Anti-dazzling system of rearview mirror

Abstract

The utility model discloses a rearview mirror anti-dazzling system, which relates to the technical field of rearview mirror anti-dazzling, and comprises a power supply module, a detection module, a control module and a driving module, the power supply module is connected with the detection module, the control module and the driving module, and is used for supplying power to the detection module, the control module and the driving module; the detection module comprises a first light sensor and a second light sensor, the first light sensor is used for detecting the light intensity in front of a vehicle where the rearview mirror is located, and the second light sensor is used for detecting the light intensity behind the vehicle where the rearview mirror is located; the driving module is connected with the control module and the rearview mirror lens; the control module is used for calculating the light intensity difference between the light intensity in front of the vehicle and the light intensity behind the vehicle and controlling the color depth of the rearview mirror lens through the driving module according to the light intensity difference. The system can realize full-automatic rearview mirror glare suppression, and has the advantages of false triggering prevention, low cost and high response speed.

Description

Technical Field

[0001] This utility model relates to the field of rearview mirror anti-glare technology, and in particular to a rearview mirror anti-glare system. Background Technology

[0002] With the increasing popularity of electric two-wheelers, consumers are demanding more and more features from these vehicles. Many people encounter the following situations when traveling at night: vehicles behind them are using headlights or high beams, and the glare from the rearview mirrors can cause drivers to have blurred vision or not be able to see the road conditions clearly. As a result, the proportion of traffic accidents caused by glare from strong lights is rising significantly.

[0003] Traditional rearview mirror anti-glare systems mostly rely on manual mechanical adjustments (such as prism-type flip-up) or simple reflective coatings, both requiring manual operation by the driver. These delays can lead to safety hazards, especially at night. Existing automatic anti-glare rearview mirrors (such as those based on liquid crystal or electrolyte-based electronic dimming technology) suffer from slow response times and high costs. Therefore, there is an urgent need for a low-cost, automatically adjustable rearview mirror anti-glare system. Utility Model Content

[0004] In response to the aforementioned problems and technical requirements, the applicant has proposed a rearview mirror anti-glare system.

[0005] The technical solution of this utility model is as follows:

[0006] A rearview mirror anti-glare system includes a power supply module, a detection module, a control module, and a drive module, wherein...

[0007] The power supply module is connected to the detection module, control module, and drive module, and is used to supply power to the detection module, control module, and drive module.

[0008] The detection module includes a first light sensor and a second light sensor. The first light sensor is used to detect the light intensity in front of the vehicle where the rearview mirror is located, and the second light sensor is used to detect the light intensity behind the vehicle where the rearview mirror is located.

[0009] The control module is connected to the first and second optical sensors in the detection module, and the drive module is connected to the control module and the rearview mirror lens.

[0010] The control module is used to calculate the light intensity difference between the light intensity in front of the vehicle and the light intensity behind the vehicle, and to control the color depth of the rearview mirror lens through the drive module based on the light intensity difference.

[0011] A further technical solution is that the rearview mirror lens includes an upper transparent conductive layer, an ion storage layer, an electrolyte layer, an electrochromic layer and a lower transparent conductive layer stacked in sequence, and light enters the rearview mirror lens through the upper transparent conductive layer.

[0012] A further technical solution is that the power module includes a power conversion chip and a voltage regulator chip;

[0013] The input pin of the power conversion chip is connected to the input power supply. The output pin of the power conversion chip is connected to the input pin of the drive module and the voltage regulator chip. The output pin of the voltage regulator chip is connected to the detection module. The input pin of the voltage regulator chip is grounded through capacitor C1. The output pin of the voltage regulator chip is grounded through capacitor C2. The ground pin of the voltage regulator chip is grounded.

[0014] A further technical solution is that the first optical sensor includes a photoresistor RL1, the second optical sensor includes a photoresistor RL2, the detection module further includes resistors R1 and R2, and the control module includes a control unit.

[0015] One end of resistors R1 and R2 is connected to the output pin of the voltage regulator chip and the power supply pin of the control unit. The other end of resistor R1 is connected to the first sampling pin of the control unit, and the other end of resistor R1 is grounded through photoresistor RL1.

[0016] The other end of resistor R2 is connected to the second sampling pin of the control unit, and the other end of resistor R2 is grounded through photoresistor RL2, and the grounding pin of the control unit is grounded.

