Light-controlled animated LED vehicle lamp module with manual / automatic mode switching function

Abstract

A light-controlled animated LED vehicle lamp module with a manual / automatic mode switching function. The light-controlled animated LED vehicle lamp module comprises a power source module, a main circuit, an MCU module, a light sensing module, a first control module, a constant-current IC module, an LED lamp group module, a second control module, a high-low beam switching module and a counting detection module. The light-controlled LED vehicle lamp module selects a photosensitive diode as a photosensitive element, and also selects a high-frequency pulse width signal to control the LED lamp group module to emit light, thereby overcoming the problem of interference with the photosensitive element when the LED lamp group module emits light, and achieving a high degree of integration of the light-controlled LED vehicle lamp module. In addition, by means of a built-in program of the MCU module, a manual / automatic mode switching function and a lamplight animation function can be enabled. A single vehicle lamp module can meet the actual requirements of consumers from different groups, thereby saving on the manufacturing costs of manufacturers.

Description

A light-controlled animation LED car lamp module with hand / automatic mode switching function TECHNICAL FIELD

[0001] The present application relates to the technical field of headlamp modules for electric vehicles, in particular to a light-controlled animation LED car lamp module with hand / automatic mode switching function. BACKGROUND

[0002] Electric motorcycles and electric bicycles play an important role in people's daily travel. With the development of technology, automatic headlights are no longer limited to use on cars, but are also more commonly used on electric motorcycles or electric bicycles, providing customers with a better product experience. In the structure of a traditional automatic headlamp module for electric motorcycles, a photosensitive resistor, a triode, and a relay are included. The photosensitive resistor senses changes in the external environment, and then the triode controls the switching of the relay to automatically turn on and off the light-emitting diodes in the module. In the traditional automatic headlamp module, the photosensitive resistor needs to be installed to avoid the light range of the light-emitting diode to prevent the light-emitting diode from interfering with the photosensitive resistor. This results in the photosensitive resistor being externally set on the automatic headlamp module, making the overall installation of the automatic headlamp module more inconvenient. When considering integrating the photosensitive resistor into the automatic headlamp module, the problem of how to avoid the light-emitting diode must be solved. In addition, the existing automatic headlamp module for electric motorcycles generally does not have a hand / automatic mode switching function, the product function is relatively single, there is no animation headlight effect, and it cannot meet the actual needs of different customers.

[0003] SUMMARY

[0004] To solve the above problems, the present application provides a light-controlled animation LED car lamp module with hand / automatic mode switching function.

[0005] To achieve the above purpose, the present application provides a light-controlled animation LED car lamp module with hand / automatic mode switching function, which comprises a power module and a main circuit. The power module is input to the main circuit through a position lamp input end WZDIN. An MCU module is connected to the main circuit through a voltage reduction circuit. The MCU module outputs a high-frequency pulse width signal through a 6-pin.

[0006] A light sensing module comprises a photosensitive diode D1 and a series resistor R1. The photosensitive diode D1 is connected to the MCU module to monitor changes in ambient light and input monitoring signals from a 4-pin to the MCU module in real time. At the same time, the MCU module outputs a 5-pin light control signal according to the monitoring signal of the 4-pin.

[0007] The first control module comprises a MOS tube Q1 arranged on the main circuit to realize on-off control, and is connected with the main circuit. Meanwhile, the first control module is connected with the 5th pin of the MCU module to receive the signal output by the 5th pin of the MCU module.

[0008] The constant current IC module is connected with the main circuit.

[0009] The LED lamp group module is connected with the main circuit and the constant current IC module, and comprises serially connected LED1, LED2 and LED3. The LED1 is used as a low beam, and the LED2 and the LED3 are used as a high beam.

[0010] The second control module comprises a MOS tube Q5 arranged on the LED lamp group module to realize on-off control of the circuit of the LED lamp group module, and is connected with the main circuit. Meanwhile, the second control module is connected with the 6th pin of the MCU module to receive the high-frequency pulse width signal output by the MCU module.

[0011] The far-near switching module comprises a short circuit for shorting the LED2 and the LED3, and a MOS tube Q7 arranged on the short circuit to realize on-off control. The far-near switching module is connected with the main circuit, and has a signal input end QHIN for receiving a far-near light switching signal.

