Daytime running position lamp control circuit, system and method

Abstract

The invention relates to the technical field of vehicle lamps, in particular to a daytime running position lamp control circuit, system and method. Comprising an input port for receiving an external signal; the at least one MOS tube (Q8) is connected with the input port and is used for switching the state according to the received daytime running light signal; and the resistor (R36) is connected in parallel between the MOS tube (Q8) and the LED lamp string, and when the MOS tube (Q8) is switched on, the resistor (R36) is connected into a dimming circuit I FB. According to the daytime running position lamp control circuit, system and method provided by the invention, unified control of the daytime running lamp and the position lamp is realized through a single chip controller, the system design is simplified, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lamps, and in particular to a daytime running position lamp control circuit, system and method. Background Art

[0002] Daytime running lights and position lights are components of the vehicle lighting system, which provide the driver with necessary visual support under different lighting conditions. In traditional designs, daytime running lights and position lights are usually controlled independently, using different chips and circuits to drive their respective LED light strings. Although this design can meet basic functional requirements, it has certain defects:

[0003] First, independently controlled daytime running lights and position lights increase system complexity and cost, requiring more electronic components and wiring. Second, due to their independent control systems, there may be delays or incoordination when switching modes, affecting the driving experience. Summary of the invention

[0004] The present invention provides a daytime running position lamp control circuit, system and method to solve the technical problem of how to simplify the design of the vehicle lamp system and improve the reliability and response speed.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] On the one hand, a daytime running light control circuit is provided, comprising an input port for receiving an external signal; at least one MOS tube (Q8) connected to the input port for switching a state according to a received daytime running light signal; a resistor (R36) connected in parallel between the MOS tube (Q8) and an LED light string, and when the MOS tube (Q8) is turned on, the resistor (R36) is incorporated into a dimming circuit IFB; and a single chip controller configured to adjust the current intensity passing through the LED light string based on the state of the input port to switch between a position light mode and a daytime running light mode.

[0007] Furthermore, the control circuit further comprises at least one capacitor (C10) arranged between the single chip controller and the LED light string for stabilizing the output current; a voltage stabilizing diode (D15) located between the gate of the MOS tube (Q8) and the ground for protecting the MOS tube (Q8) from overvoltage damage; the MOS tube (Q8) is an N-channel enhancement type field effect transistor, the gate of which is connected to the input port, the source is grounded, and the drain is connected to one end of the resistor (R36).

[0008] Furthermore, the dimming circuit I FB includes a variable resistor (VR1), and the current flowing into the LED light string is changed by adjusting the resistance value of the variable resistor (VR1) to adjust the brightness of the LED light string.

[0009] Furthermore, the single chip controller is also provided with a temperature sensor module for monitoring the operating temperature of the LED light string, and the single chip controller automatically adjusts the output power according to the operating temperature to prevent the LED light string from overheating.

[0010] On the other hand, a daytime running position light control system is provided, comprising the daytime running position light control circuit as described above, the control system also comprising a vehicle electronic control unit (ECU) communicatively connected to the control circuit, the vehicle electronic control unit (ECU) detecting the vehicle operating status and sending corresponding instructions to the control circuit to instruct it to switch the operating mode; the control system also comprises an ambient light sensor for detecting external lighting conditions and transmitting information to the vehicle electronic control unit (ECU) to accurately control the lighting mode of the LED light string.

[0011] Furthermore, the vehicle electronic control unit (ECU) has a built-in algorithm, the steps of which include predicting the driver's intentions and the changing trends of ambient lighting conditions, and preparing in advance to switch the working mode of the daytime running position lights to ensure driving safety; the vehicle electronic control unit (ECU) is also equipped with a fault detection module for real-time monitoring of the operating status of the control system, and taking corresponding protective measures when an abnormality is detected.