[0017] A further technical solution is that the drive module includes a first drive unit, a second drive unit, a third drive unit, and a fourth drive unit. The first drive unit is connected to a first control pin of the control unit, the second drive unit is connected to a second control pin of the control unit, the third drive unit is connected to a third control pin of the control unit, and the fourth drive unit is connected to a fourth control pin of the control unit.

[0018] A further technical solution is that the driving module further includes capacitor C3, capacitor C4, a first switching transistor, a second switching transistor, a third switching transistor, and a fourth switching transistor, wherein...

[0019] The third electrode of the first switch and the third switch are connected to the output pin of the power conversion chip. The second electrode of the first switch and one end of the capacitor C3 are connected to the output pin of the first driving unit. The first electrode of the first switch is connected to the third electrode of the second switch, the other end of the capacitor C3, the ground pin of the first driving unit, and the upper transparent conductive layer. The second electrode of the second switch is connected to the output pin of the second driving unit. The first electrode of the second switch is grounded.

[0020] A further technical solution is that the second electrode of the third switch and one end of the capacitor C4 are connected to the output pin of the fourth driving unit, the first electrode of the third switch is connected to the third electrode of the fourth switch, the other end of the capacitor C4, the ground pin of the fourth driving unit, and the lower transparent conductive layer, the second electrode of the fourth switch is connected to the output pin of the third driving unit, and the first electrode of the fourth switch is grounded.

[0021] A further technical solution is that the first switch, the second switch, the third switch, and the fourth switch are all NMOS transistors.

[0022] A further technical solution is that the drive module also includes relays J1, J2, J3, and J4;

[0023] One end of the coil of relay J1 is connected to the output pin of the first driving unit, and the other end of the coil of relay J1 is connected to the ground pin of the first driving unit. One end of the normally open contact of relay J1 is connected to the output pin of the power conversion chip, and the other end of the normally open contact of relay J1 is connected to the upper transparent conductive layer and one end of the normally open contact of relay J2.

[0024] One end of the relay J2 coil is connected to the output pin of the second drive unit, the other end of the relay J2 coil is connected to the ground pin of the second drive unit, and the other end of the normally open contact of the relay J2 is grounded.

[0025] One end of the relay J3 coil is connected to the output pin of the fourth drive unit, and the other end of the relay J3 coil is connected to the ground pin of the fourth drive unit. One end of the normally open contact of the relay J3 is connected to the output pin of the power conversion chip, and the other end of the normally open contact of the relay J3 is connected to the lower transparent conductive layer and one end of the normally open contact of the relay J4.

[0026] One end of the relay J4 coil is connected to the output pin of the third drive unit, the other end of the relay J4 coil is connected to the ground pin of the third drive unit, and the other end of the normally open contact of the relay J4 is grounded.

[0027] A further technical solution is that the input power source is a lithium battery, a supercapacitor, or the main battery of the vehicle where the rearview mirror is located.

[0028] The beneficial technical effects of this utility model are:

[0029] This invention overcomes the passive nature of traditional rearview mirrors, which rely on manual adjustment for anti-glare effects. It achieves fully automatic real-time glare suppression and controls the color depth of the mirror lenses by detecting the difference in light intensity between the front and rear of the vehicle. This avoids false triggering in complex environments such as rainy weather. The drive module controls the color depth of the mirror lenses by changing the current direction, resulting in a rapid response. Furthermore, this anti-glare system has a simple structure and low cost, reducing power consumption and manufacturing costs, and improving mass production feasibility. Attached Figure Description

[0030] Figure 1 This is a structural block diagram of one embodiment of the rearview mirror anti-glare system provided by this utility model.

[0031] Figure 2 This is a schematic diagram of the structure of one embodiment of the rearview mirror lens provided by this utility model.

[0032] Figure 3 This is a circuit diagram of one embodiment of the rearview mirror anti-glare system provided by this utility model.

[0033] Figure 4 This is a circuit diagram of another embodiment of the rearview mirror anti-glare system provided by this utility model. Detailed Implementation

[0034] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this disclosure.

[0035] This utility model provides a rearview mirror anti-glare system, such as Figure 1 As shown, it includes a power supply module, a detection module, a control module, and a drive module, wherein,

[0036] The power supply module is connected to the detection module, control module, and drive module, and is used to supply power to the detection module, control module, and drive module.

