Stepless dimming and color modulation driving circuit

Abstract

The utility model discloses a driving circuit for stepless dimming and color modulation. The driving circuit comprises a stepless color modulation module, a stepless dimming module and a driving module, the input end of the electrodeless toning module is used for being connected with a power supply, and the output end of the electrodeless toning module is connected with the power supply control end of the driving module; the electrodeless color modulation module comprises a first electrodeless potentiometer, a first LED unit and a second LED unit, wherein the first LED unit and the second LED unit have different color temperatures. The input end of the first electrodeless potentiometer is used for being connected with a power supply, the first output end of the first electrodeless potentiometer is connected with the first LED unit, the second output end of the first electrodeless potentiometer is connected with the second LED unit, and the control end of the first electrodeless potentiometer is used for distributing resistance values connected with the first LED unit and the second LED unit; the stepless dimming module comprises a second stepless potentiometer, the output end of the second stepless potentiometer is connected with the control input end of the driving module, and the control end of the second stepless potentiometer is used for adjusting the resistance value connected to the driving module, so that stepless dimming and color modulation are achieved.

Description

Technical Field

[0001] This utility model relates to the field of LED driver circuit technology, and in particular to a stepless dimming and color-adjusting driver circuit. Background Technology

[0002] Existing LED dimming and color temperature adjustment products can only switch between different brightness and color temperature levels using conventional DIP switches. That is, brightness and color temperature are limited to a few fixed levels. This makes it impossible for users to precisely adjust the brightness and color temperature to their desired level when using LED lighting fixtures, resulting in a poor user lighting experience. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a stepless dimming and color-adjusting drive circuit to improve the lighting experience.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A stepless dimming and color-tuning driving circuit includes a stepless color-tuning module, a stepless dimming module, and a driving module. The input terminal of the stepless color-tuning module is connected to a power supply, and the output terminal of the stepless color-tuning module is connected to the power control terminal of the driving module. The stepless color-tuning module includes a first stepless potentiometer and a first LED unit and a second LED unit with different color temperatures. The input terminal of the first stepless potentiometer is connected to a power supply, the first output terminal of the first stepless potentiometer is connected to the first LED unit, the second output terminal of the first stepless potentiometer is connected to the second LED unit, and the control terminal of the first stepless potentiometer is used to allocate the resistance values ​​connected to the first LED unit and the second LED unit. The stepless dimming module includes a second stepless potentiometer, the output terminal of which is connected to the control input terminal of the driving module, and the control terminal of the second stepless potentiometer is used to adjust the resistance values ​​connected to the driving module.

[0006] Furthermore, the driving module includes two linear driving chips; the power control terminals of the two linear driving chips are respectively connected to the output terminals of the stepless color adjustment module; the output terminal of the second stepless potentiometer is respectively connected to the control input terminals of the two linear driving chips.

[0007] Furthermore, the linear drive chip includes a reference voltage pin; the input terminal of the second non-polarized potentiometer is connected to the output terminal of the non-polarized color adjustment module; and the output terminal of the second non-polarized potentiometer is connected to the reference voltage pins of the two linear drive chips respectively.

[0008] Furthermore, at least one of the linear drive chips includes a current control pin; the input terminal of the second non-polarized potentiometer is grounded; and the output terminal of the second non-polarized potentiometer is connected to the current control pin of one of the linear drive chips.

[0009] Furthermore, the stepless color adjustment module also includes a first MOSFET, a first voltage divider resistor, a second MOSFET, and a second voltage divider resistor; the first output terminal of the first stepless potentiometer is connected to the control terminal of the first MOSFET and one end of the first voltage divider resistor, respectively; the input terminal of the first MOSFET is connected to the output terminal of the first LED unit; the second output terminal of the first stepless potentiometer is connected to the control terminal of the second MOSFET and one end of the second voltage divider resistor, respectively; the input terminal of the second MOSFET is connected to the output terminal of the second LED unit; the output terminal of the first MOSFET, the other end of the first voltage divider resistor, the output terminal of the second MOSFET, and the other end of the second voltage divider resistor are respectively connected to the power control terminal of the driving module.

[0010] Furthermore, it also includes a rectifier and filter unit; the input terminal of the rectifier and filter unit is used to connect to a power supply; the output terminal of the rectifier and filter unit is connected to the input terminal of the stepless color adjustment module.

[0011] Furthermore, it also includes an overcurrent protection unit; one end of the overcurrent protection unit is used to connect to the live wire, and the other end of the overcurrent protection unit is connected to the live wire input terminal of the rectifier filter unit.

