Running water steering lamp control circuit and automobile
By designing a control module and a parallel light-emitting module, the problems of low efficiency and poor stability in traditional turn signal drive circuits are solved, achieving efficient and stable turn signal indication and improved aesthetics.
Patent Information
- Application Number
- CN202423323371.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Traditional turn signal drive circuits are inefficient, unstable, and costly, failing to effectively improve the warning effect and aesthetics.
The system employs a control module and parallel-connected light-emitting modules. The first power conversion module converts the voltage to the voltage required for the normal operation of the light-emitting modules, and the control module individually controls the light-emitting modules to illuminate one or more light-emitting diodes.
It enhances the warning effect of turn signals, improves the stability and aesthetics of the drive circuit, and reduces the cost of electronic components.
Smart Images
Figure CN223872433U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive control circuit technology, and in particular to a sequential turn signal control circuit and an automobile. Background Technology
[0002] In recent years, due to the needs of automotive exterior design, aerodynamic requirements, and aesthetic demands, low-profile, streamlined exterior shapes have become increasingly popular, and the shapes of headlights have also developed towards irregular and integrated designs, leading to the widespread application of LED light sources. Turn signals are important indicator lights that activate when a motor vehicle turns to alert vehicles and pedestrians in front, behind, and to the sides. Traditional turn signals flash at a fixed frequency, making their warning effect not very noticeable.
[0003] To address the aforementioned issues, linear chips or transistor linear constant current circuits are typically used to drive the turn signals, allowing multiple turn signals to illuminate simultaneously in a string. However, this approach suffers from low conversion efficiency, poor stability, and high cost. Utility Model Content
[0004] This invention provides a sequential turn signal control circuit and a car to ensure the turn signal indication effect and improve the stability of the drive circuit.
[0005] According to one aspect of this utility model, a sequential turn signal control circuit is provided, comprising: a control module, a first power conversion module, and multiple light-emitting modules; the multiple light-emitting modules are connected in parallel.
[0006] The light-emitting module includes a light-emitting diode, a switching unit, and a current-limiting unit;
[0007] The power supply terminal of the first power conversion module is connected to a first voltage, the output terminal of the first power conversion module is connected to the first electrode of the light-emitting diode, the second electrode of the light-emitting diode is connected to the first terminal of the current limiting unit, the second terminal of the current limiting unit is connected to the first terminal of the switching unit, and the control terminal of the switching unit is connected to the control module.
[0008] The first power conversion module is used to drive the light-emitting module, and the control module is used to control the operating state of the light-emitting module.
[0009] Optionally, the switching unit includes a first transistor and a voltage divider subunit;
[0010] The first terminal of the first transistor is connected to the second terminal of the current limiting unit, the control terminal of the first transistor is connected to the first terminal of the voltage divider unit, the second terminal of the first transistor is connected to the second terminal of the voltage divider unit, and the third terminal of the voltage divider unit is connected to the control module.
[0011] Optionally, the voltage divider subunit includes a first resistor and a second resistor;
[0012] The first end of the first resistor is connected to the control module, the second end of the first resistor is connected to the first end of the second resistor, the first end of the second resistor is connected to the control electrode of the first transistor, and the second end of the second resistor is connected to the second electrode of the first transistor.
[0013] Optionally, the current limiting unit includes a third resistor and a fourth resistor;
[0014] The first end of the third resistor is connected to the first end of the fourth resistor, the second end of the third resistor is connected to the second end of the fourth resistor, the first end of the third resistor is connected to the first electrode of the first transistor, and the second end of the third resistor is connected to the second electrode of the light-emitting diode.
[0015] Optionally, the light-emitting module further includes: a first filtering module and a second filtering module;
[0016] The first filtering module is connected to the switching unit, and the second filtering module is connected to the light-emitting diode.
[0017] Optionally, the first filtering module includes a first capacitor, and the second filtering module includes a second capacitor;
[0018] The first terminal of the first capacitor is connected to the control terminal of the switching unit, the second terminal of the first capacitor is connected to the second terminal of the switching unit, the first terminal of the second capacitor is connected to the first electrode of the light-emitting diode, and the second terminal of the second capacitor is connected to the second electrode of the light-emitting diode.
