CN219740667U

CN219740667U - Solar energy LED umbrella lamp control circuit

Info

Publication number: CN219740667U
Application number: CN202320576374.2U
Authority: CN
Inventors: 胡小丽
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-09-22
Anticipated expiration: 2033-03-22

Abstract

The utility model relates to LED illumination, in particular to a solar LED umbrella lamp control circuit. The utility model aims to provide a solar LED umbrella lamp control circuit which can charge electronic products by utilizing solar energy and has a lighting function. The utility model provides a solar LED umbrella lamp control circuit which comprises an overshoot voltage suppression circuit, a green LED indicator lamp, a current charging management circuit, a red LED indicator lamp and the like, wherein the output end of the overshoot voltage suppression circuit is connected with the input end of the current charging management circuit, the green LED indicator lamp is connected with the output end of the current charging management circuit, and the red LED indicator lamp is connected with the output end of the current charging management circuit. According to the utility model, solar energy can be received through the solar panel, the solar energy is converted into electric energy to be stored in the lithium battery, and the power can be supplied to the LED module at night, so that the LED module emits light to provide illumination for people, and energy is saved.

Description

Solar energy LED umbrella lamp control circuit

Technical Field

The utility model relates to LED illumination, in particular to a solar LED umbrella lamp control circuit.

Background

In hot summer, people usually use sunshade to sunshade when going out, and when solar energy is not utilized, a large amount of energy is wasted.

And along with the development of society, electronic product uses more and more extensively, people often can use the treasured that charges to charge to electronic product when outdoor, but people hold the sun shade, inconvenient take treasured that charges, and in addition, when night, light is darker, people need hold the illumination instrument and throw light on, comparatively inconvenient, current sun shade generally does not have the function of charging and illumination, inconvenient people's use, to above-mentioned problem, has designed a solar energy LED umbrella lamp control circuit that can utilize solar energy to charge to electronic product and possess the illumination function.

Disclosure of Invention

In order to overcome the defect that the existing sunshade generally has no charging and lighting functions and is inconvenient for people to use, the utility model aims to provide a solar LED umbrella lamp control circuit which can charge electronic products by utilizing solar energy and has the lighting function.

The utility model is realized by the following technical approaches:

the solar LED umbrella lamp control circuit comprises an overshoot voltage suppression circuit, a solar panel, a key switch, a green LED indicator lamp, an LED working indicator lamp, a lithium battery, an electronic switch circuit, a current modulation integrated circuit, a current charging management circuit, an LED current setting circuit, a battery voltage detection circuit, a red LED indicator lamp, a constant current charging current setting and charging current detection circuit and an LED module, wherein the output end of the overshoot voltage suppression circuit is connected with the input end of the current charging management circuit, the green LED indicator lamp is connected with the output end of the current charging management circuit, the red LED indicator lamp is connected with the output end of the current charging management circuit, the output end of the battery voltage detection circuit is connected with the input end of the current charging management circuit, the output end of the constant current charging current setting and charging current detection circuit is connected with the input end of the current charging management circuit, the key switch is connected with the input end of the electronic switch circuit, the LED working indicator lamp is connected with the output end of the electronic switch circuit, the output end of the LED working indicator lamp is connected with the input end of the current modulation integrated circuit, the output end of the LED charging management circuit is connected with the LED current setting integrated circuit, the output end of the LED current setting integrated circuit, the LED lamp is connected with the LED current setting integrated circuit, the LED current setting and the current charging management circuit is provided by the current setting integrated circuit, the LED current setting and the green LED lamp is provided by the current, the LED current setting and the current is provided by the current management circuit, the solar panel provides electric energy for the lithium battery.

Preferably, the lithium battery is used for supplying power to the LED charge and discharge indicator lamp, the USB, the multifunctional power management SOC and the starting switch.

Preferably, the overshoot voltage suppression circuit includes a diode D2 and a capacitor C2, one end of the solar panel is grounded, the other end of the solar panel is connected with an anode of the diode D2, a cathode of the diode D2 is connected with the capacitor C2 in series, and the other end of the capacitor C2 is grounded.

Preferably, the current charge management circuit comprises a battery charge management chip CN3163-U1 and a resistor R3, wherein the 3 pin of the battery charge management chip CN3163-U1 is grounded, and the 4 pin of the battery charge management chip CN3163-U1 is connected with the resistor R3 in series.