[0037] The detection module includes a first light sensor and a second light sensor. The first light sensor is used to detect the light intensity in front of the vehicle where the rearview mirror is located, and the second light sensor is used to detect the light intensity behind the vehicle where the rearview mirror is located.

[0038] The control module is connected to the first and second optical sensors in the detection module, and the drive module is connected to the control module and the rearview mirror lens.

[0039] The control module is used to calculate the light intensity difference between the light intensity in front of the vehicle and the light intensity behind the vehicle, and to control the color depth of the rearview mirror lens through the drive module based on the light intensity difference.

[0040] Specifically, the first light sensor is installed at the front of the vehicle where the rearview mirror is located, with its photosensitive surface facing forward to detect ambient light intensity, i.e., the light intensity in front of the vehicle. The second light sensor can be installed near the rearview mirror, with its photosensitive surface facing backward to detect the light intensity behind the vehicle. The first light sensor can be an ambient light sensor, and the second light sensor can be a narrowband light sensor. The vehicle includes, but is not limited to, an electric two-wheeled vehicle. The detection results from the first and second light sensors are transmitted to the control module. The control module calculates the light intensity difference between the light intensity in front of the vehicle and the light intensity behind the vehicle. When the light intensity difference is greater than a preset light intensity threshold, the drive module darkens the color of the rearview mirror lens, thereby changing the transmittance and reflectance of the rearview mirror lens to achieve anti-glare. Conversely, when the light intensity difference is less than the preset light intensity threshold, the drive module restores the transparency of the rearview mirror lens. The specific structure and working principle of the power module, detection module, control module, and drive module can be found in the following description. The specific value of the preset light intensity threshold can be set according to the actual application.

[0041] Furthermore, such as Figure 2 As shown, the rearview mirror lens includes an upper transparent conductive layer, an ion storage layer, an electrolyte layer, an electrochromic layer, and a lower transparent conductive layer stacked in sequence, and light enters the rearview mirror lens through the upper transparent conductive layer.

[0042] The upper and lower transparent conductive layers can be made of IOT glass, the ion storage layer can be made of WO3, the electrolyte layer can be made of Li+ ion-conducting polymer, and the electrochromic layer can be made of NiO, IrO2, or WO3. The control module controls the color depth of the rearview mirror lens through the drive module. Specifically, the control module controls the rearview mirror lens to be energized in the forward or reverse direction, which correspondingly controls the rearview mirror lens to become darker or more transparent. Taking tungsten oxide as the electrochromic layer material as an example, when the rearview mirror lens is energized in the forward direction, the current flows from the upper transparent conductive layer to the lower transparent conductive layer. Li+ ions migrate from the ion storage layer to the electrochromic layer, reducing the tungsten oxide in the electrochromic layer to dark tungsten bronze. The color of the electrochromic layer becomes darker, making the rearview mirror surface darker and achieving an anti-glare effect. When the rearview mirror lens is energized in the reverse direction, the current flows from the lower transparent conductive layer to the upper transparent conductive layer. Li+ ions migrate out of the electrochromic layer, oxidizing the tungsten bronze in the electrochromic layer to tungsten oxide. The color of the electrochromic layer becomes lighter, making the rearview mirror surface more transparent.

[0043] Furthermore, such as Figure 3 As shown, the power module includes a power conversion chip and a voltage regulator chip;

[0044] The input pin of the power conversion chip (DC-DC) is connected to the input power supply. The output pin of the power conversion chip is connected to the input pin of the drive module and the voltage regulator chip. The output pin of the voltage regulator chip is connected to the detection module. The input pin of the voltage regulator chip is grounded through capacitor C1, and the output pin of the voltage regulator chip is grounded through capacitor C2. The ground pin of the voltage regulator chip is also grounded. The voltage regulator chip can be an AMS1117. Capacitors C1 and C2 are power supply filter capacitors, which can effectively purify the power signal.

[0045] In one embodiment of this invention, the input power is obtained from the vehicle where the rearview mirror is located, i.e., provided by the vehicle's main battery. Optionally, the input power can also be an additional lithium battery or supercapacitor, etc., to reduce the power supply burden on the vehicle's main battery. The power conversion chip converts the input power into 12V power to power the drive module, and the voltage regulator module converts the 12V power into 3.3V or 5V power to power the control module.