[0012] In another aspect, a method for controlling a daytime running position lamp is provided. Using the daytime running position lamp control system as described above, the steps of the control method include:

[0013] Initializing the system, setting the position lamp to be turned on in a default state, and monitoring the daytime running lamp activation signal of the vehicle electronic control unit (ECU);

[0014] According to the daytime running light activation signal, the MOS tube (Q8) is triggered to be turned on, and when the MOS tube (Q8) is turned on, the resistor (R36) is incorporated into the dimming circuit IFB;

[0015] By adjusting the variable resistor (VR1) in the dimming circuit IFB, the current flowing through the LED light string is increased to improve the brightness of the LED light string, and when the daytime running light function is no longer needed, the MOS tube (Q8) is turned off to restore the position light mode;

[0016] The time and duration of each switch from the position light mode to the daytime running light mode are recorded and stored in a non-volatile storage medium to predict the driver's intention and the trend of changes in ambient light conditions, and prepare in advance for switching the working mode of the daytime running position light.

[0017] Furthermore, the control method further comprises: before triggering the MOS tube (Q8) to turn on, checking whether the current vehicle speed exceeds a preset threshold value V th , only when the current vehicle speed is greater than V th The control system is allowed to continue to operate only when the optimal switching time is dynamically calculated, and the calculation expression of the optimal switching time is:

[0018] Where V represents the current vehicle speed and T represents the time constant.

[0019] Furthermore, the step of adjusting the variable resistor (VR1) in the dimming circuit IFB includes dynamically adjusting the current and power to ensure that the best lighting effect can be provided under different lighting conditions. The calculation expression for dynamically adjusting the current and power is:

[0020]

[0021] Where I is the target current intensity and P is the specified power limit.

[0022] Furthermore, the control method also includes: performing a comprehensive inspection of the electrical parameters of the entire daytime running position light control system at least once every predetermined period to ensure that all components are within the normal operating range and avoid potential faults. The inspection items include monitoring of voltage parameters, current parameters and temperature parameters.

[0023] The beneficial effects of the present invention are:

[0024] The present invention provides a daytime running light position light control circuit, system and method, which realizes unified control of daytime running lights and position lights through a single chip controller, simplifies system design and reduces costs. Specifically, the present invention receives an external signal through an input port, and uses a MOS tube (Q8) to switch states according to the received daytime running light signal. When the MOS tube (Q8) is turned on, a resistor (R36) is incorporated into a dimming circuit I FB, thereby changing the current flowing into an LED light string, and realizing smooth switching from a position light mode to a daytime running light mode.

[0025] Furthermore, the present invention also introduces a capacitor (C10) and a voltage regulator diode (D15) for stabilizing the output current and protecting the MOS tube (Q8) from overvoltage damage, respectively, further improving the stability of the system. The variable resistor (VR1) in the dimming circuit I FB allows the brightness of the LED light string to be adjusted dynamically, ensuring that the best lighting effect can be provided under different lighting conditions. The temperature sensor module built into the single chip controller can monitor the operating temperature of the LED light string in real time and automatically adjust the output power to prevent overheating, thereby extending the service life of the LED light string.

[0026] Furthermore, in terms of the control system, the present invention realizes accurate detection and control of the vehicle's operating status through communication connection with the vehicle's electronic control unit (ECU). The introduction of the ambient light sensor enables the system to switch the lighting mode more accurately according to the external lighting conditions. The algorithm built into the ECU can not only predict the driver's intention and the changing trend of the ambient light conditions, prepare in advance to switch the working mode of the daytime running position lights to ensure driving safety, but also has a fault detection module to monitor the system's operating status in real time and take corresponding protective measures when abnormalities are detected, further improving the safety of the lighting system.

[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A circuit diagram of a daytime running position lamp control circuit in one embodiment of the present invention;

[0029] Figure 2 Flow chart of a control method in one embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The term "comprise" and any variation thereof in the specification and claims of the present application are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. In addition, the use of "and / or" in the specification and claims to indicate at least one of the connected objects, such as A and / or B, means including A alone, B alone, and A and B.

[0032] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0033] The present invention provides the following preferred embodiments:

[0034] Embodiment 1

[0035] In order to solve the problem of system complexity and increased cost caused by independent control of daytime running lights and position lights in traditional designs, this embodiment further optimizes the design of the daytime running position light control circuit. Specifically, this embodiment provides a daytime running position light control circuit, including an input port for receiving an external signal, at least one MOS tube Q8 connected to the input port, a resistor R36 connected in parallel between the MOS tube Q8 and the LED light string, and a single chip controller.