Preferably, the constant current charging current setting and charging current detecting circuit is a resistor R1, a 2-pin serial resistor R1 of the battery charging management chip CN3163-U1, and the other end of the resistor R1 is grounded.

Preferably, the green LED indicator lamp and the red LED indicator lamp comprise light emitting diodes VD 1-VD 2, the other end of the resistor R3 is connected with an anode of the light emitting diode VD1 in series, a cathode of the light emitting diode VD1 is connected with 6 pins of the battery charging management chip CN3163-U1, the other end of the resistor R3 is connected with an anode of the light emitting diode VD2 in series, and the cathode of the light emitting diode VD2 is connected with 7 pins of the battery charging management chip CN 3163-U1.

Preferably, the battery voltage detection circuit includes a resistor R2, a resistor R4-R5, a battery BT1, a capacitor C1, a diode D1 and a thermistor RT1, where the 4 pins of the battery charging management chip CN3163-U1 are connected in series with the resistor R4 and the resistor R5, the other end of the resistor R5 is grounded, the 1 pin of the battery charging management chip CN3163-U1 is connected to a node between the resistor R4 and the resistor R5, the 1 pin of the battery charging management chip CN3163-U1 is connected in series with the thermistor RT1, the other end of the thermistor RT1 is connected to the negative electrode of the battery BT1, the negative electrode of the battery BT1 is grounded, the positive electrode of the battery BT1 is connected in series with the capacitor C1, the other end of the capacitor C1 is grounded, the 5 pin of the battery charging management chip CN3163-U1 is connected to the positive electrode of the battery BT1, the negative electrode of the 5 pin of the battery charging management chip CN3163-U1 is connected in series with the positive electrode of the diode D1, the negative electrode of the diode D1 is connected to the negative electrode of the battery charging management chip CN3163-U1, and the other end of the battery charging management chip CN 2 is connected to the negative electrode of the resistor R2.

Preferably, the current modulation integrated circuit is a current modulation chip CN5711-U2, the 2 pins of the current modulation chip CN5711-U2 are grounded, the 3 pins of the current modulation chip CN5711-U2 are connected with the 4 pins thereof, the 3 pins of the current modulation chip CN5711-U2 are connected with VCC2, the 5 pins of the current modulation chip CN5711-U2 are connected with the 6 pins thereof, and the 8 pins of the current modulation chip CN5711-U2 are connected with VCC2.

Preferably, the LED current setting circuit is a resistor R6, the 1 pins of the current modulation chips CN5711-U2 are connected in series with the resistor R6, and the other end of the resistor R6 is grounded.

Preferably, the LED module comprises light emitting diodes VD 3-VD 7, the light emitting diodes VD 3-VD 7 are connected in parallel, the anodes after being connected in parallel are connected with the 5 pins of the current modulation chips CN5711-U2, and the cathodes after being connected in parallel are grounded.

Compared with the prior art, the utility model has the remarkable advantages that:

1. according to the utility model, solar energy can be received through the solar panel, the solar energy is converted into electric energy to be stored in the lithium battery, and the power can be supplied to the LED module at night, so that the LED module emits light to provide illumination for people, and energy is saved.

2. According to the utility model, the lithium battery is used for supplying power, so that the USB can be electrified, and people can charge other electronic products conveniently.

Drawings

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is a schematic circuit diagram of the present utility model.

Reference numerals: the LED charging and discharging display lamp comprises a 1_LED charging and discharging display lamp, a 2_overshoot voltage suppression circuit, a 3_solar panel, a 4_key switch, a 5_green light LED display lamp, a 6_LED working display lamp, a 7_lithium battery, an 8_electronic switch circuit, a 9_current modulation integrated circuit, a 10_current charging management circuit, a 11_LED current setting circuit, a 12_battery voltage detection circuit, a 13_red light LED display lamp, a 14_constant current charging current setting and charging current detection circuit, a 15_USB, a 16_multifunctional power management SOC, a 17_LED module and a 18_starting switch.

Detailed Description

The utility model is further elucidated below in connection with the drawings of the description, and embodiments of the utility model are given in connection with the drawings of the description.