[0012] The counting detection module is connected with the MCU module and the far-near switching module. The counting detection module has a receiving end LOWIN for receiving a low beam signal, and inputs the low beam signal from the 2nd pin into the MCU module to count n2. The counting detection module has a receiving end YIN for receiving a high beam signal, and inputs the high beam signal from the 3rd pin into the MCU module to count n1.

[0013] When the value of n1+n2 reaches a set number N within a set time t within a time T when the counting detection module starts to work, and the initial receiving end LOWIN has an input and the receiving end YIN has no input, the MCU module realizes automatic switching between the manual mode and the automatic mode through the built-in program.

[0014] When the value of n1+n2 reaches a set number N within a set time t within a time T when the counting detection module starts to work, and the initial receiving end LOWIN has no input and the receiving end YIN has an input, the MCU module realizes automatic switching between the high beam mode and the low beam mode with / without animation through the built-in program.

[0015] Further, the time T is 60S, the set time t is 10 seconds, and the set number N is 6 times.

[0016] Further, the voltage supplied to the MCU module after the voltage reduction circuit reduces the voltage is 5V.

[0017] Further, when the ambient light is bright, the photodiode D1 is turned on, the MCU module receives the high level input from the 4th pin, and outputs the high level at the 5th pin to control the first control module; when the ambient light is dark, the photodiode D1 is turned off, the MCU module receives the low level input from the 4th pin, and outputs the low level at the 5th pin.

[0018] Further, the first control module further comprises resistors R3, R4, R5, R6, R7, R8, a triode Q9, a MOS tube Q2, and a voltage stabilizing diode ZD2; one side of the resistor R3 is connected to the 5th pin of the MCU module to receive the output signal of the MCU module to control the on-off of the triode Q9; the on-off of the triode Q9 is transmitted to the MOS tube Q1 through the MOS tube Q2 to control the on-off of the MOS tube Q1.

[0019] Further, the second control module further comprises resistors R17, R18, R19, R20, R23, triodes Q3, Q4, and a voltage stabilizing diode ZD3; one side of the resistor R17 is connected to the 6th pin of the MCU module to receive the high-frequency pulse width signal output by the MCU module; the triode Q3 is transmitted to the MOS tube Q5 through the triode Q4 to control the on-off of the MOS tube Q5.

[0020] Further, the distance and proximity switching module further comprises resistors R21, R22, R24, and a triode Q6; one side of the resistor R21 is connected to the signal input end QHIN of the low beam switching signal to control the on-off of the triode Q6; the on-off of the triode Q6 controls the on-off of the MOS tube Q7, i.e., whether the LED2 and the LED3 are short-circuited.

[0021] Further, the count detection module further comprises resistors R10, R11, R12, R13, R14 and R15, one side of the resistor R10 is connected with a receiving end LOWIN for receiving low beam signals, the resistor R10 is connected in series with the resistor R11 at the 2th pin of the MCU module after being divided by the resistor R12, one side of the resistor R13 is connected with a receiving end YIN for receiving high beam signals, the resistor R13 is connected in series with the resistor R14 at the 3th pin of the MCU module after being divided by the resistor R15.

[0022] The present application has the following advantages over the prior art:

[0023] 1. The light-sensitive diode D1 senses the change of the ambient light to realize the control signal output of the 5th pin of the MCU module, thereby realizing the automatic control of the on-off of the MOS tube Q1 on the main circuit, meanwhile, the high-frequency pulse signal output by the 6th pin of the MCU module realizes the automatic control of the on-off of the MOS tube Q5 on the line of the LED lamp module, thereby realizing the automatic headlight function, which can distinguish the ambient light and the light well, the position of the light-sensitive diode D1 does not need to consider the interference of the LED light source, the installation position of the light-sensitive diode D1 is no longer limited, and the high integration of the light-controlled LED vehicle lamp module is realized.