[0036] Furthermore, the input port is used to receive a daytime running light activation signal from the vehicle electronic control unit ECU. When the signal is received, the MOS tube Q8 will switch according to the signal state. The MOS tube Q8 adopts an N-channel enhancement field effect transistor, whose gate is connected to the input port, the source is grounded, and the drain is connected to one end of the resistor R36. When the MOS tube Q8 is turned on, the resistor R36 is incorporated into the dimming circuit I FB, thereby changing the current intensity flowing into the LED light string, and realizing a smooth switch from the position light mode to the daytime running light mode.

[0037] It is important to understand that with this design, a single chip controller is able to adjust the current intensity through the LED light string according to the state of the input port, thereby switching between the position light mode and the daytime running light mode. This not only simplifies the circuit design, but also reduces the number of electronic components required, reducing the overall cost of the system. In addition, through the centralized control of a single chip controller, it can ensure that the switching between the two modes is more rapid and coordinated, improving the responsiveness and reliability of the system.

[0038] The benefit of this embodiment is that, through the coordinated use of a single chip controller and the MOS tube Q8, unified control of the daytime running lights and the position lights is achieved, the system structure is simplified, the cost is reduced, and the response speed and reliability of the system are improved.

[0039] Embodiment 2

[0040] In order to solve the problem of MOS tube damage caused by voltage fluctuation in traditional designs, this embodiment further refines the protection measures in the daytime running position light control circuit. Specifically, this embodiment provides a daytime running position light control circuit, which includes an input port for receiving external signals, at least one MOS tube Q8 connected to the input port, a resistor R36 connected in parallel between the MOS tube Q8 and the LED light string, and a single chip controller, and also includes at least one capacitor C10 and a voltage regulator diode D15.

[0041] Furthermore, capacitor C10 is provided between the single chip controller and the LED light string to stabilize the output current. The selection of capacitor C10 can be determined according to the actual application requirements, for example, a ceramic capacitor or electrolytic capacitor with a high capacitance and a low equivalent series resistance (ESR) can be selected. The presence of capacitor C10 helps to filter out ripples and noise on the power line and improve the stability of the output current, thereby ensuring the brightness consistency and life of the LED light string.

[0042] The voltage stabilizing diode D15 is located between the gate of the MOS tube Q8 and the ground, and is used to protect the MOS tube Q8 from overvoltage damage. The type of the voltage stabilizing diode D15 should be determined according to the operating voltage range of the MOS tube Q8 to ensure that it can be quickly turned on in the case of overvoltage and discharge the excess voltage to the ground, thereby protecting the MOS tube Q8 from damage.

[0043] It can be understood that by introducing capacitor C10 and voltage stabilizing diode D15, this embodiment not only improves the stability and reliability of the system, but also prolongs the service life of MOS tube Q8. The stabilizing effect of capacitor C10 and the protection function of voltage stabilizing diode D15 are combined, so that the whole circuit can maintain good performance under various working conditions.

[0044] Through this embodiment, when the system faces voltage fluctuations and overvoltage conditions, it can effectively protect key components, improve the reliability and stability of the system, and extend the service life of the entire system.

[0045] Embodiment 3

[0046] In order to solve the problem that the brightness of the LED light string cannot be flexibly adjusted in the traditional design, the present embodiment further optimizes the design of the dimming circuit I FB. Specifically, the present embodiment provides a daytime running position light control circuit, wherein the dimming circuit I FB includes a variable resistor VR1, and the current flowing into the LED light string is changed by adjusting the resistance value of the variable resistor VR1 to adjust the brightness of the LED light string.

[0047] Further, the selection of the variable resistor VR1 should be determined according to the rated current and voltage of the LED string. Common types of variable resistors include digital potentiometers and analog potentiometers. Digital potentiometers can be precisely controlled by a microcontroller, while analog potentiometers can be adjusted manually or mechanically. In this embodiment, it is recommended to use a digital potentiometer so that it can be automatically adjusted by a single chip controller.