Example 1

A solar LED umbrella lamp control circuit is shown in figure 1, which comprises an overshoot voltage suppression circuit 2, a solar panel 3, a key switch 4, a green LED indicator lamp 5, an LED work indicator lamp 6, a lithium battery 7, an electronic switch circuit 8, a current modulation integrated circuit 9, a current charging management circuit 10, an LED current setting circuit 11, a battery voltage detection circuit 12, a red LED indicator lamp 13, a constant current charging current setting and charging current detection circuit 14 and an LED module 17, wherein the output end of the overshoot voltage suppression circuit 2 is connected with the input end of the current charging management circuit 10, the green LED indicator lamp 5 is connected with the output end of the current charging management circuit 10, the red LED indicator lamp 13 is connected with the output end of the current charging management circuit 10, the output end of the battery voltage detection circuit 12 is connected with the input end of the current charging management circuit 10, the output end of the constant current charging current setting and charging current detecting circuit 14 is connected with the input end of the current charging management circuit 10, the key switch 4 is connected with the input end of the electronic switch circuit 8, the LED work indicator lamp 6 is connected with the output end of the electronic switch circuit 8, the output end of the electronic switch circuit 8 is connected with the input end of the current modulation integrated circuit 9, the output end of the LED current setting circuit 11 is connected with the input end of the current modulation integrated circuit 9, the output end of the current modulation integrated circuit 9 is connected with the LED module 17, the lithium battery 7 is an overshoot voltage suppression circuit 2, the key switch 4, the green light LED indicator lamp 5, the LED work indicator lamp 6, the electronic switch circuit 8, the current modulation integrated circuit 9, the current charging management circuit 10, the LED current setting circuit 11 and the battery voltage detecting circuit 12, the red LED indicator lamp 13, the constant-current charging current setting and charging current detecting circuit 14 and the LED module 17 are powered, and the solar panel 3 provides electric energy for the lithium battery 7.

When people use the sunshade umbrella to sunshade, the solar panel 3 can receive solar energy and convert the solar energy into electric energy, then the lithium battery 7 is charged through the current charging management circuit 10, the overshoot voltage suppression circuit 2 can perform overvoltage protection on the current charging management circuit 10 to avoid damage to the current charging management circuit 10 caused by overlarge instantaneous voltage, at the moment, the current charging management circuit 10 controls the red LED indicator lamp 13 to be lightened, the battery voltage detection circuit 12 can detect and protect the voltage of the lithium battery 7, the constant-current charging current setting and charging current detection circuit 14 can set and protect the charging and discharging current of the current charging management circuit 10, the current charging management circuit 10 controls the red LED indicator lamp 13 to be extinguished after the lithium battery 7 is fully charged, the current charging management circuit 10 controls the green LED indicator lamp 5 to be lightened, the current charging management circuit 10 stops charging the lithium battery 7, if the red LED indicator lamp 13 and the green LED indicator lamp 5 are not on, the solar LED umbrella lamp control circuit is likely to be in fault, when the night arrives, people can press the key switch 4 once, the key switch 4 sends out a signal, the electronic switch circuit 8 receives the signal and then controls the LED operation indicator lamp 6 to be on, so that the electronic switch circuit 8 is started to work, meanwhile, the electronic switch circuit 8 controls the current modulation integrated circuit 9 to start working, the current modulation integrated circuit 9 controls the LED module 17 to start working, the LED module 17 can emit light to illuminate for people, the current of the LED module 17 can be set through the LED current setting circuit 11, when the people presses the key switch 4 once again, the key switch 4 sends out a signal, the electronic switch circuit 8 receives the signal and then controls the LED work indicator lamp 6 to be turned off, so that the electronic switch circuit 8 stops working, meanwhile, the electronic switch circuit 8 controls the current modulation integrated circuit 9 to stop working, and the current modulation integrated circuit 9 controls the LED module 17 to stop working.

Example 2

On the basis of embodiment 1, as shown in fig. 1, the lithium battery 7 supplies power to the LED charge and discharge indicator lamp 1, the USB 15, the multifunctional power management SOC 16 and the start switch 18, wherein the LED charge and discharge indicator lamp 1 is connected with the output end of the multifunctional power management SOC 16, the USB 15 is connected with the output end of the multifunctional power management SOC 16, the start switch 18 is connected with the input end of the multifunctional power management SOC 16.

