounded.

[0054] When in standby mode, the main control module 16 controls the third switch tube Q1 to turn off through the fourth switch tube Q2, thereby cutting off the power supply of the color light emitting circuit 13 and reducing power consumption.

[0055] In some embodiments, the power module 11 includes: a rectifier unit 111, a filter unit 112, a first buck unit 113 and a second buck unit 114;

[0056] The rectifier unit 111 has an input end connected to the mains, and an output end connected to an input end of the filter unit 112;

[0057] The first step-down unit 113 has an input end connected to the output end of the filter unit 112 and an output end connected to the input end of the second step-down unit 114;

[0058] The output end of the rectifier unit 111 is also connected to the input end of the power detection module 14; the output end of the filter unit 112 is also connected to the power supply end of the white light emitting circuit 12; the output end of the first step-down unit 113 is also connected to the power supply end of the color light emitting circuit 13; the output end of the second step-down unit 114 is connected to the first power supply end.

[0059] In some embodiments, reference Figure 2 , the rectifier unit 111 includes: a rectifier bridge BD1 and a ninth capacitor C5;

[0060] The rectifier bridge BD1 has two input terminals connected to the neutral line and the live line of the mains respectively, a first output terminal connected to the first terminal of the ninth capacitor C5 and the output terminal of the rectifier unit 111, and a second output terminal connected to ground;

[0061] A second terminal of the ninth capacitor C5 is grounded.

[0062] In some embodiments, the power module 11 may further include: a protection unit 115;

[0063] The protection unit 115 includes a current limiting protection element F1 and a varistor RV1.

[0064] The first end of the current limiting protection element F1 is connected to the live line of the mains, the second end of the current limiting protection element F1 is connected to the first end of the varistor RV1, and the second end of the varistor RV1 is connected to the neutral line of the mains. The first end of the varistor RV1 and the second end of the varistor RV1 are respectively connected to the input end of the rectifier unit 111.

[0065] The above components constitute a protection unit 115, which can be used to resist surges and prevent the circuit from being damaged by high-voltage surges.

[0066] The circuit schematic diagram of the filter unit 112 is shown in FIG. Figure 2 The circuit schematic diagram of the first step-down unit 113 is shown in FIG. Figure 6 The circuit schematic diagram of the second step-down unit 114 is shown in FIG. Figure 7 , I will not go into details here.

[0067] In some embodiments, the output end of the second voltage reduction unit 114 is also connected to the power supply end of the main control module 16 .

[0068] In some embodiments, the output terminal voltage of the first buck unit 113 may be +27V, and the output terminal voltage of the second buck unit 114 may be +3.3V.

[0069] In some embodiments, reference Figure 2 The white light emitting circuit 12 includes: a white light lamp string W1, a constant current driving chip U1, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a second capacitor CD1, a third capacitor CD3, a fourth capacitor C6, a fifth capacitor C1, a sixth capacitor C4, a seventh capacitor CD2, a tenth resistor R4, an eleventh resistor R6, a twelfth resistor R3, a thirteenth resistor R1, a fourteenth resistor R8, a fifteenth resistor R9 and an inductor L2;

[0070] The constant current driving chip U1, the power supply terminal HV (pin 4) is respectively connected to the power supply terminal of the white light emitting circuit 12, the cathode of the first diode D1, the first end of the second capacitor CD1, the first end of the twelfth resistor R3, the cathode of the second diode D2, the first end of the thirteenth resistor R1, the first end of the seventh capacitor CD2 and the anode of the white light string W1, the overvoltage detection terminal OVP (pin 1) is grounded through the tenth resistor R4, the dimming control input terminal PWM (pin 7) is respectively connected to the control end of the white light emitting circuit 12, the first end of the fourth capacitor C6 and the first end of the eleventh resistor R6, the ground terminal GND (pin 2) is grounded, the output terminal DRAN (pin 8) is respectively connected to the second end of the fifth capacitor C1, the anode of the second diode D2 and the first end of the inductor L2, the current sampling terminal CS (pin 5) is grounded through the fourteenth resistor R8, and the current sampling terminal CS (pin 5) is also grounded through the fifteenth resistor R9;

[0071] The second end of the second capacitor CD1 is connected to the cathode of the fourth diode D4 and the anode of the third diode D3 respectively;

[0072] The cathode of the third diode D3 is connected to the anode of the first diode D1 and the first end of the third capacitor CD3 respectively;

[0073] The second end of the twelfth resistor R3 is connected to the first end of the fifth capacitor C1;

[0074] The second end of the inductor L2 is respectively connected to the second end of the thirteenth resistor R1, the first end of the sixth capacitor C4, the second end of the seventh capacitor CD2 and the cathode of the white light string W1;

[0075] The second end of the eleventh resistor R6 , the second end of the fourth capacitor C6 , the second end of the sixth capacitor C4 , the second end of the third capacitor CD3 , and the anode of the fourth diode D4 are all grounded.