[0012] Furthermore, it also includes an overvoltage protection unit; one end of the overvoltage protection unit is connected to the other end of the overcurrent protection unit and the live wire input terminal of the rectifier filter unit; the other end of the overvoltage protection unit is used to connect to the neutral wire input terminal of the rectifier filter unit.

[0013] Furthermore, an LED filtering unit is also provided; the input terminal of the LED filtering unit is connected to the input terminal of the stepless color adjustment module; the output terminal of the LED filtering unit is connected to the output terminal of the stepless color adjustment module and the power control terminal of the driving module, respectively.

[0014] Furthermore, the first and second non-polarized potentiometers include sliding potentiometers or rotary potentiometers.

[0015] The beneficial effects of this utility model are as follows: By setting a first stepless potentiometer, a first LED unit and a second LED unit with different color temperatures as a stepless color adjustment module, the first stepless potentiometer is used to allocate the resistance values ​​connected to the first LED unit and the second LED unit. Based on the different resistance value ratios, the voltage and current ratios of the first LED unit and the second LED unit are achieved, so that the first LED unit and the second LED unit form different color temperature ratios, thereby realizing stepless color adjustment; at the same time, the stepless dimming module is connected to the control input terminal of the drive module, and the resistance value connected to the drive module is adjusted using the second stepless potentiometer. Since the current output by the drive module follows the change of the resistance value, the drive module outputs a changing current by adjusting the connected resistance value, thereby realizing stepless dimming. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first circuit module of a stepless dimming and color-tuning drive circuit in this utility model.

[0017] Figure 2 This is a schematic diagram of the first circuit structure connection of a stepless dimming and color-tuning drive circuit in this utility model.

[0018] Figure 3 This is a schematic diagram of a second circuit module of a stepless dimming and color-tuning drive circuit in this utility model.

[0019] Figure 4 This is a schematic diagram of the second circuit structure connection of a stepless dimming and color-tuning drive circuit in this utility model.

[0020] Figure 5 This is a schematic diagram showing the connection of the rectifier filter unit, current protection unit, and overvoltage protection unit in a stepless dimming and color-tuning drive circuit of this utility model.

[0021] Figure 6 This is an enlarged connection diagram of the first circuit structure of a stepless dimming and color-tuning driving circuit in this utility model.

[0022] Figure 7 This is an enlarged connection diagram of the second circuit structure of a stepless dimming and color-tuning drive circuit in this utility model.

[0023] Label Explanation:

[0024] 1. Stepless color adjustment module; 2. Stepless dimming module; 3. Driver module; 4. Rectifier and filter unit; 5. Overcurrent protection unit; 6. Overvoltage protection unit; 7. LED filter unit;

[0025] RP1, First non-polarized potentiometer; D1, First LED unit; D2, Second LED unit; RP2, Second non-polarized potentiometer; IC1 / IC2, Driver chip; Q1, First MOSFET; R13, First voltage divider resistor; Q2, Second MOSFET; R14, Second voltage divider resistor; F1, Fuse; RV, Varistor; BR, Bridge rectifier; E, Electrolytic capacitor. Detailed Implementation

[0026] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0027] A stepless dimming and color-tuning driving circuit includes a stepless color-tuning module, a stepless dimming module, and a driving module. The input terminal of the stepless color-tuning module is connected to a power supply, and the output terminal of the stepless color-tuning module is connected to the power control terminal of the driving module. The stepless color-tuning module includes a first stepless potentiometer and a first LED unit and a second LED unit with different color temperatures. The input terminal of the first stepless potentiometer is connected to a power supply, the first output terminal of the first stepless potentiometer is connected to the first LED unit, the second output terminal of the first stepless potentiometer is connected to the second LED unit, and the control terminal of the first stepless potentiometer is used to allocate the resistance values ​​connected to the first LED unit and the second LED unit. The stepless dimming module includes a second stepless potentiometer, the output terminal of which is connected to the control input terminal of the driving module, and the control terminal of the second stepless potentiometer is used to adjust the resistance values ​​connected to the driving module.

[0028] As described above, the beneficial effects of this utility model are as follows: By setting a first stepless potentiometer, a first LED unit with a color temperature, and a second LED unit as a stepless color adjustment module, the first stepless potentiometer is used to allocate the resistance values ​​connected to the first LED unit and the second LED unit. Based on the different resistance value ratios, the voltage and current ratios of the first LED unit and the second LED unit are achieved, so that the first LED unit and the second LED unit form different color temperature ratios, thereby realizing stepless color adjustment; at the same time, the stepless dimming module is connected to the control input terminal of the driving module, and the resistance value connected to the driving module is adjusted using the second stepless potentiometer. Since the current output by the driving module follows the change of the resistance value, the driving module outputs a changing current by adjusting the connected resistance value, thereby realizing stepless dimming.