[0048] When the MOS tube Q8 is turned on, the resistor R36 is incorporated into the dimming circuit I FB. At this time, by adjusting the resistance of the variable resistor VR1, the current flowing into the LED light string can be changed, thereby achieving brightness adjustment. This design allows the brightness of the LED light string to be flexibly adjusted according to actual needs to meet the lighting needs under different lighting conditions.

[0049] It should be understood that by introducing the variable resistor VR1, this embodiment not only provides a flexible brightness adjustment function, but also improves the adaptability and flexibility of the system. Whether it is daytime or nighttime, whether it is sunny or cloudy, the variable resistor VR1 can be adjusted to obtain the best lighting effect, thereby improving driving safety.

[0050] Through this embodiment, the system can dynamically adjust the brightness of the LED light string according to different lighting conditions, thereby improving the adaptability and flexibility of the system and enhancing driving safety.

[0051] Embodiment 4

[0052] In order to solve the problem of shortened life of LED light strings due to overheating in traditional designs, this embodiment further optimizes the temperature monitoring and control mechanism. Specifically, this embodiment provides a daytime running position light control circuit, in which a single chip controller is also provided with a temperature sensor module for monitoring the operating temperature of the LED light string and automatically adjusting the output power according to the operating temperature to prevent the LED light string from overheating.

[0053] Furthermore, the temperature sensor module can be a temperature sensor integrated in a single chip controller or an externally mounted temperature sensor. The selection of the temperature sensor module should be determined according to the actual application requirements. For example, a digital temperature sensor with high precision and fast response characteristics can be selected. The temperature sensor module monitors the operating temperature of the LED light string in real time and feeds the data back to the single chip controller.

[0054] The single chip controller automatically adjusts the output power according to the temperature data provided by the temperature sensor module. When the operating temperature of the LED light string is detected to exceed the preset threshold, the single chip controller will reduce the output power and reduce the current flowing through the LED light string, thereby reducing the temperature of the LED light string. Conversely, when the operating temperature of the LED light string is detected to be lower than the preset threshold, the single chip controller will appropriately increase the output power to maintain appropriate brightness.

[0055] It can be understood that by introducing the temperature sensor module, this embodiment not only improves the reliability and stability of the system, but also prolongs the service life of the LED light string. The real-time monitoring and automatic adjustment functions of the temperature sensor module ensure that the LED light string can be kept within a safe operating temperature range under various working conditions, avoiding damage caused by overheating.

[0056] Through this embodiment, the system can monitor the operating temperature of the LED light string in real time, and automatically adjust the output power according to the temperature data to prevent overheating, thereby extending the service life of the LED light string and improving the reliability and stability of the system.

[0057] Embodiment 5

[0058] In order to solve the problem of untimely and inaccurate switching between the daytime running lights and the position lights in the traditional design, this embodiment further optimizes the design of the daytime running position light control system. Specifically, this embodiment provides a daytime running position light control system, including the above daytime running position light control circuit, and also including a vehicle electronic control unit ECU and an ambient light sensor that are communicatively connected to the control circuit.

[0059] Furthermore, the vehicle electronic control unit ECU is responsible for detecting the vehicle's operating status and sending corresponding instructions to the control circuit to instruct it to switch the working mode. The ECU can monitor the vehicle's speed, steering angle, braking status and other information in real time, and determine whether it is necessary to switch the working mode of the daytime running lights and position lights based on this information. For example, when the vehicle speed exceeds the preset threshold, the ECU will send a daytime running light activation signal to trigger the MOS tube Q8 to turn on, thereby switching to the daytime running light mode.

[0060] The ambient light sensor is used to detect external light conditions and transmit the information to the vehicle electronic control unit ECU. The ambient light sensor can be a photoresistor, photodiode or other type of light sensor. The ambient light sensor monitors the external light intensity in real time and feeds the data back to the ECU. The ECU decides whether to switch the working mode of the daytime running lights and position lights based on the data of the light sensor and the vehicle's operating status.

