Dimming sun visor drive circuit and dimming sun visor

Abstract

The utility model discloses a dimming sun visor driving circuit and a dimming sun visor, the dimming sun visor driving circuit comprises a battery, a booster circuit, an AC driving circuit, a first light detection circuit, a second light detection circuit, a third light detection circuit and a micro-processing unit, the booster circuit is used for boosting the voltage of the battery; the alternating-current driving circuit is electrically connected to the booster circuit and used for converting the voltage boosted by the booster circuit into alternating-current voltage, and the alternating-current voltage is used for driving the liquid crystal film to work; the first light detection circuit is used for converting a light signal of a cab into a first electric signal; the second light detection circuit is used for converting a light signal in front of the automobile into a second electric signal; the third light detection circuit is used for converting a light signal of sunlight into a third electric signal; and the micro-processing unit can perform driving control on the booster circuit and the alternating current driving circuit according to the first electric signal, the second electric signal and the third electric signal, so that the transmittance of the liquid crystal film is adjusted.

Description

Technical Field

[0001] The present application relates to the technical field of automobile accessories, and in particular to a dimming sun visor driving circuit and a dimming sun visor. Background Art

[0002] Traditional automobile sun visors are located above the front windshield of the automobile, and common sun visors are retractable and light-proof. When strong light (such as sunlight) appears above the front of the automobile, it can be manually lowered to block the strong light and ensure driving safety.

[0003] The panel of the sun visor is generally supported by traditional cloth, organic glass or polyester compounds. The color and light transmittance of the panel are fixed and cannot be adjusted according to the brightness of the external environment. When encountering the high beam of the opposite vehicle or passing through a dim environment such as a tunnel, the sun visor is likely to limit the driver's field of vision due to its fixed light transmittance. Therefore, some manufacturers apply liquid crystal technology to the sun visor to make the light transmittance of the sun visor adjustable.

[0004] However, when most cars are driven at night, the high beam headlights from oncoming cars are very dazzling, causing temporary blindness to the driver, which can easily lead to blind spots in the driving field of vision and cause traffic accidents. The existing LCD sun visor has no anti-glare function at night and is difficult to meet the anti-glare needs of users. Utility Model Content

[0005] The main purpose of this application is to propose a dimming sun visor driving circuit and a dimming sun visor, aiming to solve the technical problems that the existing liquid crystal sun visor cannot be intelligently dimmed and has no anti-glare function at night.

[0006] To achieve the above purpose, the present application proposes a dimming sunshade driving circuit, comprising:

[0007] Battery;

[0008] A charging circuit, electrically connected to the battery, and used to charge the battery;

[0009] A boost circuit, electrically connected to the battery, and configured to boost the voltage of the battery;

[0010] an AC driving circuit, electrically connected to the boost circuit, the AC driving circuit being used to convert the voltage boosted by the boost circuit into an AC voltage, and the AC voltage is used to drive the liquid crystal film to work;

[0011] A first light detection circuit, electrically connected to the battery, the first light detection circuit is used to convert the light signal of the cab into a first electrical signal, the first electrical signal is used to detect whether the environment is night or day;

[0012] a second light detection circuit, electrically connected to the battery, the second light detection circuit being used to convert a light signal in front of the vehicle into a second electrical signal, the second electrical signal being used to detect a high beam;

[0013] a third light detection circuit, electrically connected to the battery and the microprocessing unit, the third light detection circuit being used to convert a light signal of sunlight into a third electrical signal; and

[0014] A microprocessor unit is electrically connected to the battery, the boost circuit, the AC drive circuit, the first light detection circuit and the second light detection circuit. The battery supplies power to the microprocessor unit. The microprocessor unit is used to receive the first electrical signal, the second electrical signal and the third electrical signal. The microprocessor unit can drive and control the boost circuit and the AC drive circuit according to the first electrical signal, the second electrical signal and the third electrical signal, thereby adjusting the transmittance of the liquid crystal film.

[0015] Optionally, in some embodiments of the present application, the charging circuit includes a first controller, a first capacitor, a second capacitor, a wired charging unit, and a solar charging unit;

[0016] The first controller is provided with a battery connection pin, an enable input pin, a power supply pin and a ground pin;

[0017] The battery connection pin of the first controller is electrically connected to the positive electrode of the battery, the enable input pin and the power supply pin of the first controller are electrically connected to the first node, the ground pin of the first controller is connected to the working ground terminal, the battery connection pin of the first controller is also electrically connected to the working ground terminal through the first capacitor, and the first node is also electrically connected to the working ground terminal through the second capacitor;

[0018] The wired charging unit includes a charging connector, a first inductor, a first unidirectional diode, a first anti-static diode and a third capacitor, wherein the charging connector is provided with a power supply pin and a ground pin, wherein the power supply pin of the charging connector is electrically connected to the first end of the first inductor, the second end of the first inductor is electrically connected to the input end of the first unidirectional diode, the output end of the first unidirectional diode is electrically connected to the first node, the ground pin of the charging connector is electrically connected to the working ground end, the first end of the first inductor is also electrically connected to the working ground end through the first anti-static diode, and the second end of the first inductor is also electrically connected to the working ground end through the third capacitor;

[0019] The solar charging unit includes a solar panel, a second inductor, a second unidirectional diode, a second anti-static diode and a fourth capacitor, wherein the positive electrode of the solar panel is electrically connected to the first end of the second inductor, the second end of the second inductor is electrically connected to the input end of the second unidirectional diode, the output end of the second unidirectional diode is electrically connected to the first node, the first end of the second inductor is also electrically connected to the working ground end through the second anti-static diode, and the second end of the second inductor is also electrically connected to the working ground end through the fourth capacitor;

[0020] When the enable input pin of the first controller is at a high level, the first controller charges the battery; when the enable input pin of the first controller is at a low level, the first controller stops charging the battery.

[0021] Optionally, in some embodiments of the present application, the charging circuit further includes a charging status indicating unit and a temperature sensing unit;

[0022] The first controller is provided with a charging status indication pin, a charging completion indication pin and a temperature detection pin;

[0023] The charging status indication unit includes a first resistor, a second resistor, a first indicator light, and a second indicator light, wherein the first end of the first resistor is electrically connected to the first node, the second end of the first resistor is electrically connected to the first end of the second resistor, the second end of the second resistor is electrically connected to the charging completion indication pin of the first controller through the first indicator light, and the second end of the first resistor is also electrically connected to the charging status indication pin of the first controller through the second indicator light;

[0024] The temperature sensing unit includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a thermistor, wherein a first end of the third resistor is electrically connected to the first node, a second end of the third resistor is electrically connected to a first end of the fourth resistor, a second end of the fourth resistor is electrically connected to a temperature detection pin of the first controller and a first end of the fifth resistor, a second end of the fifth resistor is electrically connected to a first end of the sixth resistor, a second end of the sixth resistor is electrically connected to a working ground terminal, a first end of the thermistor is electrically connected to a second end of the fourth resistor, and a second end of the thermistor is electrically connected to a second end of the sixth resistor.

[0025] Optionally, in some embodiments of the present application, the boost circuit includes a second controller, a first filtering unit, a second inductor, a third unidirectional diode, a second filtering unit, a seventh resistor and a first feedback network;

[0026] The second controller is provided with a switch control pin, a control pin, a power supply pin, a ground pin and a feedback pin;

[0027] The ground pin of the second controller is electrically connected to the working ground terminal, the power supply pin of the second controller is electrically connected to the second node, the control pin of the second controller is electrically connected to the first end of the seventh resistor, the second end of the seventh resistor is electrically connected to the micro-processing unit, and the first control signal of the micro-processing unit is transmitted to the control pin of the second controller via the seventh resistor;

[0028] The first filtering unit is electrically connected to the first end of the second inductor, the second end of the second inductor is electrically connected to the switch control pin of the second controller and the first end of the third unidirectional diode, and the second end of the third unidirectional diode is electrically connected to the second filtering unit through the second node; the negative electrode of the battery transmits a first voltage to the first filtering unit through the power button switch, the first voltage is converted into a second voltage after being boosted by the boost circuit, and the second voltage is output from the second filtering unit; the second node is also electrically connected to the feedback pin of the second controller through the first feedback network.