[0024] 2. The light-controlled LED vehicle lamp module can realize the manual / automatic mode switching function and the automatic switching of the high / low beam mode with / without animation through the built-in program of the MCU module, one set of vehicle lamp module can meet the actual needs of consumers of different groups, and the manufacturing cost of the manufacturer can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is a logic diagram of a light-controlled animation LED vehicle lamp module with manual / automatic mode switching function;

[0026] Fig. 2 is a circuit diagram of a light-controlled animation LED vehicle lamp module with manual / automatic mode switching function;

[0027] Fig. 3 is a circuit diagram of a light-controlled animation LED vehicle lamp module with manual / automatic mode switching function

[0028] (the same as Fig. 2);

[0029] The arrow in Fig. 1 is the signal transmission direction. DETAILED DESCRIPTION

[0030] As shown in FIG. 1, FIG. 2 and FIG. 3, the light-controlled animation LED car lamp module with hand / automatic mode switching function comprises a power module, a main circuit, an MCU module, a light sensing module, a first control module, a constant current IC module, an LED lamp module, a second control module, a far-near switching module and a counting detection module. The power module is connected to the main circuit through a position lamp input terminal WZDIN. The MCU module is connected to the main circuit through a voltage reduction circuit. The MCU module outputs a high-frequency pulse width signal through a 6-pin. The light sensing module comprises a photo diode D1 and a series resistor R1. The photo diode D1 is connected to the MCU module to monitor the ambient light change and input a monitoring signal to the MCU module through a 4-pin. Meanwhile, the MCU module outputs a light control signal through a 5-pin according to the monitoring signal of the 4-pin. The first control module comprises a MOS tube Q1 arranged on the main circuit to realize on-off control. The first control module is connected to the main circuit and the 5-pin of the MCU module to receive the signal output by the 5-pin of the MCU module. The constant current IC module is connected to the main circuit. The LED lamp module is connected to the main circuit and the constant current IC module. The LED lamp module comprises series-connected LED1, LED2 and LED3. The LED1 is used as a near light lamp, and the LED2 and LED3 are used as far light lamps. The second control module comprises a MOS tube Q5 arranged on the main circuit to realize on-off control of the LED lamp module. The second control module is connected to the main circuit and the 6-pin of the MCU module to receive the high-frequency pulse width signal output by the 6-pin of the MCU module. The far-near switching module comprises a short circuit for short-circuiting the LED2 and LED3 and a MOS tube Q7 arranged on the short circuit to realize on-off control. The far-near switching module is connected to the main circuit and has a signal input terminal QHIN for receiving a far-near light switching signal. The counting detection module is connected to the MCU module and the far-near switching module. The counting detection module has a receiving terminal LOWIN for receiving a near light signal and inputs the near light signal to the MCU module through a 2-pin to count n2. The counting detection module has a receiving terminal YIN for receiving a far light signal and inputs the far light signal to the MCU module through a 3-pin to count n1. When the value of n1+n2 reaches a set number N within a set time t and the initial receiving terminal LOWIN has an input and the receiving terminal YIN has no input within a time T when the counting detection module starts to work, the MCU module realizes automatic switching between hand mode and automatic mode through a built-in program. When the value of n1+n2 reaches the set number N within the set time t and the initial receiving terminal LOWIN has no input and the receiving terminal YIN has an input within the time T when the counting detection module starts to work, the MCU module realizes automatic switching between the animation headlamp mode and the non-animation headlamp mode through the built-in program. The time T is 60 seconds, the set time t is 10 seconds, and the set number N is 6 times. The voltage reduction circuit inputs a voltage of 5V to the VCC terminal of the MCU module.When the ambient light is bright, the photodiode D1 is turned on, the MCU module receives the high level input from the 4th pin and outputs a high level at the 5th pin to control the first control module, when the ambient light is dark, the photodiode D1 is turned off, the MCU module receives the low level input from the 4th pin and outputs a low level at the 5th pin; the first control module further comprises resistors R3, R4, R5, R6, R7, R8, a triode Q9, a MOS tube Q2 and a voltage stabilizing diode ZD2, one side of the resistor R3 is connected to the 5th pin of the MCU module to receive the output signal of the MCU module to control the triode Q9, the triode Q9 is connected to the MOS tube Q1 through the MOS tube Q2 to control the MOS tube Q1; the second control module further comprises resistors R17, R18, R19, R20, R23, triodes Q3, Q4 and a voltage stabilizing diode ZD3, one side of the resistor R17 is connected to the 6th pin of the MCU module to receive the high frequency pulse width signal output by the MCU module, the triode Q3 is connected to the MOS tube Q5 through the triode Q4 to control the MOS tube Q5; the distance switching module further comprises resistors R21, R22, R24 and a triode Q6, one side of the resistor R21 is connected to the signal input end QHIN of the low beam switching signal to control the triode Q6, the triode Q6 controls the MOS tube Q7, i.e. whether the LED2 and the LED3 are short-circuited; the counting detection module further comprises resistors R10, R11, R12, R13, R14 and R15, one side of the resistor R10 is connected to the receiving end LOWIN of the low beam signal, the resistor R10 is connected to the 2nd pin of the MCU module through the resistor R12 and the resistor R11, one side of the resistor R13 is connected to the receiving end YIN of the high beam signal, the resistor R13 is connected to the 3rd pin of the MCU module through the resistor R15 and the resistor R14.