When people need to charge other electronic equipment, the start switch 18 can be pressed once, the start switch 18 sends out signals, the multifunctional power management SOC 16 controls the USB 15 to be electrified after receiving the signals, at the moment, people can charge other electronic equipment through the USB 15, meanwhile, the multifunctional power management SOC 16 controls the LED charge and discharge indicator lamp 1 to start working, the LED charge and discharge indicator lamp 1 can display the current electric quantity, when people do not need to charge other electronic equipment, the start switch 18 is pressed once again, the start switch 18 sends out signals, the multifunctional power management SOC 16 controls the USB 15 to be powered off after receiving the signals, and meanwhile, the multifunctional power management SOC 16 controls the LED charge and discharge indicator lamp 1 to stop working.

Example 3

As shown in FIG. 2, the overshoot voltage suppression circuit 2 comprises a diode D2 and a capacitor C2, one end of the solar panel 3 is grounded, the other end of the solar panel 3 is connected with the anode of the diode D2, the cathode of the diode D2 is connected with the capacitor C2 in series, and the other end of the capacitor C2 is grounded.

The current charge management circuit 10 includes a battery charge management chip CN3163-U1 and a resistor R3, wherein the 3 pin of the battery charge management chip CN3163-U1 is grounded, and the 4 pins of the battery charge management chip CN3163-U1 are connected in series with the resistor R3.

The constant current charging current setting and charging current detecting circuit 14 is a resistor R1, the 2 pins of the battery charging management chip CN3163-U1 are connected in series with the resistor R1, and the other end of the resistor R1 is grounded.

The green light LED indicator lamp 5 and the red light LED indicator lamp 13 comprise light emitting diodes VD 1-VD 2, the other end of the resistor R3 is connected with an anode of the light emitting diode VD1 in series, a cathode of the light emitting diode VD1 is connected with 6 pins of the battery charging management chip CN3163-U1, the other end of the resistor R3 is connected with an anode of the light emitting diode VD2 in series, and the cathode of the light emitting diode VD2 is connected with 7 pins of the battery charging management chip CN 3163-U1.

The battery voltage detection circuit 12 includes a resistor R2, resistors R4-R5, a battery BT1, a capacitor C1, a diode D1 and a thermistor RT1, where the 4 pins of the battery charge management chip CN3163-U1 are connected in series with the resistor R4 and the resistor R5, the other end of the resistor R5 is grounded, the 1 pin of the battery charge management chip CN3163-U1 is connected with a node between the resistor R4 and the resistor R5, the 1 pin of the battery charge management chip CN3163-U1 is connected in series with the thermistor RT1, the other end of the thermistor RT1 is connected with the negative electrode of the battery BT1, the negative electrode of the battery BT1 is grounded, the positive electrode of the battery BT1 is connected with the capacitor C1, the other end of the capacitor C1 is grounded, the 5 pin of the battery charge management chip CN3163-U1 is connected with the positive electrode of the diode D1, the negative electrode of the diode D1 is connected with the negative electrode of the battery charge management chip CN3163-U1, and the other end of the battery charge management chip CN3163-U1 is connected with the positive electrode of the resistor R2.

The current modulation integrated circuit 9 is a current modulation chip CN5711-U2, the 2 pins of the current modulation chip CN5711-U2 are grounded, the 3 pins of the current modulation chip CN5711-U2 are connected with the 4 pins thereof, the 3 pins of the current modulation chip CN5711-U2 are connected with VCC2, the 5 pins of the current modulation chip CN5711-U2 are connected with the 6 pins thereof, and the 8 pins of the current modulation chip CN5711-U2 are connected with VCC2.

The LED current setting circuit 11 is a resistor R6, the 1 pins of the current modulation chips CN5711-U2 are connected in series with the resistor R6, and the other end of the resistor R6 is grounded.

The LED module 17 comprises light emitting diodes VD 3-VD 7, the light emitting diodes VD 3-VD 7 are connected in parallel, anodes after parallel connection are connected with 5 pins of the current modulation chips CN5711-U2, and cathodes after parallel connection are grounded.