[0029] Optionally, in some embodiments of the present application, the first filtering unit includes a third inductor, a fifth capacitor, a sixth capacitor and a seventh capacitor, the first end of the third inductor is used to receive the first voltage, the second end of the third inductor is electrically connected to the first end of the second inductor, the first end of the fifth capacitor is electrically connected to the first end of the third inductor, the second end of the fifth capacitor is electrically connected to the working ground terminal, the first end of the sixth capacitor is electrically connected to the second end of the third inductor, the second end of the sixth capacitor is electrically connected to the working ground terminal, the first end of the seventh capacitor is electrically connected to the second end of the third inductor, and the second end of the seventh capacitor is electrically connected to the working ground terminal;

[0030] The second filtering unit includes a fourth inductor, an eighth capacitor, a ninth capacitor, a tenth capacitor and an eighth resistor, the first end of the fourth inductor is electrically connected to the second node, the second end of the fourth inductor is used to output the second voltage, the first end of the eighth capacitor is electrically connected to the second node, the second end of the eighth capacitor is electrically connected to the working ground terminal, the first end of the ninth capacitor is electrically connected to the second node, the second end of the ninth capacitor is electrically connected to the working ground terminal, the first end of the tenth capacitor is electrically connected to the second node, the second end of the tenth capacitor is electrically connected to the working ground terminal, the first end of the eighth resistor is electrically connected to the second end of the fourth inductor, and the second end of the eighth resistor is electrically connected to the working ground terminal;

[0031] The first feedback network includes a ninth resistor, a tenth resistor and an eleventh resistor, the first end of the ninth resistor is electrically connected to the second node, the second end of the ninth resistor is electrically connected to the first end of the tenth resistor, the second end of the tenth resistor is electrically connected to the first end of the eleventh resistor, the second end of the eleventh resistor is electrically connected to the working ground terminal, and the second end of the ninth resistor is electrically connected to the feedback pin of the second controller.

[0032] Optionally, in some embodiments of the present application, the dimming sun visor driving circuit further includes a voltage regulating circuit, and the boost circuit is electrically connected to the AC driving circuit through the voltage regulating circuit; the voltage regulating circuit is used to receive the second voltage and convert the second voltage into a third voltage; the AC driving circuit is used to convert the third voltage into an AC voltage;

[0033] The microprocessing unit is electrically connected to the voltage regulating circuit, and the microprocessing unit drives and controls the voltage regulating circuit.

[0034] Optionally, in some embodiments of the present application, the voltage regulating circuit includes a third controller, a third filtering unit, a fifth inductor, a fourth filtering unit, a second feedback network, an eleventh capacitor and a twelfth resistor;

[0035] The third controller is provided with a ground pin, a switch control pin, a power input pin, a feedback pin, a control pin and a bootstrap pin;

[0036] The power input pin of the third controller is electrically connected to receive the second voltage, and the third filter unit is electrically connected to the power input pin of the third controller; the ground pin of the third controller is electrically connected to the working ground terminal; the switch control pin of the third controller is electrically connected to the first end of the fifth inductor, the second end of the fifth inductor is connected to the third node, the fourth filter unit is electrically connected to the third node, and the fourth filter unit is used to output the third voltage; the third node is also electrically connected to the feedback pin of the third controller through the second feedback network; the first end of the twelfth resistor is electrically connected to the control pin of the third controller, and the second end of the twelfth resistor is used to receive the first control signal of the microprocessing unit; the third node is also electrically connected to the bootstrap pin of the third controller through the eleventh capacitor.

[0037] Optionally, in some embodiments of the present application, the third filtering unit includes a twelfth capacitor, a thirteenth capacitor and a fourteenth capacitor, the first end of the twelfth capacitor is electrically connected to the power input pin of the third controller, and the second end of the twelfth capacitor is electrically connected to the working ground terminal; the first end of the thirteenth capacitor is electrically connected to the power input pin of the third controller, and the second end of the thirteenth capacitor is electrically connected to the working ground terminal; the first end of the fourteenth capacitor is electrically connected to the power input pin of the third controller, and the second end of the fourteenth capacitor is electrically connected to the working ground terminal;

[0038] The fourth filtering unit includes a sixth inductor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor and a thirteenth resistor, wherein a first end of the sixth inductor is electrically connected to the third node, and a second end of the sixth inductor outputs the third voltage; a first end of the fifteenth capacitor is electrically connected to the third node, and a second end of the fifteenth capacitor is electrically connected to a working ground terminal; a first end of the sixteenth capacitor is electrically connected to the third node, and a second end of the sixteenth capacitor is electrically connected to the working ground terminal; a first end of the seventeenth capacitor is electrically connected to the third node , the second end of the seventeenth capacitor is electrically connected to the working ground terminal; the first end of the eighteenth capacitor is electrically connected to the third node, and the second end of the eighteenth capacitor is electrically connected to the working ground terminal; the first end of the thirteenth resistor is electrically connected to the third node, and the second end of the thirteenth resistor is electrically connected to the working ground terminal; the first end of the nineteenth capacitor is electrically connected to the second end of the sixth inductor, and the second end of the nineteenth capacitor is electrically connected to the working ground terminal; the first end of the twentieth capacitor is electrically connected to the second end of the sixth inductor, and the second end of the twentieth capacitor is electrically connected to the working ground terminal;

[0039] The second feedback network includes a fourteenth resistor, a fifteenth resistor, a sixteenth resistor and a seventeenth resistor, the first end of the fourteenth resistor is electrically connected to the third node, the second end of the fourteenth resistor is electrically connected to the first end of the fifteenth resistor, the second end of the fifteenth resistor is electrically connected to the first end of the sixteenth resistor, the second end of the sixteenth resistor is electrically connected to the working ground terminal, and the second end of the fourteenth resistor is also electrically connected to the feedback pin of the third controller through the seventeenth resistor.

[0040] Optionally, in some embodiments of the present application, the voltage regulating circuit also includes an eighteenth resistor and a nineteenth resistor, the first end of the eighteenth resistor is electrically connected to the second end of the fourteenth resistor, the second end of the eighteenth resistor is electrically connected to the first end of the nineteenth resistor, and the second end of the nineteenth resistor is used to receive the second control signal of the microprocessing unit.

[0041] Optionally, in some embodiments of the present application, the voltage regulating circuit further includes a twentieth resistor, a twenty-first capacitor, a twenty-first resistor, and a twenty-second capacitor;

[0042] The first end of the 20th resistor is electrically connected to the first end of the 12th resistor, and the second end of the 20th resistor is electrically connected to the working ground terminal; the first end of the 21st capacitor is electrically connected to the first end of the 12th resistor, and the second end of the 21st capacitor is electrically connected to the working ground terminal;

[0043] The first end of the twenty-first resistor is electrically connected to the second end of the eighteenth resistor, and the second end of the twenty-first resistor is electrically connected to the working ground terminal; the first end of the twenty-second capacitor is electrically connected to the second end of the eighteenth resistor, and the second end of the twenty-second capacitor is electrically connected to the working ground terminal.

