Circuit board of sun shield and sun shield

Abstract

The utility model discloses a circuit board of a sun shield and the sun shield, and relates to the technical field of sun shields. The circuit board is connected with a power switch of the sun shield based on a Hall switch circuit, a power supply of a control system of the sun shield is directly turned on and turned off, and power consumption is reduced; in a weak light or strong light environment, stepless dimming is realized through the light supplementing circuit, so that the brightness of the LED lamp is smoothly changed, and a user can adjust the LED lamp to proper brightness and color temperature according to the environment. The display circuit controls the display screen, the glass of the sun shield is coated with a film, the refractive index of light is determined by the coated film, and the display screen can be hidden; the anti-ultraviolet detection module detects the skin sunscreen degree of the user, so that the user can resist ultraviolet rays, and the user experience is improved. Furthermore, on the basis of the functions of a traditional sun shield, the functions of light supplement, low power consumption, a hidden display screen and ultraviolet-proof detection are added, and the diversity of the functions is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sun visors, in particular to a circuit board of a sun visor and a sun visor. Background Art

[0002] With the popularization and development of smart cars, the various parts and functions of cars are becoming more and more intelligent, and cars have become a part of people's daily life. Makeup is also a part of people's daily life, and in the fast-paced life and work, it is particularly important to integrate these two parts.

[0003] Traditional sun visors only support sun shading and ordinary mirror functions, and cannot meet the user's makeup needs. For example, in low-light or strong-light environments, the function of an ordinary mirror appears to be relatively simple, reducing the user experience.

[0004] Therefore, how to realize the multifunctionality of the sun visor to enhance the user experience is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] The purpose of the utility model is to provide a circuit board of a sun visor and a sun visor, so as to solve the technical problem that the traditional sun visor has a single function, thereby reducing the user experience.

[0006] In order to solve the above technical problems, the utility model provides a circuit board for a sun visor, the circuit board includes a Hall switch circuit, a fill light circuit, a display circuit and an anti-ultraviolet detection module;

[0007] The Hall switch circuit is connected to the power switch of the sun visor and is used to turn on and off the circuit power of the sun visor;

[0008] The LED light array corresponding to the fill light circuit is distributed around the display screen of the sun visor, and is used to perform stepless dimming of the fill light brightness and color temperature according to the light control signal;

[0009] The display screen of the display circuit is located below the glass of the sun visor, and a film is coated on the glass of the sun visor;

[0010] The anti-ultraviolet detection module is connected to the display circuit and is used to display the detected anti-ultraviolet level through the display screen of the display circuit;

[0011] The controller is respectively connected to the Hall switch circuit, the fill light circuit, the display circuit and the anti-ultraviolet detection module, and is used to control the Hall switch circuit, the fill light circuit, the display circuit and the anti-ultraviolet detection module according to a control signal.

[0012] In one aspect, the Hall switch circuit includes a switch subcircuit and a magnet;

[0013] A magnet is arranged inside the mirror surface of the sun visor, a first end of the switch subcircuit is connected to the vehicle power supply, and a second end is connected to the power switch of the sun visor;

[0014] The switch subcircuit is used to receive an output signal of a Hall switch, and control the connection and disconnection of a power switch of the vehicle power supply and the sun visor according to the output signal.

[0015] On the other hand, the switch subcircuit includes a first resistor, a second resistor, a third resistor, a first capacitor, a first transistor and a second transistor;

[0016] The first end of the first resistor is connected to the output signal of the Hall switch, the second end of the first resistor is connected to the control end of the first transistor; the first end of the first transistor is connected to the first end of the second resistor;

[0017] The second end of the second resistor is respectively connected to the first end of the first capacitor, the first end of the third resistor and the control end of the second transistor;

[0018] The second end of the first capacitor is connected to the vehicle power supply and connected to the second end of the third resistor;

[0019] The second end of the third resistor is connected to the first end of the second transistor, and the second end of the second transistor is connected to the power switch of the sun visor.

[0020] On the other hand, it also includes a second capacitor and a third capacitor;

[0021] The first end of the second capacitor is connected to the vehicle power supply and to the second end of the first capacitor; the second end of the second capacitor is grounded;

[0022] The first end of the third capacitor is connected to the power switch of the sun visor and to the second end of the second transistor, and the second end of the third capacitor is grounded.

[0023] On the other hand, the second transistor is a PMOS transistor, and the Hall switch is a PNP Hall switch.

