A vehicle lighting control system and method that meets different light color and brightness requirements

Abstract

This invention belongs to the field of automotive technology, specifically a vehicle lighting control system and method that meets different requirements for light color and brightness. The vehicle lighting control system includes a BCM module, a voltage regulator module, a lighting control module, a front turn signal drive module, a daytime running light / front position light drive module, a fault feedback module, a front turn signal light source board, and a daytime running light / front position light source board. This invention addresses scenarios where front turn signals, daytime running lights, and front position lights are used interchangeably, achieving different light color and brightness requirements for different lighting functions, as well as the required fault alarm function for front turn signals according to regulations. Simultaneously, it employs PWM (Pulse Width Modulation) dimming to control the different brightness levels of the daytime running lights and front position lights, effectively avoiding the light color deviation caused by traditional analog dimming.

Description

Technical Field

[0001] This invention belongs to the field of automotive technology, specifically a vehicle lighting control system and method that meets different requirements for light color and brightness. Background Technology

[0002] With the evolution of automotive styling trends, headlight miniaturization has become the mainstream design approach. This has led to an increasing number of headlights adopting a multi-functional shared light-emitting area to reduce overall headlight size. The functions of the front turn signals, daytime running lights, and front position lights are increasingly being integrated into a single light-emitting area. However, the regulatory requirements for these three functions differ: front turn signals emit yellow light, while daytime running lights and front position lights emit white light. Furthermore, the luminous intensity requirements for daytime running lights and front position lights differ, and the priority of illuminating all three functions simultaneously also differs. How to effectively and concisely control these three functions remains a challenge for the industry. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a vehicle lighting control system and method that meets different requirements for light color and brightness. Specifically, for scenarios where front turn signals, daytime running lights, and front position lights are used simultaneously, it achieves different light color and brightness requirements for various lighting functions, as well as a front turn signal fault alarm function as required by regulations. Furthermore, it employs PWM (Pulse Width Modulation) dimming to control the different brightness levels of the daytime running lights and front position lights, effectively avoiding the light color deviation issues caused by traditional analog dimming.

[0004] The technical solution of this invention is described below in conjunction with the accompanying drawings:

[0005] In a first aspect, the present invention provides a vehicle lighting control system that meets different requirements for light color and brightness, comprising:

[0006] BCM module 1 is used to supply power to voltage regulator module 2, front turn signal drive module 4, and daytime running light / front position light drive module 5 when it receives a light illumination signal from the front turn signal switch, or determines that the vehicle meets the conditions for turning on the daytime running lights, or receives a light illumination signal from the front position light switch; when it receives a light deactivation signal from the front turn signal switch, or determines that the vehicle meets the conditions for turning off the daytime running lights, or receives a light deactivation signal from the front position light switch, it stops supplying power to voltage regulator module 2, front turn signal drive module 4, and daytime running light / front position light drive module 5; and when it receives a grounding signal from fault feedback module 6, it feeds back front turn signal fault information to the vehicle.

[0007] Voltage regulator module 2 is used to stabilize the input voltage of BCM module 1 and to supply power to lighting control module 3;

[0008] The lighting control module 3 is used to control the front turn signal drive module 4, the daytime running light / front position light drive module 5, the fault feedback module 6, the front turn signal light source board 7, and the daytime running light / front position light source board 8.

[0009] The front turn signal drive module 4 is used to supply power to the front turn signal light source board 7;

[0010] The daytime driving light / front position light driver module 5 is used to supply power to the daytime driving light / front position light source board 8;

[0011] The fault feedback module 6 is used to receive fault signals from the front turn signals and daytime running lights / front position lights;

[0012] The front turn signal light source board 7 is used to control the lighting or extinguishing of the yellow LED light source;

[0013] The daytime running light / front position light source board 8 is used to control the lighting or extinguishing of the white LED light source.

[0014] Furthermore, the lighting control module 3 operates as follows:

[0015] ① If two or three of the following signals are detected simultaneously from BCM module 1: daytime running light power supply status signal, front position light power supply status signal, and front turn signal power supply status signal, the lighting priority is: front turn signal ≥ daytime running light ≥ front position light.

[0016] ② After detecting the power supply status signal of the front turn signal of the BCM module 1, the MOS transistor in the front turn signal light source board 7 is turned on, so that the LED light source is connected to the front turn signal drive module 4; after 15ms, the front turn signal is sent to the front turn signal drive module 4 to turn on.