[0044] Optionally, in some embodiments of the present application, the AC drive circuit includes a fourth controller, a twenty-second resistor, a seventh inductor, a twenty-third capacitor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fourth capacitor, and a twenty-fifth resistor;

[0045] The fourth controller is provided with a ground pin, a power supply pin, a motor power input pin, a sleep mode control pin, a first logic input pin, a second logic input pin, a first H-bridge output pin, and a second H-bridge output pin;

[0046] The ground pin of the fourth controller is electrically connected to the working ground terminal, the first end of the twenty-second resistor is electrically connected to the sleep mode control pin of the fourth controller, and the second end of the twenty-second resistor is used to receive the first control signal of the microprocessing unit; the first end of the seventh inductor is electrically connected to the power supply pin of the fourth controller, and the second end of the seventh inductor is electrically connected to the battery; the first end of the twenty-third capacitor is electrically connected to the first end of the seventh inductor, and the second end of the twenty-third capacitor is electrically connected to the working ground terminal; the motor power input pin is used to receive the third voltage; the first logic input pin is used to receive the third control signal of the microprocessing unit, and the second logic input pin is used to receive the a fourth control signal of the microprocessing unit; a first end of the twenty-third resistor is electrically connected to the first H-bridge output pin of the fourth controller, and a second end of the twenty-third resistor is used to connect to the first electrode of the liquid crystal film; a first end of the twenty-fourth resistor is electrically connected to the second H-bridge output pin of the fourth controller, and a second end of the twenty-fourth resistor is used to connect to the second electrode of the liquid crystal film; a first end of the twenty-fourth capacitor is electrically connected to the second end of the twenty-third resistor, and a second end of the twenty-fourth capacitor is electrically connected to the second end of the twenty-fourth resistor; a first end of the twenty-fifth resistor is electrically connected to the second end of the twenty-third resistor, and a second end of the twenty-fifth resistor is electrically connected to the second end of the twenty-fourth resistor.

[0047] Optionally, in some embodiments of the present application, the first light detection circuit includes a first photosensitive transistor, a twenty-fourth capacitor, a twenty-fifth capacitor, and a twenty-sixth resistor, the first end of the first photosensitive transistor is electrically connected to a battery, the second end of the first photosensitive transistor is used to output a first electrical signal, the first end of the twenty-fourth capacitor is electrically connected to the first end of the first photosensitive transistor, the first end of the twenty-sixth resistor and the first end of the twenty-fifth capacitor are both electrically connected to the second end of the first photosensitive transistor, and the second end of the twenty-fourth capacitor, the second end of the twenty-fifth capacitor, and the second end of the twenty-sixth resistor are all electrically connected to a working ground terminal;

[0048] The second light detection circuit comprises a second photosensitive transistor, a twenty-sixth capacitor, a twenty-seventh capacitor and a twenty-seventh resistor, the first end of the second photosensitive transistor is electrically connected to the battery, the second end of the second photosensitive transistor is used to output a second electrical signal, the first end of the twenty-sixth capacitor is electrically connected to the first end of the second photosensitive transistor, the first end of the twenty-seventh resistor and the first end of the twenty-seventh capacitor are both electrically connected to the second end of the second photosensitive transistor, and the second end of the twenty-sixth capacitor, the second end of the twenty-seventh capacitor and the second end of the twenty-seventh resistor are all electrically connected to the working ground end;

[0049] The third light detection circuit includes a third photosensitive transistor, a twenty-eighth capacitor, a twenty-eighth resistor and a twenty-ninth resistor, the first end of the twenty-eighth resistor is electrically connected to the battery, the second end of the twenty-eighth resistor is used to output a third electrical signal, the first end of the third photosensitive transistor and the first end of the twenty-eighth capacitor are both electrically connected to the second end of the twenty-eighth resistor, the first end of the twenty-ninth resistor is electrically connected to the second end of the third photosensitive transistor, and the second end of the twenty-eighth capacitor and the second end of the twenty-ninth resistor are both electrically connected to the working ground terminal.

[0050] The present application also provides a dimming sunshade, comprising:

[0051] Liquid crystal film; and

[0052] The dimming sunshade driving circuit as described above.

[0053] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0054] (1) The microprocessor unit can obtain the light intensity of the cab according to the first electrical signal, thereby determining whether the environment is at night or during the day. When it is at night, the microprocessor unit can determine whether the oncoming vehicle has turned on the high beam according to the second electrical signal, and drive and control the boost circuit and the AC drive circuit, thereby controlling the light transmittance of the liquid crystal film, so that the dimming sun visor has an anti-glare function at night, thereby realizing intelligent dimming;

[0055] (2) The microprocessor unit can obtain the intensity of sunlight according to the third electrical signal. The microprocessor unit drives and controls the boost circuit and the AC drive circuit according to the third electrical signal, thereby controlling the transmittance of the liquid crystal film and realizing intelligent dimming, thereby avoiding sunlight interference with the driving field of vision and ensuring driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 This is a schematic diagram of the circuit structure of the dimming sunshade driving circuit of the present application;

[0057] Figure 2 A circuit diagram of the charging circuit of this application;

[0058] Figure 3 A circuit diagram of the boost circuit of this application;

[0059] Figure 4 A circuit diagram of the microprocessing unit of the present application;

[0060] Figure 5 A circuit diagram of the voltage regulating circuit of this application;

[0061] Figure 6A circuit diagram of the AC drive circuit of this application;

[0062] Figure 7 A circuit diagram of a first optical detection circuit of the present application;

[0063] Figure 8 A circuit diagram of a second optical detection circuit of the present application;

[0064] Fig. 9 This is a circuit diagram of the third optical detection circuit of the present application. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the scheme in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments in the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0066] See also Figure 1 , Figure 4 , Figure 7 , Figure 8 and Fig. 9 The present application provides a dimming sunshade driving circuit, comprising:

[0067] Battery BAT;

[0068] A charging circuit CHG, electrically connected to the battery BAT, and the charging circuit CHG is used to charge the battery BAT;

[0069] A boost circuit VI is electrically connected to the battery BAT, and is used to boost the voltage of the battery BAT;

[0070] The AC driving circuit INV is electrically connected to the boosting circuit VI. The AC driving circuit INV is used to convert the voltage boosted by the boosting circuit VI into an AC voltage, and the AC voltage is used to drive the liquid crystal film LC to work;

[0071] A first light detection circuit 21, electrically connected to the battery BAT, the first light detection circuit 21 is used to convert the light signal of the cab into a first electrical signal PS_BACK_OUT, the first electrical signal PS_BACK_OUT is used to detect whether the environment is night or day;

[0072] A second light detection circuit 22, electrically connected to the battery BAT, the second light detection circuit 22 is used to convert the light signal in front of the vehicle into a second electrical signal PS_FRONT1_OUT, the second electrical signal PS_FRONT1_OUT is used to detect the high beam;

[0073] A third light detection circuit 23, electrically connected to the battery BAT and the microprocessing unit MCU, and configured to convert the light signal of sunlight into a third electrical signal PS_FRONT2_OUT; and

[0074] The microprocessing unit MCU is electrically connected to the battery BAT, the boost circuit VI, the AC drive circuit INV, the first light detection circuit 21 and the second light detection circuit 22. The battery BAT supplies power to the microprocessing unit MCU. The microprocessing unit is used to receive the first electrical signal PS_BACK_OUT, the second electrical signal PS_FRONT1_OUT and the third electrical signal PS_FRONT2_OUT. The microprocessing unit MCU can drive and control the boost circuit VI and the AC drive circuit INV according to the first electrical signal PS_BACK_OUT, the second electrical signal PS_FRONT1_OUT and the third electrical signal PS_FRONT2_OUT, thereby adjusting the transmittance of the liquid crystal film LC. In the present application, the microprocessing unit MCU is a single chip microcomputer.