[0031] The photodiode D1 senses the light change of the environment to output the control signal of the 5th pin of the MCU module, and then controls the MOS tube Q1 on the main circuit, meanwhile, the MCU module outputs the high frequency pulse width signal from the 6th pin to control the MOS tube Q5 on the LED lamp module, thus realizing the automatic headlight function, which can distinguish the ambient light and the light well, the position of the photodiode D1 does not need to consider the interference of the LED light source, and the installation position of the photodiode D1 is no longer limited, thus realizing the high integration of the light-controlled LED vehicle lamp module; the light-controlled LED vehicle lamp module can realize the hand / automatic mode switching function and the automatic switching between the animation headlight mode and the non-animation headlight mode through the built-in program of the MCU module, and one set of vehicle lamp module can meet the actual needs of consumers of different groups, thus saving the manufacturing cost of the manufacturer.

[0032] In particular use, for the convenience of understanding the present application, the description is made in conjunction with the drawings;

[0033] The principle of the automatic switching function of the light-controlled LED vehicle lamp module is as follows:

[0034] The MCU module outputs a high-frequency high-frequency pulse signal, when the high-frequency pulse signal is at high level, the transistor Q3 (NPN type) is turned on, the transistor Q4 (PNP type) is turned on, and the MOS tube Q5 (N channel type) is turned on; when the high-frequency pulse signal is at low level, the transistor Q3 (NPN type) is cut off, the transistor Q4 (PNP type) is cut off, and the MOS tube Q5 (N channel type) is cut off, that is, through the change of the high-frequency pulse signal, the state of the MOS tube Q5 (N channel type) is changed rapidly, and the intermittent and rapid on-off switching of the circuit of the series-connected LED1, LED2 and LED3 is realized. Thus, the conditions for light bright-dark switching and animation headlight are provided.

[0035] On the main circuit, when the induced light intensity is weak, the photosensitive diode D1 is cut off, the 4-pin input of the MCU module is at low level, and correspondingly, the 5-pin output of the MCU module is at low level, the transistor Q9 (NPN type) is cut off, the MOS tube Q2 (N channel type) is turned on, and the MOS tube Q1 (P channel type) is turned on due to the resistance of the pull-up resistor R7 being much greater than that of the pull-down resistor R8, and the main circuit is automatically connected; when the induced light intensity is strong, the photosensitive diode D1 is turned on, the 4-pin input of the MCU module is at high level, and correspondingly, the 5-pin output of the MCU module is at high level, the transistor Q9 (NPN type) is turned on, the MOS tube Q2 (N channel type) is cut off, and the MOS tube Q1 (P channel type) is cut off, and the main circuit is automatically disconnected.

[0036] When the environment is dark and the LEDs of the LED lamp module are all turned off, the photosensitive diode D1 can capture the signal, the 4-pin of the MCU module receives a continuous low potential signal and controls the MOS tube Q1 (P channel type) to be turned on, the main circuit is automatically connected, and the LED lamp module works so that the signal received by the 4-pin of the MCU module becomes an intermittent signal; when the environment is always bright (more than 10s), the photosensitive diode D1 can capture the signal, the 4-pin of the MCU module receives a continuous high potential signal and controls the MOS tube Q1 (P channel type) to be cut off, the main circuit is automatically disconnected, and after the main circuit is disconnected, the signal received by the 4-pin of the MCU module is still a continuous high level signal; due to the high frequency of the high-frequency pulse signal, the blinking of the LED1, LED2 and LED3 of the LED lamp module cannot be captured by the naked eye, and in actual product design, the switching time period of the LED lamp module can be set to 0.015 seconds, in which the on time is 0.012 seconds and the off time is 0.003 seconds, that is, the signal in one period of the high-frequency pulse waveform is 11110.