[0061] It can be understood that by introducing the vehicle electronic control unit ECU and the ambient light sensor, this embodiment not only improves the intelligence level of the system, but also enhances the response speed and accuracy of the system. The real-time monitoring and intelligent decision-making functions of the ECU, combined with the precise measurement of the ambient light sensor, enable the system to make timely and accurate lighting mode switching in various complex driving environments, thereby improving driving safety.

[0062] Through this embodiment, the system can intelligently switch the working modes of the daytime running lights and the position lights according to the vehicle's operating status and external lighting conditions, thereby improving the intelligence level and response speed of the system and enhancing driving safety.

[0063] Embodiment 6

[0064] In order to solve the problem of untimely and inaccurate switching of the daytime running position lights in the traditional design, this embodiment further optimizes the algorithm of the vehicle electronic control unit ECU. Specifically, this embodiment provides a daytime running position light control system, in which the vehicle electronic control unit ECU has a built-in algorithm, and the steps of the algorithm include predicting the driver's intention and the trend of changes in ambient light conditions, and preparing in advance to switch the working mode of the daytime running position lights to ensure driving safety; the vehicle electronic control unit ECU is also equipped with a fault detection module for real-time monitoring of the operating status of the control system and taking corresponding protective measures when an abnormality is detected.

[0065] Furthermore, the algorithm built into the ECU predicts the driver's intention by analyzing various sensor data of the vehicle, such as speed, steering angle, braking status, etc., combined with historical data and current driving behavior. For example, when the vehicle accelerates or enters a highway, the ECU can predict that the driver may need to turn on the daytime running lights, and thus send an activation signal in advance. In addition, the algorithm also predicts the changing trend of lighting conditions based on the data from the ambient light sensor. For example, on cloudy days or at dusk, the ECU can adjust the lighting mode in advance to ensure sufficient lighting before the light dims.

[0066] The fault detection module is responsible for real-time monitoring of the operating status of the entire control system. The module can determine whether the system is working properly by monitoring the electrical parameters such as voltage, current, temperature, etc. of each key component such as MOS tube Q8, resistor R36, single chip controller, etc. Once an abnormal situation such as overheating, short circuit, open circuit, etc. is detected, the fault detection module will immediately take corresponding protection measures, such as cutting off the power supply, alarm prompts, etc., to prevent further damage.

[0067] It should be understood that by introducing such intelligent algorithms and fault detection mechanisms, this embodiment not only improves the response speed and accuracy of the system, but also enhances the reliability and safety of the system. The intelligent prediction function of the ECU makes the light mode switching more timely and accurate, while the fault detection module ensures that the system can operate stably under various conditions and avoids potential fault risks.

[0068] Through this embodiment, the system can prepare and switch the working mode of the daytime running position lamp in advance according to the driver's intention and the changing trend of the ambient light conditions, thereby improving driving safety. At the same time, the introduction of the fault detection module further enhances the reliability and stability of the system, ensuring the long-term stable operation of the system.

[0069] Embodiment 7

[0070] In order to solve the problem of insufficient recording and analysis during the switching process of the daytime running position lights in the traditional design, this embodiment further refines the daytime running position light control method.

[0071] like Figure 2 As shown, the steps of the daytime running position lamp control method include:

[0072] S100, initializing the system, setting the position lamp to be turned on in the default state, and monitoring the daytime running lamp activation signal of the vehicle electronic control unit ECU;

[0073] S200, triggering the MOS tube Q8 to turn on according to the daytime running light activation signal, while turning on the MOS tube Q8, the resistor R36 is incorporated into the dimming circuit I FB;

[0074] S300, by adjusting the variable resistor VR1 in the dimming circuit I FB, the current flowing through the LED light string is increased to improve the brightness of the LED light string. When the daytime running light function is no longer needed, the MOS tube Q8 is turned off to restore the position light mode;

[0075] S400, recording the time and duration of each switch from the position light mode to the daytime running light mode, and storing them in a non-volatile storage medium, so as to predict the driver's intention and the trend of changes in ambient light conditions, and prepare in advance for switching the working mode of the daytime running position light.