[0017] ③ Upon receiving a front turn signal fault from the front turn signal drive module 5, output a high level to the fault feedback module 6; otherwise, output a low level to the fault feedback module 6.

[0018] ④ After detecting the daytime driving light power supply status signal of BCM module 1, turn on the MOS transistor in the daytime driving light / front position light source board 7 to connect the LED light source with the daytime driving light / front position light driver module 4; after 15ms, send a daytime driving light lighting signal to the daytime driving light / front position light driver module 4.

[0019] ⑤ After detecting the power supply status signal of the front position light of BCM module 1, turn on the MOS transistor in the daytime driving light / front position light source board 7 to connect the LED light source with the daytime driving light / front position light driver module 4; after 15ms, send a front position light lighting signal to the daytime driving light / front position light driver module 4.

[0020] Furthermore, the front turn signal drive module 4 operates as follows:

[0021] ① Upon receiving the front turn signal from the lighting control module 3, the MOS transistor in the control module is turned on and off to control the power supply current to the front turn signal light source board 7;

[0022] ② The fault diagnosis module detects an abnormal voltage in the circuit, determines it as a fault, and transmits the fault status to the lighting control module 3.

[0023] Furthermore, the daytime running light / front position light drive module 5 operates as follows:

[0024] ① Upon receiving the daytime driving light illumination signal from the lighting control module 3, the MOS transistor in the control module periodically turns on and off to control the power supply current of the daytime driving light / front position light source board 8;

[0025] ② Upon receiving the front light illumination signal from the lighting control module 3, the MOS transistor in the control module periodically turns on and off to control the power supply current of the daytime driving light / front light source board 8.

[0026] Secondly, the present invention also provides a vehicle headlight control method that meets different light color and brightness requirements, implemented through a vehicle headlight control system that meets different light color and brightness requirements, comprising the following steps:

[0027] Step 1: When BCM module 1 receives the light illumination signal from the front turn signal switch, or determines that the vehicle meets the conditions for turning on the daytime running lights, or receives the light illumination signal from the front position light switch, it turns on the power supply for the front turn signals, the power supply for the daytime running lights, and the power supply for the front position lights respectively.

[0028] Step 2: The lighting control module 3 collects the power supply status. When two or three of the power supply status signals of the front turn signal, daytime running light, and front position light of the BCM module 1 are detected at the same time, the front turn signal, daytime running light, or front position light is turned on.

[0029] Step 3: After detecting the power supply status signal of the front turn signal from the BCM module 1, the lighting control module 3 controls the front turn signal light source board 7 to connect with the front turn signal drive module 4; after 15ms, it sends a front turn signal to the front turn signal drive module 4; when the front turn signal drive module 4 receives the front turn signal from the lighting control module 3, the MOS transistor in the control module turns on and off to control the power supply current of the front turn signal light source board 7.

[0030] Step 4: The fault diagnosis module in the front turn signal drive module 4 detects an abnormal voltage in the circuit, determines it as a fault, and transmits the fault status to the lighting control module 3. The lighting control module 3 outputs a high level to the fault feedback module 6; otherwise, it outputs a low level to the fault feedback module 6. The fault feedback module 6 receives a high level from the lighting control module 3, turns on the MOSFET, and grounds the input terminal of the BCM module; it receives a low level from the lighting control module 3, turns off the MOSFET, and leaves the input terminal of the BCM module 1 floating. Finally, it realizes the function of reporting the front turn signal fault or normal status to the whole vehicle.

[0031] Step 5: When the lighting control module 3 does not detect the front turn signal power supply status signal of the BCM module 1, but detects the daytime running light power supply status signal of the BCM module 1, it controls the daytime running light / front position light source board 8 to connect with the daytime running light / front position light driver module 5; after 15ms, it sends a daytime running light illumination signal to the daytime running light / front position light driver module 5; when the daytime running light / front position light driver module 5 receives the daytime running light illumination signal from the lighting control module 3, the MOSFET in the control module periodically turns on and off to control the power supply current of the daytime running light / front position light source board 8;

[0032] Step Six: When the lighting control module 3 does not detect the power supply status signal of the front turn signal and the power supply status signal of the daytime running light of the BCM module 1, but detects the power supply status signal of the front position light of the BCM module 1, it controls the daytime running light / front position light source board 8 to connect with the daytime running light / front position light driver module 5; after 15ms, it sends a front position light ignition signal to the daytime running light / front position light driver module 5; when the daytime running light / front position light driver module 5 receives the front position light ignition signal from the lighting control module 3, the MOSFET in the control module periodically turns on and off to control the power supply current of the daytime running light / front position light source board 8.