[0019] Optionally, the first power conversion module includes a DC / DC drive circuit;
[0020] The power supply terminal of the DC / DC drive circuit is connected to the first voltage, and the output terminal of the DC / DC drive circuit is connected to the light-emitting module.
[0021] Optionally, the sequential turn signal control circuit also includes a second power conversion module;
[0022] The power supply terminal of the second power conversion module is connected to the supply voltage, which is a voltage associated with the first voltage, and the output terminal of the second power conversion module is connected to the control module.
[0023] Optionally, the second power conversion module includes an LDO circuit;
[0024] The power supply terminal of the LDO circuit is connected to the supply voltage, and the output terminal of the LDO circuit is connected to the control module.
[0025] According to another aspect of the present invention, an automobile is provided, including the sequential turn signal control circuit provided in any of the above embodiments.
[0026] The technical solution of this utility model embodiment connects a control module and a light-emitting module, with the light-emitting modules connected in parallel. This allows the control module to control each light-emitting module individually, enabling single or multiple light-emitting modules to illuminate. Compared to the traditional single flashing method of turn signals, this enhances the warning effect and improves aesthetics. The technical solution of this utility model embodiment uses a first power conversion module to convert the first voltage into the voltage required for the normal operation of the light-emitting modules. Compared to existing technologies that use linear chips and transistor linear constant current circuits for driving, this ensures the stability of the driving circuit.
[0027] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram of a sequential turn signal control circuit according to an embodiment of the present invention;
[0030] Figure 2 This is a schematic diagram of the structure of a light-emitting module according to an embodiment of the present utility model;
[0031] Figure 3 This is a schematic diagram of the structure of a first power conversion module according to an embodiment of the present utility model;
[0032] Figure 4 This is a schematic diagram of another sequential turn signal control circuit provided according to an embodiment of the present utility model;
[0033] Figure 5 This is a schematic diagram of the structure of a second power conversion module according to an embodiment of the present utility model;
[0034] Figure 6 This is a schematic diagram of a control module provided according to an embodiment of the present utility model. Detailed Implementation
[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and their variations, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0037] Figure 1 This is a schematic diagram of a sequential turn signal control circuit according to an embodiment of the present invention, with reference to... Figure 1 The sequential turn signal control circuit includes a control module 10, a first power conversion module 20, and multiple light-emitting modules 30; the multiple light-emitting modules 30 are connected in parallel; each light-emitting module 30 includes a light-emitting diode D1, a switching unit 32, and a current-limiting unit 31; the power supply terminal of the first power conversion module 20 is connected to a first voltage TURN+, the output terminal of the first power conversion module 20 is connected to the first electrode of the light-emitting diode D1, the second electrode of the light-emitting diode D1 is connected to the first terminal of the current-limiting unit 31, the second terminal of the current-limiting unit 31 is connected to the first terminal of the switching unit 32, and the control terminal of the switching unit 32 is connected to the control module 10; the first power conversion module 20 is used to drive the light-emitting modules 30, and the control module 10 is used to control the operating state of the light-emitting modules 30.
[0038] This embodiment of the utility model exemplarily illustrates a sequential turn signal control circuit comprising n light-emitting modules 30, the specific number of which is related to the vehicle's requirements. The control terminal of the switching unit 32 included in each light-emitting module 30 is connected to the control module 10. Exemplarily, the control terminal of the switching unit 32 included in the first light-emitting module 30 is connected to the first terminal P1 of the control module 10, the control terminal of the switching unit 32 included in the second light-emitting module 30 is connected to the second terminal P2 of the control module 10, the control terminal of the switching unit 32 included in the third light-emitting module 30 is connected to the third terminal P3 of the control module 10, and the control terminal of the switching unit 32 included in the nth light-emitting module 30 is connected to the nth terminal Pn of the control module 10. The n light-emitting diodes D1 are turn signal LEDs, and the n current-limiting units 31 are used to adjust the current for the correspondingly connected light-emitting diodes D1.
[0039] Optionally, the second terminal of the switching unit 32 is grounded.
[0040] Specifically, when the car's turn signal is powered on, the first voltage TURN+ begins to supply power to the first power conversion module 20. The output terminal of the first power conversion module 20 outputs a second voltage VCC1 to power the light-emitting diode D1. The second voltage VCC1 is, for example, 3V. When the first terminal P0 to the nth terminal Pn of the control module 10 outputs a high level in sequence, the switching unit 32 responds to the high level and conducts sequentially, thereby allowing the light-emitting diode D1 to light up sequentially, realizing the sequential lighting of the light-emitting diode D1.