[0076] Specifically, the present embodiment provides a daytime running position light control method, using the above daytime running position light control system, the steps of which include initializing the system, setting the position light to be turned on in a default state, and monitoring the daytime running light activation signal of the vehicle electronic control unit ECU; triggering the MOS tube Q8 to be turned on according to the daytime running light activation signal, and while turning on the MOS tube Q8, incorporating the resistor R36 into the dimming circuit I FB; increasing the current flowing through the LED light string by adjusting the variable resistor VR1 in the dimming circuit I FB to increase the brightness of the LED light string, and when the daytime running light function is no longer needed, turning off the MOS tube Q8 and restoring the position light mode; recording the time and duration of each switch from the position light mode to the daytime running light mode, and storing them in a non-volatile storage medium to predict the driver's intention and the trend of changes in ambient light conditions, and preparing in advance for switching the working mode of the daytime running position light.

[0077] Furthermore, when the system is initialized, the system turns on the position light mode by default. At this time, the MOS tube Q8 is in the off state, and the resistor R36 is not incorporated into the dimming circuit IFB. When the vehicle electronic control unit ECU detects that it needs to switch to the daytime running light mode, it will send a daytime running light activation signal. After receiving the signal, the MOS tube Q8 is turned on, and the resistor R36 is incorporated into the dimming circuit IFB, thereby changing the current intensity flowing into the LED light string and increasing the brightness of the LED light string. By adjusting the resistance value of the variable resistor VR1, the brightness of the LED light string can be further adjusted to adapt to different lighting conditions.

[0078] When the DRL function is no longer needed, the ECU will send a shutdown signal, the MOS tube Q8 will be turned off, the resistor R36 will be removed from the dimming circuit IFB, and the system will return to the position light mode. During this process, the system will record the time and duration of each switch from the position light mode to the DRL mode, and store these data in a non-volatile storage medium. These recorded data can be used for subsequent analysis to help predict the driver's intentions and the changing trends of ambient light conditions, so as to prepare and switch the working mode of the DRL in advance.

[0079] It is understandable that by recording and storing switching data, this embodiment not only provides a detailed system operation record, but also provides a basis for subsequent data analysis and optimization. These data can help the system more accurately predict future switching needs and improve the intelligence level and response speed of the system.

[0080] Through this embodiment, the system can record in detail the time and duration of each lighting mode switch, providing an important basis for subsequent data analysis and optimization, and improving the intelligence level and response speed of the system.

[0081] Embodiment 8

[0082] In order to solve the problem of inaccurate switching timing of the daytime running position lights in the traditional design, this embodiment further optimizes the daytime running position light control method. Specifically, this embodiment provides a daytime running position light control method, the steps of which also include: before triggering the MOS tube Q8 to turn on, checking whether the current vehicle speed exceeds the preset threshold value Vth, and only when the current vehicle speed is greater than Vth, the control system is allowed to continue to operate; dynamically calculating the best switching timing, the calculation expression of the best switching timing is:

[0083] Where V represents the current vehicle speed and T represents the time constant.

[0084] Furthermore, before triggering the MOS tube Q8 to conduct, the system first checks the current vehicle speed. If the current vehicle speed is lower than the preset threshold V th , the system will not switch. Only when the vehicle speed exceeds Vth will the system proceed to the next step. This design ensures that the light mode is not switched frequently when driving at low speed, reducing unnecessary energy consumption and system burden.

[0085] Furthermore, the expression for dynamically calculating the best switching time combines the vehicle speed and the time constant. Through this formula, the system can calculate the best switching time according to the current vehicle speed and the time constant. For example, when the vehicle accelerates, the system can calculate the appropriate switching time in advance according to the speed change trend, so as to complete the switching of the light mode before the vehicle reaches the high-speed driving state.

[0086] It should be understood that by introducing the speed check and the mechanism of dynamically calculating the best switching time, this embodiment not only improves the response speed of the system, but also enhances the intelligence level of the system. The speed check mechanism avoids frequent switching when driving at low speeds, reducing the system burden, while the formula for dynamically calculating the best switching time ensures that the most appropriate switching time can be found under different driving conditions, improving the flexibility and adaptability of the system.