[0046] The first optical sensor includes a photoresistor RL1, the second optical sensor includes a photoresistor RL2, the detection module also includes resistors R1 and R2, and the control module includes a control unit, which can be an STM32 series microcontroller.

[0047] One end of resistors R1 and R2 is connected to the output pin of the voltage regulator chip and the power supply pin (VCC) of the control unit. The other end of resistor R1 is connected to the first sampling pin (ADC1) of the control unit, and the other end of resistor R1 is grounded through photoresistor RL1.

[0048] The other end of resistor R2 is connected to the second sampling pin (ADC2) of the control unit, and the other end of resistor R2 is grounded through photoresistor RL2. The ground pin (GND) of the control unit is grounded.

[0049] Specifically, resistors R1 and R2 are current-limiting resistors, and the resistance values ​​of photoresistors RL1 and RL2 are affected by light intensity. The control unit samples the voltage across photoresistors RL1 and RL2 to generate a first voltage signal and a second voltage signal, respectively. The light intensity difference between the front and rear of the vehicle is determined by calculating the voltage difference between the first and second voltage signals. A preset voltage threshold corresponds to a preset light intensity threshold; when the voltage difference between the first and second voltage signals is greater than the preset voltage threshold, the light intensity difference between the front and rear of the vehicle is greater than the preset light intensity threshold.

[0050] Furthermore, the drive module includes a first drive unit (drive 1), a second drive unit (drive 2), a third drive unit (drive 3), and a fourth drive unit (drive 4). The first drive unit is connected to the first control pin (PA0) of the control unit, the second drive unit is connected to the second control pin (PA1) of the control unit, the third drive unit is connected to the third control pin (PA2) of the control unit, and the fourth drive unit is connected to the fourth control pin (PA3) of the control unit. The first to fourth drive units can be of the TLP350 model.

[0051] In one embodiment of this utility model, the driving module further includes capacitor C3, capacitor C4, a first switching transistor, a second switching transistor, a third switching transistor, and a fourth switching transistor, wherein...

[0052] The third electrodes of the first and third switching transistors are connected to the output pins of the power conversion chip. The second electrode of the first switching transistor and one end of capacitor C3 are connected to the output pin of the first driving unit. The first electrode of the first switching transistor is connected to the third electrode of the second switching transistor, the other end of capacitor C3, the ground pin of the first driving unit, and the upper transparent conductive layer. The second electrode of the second switching transistor is connected to the output pin of the second driving unit, and the first electrode of the second switching transistor is grounded. The second electrode of the third switching transistor and one end of capacitor C4 are connected to the output pin of the fourth driving unit. The first electrode of the third switching transistor is connected to the third electrode of the fourth switching transistor, the other end of capacitor C4, the ground pin of the fourth driving unit, and the lower transparent conductive layer. The second electrode of the fourth switching transistor is connected to the output pin of the third driving unit, and the first electrode of the fourth switching transistor is grounded.

[0053] like Figure 3 As shown, in one embodiment of this utility model, the first switch, the second switch, the third switch, and the fourth switch are all NMOS transistors. Figure 3 The transistors are designated NMOS1-NMOS4. For an NMOS transistor, the first electrode is the source, the second electrode is the gate, and the third electrode is the drain. Capacitors C3 and C4 are bootstrap capacitors used to drive the gate of the high-side switching transistors (NMOS1 and NMOS3) so that the gate voltage of the high-side switching transistor is higher than the input power supply voltage (12V) of the driving module, thereby turning on the high-side switching transistor.