[0024] On the other hand, the fill light circuit includes a main control chip and a LED light array of multiple colors; and the lighting angle of the LED light array of multiple colors is perpendicular to the illumination angle of the display screen;

[0025] The main control chip is connected to the LED light arrays of multiple colors, and is used to receive light control signals and convert the light control signals into PWM values ​​to adjust the LED light arrays of multiple colors.

[0026] On the other hand, the display screen of the display circuit includes a touch circuit;

[0027] The touch circuit is connected to the main control chip and is used for receiving the light control signal and transmitting it to the main control chip.

[0028] On the other hand, the touch circuit is located at preset positions around the display screen.

[0029] On the other hand, the anti-ultraviolet detection module is a camera;

[0030] The camera is used to collect the ultraviolet optical image of the user's face, and convert it into an electrical signal and transmit it to the controller so that the controller can process the ultraviolet optical image of the face to obtain the ultraviolet protection level, which is displayed on the display screen of the display circuit.

[0031] In order to solve the above technical problems, the utility model provides a sun visor, including the circuit board of the sun visor described above.

[0032] The utility model provides a circuit board for a sun visor, the circuit board includes a Hall switch circuit, a fill light circuit, a display circuit and an anti-ultraviolet detection module; the Hall switch circuit is connected to the power switch of the sun visor, and is used to turn on and off the circuit power of the sun visor; the LED light array corresponding to the fill light circuit is distributed around the display screen of the sun visor, and is used to perform stepless dimming of the fill light brightness and color temperature according to the light control signal; the display screen of the display circuit is located below the glass of the sun visor, and a film is coated on the glass of the sun visor; the anti-ultraviolet detection module is connected to the display circuit, and is used to display the detected anti-ultraviolet level through the display screen of the display circuit; the controller is respectively connected to the Hall switch circuit, the fill light circuit, the display circuit and the anti-ultraviolet detection module, and is used to control the Hall switch circuit, the fill light circuit, the display circuit and the anti-ultraviolet detection module according to the control signal. Based on the Hall switch circuit, the circuit board directly turns on and off the power supply of the control system of the sun visor, and reduces power consumption; in the case of weak light or strong light environment, the fill light circuit is used to realize stepless dimming, so that the brightness of the LED lamp changes smoothly, and the user can adjust to a suitable brightness and color temperature according to the environment. The display screen can be hidden by coating the glass of the sun visor with a film, and the refractive index of light is determined by the coating. The UV protection detection module detects the sun protection level of the user's skin so that the user can protect against UV rays, improving the user experience. Further, on the basis of the traditional sun visor function, the functions of fill light, low power consumption, hidden display screen and UV protection detection are added to improve the diversity of functions.

[0033] In addition, the utility model also provides a sun visor having the same beneficial effects as the circuit board of the sun visor mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic structural diagram of a circuit board of a sun visor provided in an embodiment of the utility model;

[0036] Figure 2 A circuit diagram of a Hall switch circuit provided in an embodiment of the utility model;

[0037] Figure 3 A circuit diagram of a fill light circuit provided in an embodiment of the utility model.

[0038] The figure numbers are as follows: 1 is the Hall switch circuit, 2 is the fill light circuit, 3 is the display circuit, 4 is the UV protection detection module, 5 is the power switch of the sun visor, 6 is the controller, 7 is the switch sub-circuit, 8 is the main control chip, 9 is the LED driver chip, and 10 is the LED light array. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0040] The core of the utility model is to provide a circuit board of a sun visor and a sun visor, so as to solve the technical problem that the traditional sun visor has a single function, thereby reducing the user experience.

[0041] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] It should be noted that the current car sun visor only has an ordinary mirror. In response to the fast-paced life and work, users may put on makeup in the car, but the current car sun visor cannot meet the user's many makeup needs, such as lighting, how to adjust the light to the appropriate light under strong or weak light conditions. The circuit board of the sun visor provided by the utility model can solve the above technical problems.

[0043] Figure 1 A schematic diagram of the structure of a circuit board of a sun visor provided in an embodiment of the utility model, such as Figure 1As shown, the circuit board includes a Hall switch circuit 1, a fill light circuit 2, a display circuit 3 and an anti-ultraviolet detection module 4;

[0044] The Hall switch circuit 1 is connected to the power switch 5 of the sun visor, and is used to turn on and off the circuit power of the sun visor;

[0045] The LED light array corresponding to the fill light circuit 2 is distributed around the display screen of the sun visor, and is used to perform stepless dimming of the fill light brightness and color temperature according to the light control signal;

[0046] The display screen of the display circuit 3 is located under the glass of the sun visor, and a film is coated on the glass of the sun visor;

[0047] The anti-ultraviolet detection module 4 is connected to the display circuit 3 and is used to display the detected anti-ultraviolet level through the display screen of the display circuit 3;

[0048] The controller 6 is respectively connected to the Hall switch circuit 1, the fill light circuit 2, the display circuit 3 and the anti-ultraviolet detection module 4, and is used to control the Hall switch circuit 1, the fill light circuit 2, the display circuit 3 and the anti-ultraviolet detection module 4 according to the control signal.