[0029] Furthermore, the driving module includes two linear driving chips; the power control terminals of the two linear driving chips are respectively connected to the output terminals of the stepless color adjustment module; the output terminal of the second stepless potentiometer is respectively connected to the control input terminals of the two linear driving chips.

[0030] As described above, a drive module is formed by connecting two linear drive chips in parallel, and the circuit control requirements are met by shunting the current.

[0031] Furthermore, the linear drive chip includes a reference voltage pin; the input terminal of the second non-polarized potentiometer is connected to the output terminal of the non-polarized color adjustment module; and the output terminal of the second non-polarized potentiometer is connected to the reference voltage pins of the two linear drive chips respectively.

[0032] As described above, when the reference voltage pin of the linear drive chip is used as the control input terminal, by connecting the output terminal of the second non-polar potentiometer to the reference voltage pin of the linear drive chip, the reference voltage in the linear drive chip is changed based on the different resistance values ​​connected, thereby changing the output current of the entire linear drive chip, thus realizing the dimming function.

[0033] Furthermore, at least one of the linear drive chips includes a current control pin; the input terminal of the second non-polarized potentiometer is grounded; and the output terminal of the second non-polarized potentiometer is connected to the current control pin of one of the linear drive chips.

[0034] As described above, when the current control pin of the linear drive chip is used as the control input, by connecting the output of the second non-polar potentiometer to the current control pin of the linear drive chip, different reference resistor values ​​can be connected to the current control pin of the linear drive chip. Thus, the linear drive chip outputs different current values ​​according to different input reference resistor values, thereby realizing the dimming function.

[0035] Furthermore, the stepless color adjustment module also includes a first MOSFET, a first voltage divider resistor, a second MOSFET, and a second voltage divider resistor; the first output terminal of the first stepless potentiometer is connected to the control terminal of the first MOSFET and one end of the first voltage divider resistor, respectively; the input terminal of the first MOSFET is connected to the output terminal of the first LED unit; the second output terminal of the first stepless potentiometer is connected to the control terminal of the second MOSFET and one end of the second voltage divider resistor, respectively; the input terminal of the second MOSFET is connected to the output terminal of the second LED unit; the output terminal of the first MOSFET, the other end of the first voltage divider resistor, the output terminal of the second MOSFET, and the other end of the second voltage divider resistor are respectively connected to the power control terminal of the driving module.

[0036] As described above, by setting a first MOSFET, a first voltage divider resistor, a second MOSFET, and a second voltage divider resistor, and since the resistance value of the first non-polarized potentiometer is fixed, by connecting the resistance value of the first non-polarized potentiometer to the first and second voltage divider resistors in different proportions, different voltage ratios can be generated across the first and second voltage divider resistors, thereby controlling the current ratio of the first and second MOSFETs, and further controlling the current ratio of the first LED unit and the second LED unit, forming different color temperature ratios, thus achieving stepless color adjustment.

[0037] Furthermore, it also includes a rectifier and filter unit; the input terminal of the rectifier and filter unit is used to connect to a power supply; the output terminal of the rectifier and filter unit is connected to the input terminal of the stepless color adjustment module.

[0038] As can be seen from the above description, by setting up a rectifier and filter unit, the input AC power can be effectively rectified into DC power to supply power to the subsequent circuit modules.

[0039] Furthermore, it also includes an overcurrent protection unit; one end of the overcurrent protection unit is used to connect to the live wire, and the other end of the overcurrent protection unit is connected to the live wire input terminal of the rectifier filter unit.

[0040] As described above, by setting up an overcurrent protection unit, when the current in the circuit is too large, the overcurrent protection unit will melt and automatically cut off the power supply, thereby protecting the circuit.

[0041] Furthermore, it also includes an overvoltage protection unit; one end of the overvoltage protection unit is connected to the other end of the overcurrent protection unit and the live wire input terminal of the rectifier filter unit; the other end of the overvoltage protection unit is used to connect to the neutral wire input terminal of the rectifier filter unit.

[0042] As described above, by setting up an overvoltage protection unit, when an abnormal instantaneous overvoltage occurs in the circuit, the overvoltage protection unit will change from a high-resistance state to a low-resistance state, clamping the abnormal instantaneous voltage to a safe level, thereby protecting the downstream circuit.