[0075] In the dimming visor driving circuit of the present application, the microprocessing unit MCU can obtain the light intensity of the cab according to the first electrical signal PS_BACK_OUT, so as to judge whether the environment is at night or day. When it is at night, the microprocessing unit MCU can judge whether the oncoming vehicle has turned on the high beam according to the second electrical signal PS_FRONT1_OUT, and drive and control the boost circuit VI and the AC drive circuit INV, so as to control the transmittance of the liquid crystal film LC, so that the dimming visor has an anti-glare function at night, and realizes intelligent dimming; the microprocessing unit MCU can obtain the sunlight intensity according to the third electrical signal PS_FRONT2_OUT, and the microprocessing unit MCU drives and controls the boost circuit VI and the AC drive circuit INV according to the third electrical signal PS_FRONT2_OUT, so as to control the transmittance of the liquid crystal film LC, realize intelligent dimming, avoid the interference of sunlight on the driving field of vision, and ensure driving safety.

[0076] Specifically, Figure 2 As shown, the charging circuit CHG includes a first controller U1, a first capacitor C1, a second capacitor C2, a wired charging unit and a solar charging unit.

[0077] The first controller U1 is provided with a battery connection pin, an enable input pin, a power supply pin and a ground pin. In this embodiment, the first controller U1 is an integrated circuit, pin 3 of the first controller U1 is a ground pin, pin 4 is a power supply pin, pin 5 is an enable input pin, and pin 8 is a battery connection pin.

[0078] The battery connection pin of the first controller U1 is electrically connected to the positive electrode of the battery BAT, the enable input pin and the power supply pin of the first controller U1 are electrically connected to the first node N1, the ground pin of the first controller U1 is connected to the working ground terminal, the battery connection pin of the first controller U1 is also electrically connected to the working ground terminal through the first capacitor C1, and the first node N1 is also electrically connected to the working ground terminal through the second capacitor C2;

[0079] The wired charging unit includes a charging connector CHA, a first inductor L1, a first unidirectional diode D1, a first anti-static diode ESD1 and a third capacitor C3. The charging connector CHA is provided with a power supply pin and a ground pin. The power supply pin of the charging connector CHA is electrically connected to the first end of the first inductor L1, the second end of the first inductor L1 is electrically connected to the input end of the first unidirectional diode D1, the output end of the first unidirectional diode D1 is electrically connected to the first node N1, the ground pin of the charging connector CHA is electrically connected to the working ground end, the first end of the first inductor L1 is also electrically connected to the working ground end through the first anti-static diode ESD1, and the second end of the first inductor L1 is also electrically connected to the working ground end through the third capacitor C3;

[0080] The solar charging unit includes a solar panel SB, a second inductor L2, a second unidirectional diode D2, a second anti-static diode ESD2 and a fourth capacitor C4, the positive electrode of the solar panel SB is electrically connected to the first end of the second inductor L2, the second end of the second inductor L2 is electrically connected to the input end of the second unidirectional diode D2, the output end of the second unidirectional diode D2 is electrically connected to the first node N1, the first end of the second inductor L2 is also electrically connected to the working ground end through the second anti-static diode ESD2, and the second end of the second inductor L2 is also electrically connected to the working ground end through the fourth capacitor C4;

[0081] When the enable input pin of the first controller U1 is at a high level, the first controller U1 charges the battery BAT; when the enable input pin of the first controller U1 is at a low level, the first controller U1 stops charging the battery BAT. Under this structure, the first controller U1 can charge the battery BAT preferentially through the solar panel SB or the charging connector CHA. When there is no sun or the light cannot meet the charging demand, the first controller U1 can control the charging connector CHA to charge the battery BAT.

[0082] Specifically, the charging circuit CHG further includes a charging state indicating unit CS and a temperature sensing unit TS.

[0083] The first controller U1 is provided with a charging status indication pin, a charging completion indication pin and a temperature detection pin. In this embodiment, pin 6 of the first controller U1 is a charging status indication pin, pin 7 is a charging completion indication pin, and pin 1 is a temperature detection pin.

[0084] The charging status indication unit CS includes a first resistor R1, a second resistor R2, a first indicator light 11 and a second indicator light 12, wherein the first end of the first resistor R1 is electrically connected to the first node N1, the second end of the first resistor R1 is electrically connected to the first end of the second resistor R2, the second end of the second resistor R2 is electrically connected to the charging completion indication pin of the first controller U1 through the first indicator light 11, and the second end of the first resistor R1 is also electrically connected to the charging status indication pin of the first controller U1 through the second indicator light 12; when the first controller U1 charges the battery BAT, the first indicator light 11 is off and the second indicator light 12 is on; when the first controller U1 fully charges the battery BAT, the first indicator light 11 is on and the second indicator light 12 is off.

[0085] The temperature sensing unit TS includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a thermistor RT, wherein a first end of the third resistor R3 is electrically connected to a first node N1, a second end of the third resistor R3 is electrically connected to a first end of the fourth resistor R4, a second end of the fourth resistor R4 is electrically connected to a temperature detection pin of the first controller U1 and a first end of a fifth resistor R5, a second end of the fifth resistor R5 is electrically connected to a first end of a sixth resistor R6, a second end of the sixth resistor R6 is electrically connected to a working ground terminal, a first end of the thermistor RT is electrically connected to a second end of the fourth resistor R4, and a second end of the thermistor RT is electrically connected to a second end of the sixth resistor R6; the temperature of the thermistor RT changes with the increase of charging time, and the first controller U1 obtains a voltage of a second end of the fourth resistor R4 through a temperature detection pin, and when the voltage of the second end of the fourth resistor R4 is less than a first threshold value, the charging temperature is too low, and charging is stopped; when the voltage of the second end of the fourth resistor R4 is greater than a second threshold value, the charging temperature is too high, and charging is stopped.

[0086] Specifically, Figure 3 and Figure 4 As shown, the boost circuit VI includes a second controller U2, a first filtering unit FC1, a second inductor L2, a third unidirectional diode D3, a second filtering unit FC2, a seventh resistor R7 and a first feedback network FN1.

[0087] The second controller U2 is provided with a switch control pin, a control pin, a power supply pin, a ground pin and a feedback pin. In this embodiment, the second controller U2 is an integrated circuit, pin 1 of the second controller U2 is a switch control pin, pin 2 is a ground pin, pin 3 is a feedback pin, pin 4 is a control pin, and pin 5 is a power supply pin.

[0088] The ground pin of the second controller U2 is electrically connected to the working ground terminal, the power supply pin of the second controller U2 is electrically connected to the second node N2, the control pin of the second controller U2 is electrically connected to the first end of the seventh resistor R7, the second end of the seventh resistor R7 is electrically connected to the micro-processing unit MCU, the first control signal HV_ON of the micro-processing unit MCU is transmitted to the control pin of the second controller U2 through the seventh resistor R7, and the micro-processing unit MCU can control the second controller U2 to work through the first control signal HV_ON;

[0089] The first filter unit FC1 is electrically connected to the first end of the second inductor L2, the second end of the second inductor L2 is electrically connected to the switch control pin of the second controller U2 and the first end of the third unidirectional diode D3, and the second end of the third unidirectional diode D3 is electrically connected to the second filter unit FC2 through the second node N2; the negative electrode of the battery BAT transmits the first voltage V1 to the first filter unit FC1 through the power button switch, the first voltage V1 is converted into the second voltage V2 after being boosted by the boost circuit VI, and the second voltage V2 is output from the second filter unit FC2; the second node N2 is also electrically connected to the feedback pin of the second controller U2 through the first feedback network FN1, the second controller U2 receives the electrical signal of the first feedback network FN1, and adjusts the switch control pin to switch at a certain frequency according to the electrical signal, so as to continuously charge and discharge the second inductor L2 to boost the voltage.