[0049] Specifically, the sun visor in this embodiment is mainly used in cars. The Hall switch circuit is different from other Hall switch circuits. The Hall switch circuit in this embodiment directly controls the system power supply. When the sun visor is open, the Hall switch outputs a high level and the system power supply is turned on. When the sun visor is closed, the system power supply is disconnected and the power consumption is lower. The traditional Hall switch circuit is only a switch circuit for detecting the sun visor. Regardless of whether the sun visor is open or closed, the corresponding control system is in a power supply state, and the control system is not really shut down. The Hall switch circuit in this embodiment achieves lower power consumption.

[0050] The light emitting diode (LED) array corresponding to the fill light circuit is distributed around the display screen of the sun visor for adjusting the fill light. The fill light circuit here is based on the light control signal to perform stepless dimming to adjust the brightness and color temperature of the fill light. In other words, conventional lights are based on a few fixed gears, and this embodiment is based on the combination of LED light arrays to achieve stepless dimming. The brightness of the light changes smoothly and can be adjusted from 1% to 100% without factory preset brightness restrictions.

[0051] The display screen of the display circuit is located under the glass of the sun visor. The glass of the sun visor is coated. The mirror glass is glass with a coating added on the surface. The light transmittance is determined by the coating. When the display screen is off, that is, there is no back light source, it presents a mirror effect. During normal display, because it is light-transmissive, the user can see the displayed image normally. Therefore, the display screen can present a hidden function and be hidden under the mirror glass.

[0052] The anti-ultraviolet detection module is connected to the display circuit, and can display the anti-ultraviolet level to the user through the display screen of the display circuit. The user can make up appropriately according to the displayed results to avoid uneven makeup and improve makeup efficiency.

[0053] The controller is respectively connected to the above-mentioned Hall switch circuit, fill light circuit, display circuit and anti-ultraviolet detection module, and controls the respective Hall switch circuit, fill light circuit, display circuit and anti-ultraviolet detection module based on different control signals to realize multiple functions of the sun visor.

[0054] The utility model provides a circuit board for a sun visor, the circuit board includes a Hall switch circuit, a fill light circuit, a display circuit and an anti-ultraviolet detection module; the Hall switch circuit is connected to the power switch of the sun visor, and is used to turn on and off the circuit power of the sun visor; the LED light array corresponding to the fill light circuit is distributed around the display screen of the sun visor, and is used to perform stepless dimming of the fill light brightness and color temperature according to the light control signal; the display screen of the display circuit is located under the glass of the sun visor, and a film is coated on the glass of the sun visor; the anti-ultraviolet detection module is connected to the display circuit, and is used to display the detected anti-ultraviolet level through the display screen of the display circuit; the controller is respectively connected to the Hall switch circuit, the fill light circuit, the display circuit and the anti-ultraviolet detection module, and is used to control the Hall switch circuit, the fill light circuit, the display circuit and the anti-ultraviolet detection module according to the control signal. The circuit board is based on the Hall switch circuit, directly turns on and off the power supply of the control system of the sun visor, and reduces power consumption; in the case of weak light or strong light environment, the fill light circuit is used to realize stepless dimming, so that the brightness of the LED lamp changes smoothly, and the user can adjust to the appropriate brightness and color temperature according to the environment. The display screen can be hidden by coating the glass of the sun visor with a film, and the refractive index of light is determined by the coating. The UV protection detection module detects the sun protection level of the user's skin so that the user can protect against UV rays, improving the user experience. Further, on the basis of the traditional sun visor function, the functions of fill light, low power consumption, hidden display screen and UV protection detection are added to improve the diversity of functions.

[0055] In some embodiments, the Hall switch circuit includes a switch subcircuit and a magnet;

[0056] A magnet is arranged inside the mirror surface of the sun visor, a first end of the switch subcircuit is connected to the vehicle power supply, and a second end is connected to the power switch of the sun visor;

[0057] The switch subcircuit is used to receive the output signal of the Hall switch and control the connection and disconnection of the vehicle power supply and the power switch of the sun visor according to the output signal.