[0076] In some embodiments, the signal sent by the main control module 16 to the white light emitting circuit 12 is a PWM signal.

[0077] In some embodiments, reference Figure 8 The color light emitting circuit 13 may include: a multi-channel dimming control chip U4, an eighth capacitor C10, a sixteenth resistor R15, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R120, a twentieth resistor R23, a twenty-first resistor R22, a twenty-second resistor R26, a twenty-third resistor R27, a twenty-fourth resistor R28, a red light string, a green light string and a blue light string;

[0078] The multi-channel dimming control chip U4, the power supply terminal VIN (pin 1) is connected to the power supply terminal of the color light emitting circuit 13 through the sixteenth resistor R15, the first dimming input terminal DIM3 (pin 2) is connected to the main control module 16 through the seventeenth resistor R17, the first dimming input terminal DIM3 (pin 2) is also grounded through the eighteenth resistor R18, the second dimming input terminal DIM2 (pin 3) is connected to the main control module 16 through the nineteenth resistor R120, the second dimming input terminal DIM2 (pin 3) is also grounded through the twentieth resistor R23, and the third dimming input terminal DIM2 (pin 3) is connected to the main control module 16 through the nineteenth resistor R120. The input terminal DIM1 (pin 4) is connected to the main control module 16 through the twenty-first resistor R22, the third dimming input terminal DIM1 (pin 4) is also grounded through the twenty-second resistor R26, the current setting terminal R_IN (pin 5) is grounded through the twenty-third resistor R27, and the current setting terminal R_IN (pin 5) is also grounded through the twenty-fourth resistor R28, the first output terminal OUT3 (pin 8), the second output terminal OUT2 (pin 7) and the third output terminal OUT1 (pin 6) are respectively connected to the red light string, the green light string and the blue light string in one-to-one correspondence;

[0079] The eighth capacitor C10 has a first end connected to the power supply terminal VIN (pin 1) of the multi-channel dimming control chip U4, and a second end connected to the ground.

[0080] In some embodiments, the inverter in the power detection module 14 may be disposed in the main control module 16, and the main control module 16 is used to invert the voltage at the second end of the second resistor R13, thereby converting a high level into a low level, or converting a low level into a high level.

[0081] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A LED synchronous control circuit, characterized in that: Used to control an LED lamp, the LED lamp comprising: a power module, a white light emitting circuit and a color light emitting circuit; the power module is connected to the power supply end of the white light emitting circuit and the power supply end of the color light emitting circuit respectively; The LED synchronous control circuit includes: a power detection module, a switch module and a first resistor; The power detection module has an input end connected to the power module and an output end connected to the control end of the switch module, and is used to detect the power supply signal of the power module and send the detected power supply signal to the control end of the switch module; The switch module has a first end connected to the anode of the white light string of the white light emitting circuit through the first resistor, and a second end connected to the cathode of the white light string of the white light emitting circuit; or, The switch module has a first end connected to the anode of the white light string of the white light emitting circuit, and a second end connected to the cathode of the white light string of the white light emitting circuit through the first resistor; The power detection module includes: a voltage stabilizing diode, a second resistor, a third resistor, a twenty-fifth resistor, a first capacitor and an inverter; The voltage stabilizing diode has an anode connected to the ground and a cathode connected to the first end of the twenty-fifth resistor and the first end of the second resistor respectively; The inverter has an input end connected to the second end of the second resistor, the first end of the third resistor and the first end of the first capacitor respectively, and an output end connected to the output end of the power detection module; The second end of the twenty-fifth resistor is connected to the input end of the power detection module; The second end of the first capacitor and the second end of the third resistor are both grounded.

2. The LED synchronous control circuit according to claim 1, characterized in that: The switch module includes: an optical coupler, a first switch tube, a second switch tube, a fourth resistor, a fifth resistor and a sixth resistor; The optocoupler has a first input end connected to the first power supply end through the fourth resistor, a second input end connected to the first end of the first switch tube, a first output end connected to the anode of the white light string of the white light emitting circuit, and a second output end connected to the first end of the sixth resistor and the control end of the second switch tube respectively; The first switch tube has a control end connected to the control end of the switch module and the first end of the fifth resistor, and a second end connected to the ground; The second switch tube has a first end connected to the first end of the switch module and a second end connected to the second end of the switch module; The second end of the fifth resistor and the second end of the sixth resistor are both grounded.