[0033] Furthermore, the lighting priority is: front turn signal ≥ daytime running light ≥ front position light.

[0034] Furthermore, the control of the power supply current to the front turn signal light source board 7 is manifested in the front turn signal emitting yellow light.

[0035] Furthermore, the daytime driving light / front position light driver module 5 receives the daytime driving light illumination signal from the lighting control module 3 and controls the power supply current of the daytime driving light / front position light source board 8 to achieve PWM dimming with a frequency of 230Hz and a duty cycle of 40%, resulting in a high-brightness white light emission state for the daytime driving lights.

[0036] Furthermore, the daytime driving light / front position light driver module 5 receives the front position light illumination signal from the lighting control module 3 and controls the power supply current of the daytime driving light / front position light source board 8 to achieve PWM dimming with a frequency of 230Hz and a duty cycle of 5%, which manifests as a low-brightness white light emission state for the front position lights.

[0037] The beneficial effects of this invention are as follows:

[0038] This invention addresses scenarios where front turn signals, daytime running lights, and front position lights are used interchangeably. It enables the fulfillment of different light function requirements regarding color and brightness, as well as the regulatory-required front turn signal fault alarm function. Simultaneously, it employs PWM (Pulse Width Modulation) dimming to control the different brightness levels of the daytime running lights and front position lights, effectively avoiding the color deviation issues associated with traditional analog dimming. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of a vehicle lighting control system that meets different light color and brightness requirements according to the present invention;

[0041] Figure 2 This is a flowchart illustrating a vehicle headlight control method that satisfies different light color and brightness requirements according to the present invention.

[0042] Figure 3 This is a schematic diagram of the fault feedback module.

[0043] In the picture:

[0044] 1. BCM module; 2. Voltage regulator module; 3. Lighting control module; 4. Front turn signal driver module; 5. Daytime running light / front position light driver module; 6. Fault feedback module; 7. Front turn signal light source board; 8. Daytime running light / front position light source board. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0046] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] Example 1

[0048] See Figure 1 An embodiment of the present invention provides a vehicle lighting control system that meets different light color and brightness requirements, comprising:

[0049] BCM module 1 is used to supply power to voltage regulator module 2, front turn signal drive module 4, and daytime running light / front position light drive module 5 when it receives a light illumination signal from the front turn signal switch, or determines that the vehicle meets the conditions for turning on the daytime running lights, or receives a light illumination signal from the front position light switch; when it receives a light deactivation signal from the front turn signal switch, or determines that the vehicle meets the conditions for turning off the daytime running lights, or receives a light deactivation signal from the front position light switch, it stops supplying power to voltage regulator module 2, front turn signal drive module 4, and daytime running light / front position light drive module 5; and when it receives a grounding signal from fault feedback module 6, it feeds back front turn signal fault information to the vehicle.

[0050] The voltage regulator module 2 is used to stabilize the 13.5V input voltage of the BCM module 1 to 5V and to supply power to the lighting control module 3;

[0051] The lighting control module 3 is used to control the front turn signal drive module 4, the daytime running light / front position light drive module 5, the fault feedback module 6, the front turn signal light source board 7, and the daytime running light / front position light source board 8.

[0052] The lighting control module 3 operates as follows:

[0053] ① If two or three of the following signals are detected simultaneously from BCM module 1: daytime running light power supply status signal, front position light power supply status signal, and front turn signal power supply status signal, the lighting priority is: front turn signal ≥ daytime running light ≥ front position light.

[0054] ② After detecting the power supply status signal of the front turn signal of the BCM module 1, the MOS transistor in the front turn signal light source board 7 is turned on, so that the LED light source is connected to the front turn signal drive module 4; after 15ms, the front turn signal is sent to the front turn signal drive module 4 to turn on.

[0055] ③ Upon receiving a front turn signal fault from the front turn signal drive module 5, output a high level to the fault feedback module 6; otherwise, output a low level to the fault feedback module 6.

[0056] ④ After detecting the daytime driving light power supply status signal of BCM module 1, turn on the MOS transistor in the daytime driving light / front position light source board 7 to connect the LED light source with the daytime driving light / front position light driver module 4; after 15ms, send a daytime driving light lighting signal to the daytime driving light / front position light driver module 4.