[0058] Specifically, Figure 2A circuit diagram of a Hall switch circuit provided by an embodiment of the utility model, such as Figure 2 As shown, the Hall switch will output two states, high or low, according to the magnetic induction intensity of the magnetic field around it. A magnet is set inside the mirror cover of the sun visor. When the mirror cover is opened to a certain angle, the switching of the Hall switch output state will be triggered. The first end of the switch subcircuit 7 is connected to the vehicle power supply (CAR_12V), and the second end is connected to the power switch 5 (VISOR_12V) of the sun visor. The switch subcircuit 7 is used to receive the output signal of the Hall switch, where the output signal can be a high level signal or a low level signal, and the connection and disconnection of the vehicle power supply and the power switch 5 of the sun visor are controlled according to the output signal. In other words, when the magnetic field intensity is strong enough, its output signal is high, the switch subcircuit 7 is in the on state, and the power switch 5 of the sun visor inputs the vehicle power supply to power on. When the magnetic field intensity is low, its output signal is low, the switch subcircuit 7 is in the off state, and the power switch 5 of the sun visor inputs the vehicle power supply to power on. When the sun visor is not in use, only the Hall switch circuit works, and the corresponding entire sun visor does not work. When the Hall switch works normally, the power consumption is only a few milliwatts. The system power consumption is low, energy-saving and low-carbon.

[0059] In some embodiments, Figure 2 As shown, the switch sub-circuit 7 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a first transistor Q1 and a second transistor Q2;

[0060] The first end of the first resistor R1 is connected to the output signal of the Hall switch, the second end of the first resistor R1 is connected to the control end of the first transistor Q1; the first end of the first transistor Q1 is connected to the first end of the second resistor R2;

[0061] The second end of the second resistor R2 is respectively connected to the first end of the first capacitor C1, the first end of the third resistor R3, and the control end of the second transistor Q2;

[0062] The second end of the first capacitor C1 is connected to the vehicle power supply and is connected to the second end of the third resistor R3;

[0063] The second end of the third resistor R3 is connected to the first end of the second transistor Q2, and the second end of the second transistor Q2 is connected to the power switch 5 of the sun visor.

[0064] It is understandable that if Figure 2As shown, when the magnetic field strength is strong enough, its output signal is high level, that is, the output signal of the Hall switch is HALL_SW_H, the first transistor in the switch subcircuit is turned on, the voltage of the first end of the first transistor is 0, and the control end of the second transistor is connected. At this time, the second transistor is turned on, the entire switch subcircuit is in the on state, and the power switch of the sun visor inputs the vehicle power supply to power on. When the magnetic field strength is low, its output signal is low level, the first transistor of the switch subcircuit is turned off, the second transistor is turned off, the entire switch subcircuit is in the off state, and the power switch of the sun visor inputs the vehicle power supply to power on.

[0065] In the above embodiment, if Figure 2 As shown, it also includes a second capacitor C2 and a third capacitor C3;

[0066] A first end of the second capacitor C2 is connected to the vehicle power supply and is connected to a second end of the first capacitor C2; a second end of the second capacitor C2 is grounded;

[0067] A first end of the third capacitor C3 is connected to the power switch 5 of the sun visor and to the second end of the second transistor Q2 , and a second end of the third capacitor C3 is grounded.

[0068] The second capacitor and the third capacitor of this embodiment have the functions of energy storage and bypass energy storage. Sometimes the energy storage is small. When the power consumption suddenly increases, if there is no capacitor, the power supply voltage will be pulled down, generating noise and ringing. In severe cases, it will cause the central processing unit (CPU) to restart. At this time, the large-capacity capacitor can temporarily release the stored electrical energy to stabilize the power supply voltage, just like the relationship between a river and a reservoir. Bypass: the circuit current often pulsates. For example, the synchronization frequency of a digital circuit will cause the power supply voltage to pulsate. This is an AC noise. A small-capacity non-polar capacitor can bypass this noise to the ground (capacitors can pass AC and block DC, and the passband of small-capacity capacitors is much higher than that of large capacitors), which is also to improve stability.

[0069] On the basis of the above embodiment, the second transistor is a positive channel metal oxide semiconductor (Positive Channel Metal Oxide Semiconductor, PMOS) tube, and the Hall switch is a plug-and-play (Plug-And-Play, PNP) Hall switch.