[0043] Furthermore, an LED filtering unit is also provided; the input terminal of the LED filtering unit is connected to the input terminal of the stepless color adjustment module; the output terminal of the LED filtering unit is connected to the output terminal of the stepless color adjustment module and the power control terminal of the driving module, respectively.

[0044] As described above, by setting up an LED filter unit, the input DC can be filtered to obtain a low-ripple output.

[0045] Furthermore, the first and second non-polarized potentiometers include sliding potentiometers or rotary potentiometers.

[0046] As described above, by using a sliding potentiometer or a knob potentiometer as the first and second stepless potentiometers, the resistance value can be adjusted by sliding or rotating, thereby achieving stepless dimming and stepless color adjustment.

[0047] The stepless dimming and color-adjusting drive circuit provided by this utility model can be applied to lighting scenarios to achieve stepless dimming and color-adjusting. The following is a detailed description of the implementation method:

[0048] Example 1

[0049] Please refer to Figures 1 to 4 A stepless dimming and color-tuning driving circuit includes a stepless color-tuning module 1, a stepless dimming module 2, and a driving module 3. The input terminal of the stepless color-tuning module 1 is connected to a power supply, and the output terminal of the stepless color-tuning module 1 is connected to the power control terminal of the driving module 3. The stepless color-tuning module 1 includes a first stepless potentiometer RP1 and a first LED unit D1 and a second LED unit D2 with different color temperatures. For example, the first LED unit D1 has a color temperature of 2700K, and the second LED unit D2 has a color temperature of 5000K. Different color temperature LED light sources can be selected according to actual needs. The first stepless potentiometer... The input terminal of RP1 is used to connect to a power supply. The first output terminal of the first non-polarized potentiometer RP1 is connected to the first LED unit D1, and the second output terminal of the first non-polarized potentiometer RP1 is connected to the second LED unit D2. The control terminal of the first non-polarized potentiometer RP1 is used to allocate the resistance values ​​connected to the first LED unit D1 and the second LED unit D2. The non-polarized dimming module 2 includes a second non-polarized potentiometer RP2. The output terminal of the second non-polarized potentiometer RP2 is connected to the control input terminal of the drive module 3, and the control terminal of the second non-polarized potentiometer RP2 is used to adjust the resistance value connected to the drive module 3. The first non-polarized potentiometer RP1 and the second non-polarized potentiometer RP2 can be either sliding potentiometers or rotary potentiometers.

[0050] Please refer to Figure 5 The stepless dimming and color-tuning drive circuit also includes a rectifier filter unit 4, a current protection unit, an overvoltage protection unit 6, and an LED filter unit 7.

[0051] The input terminal of the rectifier and filter unit 4 is used to connect to the power supply; the output terminal of the rectifier and filter unit 4 is connected to the input terminal of the stepless color adjustment module 1. For example, in this embodiment, the rectifier and filter unit 4 implements the rectification function through a bridge rectifier BR, which is used to rectify the AC power into pulsating DC power.

[0052] One end of the overcurrent protection unit 5 is connected to the live wire, and the other end is connected to the live wire input terminal of the rectifier filter unit 4. For example, the overcurrent protection unit 5 is a fuse F1. The fuse F1 is connected in series with the live wire input terminal of the rectifier filter unit 4 so that when the current in the circuit is too large, the fuse F1 will blow, thereby automatically cutting off the power supply and protecting the circuit.

[0053] One end of the overvoltage protection unit 6 is connected to the other end of the overcurrent protection unit 5 and the live wire input terminal of the rectifier filter unit 4; the other end of the overvoltage protection unit 6 is connected to the neutral wire input terminal of the rectifier filter unit 4. For example, the overvoltage protection unit 6 uses a varistor RV, which is connected in parallel to the input terminal of the rectifier filter unit 4. When the circuit is working normally, the varistor RV is in a high-resistance state and does not affect the normal operation of the circuit. However, when an abnormal transient overvoltage occurs in the circuit, the varistor RV will quickly change from a high-resistance state to a low-resistance state, clamping the abnormal transient voltage to a safe level, thereby protecting the downstream circuit.

[0054] The input terminal of the LED filter unit 7 is connected to the input terminal of the stepless color adjustment module 1; the output terminal of the LED filter unit 7 is connected to the output terminal of the stepless color adjustment module 1 and the power control terminal of the drive module 3 respectively; for example, the LED filter unit 7 uses an electrolytic capacitor E, and a low ripple output is obtained by filtering through the electrolytic capacitor E.