[0090] Specifically, the first filtering unit FC1 includes a third inductor L3, a fifth capacitor C5, a sixth capacitor C6 and a seventh capacitor C7, the first end of the third inductor L3 is used to receive the first voltage V1, the second end of the third inductor L3 is electrically connected to the first end of the second inductor L2, the first end of the fifth capacitor C5 is electrically connected to the first end of the third inductor L3, the second end of the fifth capacitor C5 is electrically connected to the working ground terminal, the first end of the sixth capacitor C6 is electrically connected to the second end of the third inductor L3, the second end of the sixth capacitor C6 is electrically connected to the working ground terminal, the first end of the seventh capacitor C7 is electrically connected to the second end of the third inductor L3, and the second end of the seventh capacitor C7 is electrically connected to the working ground terminal.

[0091] The second filtering unit FC2 includes a fourth inductor L4, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10 and an eighth resistor R8, a first end of the fourth inductor L4 is electrically connected to the second node N2, a second end of the fourth inductor L4 is used to output the second voltage V2, a first end of the eighth capacitor C8 is electrically connected to the second node N2, a second end of the eighth capacitor C8 is electrically connected to the working ground terminal, a first end of the ninth capacitor C9 is electrically connected to the second node N2, a second end of the ninth capacitor C9 is electrically connected to the working ground terminal, a first end of the tenth capacitor C10 is electrically connected to the second node N2, a second end of the tenth capacitor C10 is electrically connected to the working ground terminal, a first end of the eighth resistor R8 is electrically connected to the second end of the fourth inductor L4, and a second end of the eighth resistor R8 is electrically connected to the working ground terminal.

[0092] The first feedback network FN1 includes a ninth resistor R9, a tenth resistor R10 and an eleventh resistor R11, the first end of the ninth resistor R9 is electrically connected to the second node N2, the second end of the ninth resistor R9 is electrically connected to the first end of the tenth resistor R10, the second end of the tenth resistor R10 is electrically connected to the first end of the eleventh resistor R11, the second end of the eleventh resistor R11 is electrically connected to the working ground, and the second end of the ninth resistor R9 is electrically connected to the feedback pin of the second controller U2.

[0093] Specifically, the dimming sun visor driving circuit also includes a voltage regulating circuit AV, and the boost circuit VI is electrically connected to the AC driving circuit INV through the voltage regulating circuit AV; the voltage regulating circuit AV is used to receive the second voltage V2 and convert the second voltage V2 into a third voltage V3; the AC driving circuit INV is used to convert the third voltage V3 into an AC voltage;

[0094] The micro-processing unit MCU is electrically connected to the voltage regulating circuit AV, and the micro-processing unit MCU drives and controls the voltage regulating circuit AV.

[0095] Specifically, Figure 4 and Figure 5 As shown, the voltage regulating circuit AV includes a third controller U3, a third filtering unit FC3, a fifth inductor L5, a fourth filtering unit FC4, a second feedback network FN2, an eleventh capacitor C11 and a twelfth resistor R12.

[0096] The third controller U3 is provided with a ground pin, a switch control pin, a power input pin, a feedback pin, a control pin and a bootstrap pin. In this embodiment, the third controller U3 is an integrated circuit, and pin No. 1 of the third controller U3 is a ground pin, pin No. 2 is a switch control pin, pin No. 3 is a power input pin, pin No. 4 is a feedback pin, pin No. 5 is a control pin, and pin No. 6 is a bootstrap pin.

[0097] The power input pin of the third controller U3 is electrically connected to receive the second voltage V2, and the third filter unit FC3 is electrically connected to the power input pin of the third controller U3; the ground pin of the third controller U3 is electrically connected to the working ground terminal; the switch control pin of the third controller U3 is electrically connected to the first end of the fifth inductor L5, the second end of the fifth inductor L5 is connected to the third node N3, the fourth filter unit FC4 is electrically connected to the third node N3, and the fourth filter unit FC4 is used to output the third voltage V3; the third node N3 is also electrically connected to the feedback pin of the third controller U3 through the second feedback network FN2; the first end of the twelfth resistor R12 is electrically connected to the control pin of the third controller U3, the second end of the twelfth resistor R12 is electrically connected to the micro-processing unit MCU, and the second end of the twelfth resistor R12 is used to receive the first control signal HV_ON of the micro-processing unit MCU, and the micro-processing unit MCU can control the operation of the third controller U3 through the first control signal HV_ON; the third node N3 is also electrically connected to the bootstrap pin of the third controller U3 through the eleventh capacitor C11.

[0098] Specifically, the third filtering unit FC3 includes a twelfth capacitor C12, a thirteenth capacitor C13 and a fourteenth capacitor C14, the first end of the twelfth capacitor C12 is electrically connected to the power input pin of the third controller U3, and the second end of the twelfth capacitor C12 is electrically connected to the working ground terminal; the first end of the thirteenth capacitor C13 is electrically connected to the power input pin of the third controller U3, and the second end of the thirteenth capacitor C13 is electrically connected to the working ground terminal; the first end of the fourteenth capacitor C14 is electrically connected to the power input pin of the third controller U3, and the second end of the fourteenth capacitor C14 is electrically connected to the working ground terminal.

[0099] The fourth filtering unit FC4 includes a sixth inductor L6, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a nineteenth capacitor C19, a twentieth capacitor C20 and a thirteenth resistor R13, a first end of the sixth inductor L6 is electrically connected to the third node N3, and a second end of the sixth inductor L6 outputs a third voltage V3; a first end of the fifteenth capacitor C15 is electrically connected to the third node N3, and a second end of the fifteenth capacitor C15 is electrically connected to the working ground terminal; a first end of the sixteenth capacitor C16 is electrically connected to the third node N3, and a second end of the sixteenth capacitor C16 is electrically connected to the working ground terminal; a first end of the seventeenth capacitor C17 is electrically connected to the third node N3, and a second end of the sixteenth capacitor C17 is electrically connected to the working ground terminal; The first end of the twentieth capacitor C20 is electrically connected to the second end of the sixth inductor L6, and the second end of the twentieth capacitor C20 is electrically connected to the working ground.

[0100] The second feedback network FN2 includes a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16 and a seventeenth resistor R17, the first end of the fourteenth resistor R14 is electrically connected to the third node N3, the second end of the fourteenth resistor R14 is electrically connected to the first end of the fifteenth resistor R15, the second end of the fifteenth resistor R15 is electrically connected to the first end of the sixteenth resistor R16, the second end of the sixteenth resistor R16 is electrically connected to the working ground terminal, and the second end of the fourteenth resistor R14 is also electrically connected to the feedback pin of the third controller U3 through the seventeenth resistor R17.

[0101] Specifically, the voltage regulating circuit AV also includes an eighteenth resistor R18 and a nineteenth resistor R19, the first end of the eighteenth resistor R18 is electrically connected to the second end of the fourteenth resistor R14, the second end of the eighteenth resistor R18 is electrically connected to the first end of the nineteenth resistor R19, the second end of the nineteenth resistor R19 is electrically connected to the microprocessing unit MCU, and the second end of the nineteenth resistor R19 is used to receive the second control signal HV-PWM of the microprocessing unit MCU.