[0041] The technical solution of this utility model embodiment connects a control module and a light-emitting module, with the light-emitting modules connected in parallel. This allows the control module to control each light-emitting module individually, enabling single or multiple light-emitting modules to illuminate. Compared to the traditional single flashing method of turn signals, this enhances the warning effect and improves aesthetics. The technical solution of this utility model embodiment uses a first power conversion module to convert the first voltage into the voltage required for the normal operation of the light-emitting modules. Compared to existing technologies that use linear chips and transistor linear constant current circuits for driving, this ensures the stability of the driving circuit.
[0042] The above embodiments exemplarily explain the basic control principle of the sequential turn signal control circuit. The specific structures that each functional module in the circuit may have are described below, but they are not intended to limit the present invention.
[0043] Figure 2 This is a schematic diagram of a light-emitting module according to an embodiment of the present utility model, with reference to... Figure 2Based on the above embodiments, optionally, the switching unit 32 includes a first transistor Q1 and a voltage divider unit 321; the first terminal of the first transistor Q1 is connected to the second terminal of the current limiting unit 31, the control terminal of the first transistor Q1 is connected to the first terminal of the voltage divider unit 321, the second terminal of the first transistor Q1 is connected to the second terminal of the voltage divider unit 321, and the third terminal of the voltage divider unit 321 is connected to the control module 10. For example, the third terminal of the voltage divider unit 321 is connected to the first terminal P1 of the control module 10.
[0044] The voltage divider unit 321 is used to supply power to the control electrode of the first transistor Q1, which is a low-power transistor.
[0045] Continue to refer to Figure 2 Optionally, the voltage divider unit 321 includes a first resistor RS1 and a second resistor RS2; the first end of the first resistor RS1 is connected to the control module 10, the second end of the first resistor RS1 is connected to the first end of the second resistor RS2, the first end of the second resistor RS2 is connected to the control electrode of the first transistor Q1, and the second end of the second resistor RS2 is connected to the second electrode of the first transistor Q1.
[0046] Continue to refer to Figure 2 Optionally, the current limiting unit 31 includes a third resistor RS3 and a fourth resistor RS4; the first end of the third resistor RS3 is connected to the first end of the fourth resistor RS4, the second end of the third resistor RS3 is connected to the second end of the fourth resistor RS4, the first end of the third resistor RS3 is connected to the first electrode of the first transistor Q1, and the second end of the third resistor RS3 is connected to the second electrode of the light-emitting diode D1.
[0047] Combination Figure 1 and Figure 2 Specifically, when the car's turn signal is powered on, the first power conversion module 20 outputs a second voltage VCC1 to power the light-emitting diode D1, and adjusts the current through the third resistor RS3 and the fourth resistor RS4. When the pin of the control module 10 connected to the light-emitting diode D1 (e.g., the first terminal P1) outputs a high level, the voltage is divided by the first resistor RS1 and the second resistor RS2 to power the control electrode of the first transistor Q1. When the threshold voltage of the first transistor Q1 is reached, the first transistor Q1 conducts, thereby lighting up the light-emitting diode D1. This embodiment of the invention achieves control of the light-emitting diode by setting the light-emitting diode and the first transistor to be connected accordingly, which can realize the lighting of a single diode or multiple diodes, and also saves the cost of electronic materials.
[0048] Continue to refer to Figure 2Optionally, the light-emitting module 30 further includes: a first filter module 33 and a second filter module 34; the first filter module 33 is connected to the switching unit 32, and the second filter module 34 is connected to the light-emitting diode D1.
[0049] Both the first filtering module 33 and the second filtering module 34 are used for filtering.
[0050] Continue to refer to Figure 2 Optionally, the first filtering module includes a first capacitor CS1, and the second filtering module includes a second capacitor CS2; the first end of the first capacitor CS1 is connected to the control terminal of the switching unit 32, the second end of the first capacitor CS1 is connected to the second terminal of the switching unit 32, the first end of the second capacitor CS2 is connected to the first electrode of the light-emitting diode D1, and the second end of the second capacitor CS2 is connected to the second electrode of the light-emitting diode D1.