[0055] The drive module 3 includes two linear drive chips (IC1 and IC2); the power control terminals of the two linear drive chips IC1 / IC2 are respectively connected to the output terminals of the stepless color adjustment module 1; the output terminal of the second stepless potentiometer RP2 is respectively connected to the control input terminals of the two linear drive chips (IC1 and IC2); the entire drive output current is controlled based on the linear drive chips, and is composed of two linear drive chips (IC1 and IC2) connected in parallel, which meets the control requirements by current shunting.

[0056] The specific control methods are as follows:

[0057] Please refer to Figure 2 as well as Figure 6 In an optional implementation, the linear drive chips (IC1 and IC2) include a reference voltage pin (VD); the input of the second non-polarized potentiometer RP2 is connected to the output of the non-polarized color adjustment module 1; the output of the second non-polarized potentiometer RP2 is connected to the reference voltage pins (VD) of the two linear drive chips (IC1 and IC2), respectively. Figure 2As shown, the two linear drive chips (IC1 and IC2) are of the same model. The output terminal of the stepless color adjustment module 1 is connected to the input terminal of the second stepless potentiometer RP2. The second stepless potentiometer RP2 only uses one output terminal. The resistance value of the output terminal can be adjusted by sliding (rotating) the second stepless potentiometer RP2. That is, by sliding (rotating) the second stepless potentiometer RP2, the voltage value of the reference voltage pin (VD) of the linear drive chip can be changed, thereby changing the reference voltage of the linear drive chips (IC1 and IC2). This causes the output current of the entire drive to change according to the position of the second stepless potentiometer RP2, thus realizing the stepless dimming function.

[0058] Please refer to Figure 4 as well as Figure 7 In another alternative implementation, the two linear drive chips (IC1 and IC2) are of different models, wherein at least one linear drive chip IC2 includes a current control pin; the input of the second non-polarized potentiometer RP2 is grounded; and the output of the second non-polarized potentiometer RP2 is connected to the current control pin (REXT) of the linear drive chip IC2. Figure 3 As shown, the output terminal of the second stepless potentiometer RP2 is connected to the current control pin (REXT) of the linear drive chip IC2; by sliding (rotating) the second stepless potentiometer RP2, the resistance on the current control pin (REXT) of the linear drive chip IC2 is changed, so that the output current of the entire drive changes according to the position adjusted by the second stepless potentiometer RP2, thereby realizing the stepless dimming function.

[0059] Please refer to Figure 6 The stepless color adjustment module 1 also includes a first MOSFET Q1, a first voltage divider resistor R13, a second MOSFET Q2, and a second voltage divider resistor R14; the first output terminal of the first stepless potentiometer RP1 is connected to the control electrode of the first MOSFET Q1 and one end of the first voltage divider resistor R13; the input electrode of the first MOSFET Q1 is connected to the output terminal of the first LED unit D1; the second output terminal of the first stepless potentiometer RP1 is connected to the control electrode of the second MOSFET Q2 and one end of the second voltage divider resistor R14; the input electrode of the second MOSFET Q2 is connected to the output terminal of the second LED unit D2; the output electrode of the first MOSFET Q1, the other end of the first voltage divider resistor R13, the output electrode of the second MOSFET Q2, and the other end of the second voltage divider resistor R14 are connected to the power control terminal of the drive module 3.

[0060] The specific working principle of the stepless color adjustment module 1 is as follows:

[0061] Normal AC power is supplied, passing through fuse F1, then rectified by bridge rectifier BR, and filtered by electrolytic capacitor E. Part of the current flows into the first LED unit D1 (2700K color temperature light source), and another part flows into the second LED unit D2 (5000K color temperature light source). A small portion of the current flows through resistor R10 to the first non-polarized potentiometer RP1. The two ends of the first non-polarized potentiometer RP1 are connected in series with the first voltage divider resistor R13 (left side) and the second voltage divider resistor R14 (right side), respectively. The first non-polarized potentiometer RP1 as a whole... The resistance value is fixed, so the total resistance value on the left and the total resistance value on the right are complementary. When the first non-polar potentiometer RP1 moves to the right, the total resistance value on the left will gradually increase, causing the voltage across the first voltage divider resistor R13 to decrease. At this time, the Vgs voltage in the first MOSFET Q1 also decreases, and the current flowing through the first MOSFET Q1 will decrease as the Vgs voltage decreases. When the Vgs voltage is low enough, the first MOSFET Q1 turns off, so the circuit of the first LED unit D1 will gradually turn off because there is no current flowing through it.