[0102] Specifically, the voltage regulating circuit AV further includes a twentieth resistor R20, a twenty-first capacitor C21, a twenty-first resistor R21 and a twenty-second capacitor C22;

[0103] A first end of the twentieth resistor R20 is electrically connected to the first end of the twelfth resistor R12, and a second end of the twentieth resistor R20 is electrically connected to the working ground; a first end of the twenty-first capacitor C21 is electrically connected to the first end of the twelfth resistor R12, and a second end of the twenty-first capacitor C21 is electrically connected to the working ground;

[0104] The first end of the twenty-first resistor R21 is electrically connected to the second end of the eighteenth resistor R18, and the second end of the twenty-first resistor R21 is electrically connected to the working ground; the first end of the twenty-second capacitor C22 is electrically connected to the second end of the eighteenth resistor R18, and the second end of the twenty-second capacitor C22 is electrically connected to the working ground.

[0105] Specifically, Figure 4 and Figure 6 As shown, the AC drive circuit INV includes a fourth controller U4, a twenty-second resistor R22, a seventh inductor L7, a twenty-third capacitor C23, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fourth capacitor C24 and a twenty-fifth resistor R25.

[0106] The fourth controller U4 is provided with a ground pin, a power supply pin, a motor power input pin, a sleep mode control pin, a first logic input pin, a second logic input pin, a first H-bridge output pin, and a second H-bridge output pin. In this embodiment, the fourth controller U4 is an integrated circuit, pin No. 1 of the fourth controller U4 is a motor power input pin, pin No. 2 is a first H-bridge output pin, pin No. 3 is a second H-bridge output pin, pin No. 4 is a ground pin, pin No. 5 is a second logic input pin, pin No. 6 is a first logic input pin, pin No. 7 is a sleep mode control pin, and pin No. 8 is a power supply pin.

[0107] The ground pin of the fourth controller U4 is electrically connected to the working ground terminal, the first end of the twenty-second resistor R22 is electrically connected to the sleep mode control pin of the fourth controller U4, the second end of the twenty-second resistor R22 is electrically connected to the microprocessing unit MCU, and the second end of the twenty-second resistor R22 is used to receive the first control signal HV_ON of the microprocessing unit MCU; the first end of the seventh inductor L7 is electrically connected to the power supply pin of the fourth controller U4, the second end of the seventh inductor L7 is electrically connected to the battery BAT, and the negative electrode of the battery BAT inputs a voltage to the seventh inductor L7 through the power button switch; the first end of the twenty-third capacitor C23 is electrically connected to the first end of the seventh inductor L7, and the second end of the twenty-third capacitor C23 is electrically connected to the working ground terminal; the motor power input pin of the fourth controller U4 is used to receive the third voltage V3; the first logic input pin of the fourth controller U4 is used to receive the microprocessing unit M The third control signal PWM1 of CU, the second logic input pin of the fourth controller U4 is used to receive the fourth control signal PWM2 of the microprocessing unit MCU; the first end of the twenty-third resistor R23 is electrically connected to the first H-bridge output pin of the fourth controller U4, and the second end of the twenty-third resistor R23 is used to connect the first electrode of the liquid crystal film LC; the first end of the twenty-fourth resistor R24 ​​is electrically connected to the second H-bridge output pin of the fourth controller U4, and the second end of the twenty-fourth resistor R24 ​​is used to connect the second electrode of the liquid crystal film LC; the first end of the twenty-fourth capacitor C24 is electrically connected to the second end of the twenty-third resistor R23, and the second end of the twenty-fourth capacitor C24 is electrically connected to the second end of the twenty-fourth resistor R24; the first end of the twenty-fifth resistor R25 is electrically connected to the second end of the twenty-third resistor R23, and the second end of the twenty-fifth resistor R25 is electrically connected to the second end of the twenty-fourth resistor R24.

[0108] Specifically, Figure 1 , Figure 4 , Figure 7 , Figure 8 and Fig. 9 As shown, the first light detection circuit 21 includes a first photosensitive transistor PS1, a twenty-fourth capacitor C24, a twenty-fifth capacitor C25 and a twenty-sixth resistor R26, the first end of the first photosensitive transistor PS1 is electrically connected to the battery BAT, the second end of the first photosensitive transistor PS1 is used to output the first electrical signal PS_BACK_OUT, the first end of the twenty-fourth capacitor C24 is electrically connected to the first end of the first photosensitive transistor PS1, the first end of the twenty-sixth resistor R26 and the first end of the twenty-fifth capacitor C25 are both electrically connected to the second end of the first photosensitive transistor PS1, and the second end of the twenty-fourth capacitor C24, the second end of the twenty-fifth capacitor C25 and the second end of the twenty-sixth resistor R26 are all electrically connected to the working ground.

[0109] The second light detection circuit 22 includes a second phototransistor PS2, a twenty-sixth capacitor C26, a twenty-seventh capacitor C27 and a twenty-seventh resistor R27. The first end of the second phototransistor PS2 is electrically connected to the battery BAT. The second end of the second phototransistor PS2 is used to output the second electrical signal PS_FRONT1_OUT. The first end of the twenty-sixth capacitor C26 is electrically connected to the first end of the second phototransistor PS2. The first end of the twenty-seventh resistor R27 and the first end of the twenty-seventh capacitor C27 are both electrically connected to the second end of the second phototransistor PS2. The second end of the twenty-sixth capacitor C26, the second end of the twenty-seventh capacitor C27 and the second end of the twenty-seventh resistor R27 are all electrically connected to the working ground.

[0110] The third light detection circuit 23 includes a third photosensitive transistor PS3, a twenty-eighth capacitor C28, a twenty-eighth resistor R28 and a twenty-ninth resistor R29. The first end of the twenty-eighth resistor R28 is electrically connected to the battery BAT, and the second end of the twenty-eighth resistor R28 is used to output the third electrical signal PS_FRONT2_OUT. The first end of the third photosensitive transistor PS3 and the first end of the twenty-eighth capacitor C28 are both electrically connected to the second end of the twenty-eighth resistor R28. The first end of the twenty-ninth resistor R29 is electrically connected to the second end of the third photosensitive transistor PS3. The second end of the twenty-eighth capacitor C28 and the second end of the twenty-ninth resistor R29 are both electrically connected to the working ground.

[0111] The present application also provides a dimming sunshade, comprising a liquid crystal film LC and the dimming sunshade driving circuit as described above.

[0112] It should be noted that the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0113] The above description is only a partial or preferred embodiment of the present application. Neither the text nor the drawings can limit the scope of protection of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the overall concept of the present application, or direct / indirect application in other related technical fields are included in the scope of protection of the present application.

Claims

1. A dimming sunshade driving circuit, characterized in that: include: Battery; A charging circuit, electrically connected to the battery, and used to charge the battery; A boost circuit, electrically connected to the battery, and configured to boost the voltage of the battery; an AC driving circuit, electrically connected to the boost circuit, the AC driving circuit being used to convert the voltage boosted by the boost circuit into an AC voltage, and the AC voltage is used to drive the liquid crystal film to work; A first light detection circuit, electrically connected to the battery, the first light detection circuit is used to convert the light signal of the cab into a first electrical signal, the first electrical signal is used to detect whether the environment is night or day; a second light detection circuit, electrically connected to the battery, the second light detection circuit being used to convert a light signal in front of the vehicle into a second electrical signal, the second electrical signal being used to detect a high beam; a third light detection circuit, electrically connected to the battery and the microprocessor unit, and configured to convert a light signal of sunlight into a third electrical signal; as well as A microprocessor unit is electrically connected to the battery, the boost circuit, the AC drive circuit, the first light detection circuit and the second light detection circuit. The battery supplies power to the microprocessor unit. The microprocessor unit is used to receive the first electrical signal, the second electrical signal and the third electrical signal. The microprocessor unit can drive and control the boost circuit and the AC drive circuit according to the first electrical signal, the second electrical signal and the third electrical signal, thereby adjusting the transmittance of the liquid crystal film.