[0051] Specifically, during the operation of LED D1, the first capacitor CS1 absorbs voltage fluctuations, releasing or absorbing charge balance voltage when the voltage changes, ensuring the normal operation of LED D1. Furthermore, the first capacitor CS1 filters out some high-frequency noise signals, reducing interference and improving the luminous effect and quality of LED D1, making its light emission more stable and flicker-free. The second capacitor CS2 is used for high-frequency attenuation and inversion filtering of the input signal of the first transistor Q1, increasing the output power of the first transistor Q1.
[0052] Figure 3 This is a schematic diagram of the structure of a first power conversion module according to an embodiment of the present utility model, with reference to... Figure 3 Based on the above embodiments, optionally, the first power conversion module 20 includes a DC / DC drive circuit; the power supply terminal of the DC / DC drive circuit is connected to the first voltage TIURN+, and the output terminal of the DC / DC drive circuit is connected to the light-emitting module 30.
[0053] The DC / DC drive circuit can be implemented using any existing circuit capable of DC / DC drive, and this embodiment of the present invention does not impose any specific limitations.
[0054] For example, the DC / DC drive circuit may include a DC / DC conversion chip U1, a transient suppression diode TVS1, a diode D2, resistors R1-R7, capacitors C1-C13, inductors L1-L2, and a ferrite bead B1. In this circuit, the first terminal of transient voltage suppressor diode TVS1 is connected to the first voltage TURN+, and the second terminal of TVS1 is grounded. The first terminal of capacitor C1 is connected to the first voltage TURN+, and the second terminal of capacitor C1 is connected to the first terminal of capacitor C2. The second terminal of capacitor C2 is grounded. The first terminal of resistor R1 is connected to the first voltage TURN+ and is connected to the first terminal of diode D2. The second terminal of resistor R1 is grounded. The second terminal of diode D2 is connected to the first terminals of capacitors C3, C4, and L1. The second terminal of inductor L1 is connected to the first terminals of capacitors C5, C6, and C7, and the power supply terminal of DC / DC converter chip U1. The power supply terminal of DC / DC converter chip U1 is connected to the first terminal of resistor R2. The second terminal of resistor R2 is connected to the first terminal of DC / DC converter chip U1. The second terminal of DC / DC converter chip U1 is connected to the first terminal of resistor R3. The second terminal of resistor R3 is connected to the third terminal of DC / DC converter chip U1. The first terminal of capacitor C8 is connected to the third terminal of DC / DC converter chip U1. The second terminals of capacitors C3, C4, C5, C6, C7, and C8 are all grounded. The first terminal of resistor R4 is connected to the fourth terminal of DC / DC converter chip U1. The second terminal of resistor R4 is connected to the first terminal of capacitor C13. The second terminal of capacitor C13 is connected to the output terminal of DC / DC converter chip U1 and to the first terminal of inductor L2. The second terminal of inductor L2 is connected to the first terminals of capacitors C9, C10, C11, resistor R6, and ferrite bead B1. The second terminal of resistor R6 is connected to the first terminals of resistors R7 and R5. The second terminal of resistor R5 is connected to the fifth terminal of DC / DC converter chip U1. The second terminal of ferrite bead B1 is connected to the first terminal of capacitor C12 and outputs the second voltage VCC1. The sixth terminal of DC / DC converter chip U1, the second terminals of capacitors C9, C10, C11, R7, and C12 are all grounded.
[0055] Among them, resistor R4 and capacitor C13 form a bootstrap circuit, which is used for boosting the voltage inside the DC / DC converter chip U1.
[0056] Combination Figure 2 and Figure 3Specifically, when the car's turn signal is powered on, current flows through transient suppression diode TVS1, capacitors C1 and C2, inductor L1, and resistor R2 to power DC / DC converter chip U1. At this time, the voltage at the power supply terminal of DC / DC converter chip U1 is the supply voltage VIN, and capacitors C3-C7 act as filters at the power supply terminal. DC / DC converter chip U1 outputs a second voltage VCC1 through inductor L2 and ferrite bead B1 to power LED D1. Capacitor C8 is the capacitance to ground at the third terminal of DC / DC converter chip U1, used to maintain stable operation of DC / DC converter chip U1. The second voltage VCC1 output by DC / DC converter chip U1 is adjustable. For example, it can be divided by resistors R6-R7 and then passed through resistor R5 to the fifth terminal of DC / DC converter chip U1. The voltage division allows setting the output voltage VCC1 of DC / DC converter chip U1. By setting up a DC / DC drive circuit to power the LED D1, it has the advantages of high conversion efficiency and high stability, and is less affected by the environment compared to a linear constant current drive circuit.