When people use the sunshade umbrella to sunshade, the solar panel 3 can receive solar energy and convert the solar energy into electric energy, then the battery BT1 is charged through the battery charge management chip CN3163-U1, the diode D2 can carry out overvoltage protection on the battery charge management chip CN3163-U1, the damage to the battery charge management chip CN3163-U1 caused by overlarge instantaneous voltage is avoided, at the moment, the 6 feet of the battery charge management chip CN3163-U1 output low level, the light emitting diode VD1 emits red light, the resistors R4-R5 and the thermistor RT1 can detect and protect the voltage of the BT1, the resistor R1 can set and protect the charge and discharge current of the battery charge management chip CN3163-U1, and the current I _ch =1188V÷R1，R1<1%2 x 100000 XC, after battery BT1 is fully charged, battery charge management chip CN 3163-U1's 6 feet output high level, light emitting diode VD1 goes out, battery charge management chip CN 3163-U1's 7 feet output low level, light emitting diode VD2 sends green light, battery charge management chip CN3163-U1 stops charging battery BT1, when light emitting diodes VD1~ VD2 go out, it is possible that this solar LED umbrella lamp control circuit breaks down, when people need to charge for other electronic equipment, can press once start switch 18, start switch 18 sends out the signal, multifunctional power management SOC 16 receives the signal and controls USB 15 to switch on, at this moment, people can charge for other electronic equipment through USB 15, multifunctional power management SO simultaneouslyC16 controls LED charge-discharge indicator lamp 1 to start working, LED charge-discharge indicator lamp 1 can display the current electric quantity, when people do not need to charge other electronic equipment, start switch 18 is pressed once again, start switch 18 sends out signals, multifunctional power management SOC 16 controls USB 15 to be powered off after receiving signals, meanwhile multifunctional power management SOC 16 controls LED charge-discharge indicator lamp 1 to stop working, when night arrives, people can press key switch 4 once, key switch 4 sends out signals, current modulation chip CN5711-U2 receives signals, 5 feet of current modulation chip CN5711-U2 output high level, so that light emitting diodes VD 3-VD 7 are lightened, and therefore people can set working currents of light emitting diodes VD 3-VD 7 through resistor R6, working current I _led When the key switch 4 is pressed once again by a person, the key switch 4 sends out a signal, and after the electronic switch circuit 8 receives the signal, the 5 pins of the current modulation chips CN5711-U2 output low level, so that the light emitting diodes VD 3-VD 7 are extinguished.

Finally, it is necessary to state that: the foregoing is provided to assist in understanding the technical solutions of the present utility model, and is not to be construed as limiting the scope of protection of the present utility model; insubstantial modifications and variations from the above teachings are within the scope of the utility model as claimed.

Claims

1. The solar LED umbrella lamp control circuit is characterized by comprising an overshoot voltage suppression circuit (2), a solar panel (3), a key switch (4), a green LED indicator lamp (5), an LED work indicator lamp (6), a lithium battery (7), an electronic switch circuit (8), a current modulation integrated circuit (9), a current charging management circuit (10), an LED current setting circuit (11), a battery voltage detection circuit (12), a red LED indicator lamp (13), a constant current charging current setting and charging current detection circuit (14) and an LED module (17), wherein the output end of the overshoot voltage suppression circuit (2) is connected with the input end of the current charging management circuit (10), the green LED indicator lamp (5) is connected with the output end of the current charging management circuit (10), the output end of the battery voltage detection circuit (12) is connected with the input end of the current charging management circuit (10), the output end of the constant current charging current setting and charging current detection circuit (14) is connected with the input end of the key switch (6), the output end of the red LED indicator lamp (13) is connected with the output end of the electronic switch (8), the LED power supply is characterized in that the output end of the electronic switch circuit (8) is connected with the input end of the current modulation integrated circuit (9), the output end of the LED current setting circuit (11) is connected with the input end of the current modulation integrated circuit (9), the output end of the current modulation integrated circuit (9) is connected with the LED module (17), the lithium battery (7) is an overshoot voltage suppression circuit (2), a key switch (4), a green light LED indicator lamp (5), an LED working indicator lamp (6), the electronic switch circuit (8), the current modulation integrated circuit (9), a current charging management circuit (10), an LED current setting circuit (11), a battery voltage detection circuit (12), a red light LED indicator lamp (13), a constant current charging current setting and charging current detection circuit (14) and the LED module (17) are powered, and the solar panel (3) provides electric energy for the lithium battery (7).