[0070] Specifically, commonly used Hall switches include normally open and normally closed types. For a normally open PNP Hall switch, that is, when the magnetic induction intensity of the surrounding magnetic field is lower than the standard intensity, a high level is output, and when the magnetic induction intensity of the magnetic field is higher than the standard intensity, a low level is output. For the power supply chip, a direct current-direct current (DC-DC) or a low-power step-down voltage regulator chip (Low Dropout Regulator, LDO) chip can be used to convert the vehicle's 12V power supply to the Hall switch for power supply, so as to ensure that the second transistor is turned on when the magnetic field intensity is strong, and the second transistor is turned off when the magnetic field intensity is weak.

[0071] Based on the above embodiments, in some embodiments, the fill light circuit includes a main control chip, an LED driving chip and LED light arrays of multiple colors; and the lighting angle of the LED light arrays of multiple colors is perpendicular to the illumination angle of the display screen;

[0072] The main control chip is connected to the LED driver chip, and the LED driver chip is connected to the LED light arrays of multiple colors;

[0073] The main control chip is used to receive the light control signal and convert the light control signal into a PWM value;

[0074] The LED driver chip is used to receive the converted PWM value to adjust the LED light array of multiple colors.

[0075] Specifically, Figure 3 A circuit diagram of a fill light circuit provided by an embodiment of the utility model, such as Figure 3 As shown, the main control chip 8 of the fill light circuit controls the LED light array 10 by controlling the LED driver chip 9, wherein the LED light array 10 is of multiple colors, and may have yellow and white lights. The LED light array 10 is distributed around the display screen, and the light emission is limited by the surrounding structure. Its lighting angle is perpendicular to the illumination angle of the display screen, that is, the angle is only in the facing direction to prevent interference with other driving positions. The main control chip 8 is connected to the LED driver chip 9, and the LED driver chip 9 is connected to the LED light arrays 10 of multiple colors; the main control chip 8 is used to receive the light control signal and convert the light control signal into a pulse width modulation (PWM) value; the LED driver chip 9 is used to receive the converted PWM value to adjust the LED light arrays 10 of multiple colors, that is, to adjust the brightness of the LED lights of multiple colors to achieve a combination of multiple brightness and color temperature.

[0076] In some embodiments, the display screen of the display circuit includes a touch circuit;

[0077] The touch circuit is connected to the main control chip and is used for receiving the light control signal and transmitting it to the main control chip.

[0078] It can be understood that the touch circuit is connected to the main control chip, receives the light control signal and transmits it to the main control chip. The receiving method here is used to select different lighting modes on the display screen or drag the color temperature and brightness bar. In fact, the internal touch circuit of the display screen works to adjust the brightness and color temperature of the fill light to achieve stepless dimming. The light source can be adjusted to meet makeup needs in different weather times and different environments.

[0079] In some embodiments, the touch circuit is located at preset positions around the display screen.

[0080] It is understandable that the touch circuit is located at preset positions around the display screen, so that users can easily touch it without affecting the display area of ​​the display screen, thereby improving the user experience.

[0081] In some embodiments, the anti-ultraviolet detection module 4 is a camera;

[0082] The camera is used to collect the ultraviolet optical image of the user's face, and convert it into an electrical signal and transmit it to the controller so that the controller can process the ultraviolet optical image of the face to obtain the ultraviolet protection level, which is displayed on the display screen of the display circuit.

[0083] It can be understood that the camera collects the user's image information, which is transmitted to the controller so that the controller processes the image information to obtain the corresponding UV protection level. The UV protection level of the makeup area is displayed on the display screen of the display circuit. The user can touch up the makeup appropriately according to the display results to avoid uneven makeup and improve makeup efficiency.

[0084] In addition, since the ultraviolet rays in the car are weak, the camera can be used in conjunction with the ultraviolet lamp so that the ultraviolet lamp can provide weak fill light. The intensity of the ultraviolet fill light must comply with the GBT 30117.2-2013 standard. It should be noted that the ultraviolet lamp can exist in an LED light array of multiple colors, or an additional ultraviolet lamp can be provided. The selection of the camera and ultraviolet lamp can be based on the type of smear marks to be checked for the sunscreen effect. You can choose an ultraviolet (UV) camera and a UV lamp, or you can choose other types that can clearly show the sunscreen effect. There is no limitation here, and you can set it according to the actual situation.

[0085] Furthermore, the embodiment of the utility model also provides a sun visor, including the circuit board of the sun visor. Please refer to the above embodiment for the introduction of the sun visor provided by the utility model, which will not be repeated here. It has the same beneficial effects as the circuit board of the sun visor.