[0057] Figure 4 This is a schematic diagram of another sequential turn signal control circuit according to an embodiment of the present invention, with reference to... Figure 4 Based on the above embodiments, optionally, the sequential turn signal control circuit further includes a second power conversion module 40; the power supply terminal of the second power conversion module 40 is connected to the supply voltage VIN, which is a voltage associated with the first voltage TURN+, and the output terminal of the second power conversion module 40 is connected to the control module 10.
[0058] The second power conversion module 40 is used to convert the supply voltage VIN into the voltage required for the normal operation of the control module 10. For example, the voltage required for the normal operation of the control module 10 is 5V. The second power conversion module 40 converts the supply voltage VIN into 5V to supply power to the control module 10.
[0059] Figure 5 This is a schematic diagram of a second power conversion module according to an embodiment of the present utility model, with reference to... Figure 5 Based on the above embodiments, optionally, the second power conversion module 40 includes an LDO circuit; the power supply terminal of the LDO circuit is connected to the supply voltage VIN, and the output terminal of the LDO circuit is connected to the control module 10.
[0060] The LDO circuit can be implemented using any existing circuit capable of LDO conversion, and this embodiment of the invention does not impose any specific limitations.
[0061] For example, an LDO circuit may include an LDO conversion chip U2, capacitors C13-C19, resistors R8-R9, and a ferrite bead B2. The power supply terminals of LDO converter chip U2 are connected to the first terminals of capacitors C16, C17, C18, and C19, and the first terminal of ferrite bead B2. The second terminal of ferrite bead B2 is connected to the power supply voltage VIN. The first terminal of resistor R8 is connected to the first terminal of LDO converter chip U2, and the second terminal of resistor R8 is connected to the first terminal of resistor R9. The second terminal of resistor R8 is connected to the power supply voltage VIN. The second terminal of LDO converter chip U2 is grounded. The output terminals of LDO converter chip U2 are connected to the first terminals of capacitors C13, C14, and C15, and output a third voltage VCC2, which is, for example, 5V. The second terminals of capacitors C13, C14, C15, C16, C17, C18, C19, and R9 are all grounded.
[0062] Combination Figure 3 and Figure 5 Specifically, when the car's turn signal is powered on, the current flows through the transient suppression diode TVS1, capacitors C1 and C2, inductor L1, and ferrite bead B2, converting the first voltage TURN+ into the supply voltage VIN, which powers the LDO converter chip U2. Capacitors C16-C19 are used for filtering. The LDO converter chip U2 then converts the supply voltage VIN into a third voltage VCC2 before outputting it to power the control module 10. Capacitors C13-C15 are used for filtering to ensure the stability of the output third voltage VCC2.
[0063] Figure 6 This is a schematic diagram of a control module according to an embodiment of the present utility model, with reference to... Figure 6 Based on the above embodiments, optionally, the control module 10 may include a microcontroller U3, ferrite beads B3-B4, and capacitors C20-C21. The microcontroller U3 may include 14 pins, each serving as a corresponding terminal of the control module 10. The first to twelfth pins of the microcontroller U3 are connected to the light-emitting module 30. The first terminal of the ferrite bead B3 is connected to the thirteenth pin of the microcontroller U3 and to the first terminal of capacitor C20. The second terminal of the ferrite bead B3 is connected to the first terminal of capacitor C21 and receives a third voltage VCC2. The second terminal of capacitor C21 is grounded and connected to the first terminal of ferrite bead B4. The second terminal of ferrite bead B4 is connected to the second terminal of capacitor C20. The second terminal of capacitor C20 is connected to the fourteenth pin of the microcontroller U3.
[0064] The microcontroller U3 has an input voltage of 5V, and the ferrite beads B3-B4 and capacitors C20-C21 are used to filter the 5V input voltage of the microcontroller U3.
[0065] The following is combined with Figure 6 Taking 12 light-emitting modules (n-those) as an example, the specific control process of the control module 30 will be explained in detail.