2. The solar LED umbrella lamp control circuit according to claim 1, further comprising an LED charge and discharge indicator lamp (1), a USB (15), a multifunctional power management SOC (16) and a starting switch (18), wherein the LED charge and discharge indicator lamp (1) is connected with the output end of the multifunctional power management SOC (16), the USB (15) is connected with the output end of the multifunctional power management SOC (16), the starting switch (18) is connected with the input end of the multifunctional power management SOC (16), and the lithium battery (7) is used for supplying power to the LED charge and discharge indicator lamp (1), the USB (15), the multifunctional power management SOC (16) and the starting switch (18).

3. The solar energy LED umbrella lamp control circuit according to claim 2, wherein the overshoot voltage suppression circuit (2) comprises a diode D2 and a capacitor C2, one end of the solar panel (3) is grounded, the other end of the solar panel (3) is connected with an anode of the diode D2, a cathode of the diode D2 is connected with the capacitor C2 in series, and the other end of the capacitor C2 is grounded.

4. A solar LED umbrella lamp control circuit as defined in claim 3, wherein the current charging management circuit (10) comprises a battery charging management chip CN3163-U1 and a resistor R3, the 3 pin of the battery charging management chip CN3163-U1 is grounded, and the 4 pin of the battery charging management chip CN3163-U1 is connected in series with the resistor R3.

5. The solar energy LED umbrella lamp control circuit according to claim 4, wherein the constant current charging current setting and charging current detecting circuit (14) is a resistor R1, the 2 pins of the battery charging management chip CN3163-U1 are connected in series with the resistor R1, and the other end of the resistor R1 is grounded.

6. The solar energy LED umbrella lamp control circuit according to claim 5, wherein the green light LED indicator lamp (5) and the red light LED indicator lamp (13) comprise light emitting diodes VD 1-VD 2, the other end of the resistor R3 is connected with an anode of the light emitting diode VD1 in series, a cathode of the light emitting diode VD1 is connected with a 6 pin of the battery charging management chip CN3163-U1, the other end of the resistor R3 is connected with an anode of the light emitting diode VD2 in series, and the cathode of the light emitting diode VD2 is connected with a 7 pin of the battery charging management chip CN 3163-U1.

7. The solar LED umbrella lamp control circuit according to claim 6, wherein the battery voltage detection circuit (12) comprises a resistor R2, resistors R4-R5, a battery BT1, a capacitor C1, a diode D1 and a thermistor RT1, the 4-pin series resistor R4 and the resistor R5 of the battery charge management chip CN3163-U1, the other end of the resistor R5 is grounded, the 1-pin of the battery charge management chip CN3163-U1 is connected to a node between the resistor R4 and the resistor R5, the 1-pin series thermistor RT1 of the battery charge management chip CN3163-U1, the other end of the thermistor RT1 is connected to the negative electrode of the battery BT1, the negative electrode of the battery BT1 is grounded, the 5-pin of the battery charge management chip CN3163-U1 is connected to the positive electrode of the battery BT1, the positive electrode of the diode D1 is connected to the negative electrode of the battery BT1, and the other end of the battery charge management chip CN3163-U1 is connected to the negative electrode of the positive electrode of the battery BT1 is connected to the negative electrode of the battery BT 1.

8. The solar energy LED umbrella lamp control circuit of claim 7, wherein the current modulation integrated circuit (9) is a current modulation chip CN5711-U2, pin 2 of the current modulation chip CN5711-U2 is grounded, pin 3 of the current modulation chip CN5711-U2 is connected with pin 4 thereof, pin 3 of the current modulation chip CN5711-U2 is connected with pin VCC2, pin 5 of the current modulation chip CN5711-U2 is connected with pin 6 thereof, and pin 8 of the current modulation chip CN5711-U2 is connected with pin VCC2.

9. The solar energy LED umbrella lamp control circuit according to claim 8, wherein the LED current setting circuit (11) is a resistor R6, the 1 pins of the current modulation chips CN5711-U2 are connected in series with the resistor R6, and the other end of the resistor R6 is grounded.

10. The solar LED umbrella lamp control circuit according to claim 9, wherein the LED module (17) comprises light emitting diodes VD 3-VD 7, the light emitting diodes VD 3-VD 7 are connected in parallel, the anode after being connected in parallel is connected with the 5 pins of the current modulation chips CN5711-U2, and the cathode after being connected in parallel is grounded.