[0086] The circuit board of the sun visor and the sun visor provided by the utility model are introduced in detail above. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the utility model.

[0087] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A circuit board for a sun visor, characterized in that: The circuit board comprises a Hall switch circuit (1), a fill light circuit (2), a display circuit (3) and an anti-ultraviolet detection module (4); The Hall switch circuit (1) is connected to a power switch (5) of the sun visor, and is used to turn on and off the circuit power of the sun visor; The LED light array (10) corresponding to the fill light circuit (2) is distributed around the display screen of the sun visor and is used to perform stepless dimming of fill light brightness and color temperature according to a light control signal; The display screen of the display circuit (3) is located below the glass of the sun visor, and a film is coated on the glass of the sun visor; The anti-ultraviolet detection module (4) is connected to the display circuit (3) and is used to display the detected anti-ultraviolet level through the display screen of the display circuit (3); The controller (6) is respectively connected to the Hall switch circuit (1), the fill light circuit (2), the display circuit (3) and the anti-ultraviolet detection module (4), and is used to control the Hall switch circuit (1), the fill light circuit (2), the display circuit (3) and the anti-ultraviolet detection module (4) according to a control signal.

2. The circuit board of the sun visor according to claim 1, characterized in that: The Hall switch circuit (1) comprises a switch subcircuit (7) and a magnet; A magnet is arranged inside the mirror surface of the sun visor, a first end of the switch subcircuit (7) is connected to a vehicle power supply, and a second end is connected to a power switch (5) of the sun visor; The switch subcircuit (7) is used to receive the output signal of the Hall switch and control the connection and disconnection of the vehicle power supply and the power switch (5) of the sun visor according to the output signal.

3. The circuit board of the sun visor according to claim 2, characterized in that: The switch subcircuit (7) comprises a first resistor, a second resistor, a third resistor, a first capacitor, a first transistor and a second transistor; The first end of the first resistor is connected to the output signal of the Hall switch, the second end of the first resistor is connected to the control end of the first transistor; the first end of the first transistor is connected to the first end of the second resistor; The second end of the second resistor is respectively connected to the first end of the first capacitor, the first end of the third resistor and the control end of the second transistor; The second end of the first capacitor is connected to the vehicle power supply and connected to the second end of the third resistor; The second end of the third resistor is connected to the first end of the second transistor, and the second end of the second transistor is connected to the power switch (5) of the sun visor.

4. The circuit board of the sun visor according to claim 3, characterized in that: Also includes a second capacitor and a third capacitor; The first end of the second capacitor is connected to the vehicle power supply and to the second end of the first capacitor; the second end of the second capacitor is grounded; The first end of the third capacitor is connected to the power switch (5) of the sun visor and to the second end of the second transistor, and the second end of the third capacitor is grounded.

5. The circuit board of the sun visor according to claim 4, characterized in that: The second transistor is a PMOS transistor, and the Hall switch is a PNP Hall switch.

6. The circuit board of the sun visor according to any one of claims 1 to 5, characterized in that: The fill light circuit (2) comprises a main control chip (8), an LED driving chip (9) and a LED light array (10) of multiple colors; and the lighting angle of the LED light array (10) of multiple colors is perpendicular to the lighting angle of the display screen; The main control chip (8) is connected to the LED driving chip (9), and the LED driving chip (9) is connected to LED light arrays (10) of multiple colors; The main control chip (8) is used to receive a light control signal and convert the light control signal into a PWM value; The LED driving chip (9) is used to receive the converted PEM value to adjust the LED light array (10) of multiple colors.

7. The circuit board of the sun visor according to claim 6, characterized in that: The display screen of the display circuit (3) includes a touch circuit; The touch circuit is connected to the main control chip (8) and is used to receive the light control signal and transmit it to the main control chip (8).

8. The circuit board of the sun visor according to claim 7, characterized in that: The touch circuit is located at preset positions around the display screen.

9. The circuit board of the sun visor according to claim 7, characterized in that: The anti-ultraviolet detection module (4) is a camera; The camera is used to collect an ultraviolet optical image of the user's face, and convert it into an electrical signal for transmission to the controller (6) so that the controller (6) can process the ultraviolet optical image of the face to obtain the ultraviolet protection level, which is displayed on the display screen of the display circuit (3).

10. A sun visor, characterized in that: A circuit board comprising the sun visor according to any one of claims 1 to 9.

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