[0087] Through this embodiment, the system can switch the lighting mode at an appropriate speed, and by dynamically calculating the optimal switching time, the response speed and intelligence level of the system are improved, and the flexibility and adaptability of the system are enhanced.

[0088] Embodiment 9

[0089] In order to solve the problem that the traditional design cannot provide the best lighting effect under different lighting conditions, this embodiment further optimizes the daytime running position lamp control method. Specifically, this embodiment provides a daytime running position lamp control method, wherein the step of adjusting the variable resistor VR1 in the dimming circuit IFB includes dynamically adjusting the current and power to ensure that the best lighting effect can be provided under different lighting conditions. The calculation expression for dynamically adjusting the current and power is:

[0090] Where I is the target current intensity and P is the specified power limit.

[0091] Furthermore, the process of dynamically adjusting the current and power is based on the light data provided by the ambient light sensor. The ambient light sensor monitors the external light intensity in real time and transmits the data to the vehicle electronic control unit ECU. The ECU calculates the target current intensity I and the specified power limit P based on the light data. Through the above formula, the system can dynamically adjust the resistance value of the variable resistor VR1, thereby changing the current intensity flowing into the LED light string to achieve the best lighting effect.

[0092] It is important to understand that by dynamically adjusting the current and power, the system can flexibly adjust the brightness of the LED light string according to the actual lighting conditions. Whether it is day or night, sunny or cloudy, the system can adjust the resistance value of the variable resistor VR1 to provide the lighting effect that best suits the current lighting conditions, thereby improving driving safety.

[0093] Through this embodiment, the system can dynamically adjust the current and power under different lighting conditions to provide the best lighting effect, enhance the adaptability and flexibility of the system, and improve driving safety.

[0094] Embodiment 10

[0095] In order to solve the problem of lack of regular and comprehensive inspection mechanism in traditional design, this embodiment further optimizes the daytime running position lamp control method. Specifically, this embodiment provides a daytime running position lamp control method, and the steps thereof also include performing at least one comprehensive inspection on the electrical parameters of the entire daytime running position lamp control system every predetermined period to ensure that all components are within the normal working range and avoid potential faults. The inspection items include monitoring of voltage parameters, current parameters and temperature parameters.

[0096] Furthermore, the system will automatically perform a comprehensive electrical parameter check at each predetermined period, such as every hour or every day. The check items include but are not limited to the following:

[0097] Voltage parameters: The system monitors the voltage of each key node to ensure that it is within the normal operating range, such as the voltage of the input port and the power supply voltage of a single chip controller.

[0098] Current parameters: The system monitors the current through various key components such as MOS tube Q8, resistor R36, LED light string, etc. to ensure that it is within the normal operating range. For example, the current through MOS tube Q8, the current through the LED light string, etc.

[0099] Temperature parameters: The system monitors the operating temperature of each key component to ensure that it is within the normal operating range, such as the temperature of MOS tube Q8 and the temperature of a single chip controller.

[0100] It is important to understand that by performing a comprehensive electrical parameter check on a regular basis, the system can detect and handle potential faults in a timely manner, ensuring that all components are within normal operating ranges. This regular inspection mechanism not only improves the reliability of the system, but also extends the service life of the system.

[0101] Through this embodiment, the system can regularly perform a comprehensive check on electrical parameters to ensure that all components are within the normal working range and avoid the occurrence of potential faults.

[0102] The above embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present invention should be included in the scope of protection of the present invention.

Claims

1. A daytime running position lamp control circuit, characterized in that: The invention comprises an input port for receiving an external signal; at least one MOS tube (Q8) is connected to the input port and is used to switch the state according to the received daytime running light signal; a resistor (R36) is connected in parallel between the MOS tube (Q8) and the LED light string, and when the MOS tube (Q8) is turned on, the resistor (R36) is incorporated into the dimming circuit IFB; and a single chip controller configured to adjust the current intensity through the LED light string based on the state of the input port to switch between the position light mode and the daytime running light mode.