[0062] Simultaneously, the total resistance on the right side will gradually decrease, causing the voltage across the second voltage divider resistor R14 to increase. At this time, the Vgs voltage in the second MOSFET Q2 also increases, and the current flowing through the second MOSFET Q2 will increase with the increase in Vgs voltage. Consequently, the current in the second LED unit D2 circuit will gradually increase, and the color temperature of the entire lamp will slowly approach 5000K as the potentiometer is adjusted. Conversely, when the first stepless potentiometer RP1 moves to the left, the color temperature of the entire lamp will slowly approach 2700K, thus achieving stepless color adjustment.

[0063] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A driving circuit for an endless dimming and color-tuning, characterized by, The application relates to a color and brightness adjusting module. The input end of the color and brightness adjusting module is used for connecting a power supply, and the output end of the color and brightness adjusting module is connected with the power supply control end of the driving module. The color and brightness adjusting module comprises a first endless potentiometer and first and second LED units with different color temperatures. The input end of the first endless potentiometer is used for connecting a power supply, the first output end of the first endless potentiometer is connected with the first LED unit, the second output end of the first endless potentiometer is connected with the second LED unit, and the control end of the first endless potentiometer is used for distributing the resistance values connected with the first and second LED units. The color and brightness adjusting module comprises a second endless potentiometer, the output end of the second endless potentiometer is connected with the control input end of the driving module, and the control end of the second endless potentiometer is used for adjusting the resistance value connected with the driving module.

2. The driving circuit according to claim 1, wherein The driving module comprises two linear driving chips. The power supply control ends of the two linear driving chips are respectively connected with the output end of the color and brightness adjusting module. The output end of the second endless potentiometer is respectively connected with the control input end of the two linear driving chips.

3. The driving circuit according to claim 2, wherein the driving circuit is a dimming and color-tuning driving circuit. The linear driving chip comprises a reference voltage pin. The input end of the second endless potentiometer is connected with the output end of the color and brightness adjusting module. The output end of the second endless potentiometer is respectively connected with the reference voltage pin of the two linear driving chips.

4. The driving circuit according to claim 2, wherein At least one linear driving chip comprises a current control pin. The input end of the second endless potentiometer is grounded. The output end of the second endless potentiometer is connected with the current control pin of one linear driving chip.

5. The driving circuit according to claim 1, wherein The color and brightness adjusting module further comprises a first MOS tube, a first voltage dividing resistor, a second MOS tube and a second voltage dividing resistor. The first output end of the first endless potentiometer is respectively connected with the control pole of the first MOS tube and one end of the first voltage dividing resistor; the input pole of the first MOS tube is connected with the output end of the first LED unit. The second output end of the first endless potentiometer is respectively connected with the control pole of the second MOS tube and one end of the second voltage dividing resistor; the input pole of the second MOS tube is connected with the output end of the second LED unit. The output pole of the first MOS tube, the other end of the first voltage dividing resistor, the output pole of the second MOS tube and the other end of the second voltage dividing resistor are respectively connected with the power supply control end of the driving module.

6. The driving circuit according to claim 1, wherein The application further comprises a rectification and filtering unit. The input end of the rectification and filtering unit is used for connecting a power supply. The output end of the rectification and filtering unit is connected with the input end of the color and brightness adjusting module.

7. The driving circuit according to claim 6, wherein the driving circuit is a dimming and toning driving circuit. The application further comprises an overcurrent protection unit. One end of the overcurrent protection unit is used for connecting a live wire, and the other end of the overcurrent protection unit is connected with the live wire input end of the rectification and filtering unit.

8. The driving circuit according to claim 7, wherein the driving circuit is a dimming and toning driving circuit. The application further comprises an overvoltage protection unit. One end of the overvoltage protection unit is respectively connected with the other end of the overcurrent protection unit and the live wire input end of the rectification and filtering unit. The other end of the overvoltage protection unit is used for connecting with the zero line input end of the rectification filter unit.

9. The driving circuit according to claim 1, wherein The LED filter unit is further provided. The input end of the LED filter unit is connected with the input end of the endless color modulation module. The output end of the LED filter unit is respectively connected with the output end of the endless color modulation module and the power control end of the driving module.

10. The driving circuit according to claim 1, wherein The first endless potentiometer and the second endless potentiometer comprise an over-slip potentiometer or a knob potentiometer.

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