[0037] The high-low light switching signal can be inputted by the dialing of the high-low light switch. When the signal input end QHIN receiving the high-low light switching signal receives a high level, the transistor Q6 (NPN type) is turned on, and the MOS tube Q7 (P channel type) is turned on. At this time, LED2 and LED3 are short-circuited, and LED1 emits light in the low light state. When the signal input end QHIN receiving the high-low light switching signal receives a low level, the transistor Q6 (NPN type) is cut off, and the MOS tube Q7 (P channel type) is cut off. At this time, LED1, LED2 and LED3 can all emit light, and the high light state is achieved.

[0038] The switching process of the automatic / manual mode of the light-controlled LED vehicle lamp module is as follows: the dialing of the high-low light switch performs signal switching at the signal input end QHIN, and the low light state signal is input to the MCU module through the 2-pin of the MCU module for accumulation, and the high light state signal is input to the MCU module through the 3-pin of the MCU module for accumulation. If the number of high-low light switching reaches 10 times (n1+n2>=10) within the set time 10s (t<=10), the MCU module automatically realizes the switching of the manual mode and the automatic mode or the automatic switching of the animation headlight mode and the non-animation headlight mode through the built-in program.

[0039] The built-in program is as follows:

[0040] ①The 1-pin is a power supply pin VCC.

[0041] ②The 2-pin is a low light detection pin, which detects the low light input state in real time. If a high level is detected, it is a low light input, and if a low level is detected, it is no low light input.

[0042] ③The 3-pin is a high light detection pin, which detects the high light input state in real time. If a high level is detected, it is a high light input, and if a low level is detected, it is no high light input.

[0043] ④The 4-pin is a photodiode D1 detection pin, which determines the high and low levels. If the low level is continuously detected, it indicates that the ambient light is dark and the headlight is not on. At this time, the 5-pin output is low, and the hardware is turned on.

[0044] At this time, the ambient light is still dark but the headlight is on, and the signal detected by the 4-pin becomes 101010. The duration ratio of 1 and 0 is

[0045] 4:1 (0.012S:0.003S); if the signal detected by the 4-pin is continuously high and the time exceeds 10S (to prevent other light interference or sudden changes in ambient light brightness), it indicates that the ambient light is bright. At this time, the 5-pin output is high, and the hardware is turned off.

[0046] ⑤Mode one:

[0047] 5th pin outputs corresponding level signal according to the signal detected by 4th pin.

[0048] Mode two:

[0049] 5th pin always outputs low level, and the headlamp is always on.

[0050] Switching condition of mode one and mode two: within the first 60 seconds of starting (within 1 minute of starting the headlamp), if the level mutation of 3rd pin and 2nd pin is detected for more than 6 times within 10 seconds, mode one is switched to mode two (or mode two is switched to mode one), and the switching state can be saved after power-off.

[0051] 6th pin is a high-frequency pulse output signal, and in normal state: the pulse period is 0.015 seconds, the high level is 0.012 seconds, and the low level is 0.003 seconds. When starting, the pulse period is 0.015 seconds, and the proportion of high level and low level changes. The higher the proportion of high level, the brighter the light. In combination with the output state of 5th pin, near and far light starting and near and far light brightness stepless change can be realized, so as to realize animation headlamp.

[0052] 7th pin is a burning write pin.

[0053] 8th pin is a common ground.