2. The daytime running position lamp control circuit according to claim 1, characterized in that: The control circuit further comprises at least one capacitor (C10) arranged between the single chip controller and the LED light string for stabilizing the output current; a voltage stabilizing diode (D15) located between the gate of the MOS tube (Q8) and the ground for protecting the MOS tube (Q8) from overvoltage damage; the MOS tube (Q8) is an N-channel enhancement type field effect transistor, the gate of which is connected to the input port, the source is grounded, and the drain is connected to one end of the resistor (R36).

3. The daytime running position lamp control circuit according to claim 1, characterized in that: The dimming circuit IFB comprises a variable resistor (VR1), and the current flowing into the LED light string is changed by adjusting the resistance value of the variable resistor (VR1), so as to adjust the brightness of the LED light string.

4. The daytime running position lamp control circuit according to claim 1, characterized in that: The single chip controller is also provided with a temperature sensor module for monitoring the operating temperature of the LED light string. The single chip controller automatically adjusts the output power according to the operating temperature to prevent the LED light string from overheating.

5. A daytime running position light control system, comprising a daytime running position light control circuit as claimed in any one of claims 1 to 5, characterized in that: The control system also includes a vehicle electronic control unit (ECU) that is communicatively connected to the control circuit, and the vehicle electronic control unit (ECU) detects the vehicle operating status and sends corresponding instructions to the control circuit to instruct it to switch the working mode; the control system also includes an ambient light sensor for detecting external lighting conditions and transmitting information to the vehicle electronic control unit (ECU) to accurately control the lighting mode of the LED light string.

6. The daytime running position lamp control system according to claim 5, characterized in that: The vehicle electronic control unit (ECU) has a built-in algorithm, the steps of which include predicting the driver's intention and the changing trend of ambient lighting conditions, and preparing in advance to switch the working mode of the daytime running position lights to ensure driving safety; the vehicle electronic control unit (ECU) is also equipped with a fault detection module for real-time monitoring of the operating status of the control system and taking corresponding protective measures when an abnormality is detected.

7. A method for controlling a daytime running position lamp, using the daytime running position lamp control system according to any one of claims 5 to 6, characterized in that: The steps of the control method include: Initializing the system, setting the position lamp to be turned on in a default state, and monitoring the daytime running lamp activation signal of the vehicle electronic control unit (ECU); According to the daytime running light activation signal, the MOS tube (Q8) is triggered to be turned on, and when the MOS tube (Q8) is turned on, the resistor (R36) is incorporated into the dimming circuit IFB; By adjusting the variable resistor (VR1) in the dimming circuit IFB, the current flowing through the LED light string is increased to improve the brightness of the LED light string, and when the daytime running light function is no longer needed, the MOS tube (Q8) is turned off to restore the position light mode; The time and duration of each switch from the position light mode to the daytime running light mode are recorded and stored in a non-volatile storage medium to predict the driver's intention and the trend of changes in ambient light conditions, and prepare in advance for switching the working mode of the daytime running position light.

8. The method for controlling a daytime running position lamp according to claim 7, characterized in that: The control method further comprises: before triggering the MOS tube (Q8) to turn on, checking whether the current vehicle speed exceeds a preset threshold value V th , only when the current vehicle speed is greater than V th The control system is allowed to continue to operate only when the optimal switching time is dynamically calculated, and the calculation expression of the optimal switching time is: Where V represents the current vehicle speed and T represents the time constant.

9. The method for controlling a daytime running position lamp according to claim 7, characterized in that: The step of adjusting the variable resistor (VR1) in the dimming circuit IFB includes dynamically adjusting the current and power to ensure that the best lighting effect can be provided under different lighting conditions. The calculation expression for dynamically adjusting the current and power is: Where I is the target current intensity and P is the specified power limit.

10. The method for controlling a daytime running position lamp according to claim 7, characterized in that: The control method also includes: performing a comprehensive inspection of the electrical parameters of the entire daytime running position lamp control system at least once every predetermined period to ensure that all components are within a normal operating range and avoid potential faults. The inspection items include monitoring of voltage parameters, current parameters and temperature parameters.

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