2. The dimming sunshade driving circuit according to claim 1, characterized in that: The charging circuit includes a first controller, a first capacitor, a second capacitor, a wired charging unit and a solar charging unit; The first controller is provided with a battery connection pin, an enable input pin, a power supply pin and a ground pin; The battery connection pin of the first controller is electrically connected to the positive electrode of the battery, the enable input pin and the power supply pin of the first controller are electrically connected to the first node, the ground pin of the first controller is connected to the working ground terminal, the battery connection pin of the first controller is also electrically connected to the working ground terminal through the first capacitor, and the first node is also electrically connected to the working ground terminal through the second capacitor; The wired charging unit includes a charging connector, a first inductor, a first unidirectional diode, a first anti-static diode and a third capacitor, wherein the charging connector is provided with a power supply pin and a ground pin, wherein the power supply pin of the charging connector is electrically connected to the first end of the first inductor, the second end of the first inductor is electrically connected to the input end of the first unidirectional diode, the output end of the first unidirectional diode is electrically connected to the first node, the ground pin of the charging connector is electrically connected to the working ground end, the first end of the first inductor is also electrically connected to the working ground end through the first anti-static diode, and the second end of the first inductor is also electrically connected to the working ground end through the third capacitor; The solar charging unit includes a solar panel, a second inductor, a second unidirectional diode, a second anti-static diode and a fourth capacitor, wherein the positive electrode of the solar panel is electrically connected to the first end of the second inductor, the second end of the second inductor is electrically connected to the input end of the second unidirectional diode, the output end of the second unidirectional diode is electrically connected to the first node, the first end of the second inductor is also electrically connected to the working ground end through the second anti-static diode, and the second end of the second inductor is also electrically connected to the working ground end through the fourth capacitor; When the enable input pin of the first controller is at a high level, the first controller charges the battery; when the enable input pin of the first controller is at a low level, the first controller stops charging the battery.

3. The dimming sunshade driving circuit according to claim 2, characterized in that: The charging circuit also includes a charging status indication unit and a temperature sensing unit; The first controller is provided with a charging status indication pin, a charging completion indication pin and a temperature detection pin; The charging status indication unit includes a first resistor, a second resistor, a first indicator light, and a second indicator light, wherein the first end of the first resistor is electrically connected to the first node, the second end of the first resistor is electrically connected to the first end of the second resistor, the second end of the second resistor is electrically connected to the charging completion indication pin of the first controller through the first indicator light, and the second end of the first resistor is also electrically connected to the charging status indication pin of the first controller through the second indicator light; The temperature sensing unit includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a thermistor, wherein a first end of the third resistor is electrically connected to the first node, a second end of the third resistor is electrically connected to a first end of the fourth resistor, a second end of the fourth resistor is electrically connected to a temperature detection pin of the first controller and a first end of the fifth resistor, a second end of the fifth resistor is electrically connected to a first end of the sixth resistor, a second end of the sixth resistor is electrically connected to a working ground terminal, a first end of the thermistor is electrically connected to a second end of the fourth resistor, and a second end of the thermistor is electrically connected to a second end of the sixth resistor.

4. The dimming sunshade driving circuit according to claim 1, characterized in that: The boost circuit includes a second controller, a first filtering unit, a second inductor, a third unidirectional diode, a second filtering unit, a seventh resistor and a first feedback network; The second controller is provided with a switch control pin, a control pin, a power supply pin, a ground pin and a feedback pin; The ground pin of the second controller is electrically connected to the working ground terminal, the power supply pin of the second controller is electrically connected to the second node, the control pin of the second controller is electrically connected to the first end of the seventh resistor, the second end of the seventh resistor is electrically connected to the micro-processing unit, and the first control signal of the micro-processing unit is transmitted to the control pin of the second controller via the seventh resistor; The first filtering unit is electrically connected to the first end of the second inductor, the second end of the second inductor is electrically connected to the switch control pin of the second controller and the first end of the third unidirectional diode, and the second end of the third unidirectional diode is electrically connected to the second filtering unit through the second node; the negative electrode of the battery transmits a first voltage to the first filtering unit through the power button switch, the first voltage is converted into a second voltage after being boosted by the boost circuit, and the second voltage is output from the second filtering unit; the second node is also electrically connected to the feedback pin of the second controller through the first feedback network.

5. The dimming sunshade driving circuit according to claim 4, characterized in that: The first filtering unit includes a third inductor, a fifth capacitor, a sixth capacitor and a seventh capacitor, wherein a first end of the third inductor is used to receive the first voltage, a second end of the third inductor is electrically connected to a first end of the second inductor, a first end of the fifth capacitor is electrically connected to a first end of the third inductor, a second end of the fifth capacitor is electrically connected to a working ground terminal, a first end of the sixth capacitor is electrically connected to a second end of the third inductor, a second end of the sixth capacitor is electrically connected to a working ground terminal, a first end of the seventh capacitor is electrically connected to a second end of the third inductor, and a second end of the seventh capacitor is electrically connected to a working ground terminal; The second filtering unit includes a fourth inductor, an eighth capacitor, a ninth capacitor, a tenth capacitor and an eighth resistor, the first end of the fourth inductor is electrically connected to the second node, the second end of the fourth inductor is used to output the second voltage, the first end of the eighth capacitor is electrically connected to the second node, the second end of the eighth capacitor is electrically connected to the working ground terminal, the first end of the ninth capacitor is electrically connected to the second node, the second end of the ninth capacitor is electrically connected to the working ground terminal, the first end of the tenth capacitor is electrically connected to the second node, the second end of the tenth capacitor is electrically connected to the working ground terminal, the first end of the eighth resistor is electrically connected to the second end of the fourth inductor, and the second end of the eighth resistor is electrically connected to the working ground terminal; The first feedback network includes a ninth resistor, a tenth resistor and an eleventh resistor, the first end of the ninth resistor is electrically connected to the second node, the second end of the ninth resistor is electrically connected to the first end of the tenth resistor, the second end of the tenth resistor is electrically connected to the first end of the eleventh resistor, the second end of the eleventh resistor is electrically connected to the working ground terminal, and the second end of the ninth resistor is electrically connected to the feedback pin of the second controller.

6. The dimming sunshade driving circuit according to claim 5, characterized in that: The dimming sunshade driving circuit also includes a voltage regulating circuit, and the boost circuit is electrically connected to the AC driving circuit through the voltage regulating circuit; the voltage regulating circuit is used to receive the second voltage and convert the second voltage into a third voltage; the AC driving circuit is used to convert the third voltage into an AC voltage; The microprocessing unit is electrically connected to the voltage regulating circuit, and the microprocessing unit drives and controls the voltage regulating circuit.

7. The dimming sunshade driving circuit according to claim 6, characterized in that: The voltage regulating circuit includes a third controller, a third filtering unit, a fifth inductor, a fourth filtering unit, a second feedback network, an eleventh capacitor and a twelfth resistor; The third controller is provided with a ground pin, a switch control pin, a power input pin, a feedback pin, a control pin and a bootstrap pin; The power input pin of the third controller is electrically connected to receive the second voltage, and the third filter unit is electrically connected to the power input pin of the third controller; the ground pin of the third controller is electrically connected to the working ground terminal; the switch control pin of the third controller is electrically connected to the first end of the fifth inductor, the second end of the fifth inductor is connected to the third node, the fourth filter unit is electrically connected to the third node, and the fourth filter unit is used to output the third voltage; the third node is also electrically connected to the feedback pin of the third controller through the second feedback network; the first end of the twelfth resistor is electrically connected to the control pin of the third controller, and the second end of the twelfth resistor is used to receive the first control signal of the microprocessing unit; the third node is also electrically connected to the bootstrap pin of the third controller through the eleventh capacitor.