[0054] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A light-controlled animated LED vehicle lamp module with a hand / automatic mode switching function, characterized in that, It includes: Power module and main circuit, the power module is input to the main circuit through the position lamp input end WZDIN; MCU module, the MCU module is connected with the main circuit through the voltage reduction circuit, the MCU module outputs high frequency pulse width signal through 6 feet; Light sensing module, the light sensing module includes a photodiode D1 and a series resistor R1, the photodiode D1 is connected with the MCU module to monitor ambient light changes and real-time monitoring signal is input from 4 feet into the MCU module, at the same time, the MCU module executes the light control signal output of 5 feet according to the monitoring signal of 4 feet; The first control module includes the MOS tube Q1 for realizing on-off control arranged on the main circuit, the first control module is connected with the main circuit, and the first control module is connected with the 5 feet of the MCU module to receive the signal output by the 5 feet of the MCU module;The first control module further includes resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, resistor R8, triode Q9, MOS tube Q2 and ZD2, one side of the resistor R3 is connected with the 5 feet of the MCU module to receive the output signal of the MCU module to realize the on-off control of the triode Q9, and the on-off of the triode Q9 is transmitted to the MOS tube Q1 through the MOS tube Q2 to realize the on-off control of the MOS tube Q1; Constant current IC module, the constant current IC module is connected with the main circuit; LED lamp group module, the LED lamp group module is connected with the main circuit and the constant current IC module, and the LED lamp group module includes serially connected LED1, LED2 and LED3, the LED1 is used as a low beam, and the LED2 and the LED3 are used as a high beam; The second control module includes the MOS tube Q5 for realizing the on-off control of the LED lamp group module circuit, the second control module is connected with the main circuit, and the second control module is connected with the 6 feet of the MCU module to receive the high frequency pulse width signal output by the MCU module;The second control module further includes resistor R17, resistor R18, resistor R19, resistor R20, resistor R23, triode Q3, triode Q4 and ZD3, one side of the resistor R17 is connected with the 6 feet of the MCU module to receive the high frequency pulse width signal output by the MCU module, and the triode Q3 is transmitted to the MOS tube Q5 through the triode Q4 to realize the on-off control of the MOS tube Q5; The far and near switching module includes a short circuit for shorting the LED2 and the LED3 and a MOS tube Q7 arranged on the short circuit for realizing on-off control, the far and near switching module is connected with the main circuit, and the far and near switching module has a signal input end QHIN for receiving far and near light switching signal; The counting detection module is connected with the MCU module and the far-near switching module, has a receiving end LOWIN for receiving the low beam signal, and inputs the low beam signal from the pin 2 to the MCU module to count n2; the counting detection module has a receiving end YIN for receiving the high beam signal, and inputs the high beam signal from the pin 3 to the MCU module to count n1; When the value of n1+n2 reaches the set number N within the set time t within the time T when the counting detection module starts to work, and the initial receiving end LOWIN has input and the receiving end YIN has no input, the MCU module automatically switches the manual / automatic mode through the built-in program; When the value of n1+n2 reaches the set number N within the set time t within the time T when the counting detection module starts to work, and the initial receiving end LOWIN has no input and the receiving end YIN has input, the MCU module automatically switches the high beam / low beam mode through the built-in program.

2. The light-controlled animation LED vehicle lamp module with hand / automatic mode switching function according to claim 1, characterized in that: The time T is 60 seconds, the set time t is 10 seconds, and the set number N is 6 times.

3. The light-controlled animation LED vehicle lamp module with hand / automatic mode switching function according to claim 1, characterized in that: The voltage supplied to the MCU module after the voltage reduction circuit reduces the voltage from the pin 1 of the VCC end of the MCU module is 5V.

4. The light-controlled animation LED vehicle lamp module with the manual / automatic mode switching function according to claim 3, characterized in that: When the ambient light is bright, the photodiode D1 is turned on, the MCU module receives the high level input from the pin 4, and outputs the high level at the pin 5 to control the first control module; when the ambient light is dark, the photodiode D1 is turned off, the MCU module receives the low level input from the pin 4, and outputs the low level at the pin 5.

5. The light-controlled animation LED vehicle lamp module with hand / automatic mode switching function according to claim 1, characterized in that: The far-near switching module further includes a resistor R21, a resistor R22, a resistor R24, and a transistor Q6; one side of the resistor R21 is connected with the signal input end QHIN of the low beam switching signal to control the on-off of the transistor Q6; the on-off of the transistor Q6 controls the on-off of the MOS tube Q7, that is, whether the LED2 and the LED3 are short-circuited.

6. The light-controlled animation LED vehicle lamp module with hand / automatic mode switching function according to claim 1, characterized in that: The counting detection module further includes a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, and a resistor R15; one side of the resistor R10 is connected with the receiving end LOWIN for receiving the low beam signal; the resistor R10 is connected to the pin 2 of the MCU module in series with the resistor R11 after being divided by the resistor R12; one side of the resistor R13 is connected with the receiving end YIN for receiving the high beam signal; the resistor R13 is connected to the pin 3 of the MCU module in series with the resistor R14 after being divided by the resistor R15.

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