3. The LED synchronous control circuit according to claim 2, characterized in that: The first switch tube is an NMOS tube.

4. The LED synchronous control circuit according to claim 2, characterized in that: The second switch tube is a unidirectional thyristor; The unidirectional thyristor has a positive electrode connected to the first end of the second switch tube, a negative electrode connected to the second end of the second switch tube, and a control electrode connected to the control end of the second switch tube.

5. An LED lamp, characterized in that: It comprises a power supply module, a white light emitting circuit, a color light emitting circuit, a main control module and the LED synchronous control circuit as claimed in any one of claims 1 to 4; The power supply module is connected to the power supply end of the white light emitting circuit and the power supply end of the color light emitting circuit respectively; The main control module is connected to the control end of the white light emitting circuit and the control end of the color light emitting circuit respectively.

6. The LED lamp according to claim 5, characterized in that: Also includes: Standby module; The standby module includes: a third switch tube, a fourth switch tube, a seventh resistor, an eighth resistor and a ninth resistor; The fourth switch tube has a first end connected to the second end of the seventh resistor and the control end of the third switch tube through the eighth resistor, a second end connected to ground, and a control end connected to the main control module and the first end of the ninth resistor; The third switch tube has a first end connected to the power supply end of the color light emitting circuit, and a second end connected to the power module and the first end of the seventh resistor respectively; A second end of the ninth resistor is grounded.

7. The LED lamp according to claim 5, characterized in that: The power module includes: a rectifier unit, a filter unit, a first step-down unit and a second step-down unit; The rectifier unit has an input end connected to the mains, and an output end connected to the input end of the filter unit; The first step-down unit has an input end connected to the output end of the filter unit, and an output end connected to the input end of the second step-down unit; The output end of the rectifier unit is also connected to the input end of the power detection module; the output end of the filter unit is also connected to the power supply end of the white light emitting circuit; the output end of the first step-down unit is also connected to the power supply end of the color light emitting circuit; the output end of the second step-down unit is connected to the first power supply end.

8. The LED lamp according to any one of claims 5 to 7, characterized in that: The white light emitting circuit comprises: a white light lamp string, a constant current driving chip, a first diode, a second diode, a third diode, a fourth diode, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor and an inductor; The constant current driving chip, the power supply end is respectively connected to the power supply end of the white light emitting circuit, the cathode of the first diode, the first end of the second capacitor, the first end of the twelfth resistor, the cathode of the second diode, the first end of the thirteenth resistor, the first end of the seventh capacitor and the anode of the white light lamp string, the overvoltage detection end is grounded through the tenth resistor, the dimming control input end is respectively connected to the first end of the fourth capacitor and the first end of the eleventh resistor of the control end of the white light emitting circuit, the grounding end is grounded, the output end is respectively connected to the second end of the fifth capacitor, the anode of the second diode and the first end of the inductor, the current sampling end is grounded through the fourteenth resistor, and the current sampling end is also grounded through the fifteenth resistor; The second end of the second capacitor is connected to the cathode of the fourth diode and the anode of the third diode respectively; The cathode of the third diode is connected to the anode of the first diode and the first end of the third capacitor respectively; The second end of the twelfth resistor is connected to the first end of the fifth capacitor; The second end of the inductor is respectively connected to the second end of the thirteenth resistor, the first end of the sixth capacitor, the second end of the seventh capacitor and the cathode of the white light string; The second end of the eleventh resistor, the second end of the fourth capacitor, the second end of the sixth capacitor, the second end of the third capacitor, and the anode of the fourth diode are all grounded.

9. The LED lamp according to any one of claims 5 to 7, characterized in that: The color light emitting circuit includes: a multi-channel dimming control chip, an eighth capacitor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a red light string, a green light string and a blue light string; The multi-channel dimming control chip, the power supply end is connected to the power supply end of the color light emitting circuit through the sixteenth resistor, the first dimming input end is connected to the main control module through the seventeenth resistor, the first dimming input end is also grounded through the eighteenth resistor, the second dimming input end is connected to the main control module through the nineteenth resistor, the second dimming input end is also grounded through the twenty-tenth resistor, the third dimming input end is connected to the main control module through the twenty-first resistor, the third dimming input end is also grounded through the twenty-second resistor, the current setting end is grounded through the twenty-third resistor, the current setting end is also grounded through the twenty-fourth resistor, the first output end, the second output end and the third output end are respectively connected to the red light string, the green light string and the blue light string in a one-to-one correspondence; The eighth capacitor has a first end connected to the power supply end of the multi-channel dimming control chip and a second end connected to the ground.

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