8. The dimming sunshade driving circuit according to claim 7, characterized in that: The third filtering unit includes a twelfth capacitor, a thirteenth capacitor and a fourteenth capacitor, wherein a first end of the twelfth capacitor is electrically connected to a power input pin of the third controller, and a second end of the twelfth capacitor is electrically connected to a working ground terminal; a first end of the thirteenth capacitor is electrically connected to a power input pin of the third controller, and a second end of the thirteenth capacitor is electrically connected to a working ground terminal; a first end of the fourteenth capacitor is electrically connected to a power input pin of the third controller, and a second end of the fourteenth capacitor is electrically connected to a working ground terminal; The fourth filtering unit includes a sixth inductor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor and a thirteenth resistor, wherein a first end of the sixth inductor is electrically connected to the third node, and a second end of the sixth inductor outputs the third voltage; a first end of the fifteenth capacitor is electrically connected to the third node, and a second end of the fifteenth capacitor is electrically connected to a working ground terminal; a first end of the sixteenth capacitor is electrically connected to the third node, and a second end of the sixteenth capacitor is electrically connected to the working ground terminal; a first end of the seventeenth capacitor is electrically connected to the third node , the second end of the seventeenth capacitor is electrically connected to the working ground terminal; the first end of the eighteenth capacitor is electrically connected to the third node, and the second end of the eighteenth capacitor is electrically connected to the working ground terminal; the first end of the thirteenth resistor is electrically connected to the third node, and the second end of the thirteenth resistor is electrically connected to the working ground terminal; the first end of the nineteenth capacitor is electrically connected to the second end of the sixth inductor, and the second end of the nineteenth capacitor is electrically connected to the working ground terminal; the first end of the twentieth capacitor is electrically connected to the second end of the sixth inductor, and the second end of the twentieth capacitor is electrically connected to the working ground terminal; The second feedback network includes a fourteenth resistor, a fifteenth resistor, a sixteenth resistor and a seventeenth resistor, the first end of the fourteenth resistor is electrically connected to the third node, the second end of the fourteenth resistor is electrically connected to the first end of the fifteenth resistor, the second end of the fifteenth resistor is electrically connected to the first end of the sixteenth resistor, the second end of the sixteenth resistor is electrically connected to the working ground terminal, and the second end of the fourteenth resistor is also electrically connected to the feedback pin of the third controller through the seventeenth resistor.

9. The dimming sunshade driving circuit according to claim 8, characterized in that: The voltage regulating circuit also includes an eighteenth resistor and a nineteenth resistor, the first end of the eighteenth resistor is electrically connected to the second end of the fourteenth resistor, the second end of the eighteenth resistor is electrically connected to the first end of the nineteenth resistor, and the second end of the nineteenth resistor is used to receive the second control signal of the microprocessing unit.

10. The dimming sunshade driving circuit according to claim 9, characterized in that: The voltage regulating circuit further includes a twentieth resistor, a twenty-first capacitor, a twenty-first resistor and a twenty-second capacitor; The first end of the 20th resistor is electrically connected to the first end of the 12th resistor, and the second end of the 20th resistor is electrically connected to the working ground terminal; the first end of the 21st capacitor is electrically connected to the first end of the 12th resistor, and the second end of the 21st capacitor is electrically connected to the working ground terminal; The first end of the twenty-first resistor is electrically connected to the second end of the eighteenth resistor, and the second end of the twenty-first resistor is electrically connected to the working ground terminal; the first end of the twenty-second capacitor is electrically connected to the second end of the eighteenth resistor, and the second end of the twenty-second capacitor is electrically connected to the working ground terminal.

11. The dimming sunshade driving circuit according to claim 6, characterized in that: The AC drive circuit includes a fourth controller, a twenty-second resistor, a seventh inductor, a twenty-third capacitor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fourth capacitor and a twenty-fifth resistor; The fourth controller is provided with a ground pin, a power supply pin, a motor power input pin, a sleep mode control pin, a first logic input pin, a second logic input pin, a first H-bridge output pin, and a second H-bridge output pin; The ground pin of the fourth controller is electrically connected to the working ground terminal, the first end of the twenty-second resistor is electrically connected to the sleep mode control pin of the fourth controller, and the second end of the twenty-second resistor is used to receive the first control signal of the microprocessing unit; the first end of the seventh inductor is electrically connected to the power supply pin of the fourth controller, and the second end of the seventh inductor is electrically connected to the battery; the first end of the twenty-third capacitor is electrically connected to the first end of the seventh inductor, and the second end of the twenty-third capacitor is electrically connected to the working ground terminal; the motor power input pin is used to receive the third voltage; the first logic input pin is used to receive the third control signal of the microprocessing unit, and the second logic input pin is used to receive the a fourth control signal of the microprocessing unit; a first end of the twenty-third resistor is electrically connected to the first H-bridge output pin of the fourth controller, and a second end of the twenty-third resistor is used to connect to the first electrode of the liquid crystal film; a first end of the twenty-fourth resistor is electrically connected to the second H-bridge output pin of the fourth controller, and a second end of the twenty-fourth resistor is used to connect to the second electrode of the liquid crystal film; a first end of the twenty-fourth capacitor is electrically connected to the second end of the twenty-third resistor, and a second end of the twenty-fourth capacitor is electrically connected to the second end of the twenty-fourth resistor; a first end of the twenty-fifth resistor is electrically connected to the second end of the twenty-third resistor, and a second end of the twenty-fifth resistor is electrically connected to the second end of the twenty-fourth resistor.

12. The dimming sunshade driving circuit according to any one of claims 1 to 11, characterized in that: The first light detection circuit includes a first photosensitive transistor, a twenty-fourth capacitor, a twenty-fifth capacitor, and a twenty-sixth resistor, wherein a first end of the first photosensitive transistor is electrically connected to a battery, a second end of the first photosensitive transistor is used to output a first electrical signal, a first end of the twenty-fourth capacitor is electrically connected to a first end of the first photosensitive transistor, a first end of the twenty-sixth resistor and a first end of the twenty-fifth capacitor are both electrically connected to a second end of the first photosensitive transistor, and a second end of the twenty-fourth capacitor, a second end of the twenty-fifth capacitor, and a second end of the twenty-sixth resistor are all electrically connected to a working ground terminal; The second light detection circuit comprises a second photosensitive transistor, a twenty-sixth capacitor, a twenty-seventh capacitor and a twenty-seventh resistor, the first end of the second photosensitive transistor is electrically connected to the battery, the second end of the second photosensitive transistor is used to output a second electrical signal, the first end of the twenty-sixth capacitor is electrically connected to the first end of the second photosensitive transistor, the first end of the twenty-seventh resistor and the first end of the twenty-seventh capacitor are both electrically connected to the second end of the second photosensitive transistor, and the second end of the twenty-sixth capacitor, the second end of the twenty-seventh capacitor and the second end of the twenty-seventh resistor are all electrically connected to the working ground end; The third light detection circuit includes a third photosensitive transistor, a twenty-eighth capacitor, a twenty-eighth resistor and a twenty-ninth resistor, the first end of the twenty-eighth resistor is electrically connected to the battery, the second end of the twenty-eighth resistor is used to output a third electrical signal, the first end of the third photosensitive transistor and the first end of the twenty-eighth capacitor are both electrically connected to the second end of the twenty-eighth resistor, the first end of the twenty-ninth resistor is electrically connected to the second end of the third photosensitive transistor, and the second end of the twenty-eighth capacitor and the second end of the twenty-ninth resistor are both electrically connected to the working ground terminal.

13. A dimming sunshade, characterized in that: include: liquid crystal film; as well as A dimming sun visor drive circuit as described in any one of claims 1 to 12.

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