[0054] The specific working principle of the drive module is as follows: The control unit calculates the voltage difference between the first voltage signal and the second voltage signal. When the voltage difference is greater than a preset voltage threshold, the first drive unit and the third drive unit are driven respectively through the first control pin (PA0) and the third control pin (PA2). The first drive unit and the third drive unit output a high level. The third drive unit drives the fourth switch to conduct. The first drive unit charges the capacitor C3. When the voltage across the capacitor C3 is greater than the input power supply voltage of the drive module, the first switch is turned on. Rearview mirror lens ( Figure 3 When the EC (Electronic Control Unit) is forward-biased, the rearview mirror lens darkens, achieving an anti-glare effect. When the voltage difference is not greater than a preset voltage threshold, the second control pin (PA1) and the fourth control pin (PA3) drive the second drive unit and the fourth drive unit respectively. The second drive unit and the fourth drive unit output a high level. The second drive unit drives the second switch to conduct, and the fourth drive unit charges the capacitor C4. When the voltage across the capacitor C4 is greater than the input power supply voltage of the drive module, the third switch is turned on. At this time, the rearview mirror lens is reverse-biased, and the rearview mirror lens returns to transparency.

[0055] In another embodiment of this invention, a relay is used instead of the switching transistor in the above embodiments, such as... Figure 4 As shown, the drive module includes relays J1, J2, J3, and J4.

[0056] One end of the coil of relay J1 is connected to the output pin of the first driving unit, and the other end of the coil of relay J1 is connected to the ground pin of the first driving unit. One end of the normally open contact of relay J1 is connected to the output pin of the power conversion chip, and the other end of the normally open contact of relay J1 is connected to the upper transparent conductive layer and one end of the normally open contact of relay J2. One end of the coil of relay J2 is connected to the output pin of the second driving unit, and the other end of the coil of relay J2 is connected to the ground pin of the second driving unit. The other end of the normally open contact of relay J2 is grounded.

[0057] One end of the coil of relay J3 is connected to the output pin of the fourth drive unit, and the other end of the coil of relay J3 is connected to the ground pin of the fourth drive unit. One end of the normally open contact of relay J3 is connected to the output pin of the power conversion chip, and the other end of the normally open contact of relay J3 is connected to the lower transparent conductive layer and one end of the normally open contact of relay J4. One end of the coil of relay J4 is connected to the output pin of the third drive unit, and the other end of the coil of relay J4 is connected to the ground pin of the third drive unit. The other end of the normally open contact of relay J4 is grounded.

[0058] When a relay is used instead of the switching transistor in the above embodiments, the specific working principle of the drive module is as follows: When the voltage difference is greater than a preset voltage threshold, the control unit drives the first drive unit and the third drive unit respectively through the first control pin (PA0) and the third control pin (PA2). The first drive unit and the third drive unit output a high level, energizing the coils of relays J1 and J4, closing the normally open contacts of relays J1 and J4, and energizing the rearview mirror lens in the forward direction. When the voltage difference is not greater than the preset voltage threshold, the control unit drives the second drive unit and the fourth drive unit respectively through the second control pin (PA1) and the fourth control pin (PA3). The second drive unit and the fourth drive unit output a high level, energizing the coils of relays J2 and J3, closing the normally open contacts of relays J2 and J3, and energizing the rearview mirror lens in the reverse direction.

[0059] In the description of this specification, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. The description referring to the term "an embodiment," etc., means that a specific feature, structure, material, or characteristic described in connection with that embodiment / method or example is included in at least one embodiment of this application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment. Features defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0060] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating this disclosure and are not intended to limit the scope of this disclosure. Other improvements and variations that are directly derived or conceived by those skilled in the art without departing from the spirit and concept of this utility model should be considered to be included within the protection scope of this utility model.

Claims

1. An anti-dazzle system for a rear view mirror, characterised in that, It includes a power supply module, a detection module, a control module, and a drive module, among which, The power supply module is connected to the detection module, control module, and drive module, and is used to supply power to the detection module, control module, and drive module. The detection module includes a first light sensor and a second light sensor. The first light sensor is used to detect the light intensity in front of the vehicle where the rearview mirror is located, and the second light sensor is used to detect the light intensity behind the vehicle where the rearview mirror is located. The control module is connected to the first and second optical sensors in the detection module, and the drive module is connected to the control module and the rearview mirror lens. The control module is used to calculate the light intensity difference between the light intensity in front of the vehicle and the light intensity behind the vehicle, and to control the color depth of the rearview mirror lens through the drive module based on the light intensity difference.

2. The rearview mirror anti-glare system according to claim 1, characterized in that, The rearview mirror lens includes an upper transparent conductive layer, an ion storage layer, an electrolyte layer, an electrochromic layer, and a lower transparent conductive layer stacked in sequence, with light entering the rearview mirror lens through the upper transparent conductive layer.