[0066] Specifically, the first to twelfth pins of the microcontroller U3 are sequentially output as high level. After being divided by the first resistor RS1 and the second resistor RS2, the voltage is supplied to the control electrode of the first transistor Q1. When the threshold voltage of the first transistor Q1 is reached, the first transistor Q1 is sequentially turned on, and the light-emitting diode D1 is sequentially lit by current to achieve the effect of flowing light.
[0067] It should be noted that, in order to clearly show the connection relationship of the circuit components, the accompanying drawings of this utility model use connection terminals of some circuit components to represent the circuit components. Those skilled in the art will understand that, on the final PCB board, the circuit components can be connected to the corresponding connection terminals in the drawings.
[0068] This utility model embodiment also provides a car that includes the sequential turn signal control circuit provided in any of the above embodiments, and thus has corresponding beneficial effects.
[0069] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.
[0070] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A sequential turn signal control circuit, characterized in that, include: Control module, first power conversion module and multiple light-emitting modules; Multiple light-emitting modules are connected in parallel; The light-emitting module includes a light-emitting diode, a switching unit, and a current-limiting unit; The power supply terminal of the first power conversion module is connected to a first voltage, the output terminal of the first power conversion module is connected to the first electrode of the light-emitting diode, the second electrode of the light-emitting diode is connected to the first terminal of the current limiting unit, the second terminal of the current limiting unit is connected to the first terminal of the switching unit, and the control terminal of the switching unit is connected to the control module. The first power conversion module is used to drive the light-emitting module, and the control module is used to control the operating state of the light-emitting module.
2. The sequential turn signal control circuit according to claim 1, characterized in that, The switching unit includes a first transistor and a voltage divider subunit; The first terminal of the first transistor is connected to the second terminal of the current limiting unit, the control terminal of the first transistor is connected to the first terminal of the voltage divider unit, the second terminal of the first transistor is connected to the second terminal of the voltage divider unit, and the third terminal of the voltage divider unit is connected to the control module.
3. The sequential turn signal control circuit according to claim 2, characterized in that, The voltage divider subunit includes a first resistor and a second resistor; The first end of the first resistor is connected to the control module, the second end of the first resistor is connected to the first end of the second resistor, the first end of the second resistor is connected to the control electrode of the first transistor, and the second end of the second resistor is connected to the second electrode of the first transistor.
4. The sequential turn signal control circuit according to claim 3, characterized in that, The current limiting unit includes a third resistor and a fourth resistor; The first end of the third resistor is connected to the first end of the fourth resistor, the second end of the third resistor is connected to the second end of the fourth resistor, the first end of the third resistor is connected to the first electrode of the first transistor, and the second end of the third resistor is connected to the second electrode of the light-emitting diode.
5. The sequential turn signal control circuit according to claim 1, characterized in that, The light-emitting module further includes: a first filtering module and a second filtering module; The first filtering module is connected to the switching unit, and the second filtering module is connected to the light-emitting diode.
6. The sequential turn signal control circuit according to claim 5, characterized in that, The first filtering module includes a first capacitor, and the second filtering module includes a second capacitor; The first terminal of the first capacitor is connected to the control terminal of the switching unit, the second terminal of the first capacitor is connected to the second terminal of the switching unit, the first terminal of the second capacitor is connected to the first electrode of the light-emitting diode, and the second terminal of the second capacitor is connected to the second electrode of the light-emitting diode.
7. The sequential turn signal control circuit according to claim 1, characterized in that, The first power conversion module includes a DC / DC drive circuit; The power supply terminal of the DC / DC drive circuit is connected to the first voltage, and the output terminal of the DC / DC drive circuit is connected to the light-emitting module.
8. The sequential turn signal control circuit according to claim 1, characterized in that, It also includes a second power conversion module; The power supply terminal of the second power conversion module is connected to the supply voltage, which is a voltage associated with the first voltage, and the output terminal of the second power conversion module is connected to the control module.
9. The sequential turn signal control circuit according to claim 8, characterized in that, The second power conversion module includes an LDO circuit; The power supply terminal of the LDO circuit is connected to the supply voltage, and the output terminal of the LDO circuit is connected to the control module.
10. A car, characterized in that, The system includes the sequential turn signal control circuit as described in any one of claims 1-9.