[0057] ⑤ After detecting the power supply status signal of the front position light of BCM module 1, turn on the MOS transistor in the daytime driving light / front position light source board 7 to connect the LED light source with the daytime driving light / front position light driver module 4; after 15ms, send a front position light lighting signal to the daytime driving light / front position light driver module 4.

[0058] The front turn signal drive module 4 is equipped with a fault diagnosis module, which is used to supply power to the front turn signal light source board 7;

[0059] The front turn signal drive module 4 operates as follows:

[0060] ① Upon receiving the front turn signal from the lighting control module 3, the MOS transistor in the control module is turned on and off to control the power supply current to the front turn signal light source board 7;

[0061] ② The fault diagnosis module detects an abnormal voltage in the circuit, determines it as a fault, and transmits the fault status to the lighting control module 3.

[0062] The daytime driving light / front position light driver module 5 is used to supply power to the daytime driving light / front position light source board 8;

[0063] The daytime driving light / front position light drive module 5 operates as follows:

[0064] ① Upon receiving the daytime driving light illumination signal from the lighting control module 3, the MOS transistor in the control module periodically turns on and off to control the power supply current of the daytime driving light / front position light source board 8, thereby achieving PWM dimming with a frequency of 230Hz and a duty cycle of 40%.

[0065] ② Upon receiving the front light illumination signal from the lighting control module 3, the MOS transistor in the control module periodically turns on and off to control the power supply current of the daytime driving light / front light source board 8, thereby achieving PWM dimming with a frequency of 230Hz and a duty cycle of 5%.

[0066] See Figure 3 The fault feedback module 6 is used to receive a high level from the lighting control module 3, turn on the MOSFET, and ground the input terminal of the BCM module; and to receive a low level from the lighting control module 3, turn off the MOSFET, and leave the input terminal of the BCM module floating.

[0067] The front turn signal light source board 7 is used to control the current state according to the front turn signal drive module 4 (with fault diagnosis module) to realize the lighting or extinguishing of the yellow LED light source, which is manifested as the yellow light emission state of the front turn signal.

[0068] The daytime driving light / front position light source board 8 is used to turn on or off the white LED light source according to the control current state of the daytime driving light / front position light drive module 5, which manifests as a high-brightness white light emission state for the daytime driving lights or a low-brightness white light emission state for the front position lights.

[0069] Example 2

[0070] See Figure 2 This invention provides a vehicle headlight control method that meets different light color and brightness requirements. It is implemented through a vehicle headlight control system that meets these requirements, and is characterized by the following steps:

[0071] S10. When BCM module 1 receives the light illumination signal from the front turn signal switch, or determines that the vehicle meets the conditions for turning on the daytime running lights, or receives the light illumination signal from the front position light switch, it respectively turns on the power supply for the front turn signals, the power supply for the daytime running lights, and the power supply for the front position lights.

[0072] S20. The lighting control module 3 collects the power supply status. When two or three of the power supply status signals of the front turn signal, daytime running light, and front position light of the BCM module 1 are detected at the same time, the lighting priority is front turn signal ≥ daytime running light ≥ front position light.

[0073] S30. After detecting the front turn signal power supply status signal from BCM module 1, the lighting control module 3 controls the front turn signal light source board 7 to connect with the front turn signal drive module 4 (with fault diagnosis module); 15ms later, it sends a front turn signal to the front turn signal drive module 4 (with fault diagnosis module). Upon receiving the front turn signal from the lighting control module 3, the front turn signal drive module 4 (with fault diagnosis module) controls the power supply current to the front turn signal light source board 7 by switching the MOSFET on and off. This results in the front turn signal emitting a yellow light.

[0074] S40, the fault diagnosis module in the front turn signal drive module 4 (with fault diagnosis module) detects an abnormal voltage in the circuit, determines it as a fault, and transmits the fault status to the lighting control module 3. The lighting control module 3 outputs a high level to the fault feedback module 6; otherwise, it outputs a low level to the fault feedback module 6. The fault feedback module 6, upon receiving a high level from the lighting control module 3, turns on the MOSFET, grounding the BCM module input; upon receiving a low level from the lighting control module 3, turns off the MOSFET, leaving the BCM module input floating. Ultimately, this achieves the function of reporting the front turn signal fault or normal status to the entire vehicle.