3. The rearview mirror anti-glare system according to claim 2, characterized in that, The power module includes a power conversion chip and a voltage regulator chip; The input pin of the power conversion chip is connected to the input power supply. The output pin of the power conversion chip is connected to the input pin of the drive module and the voltage regulator chip. The output pin of the voltage regulator chip is connected to the detection module. The input pin of the voltage regulator chip is grounded through capacitor C1. The output pin of the voltage regulator chip is grounded through capacitor C2. The ground pin of the voltage regulator chip is grounded.

4. The rearview mirror anti-glare system according to claim 3, characterized in that, The first optical sensor includes a photoresistor RL1, the second optical sensor includes a photoresistor RL2, the detection module further includes resistors R1 and R2, and the control module includes a control unit; One end of resistors R1 and R2 is connected to the output pin of the voltage regulator chip and the power supply pin of the control unit. The other end of resistor R1 is connected to the first sampling pin of the control unit, and the other end of resistor R1 is grounded through photoresistor RL1. The other end of resistor R2 is connected to the second sampling pin of the control unit, and the other end of resistor R2 is grounded through photoresistor RL2, and the grounding pin of the control unit is grounded.

5. The rearview mirror anti-glare system according to claim 4, characterized in that, The drive module includes a first drive unit, a second drive unit, a third drive unit, and a fourth drive unit. The first drive unit is connected to a first control pin of the control unit, the second drive unit is connected to a second control pin of the control unit, the third drive unit is connected to a third control pin of the control unit, and the fourth drive unit is connected to a fourth control pin of the control unit.

6. The rearview mirror anti-glare system according to claim 5, characterized in that, The driving module further includes capacitor C3, capacitor C4, a first switching transistor, a second switching transistor, a third switching transistor, and a fourth switching transistor, wherein... The third electrode of the first switch and the third switch are connected to the output pin of the power conversion chip. The second electrode of the first switch and one end of the capacitor C3 are connected to the output pin of the first driving unit. The first electrode of the first switch is connected to the third electrode of the second switch, the other end of the capacitor C3, the ground pin of the first driving unit, and the upper transparent conductive layer. The second electrode of the second switch is connected to the output pin of the second driving unit. The first electrode of the second switch is grounded.

7. The rearview mirror anti-glare system according to claim 6, characterized in that, The second electrode of the third switch and one end of the capacitor C4 are connected to the output pin of the fourth drive unit. The first electrode of the third switch is connected to the third electrode of the fourth switch, the other end of the capacitor C4, the ground pin of the fourth drive unit, and the lower transparent conductive layer. The second electrode of the fourth switch is connected to the output pin of the third drive unit, and the first electrode of the fourth switch is grounded.

8. The rearview mirror anti-glare system according to claim 7, characterized in that, The first, second, third, and fourth switching transistors are all NMOS transistors.

9. The rearview mirror anti-glare system according to claim 5, characterized in that, The drive module also includes relays J1, J2, J3, and J4; One end of the coil of relay J1 is connected to the output pin of the first driving unit, and the other end of the coil of relay J1 is connected to the ground pin of the first driving unit. One end of the normally open contact of relay J1 is connected to the output pin of the power conversion chip, and the other end of the normally open contact of relay J1 is connected to the upper transparent conductive layer and one end of the normally open contact of relay J2. One end of the relay J2 coil is connected to the output pin of the second drive unit, the other end of the relay J2 coil is connected to the ground pin of the second drive unit, and the other end of the normally open contact of the relay J2 is grounded. One end of the relay J3 coil is connected to the output pin of the fourth drive unit, and the other end of the relay J3 coil is connected to the ground pin of the fourth drive unit. One end of the normally open contact of the relay J3 is connected to the output pin of the power conversion chip, and the other end of the normally open contact of the relay J3 is connected to the lower transparent conductive layer and one end of the normally open contact of the relay J4. One end of the relay J4 coil is connected to the output pin of the third drive unit, the other end of the relay J4 coil is connected to the ground pin of the third drive unit, and the other end of the normally open contact of the relay J4 is grounded.

10. The rearview mirror anti-glare system according to claim 3, characterized in that, The input power source is a lithium battery, a supercapacitor, or the main battery of the vehicle where the rearview mirror is located.

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