[0075] S50. The lighting control module 3 does not detect the front turn signal power supply status signal from the BCM module 1. However, after detecting the daytime running light power supply status signal from the BCM module 1, it controls the daytime running light / front position light source board 8 to connect with the daytime running light / front position light driver module 5. After 15ms, it sends a daytime running light illumination signal to the daytime running light / front position light driver module 5. Upon receiving the daytime running light illumination signal from the lighting control module 3, the daytime running light / front position light driver module 5 periodically turns the MOSFET in its control module on and off to control the power supply current to the daytime running light / front position light source board 8, achieving PWM dimming at a frequency of 230Hz and a duty cycle of 40%, resulting in a high-brightness white daytime running light emission state.

[0076] S60. The lighting control module 3 does not detect the power supply status signals for the front turn signals and daytime running lights from the BCM module 1. However, after detecting the power supply status signal for the front position lights from the BCM module 1, it controls the daytime running light / front position light source board 8 to connect with the daytime running light / front position light driver module 5. After 15ms, it sends a front position light illumination signal to the daytime running light / front position light driver module 5. Upon receiving the front position light illumination signal from the lighting control module 3, the daytime running light / front position light driver module 5 periodically turns the MOSFET in the control module on and off to control the power supply current to the daytime running light / front position light source board 8, achieving PWM dimming at a frequency of 230Hz and a duty cycle of 5%, resulting in a low-brightness white light emission state for the front position lights.

[0077] In summary, this invention addresses the scenario of multiplexing front turn signals, daytime running lights, and front position lights, enabling the fulfillment of different light function requirements in terms of color and brightness, as well as the regulatory requirement for front turn signal fault alarm functionality. Furthermore, it employs PWM (Pulse Width Modulation) dimming to control the different brightness levels of the daytime running lights and front position lights, effectively avoiding the color deviation issues associated with traditional analog dimming.

[0078] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the invention. Further modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A vehicle lighting control system that meets different light color and brightness requirements, characterized in that, include: The BCM module (1) is used to turn on the power supply to the voltage regulator module (2), the front turn signal drive module (4), and the daytime driving light / front position light drive module (5) when it receives the light-on signal from the front turn signal switch, or determines that the vehicle meets the conditions for turning on the daytime driving lights, or receives the light-on signal from the front position light switch; when it receives the light-off signal from the front turn signal switch, or determines that the vehicle meets the conditions for turning off the daytime driving lights, or receives the light-off signal from the front position light switch, it stops supplying power to the voltage regulator module (2), the front turn signal drive module (4), and the daytime driving light / front position light drive module (5); and when it receives the grounding signal from the fault feedback module (6), it feeds back the front turn signal fault information to the vehicle. The voltage regulator module (2) is used to stabilize the voltage input to the BCM (1) and to supply power to the lighting control module (3); The lighting control module (3) is used to control the front turn signal drive module (4), the daytime driving light / front position light drive module (5), the fault feedback module (6), the front turn signal light source board (7), and the daytime driving light / front position light source board (8). The front turn signal drive module (4) is used to supply power to the front turn signal light source board (7); The daytime driving light / front position light drive module (5) is used to supply power to the daytime driving light / front position light source board (8); The fault feedback module (6) is used to receive fault signals from the front turn signal and daytime running light / front position light; The front turn signal light source board (7) is used to control the lighting or extinguishing of the yellow LED light source; The daytime driving light / front position light source board (8) is used to control the white LED light source to turn on or off; The lighting control module (3) operates as follows: ① If two or three of the following signals are detected simultaneously: the daytime running light power supply status signal, the front position light power supply status signal, and the front turn signal power supply status signal of the BCM module (1), the lighting priority is front turn signal ≥ daytime running light ≥ front position light; ② After detecting the power supply status signal of the front turn signal of the BCM module (1), turn on the MOS tube in the front turn signal light source board (7) to connect the LED light source with the front turn signal drive module (4); after 15ms, send a front turn signal to the front turn signal drive module (4); ③ Upon receiving a front turn signal fault signal from the front turn signal drive module (5), output a high level to the fault feedback module (6); otherwise, output a low level to the fault feedback module (6). ④ After detecting the daytime driving light power supply status signal of the BCM module (1), turn on the MOS transistor in the daytime driving light / front position light source board (7) to connect the LED light source with the daytime driving light / front position light driver module (4); after 15ms, send a daytime driving light lighting signal to the daytime driving light / front position light driver module (4); ⑤ After detecting the power supply status signal of the front position lamp of the BCM module (1), turn on the MOS tube in the daytime driving lamp / front position lamp light source board (7) to connect the LED light source with the daytime driving lamp / front position lamp drive module (4); after 15ms, send the front position lamp lighting signal to the daytime driving lamp / front position lamp drive module (4); The front turn signal drive module (4) operates as follows: ① Upon receiving the front turn signal from the lighting control module (3), the MOS transistor in the control module is turned on and off to control the power supply current of the front turn signal light source board 7; ② The fault diagnosis module detects an abnormal voltage in the circuit, determines it as a fault, and transmits the fault status to the lighting control module (3). The daytime running light / front position light drive module (5) operates as follows: ① Upon receiving the daytime driving light illumination signal from the lighting control module 3, the MOS transistor in the control module periodically turns on and off to control the power supply current of the daytime driving light / front position light source board (8); ② Upon receiving the front light illumination signal from the lighting control module (3), the MOS transistor in the control module periodically turns on and off to control the power supply current of the daytime driving light / front light source board (8).

2. A vehicle headlight control method that satisfies different light color and brightness requirements, implemented by the vehicle headlight control system that satisfies different light color and brightness requirements as described in claim 1, characterized in that... Includes the following steps: Step 1: When the BCM module (1) receives the light illumination signal from the front turn signal switch, or determines that the vehicle meets the conditions for opening the daytime driving lights, or receives the light illumination signal from the front position light switch, it respectively turns on the power supply for the front turn signal, the power supply for the daytime driving lights, and the power supply for the front position lights. Step 2: The lighting control module (3) collects the power supply status. When two or three of the following signals are detected simultaneously from the BCM module (1): the front turn signal power supply status signal, the daytime running light power supply status signal, and the front position light power supply status signal, the front turn signal, daytime running light, or front position light is turned on. Step 3: After the lighting control module (3) detects the front turn signal power supply status signal of the BCM module (1), it controls the front turn signal light source board (7) to connect with the front turn signal drive module (4); after 15ms, it sends a front turn signal to the front turn signal drive module (4); the front turn signal drive module (4) receives the front turn signal from the lighting control module 3, and the MOS transistor in the control module turns on and off to control the power supply current of the front turn signal light source board 7; Step 4: The fault diagnosis module in the front turn signal drive module (4) detects an abnormal voltage in the circuit and judges it as a fault. It will transmit the fault status to the lighting control module (3). The lighting control module (3) outputs a high level to the fault feedback module (6); otherwise, it outputs a low level to the fault feedback module (6). The fault feedback module (6) receives the high level from the lighting control module (3), turns on the MOS transistor, and grounds the input terminal of the BCM module. It receives the low level from the lighting control module (3), turns off the MOS transistor, and leaves the input terminal of the BCM module (1) floating. Finally, it realizes the function of reporting the front turn signal fault or normal status to the whole vehicle. Step 5: When the lighting control module (3) does not detect the power supply status signal of the front turn signal of the BCM module (1), and detects the power supply status signal of the daytime running light of the BCM module (1), it controls the daytime running light / front position light source board (8) to connect with the daytime running light / front position light drive module (5); after 15ms, it sends a daytime running light lighting signal to the daytime running light / front position light drive module (5); when the daytime running light / front position light drive module (5) receives the daytime running light lighting signal from the lighting control module (3), the MOS transistor in the control module periodically turns on and off to control the power supply current of the daytime running light / front position light source board (8); Step 6: When the lighting control module (3) does not detect the power supply status signal of the front turn signal and the power supply status signal of the daytime running light of the BCM module (1), and detects the power supply status signal of the front position light of the BCM module (1), it controls the daytime running light / front position light source board (8) to connect with the daytime running light / front position light drive module (5); after 15ms, it sends a front position light lighting signal to the daytime running light / front position light drive module (5); when the daytime running light / front position light drive module (5) receives the front position light lighting signal from the lighting control module (3), the MOS transistor in the control module periodically turns on and off to control the power supply current of the daytime running light / front position light source board (8); The lighting priority is: front turn signal ≥ daytime running light ≥ front position light; The control of the power supply current of the front turn signal light source board (7) is manifested as the front turn signal light emitting yellow light. The daytime driving light / front position light drive module (5) receives the daytime driving light lighting signal from the lighting control module (3) and controls the power supply current of the daytime driving light / front position light source board (8) to achieve PWM dimming with a frequency of 230Hz and a duty cycle of 40%, which manifests as a high-brightness white light emission state of the daytime driving light. The daytime driving light / front position light drive module (5) receives the front position light lighting signal from the lighting control module (3) and controls the power supply current of the daytime driving light / front position light source board (8) to achieve PWM dimming with a frequency of 230Hz and a duty cycle of 5%, which manifests as a low-brightness white light emission state of the front position light.

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