LED driving system based on CAN FDL transceiver

Abstract

The embodiment of the utility model discloses an LED driving system based on CAN FDL transceivers, comprising a light control unit, a light driving unit and a lamp assembly, the light control unit comprises a first control unit and a first CAN FDL transceiver, and the light driving unit comprises a second CAN FDL transceiver; the first control unit is connected with the first CAN FDL transceiver; the second control unit is connected with the second CAN FDL transceiver; the first CAN FDL transceiver is connected with the second CAN FDL transceiver, and the light driving unit is connected with the lamp assembly. By implementing the system provided by the embodiment of the utility model, the cost, the volume and the development cycle of the controller can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to LED drive system technical field especially based on CAN FDL transceiver's LED drive system. BACKGROUND

[0002] In the prior art, LCU (Lighting Control Unit) is responsible for sending lighting signals to LDM (LED Driving Module). When the SBC (Serial Bus Controller) of LDM receives the CAN message, it will pass the information to the control unit. The control unit determines whether a specific function needs to be executed according to the received information, and controls the corresponding driver to turn on the output, thereby lighting the LED.

[0003] However, the prior art faces several significant problems. First, each controller needs to be equipped with hardware components such as control units and SBCs for logical processing, which leads to a significant increase in hardware costs. Second, since each controller needs to be developed with corresponding software, not only does it increase the development complexity, but it also prolongs the development cycle. In addition, the integration of multiple components in the controller increases the overall size, which to some extent limits the flexibility of the design.

[0004] Therefore, it is necessary to design a new system to reduce the cost, size and development cycle of the controller. SUMMARY

[0005] The utility model aims at overcoming the defects of prior art, and provides LED drive system based on CAN FDL transceiver.

[0006] To solve the above technical problems, the utility model aims to realize the following technical scheme: provide LED drive system based on CAN FDL transceiver, including: lighting control unit, lighting drive unit and lamp assembly, the lighting control unit includes first control unit and first CAN FDL transceiver, the lighting drive unit includes second CAN FDL transceiver;The first control unit is connected with the first CAN FDL transceiver;The second control unit is connected with the second CAN FDL transceiver;The first CAN FDL transceiver is connected with the second CAN FDL transceiver, and the lighting drive unit is connected with the lamp assembly.

[0007] Its further technical scheme is that the lighting control unit further includes a first electrostatic discharge protection module, and the first electrostatic discharge protection module is connected with the first control unit.

[0008] A further technical scheme is that the light control unit further comprises an SBC module, and the SBC module is connected with the first control unit.

[0009] A further technical scheme is that the light driving unit comprises a plurality of power management modules and a boost module, the boost module is connected with the power management modules, and the power management modules are connected with the light assembly.

[0010] A further technical scheme is that the light driving unit further comprises a second electrostatic discharge protection module, and the second electrostatic discharge protection module is connected with the boost module.

[0011] A further technical scheme is that the light driving unit further comprises a motor driving module and a high-side driving module, the motor driving module and the high-side driving module are respectively connected with the light assembly, and the motor driving module and the high-side driving module are respectively connected with the boost module.

[0012] A further technical scheme is that the light driving unit further comprises an ADC acquisition module, and the ADC acquisition module is connected with the second CAN FDL transceiver and the light assembly.

[0013] A further technical scheme is that the light driving unit further comprises an LDO module, and the LDO module is connected with the light assembly and the second CAN FDL transceiver.

[0014] A further technical scheme is that the second CAN FDL transceiver is integrated with a UART module and an SPI / I2C module.

[0015] A further technical scheme is that the light assembly comprises an acquisition circuit, and the acquisition circuit is connected with the ADC acquisition module.

[0016] The utility model discloses a light control unit, light driving unit and light assembly are set up, and the light control unit is composed of the first control unit and the first CAN FDL transceiver, is responsible for and the second CAN FDL transceiver of light driving unit's connection, and this system simplifies control logic, realizes more efficient light management, realizes the control unit of LDM under the premise of following the existing LED drive and motor drive chip, concentrates the control algorithm that originally dispersed in LCU and LDM all in light control unit, reduces the use of MCU and SBC in headlamp control architecture, reduces hardware cost, shortens development cycle.

[0017] The utility model will be further described in connection with the drawings and specific embodiment. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the premise of not paying creative labor.

[0019] Figure 1 The schematic block diagram of the LED driving system based on the CAN FDL transceiver provided by the present application is shown in the figure.

[0020] The figure identification is shown in the figure:

[0021] 10, light control unit; 20, light driving unit; 30, lamp assembly. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] It should be understood that when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0024] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0025] It should be further understood that the term "and / or" used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0026] In the prior art, a light control module is responsible for sending a lighting signal to an LED drive module. A serial bus controller of the LED drive module receives a CAN message and transmits information to a control unit. The control unit determines whether to perform a specific function and controls a driver to light up an LED. This technology faces problems such as high hardware cost, increased development complexity, and prolonged development cycle. In addition, the integration of multiple components leads to an increase in overall size, limiting design flexibility.

[0027] To this end, an embodiment of the present application provides an LED drive system based on a CAN FDL transceiver to reduce the cost, size, and development cycle of the controller.

[0028] Specifically, the system first CAN FDL transceiver and second CAN FDL transceiver, on the basis of retaining the existing DCDC drive and motor drive module, realize the MCU-free of LDM, thereby reducing the size and weight of LDM, and reducing the hardware cost. Through the communication conversion module and GPIO module provided by the CAN FDL transceiver, the control of the control unit on each module in the original LDM is replaced, and remote control of the LCU on the control unit is realized. This improvement concentrates the software algorithm of the headlight in the LCU, reduces the software development cost, facilitates software version management, and shortens the development cycle of the project.

[0029] In order to better understand the above technical solutions, the above technical solutions will be described in detail in conjunction with the drawings in the specification and specific embodiments.

[0030] Please refer to Figure 1 , the LED drive system based on the CAN FDL transceiver, comprising: a light control unit 10, a light drive unit 20 and a lamp assembly 30, the light control unit 10 comprising a first control unit and a first CAN FDL transceiver, the light drive unit 20 comprising a second CAN FDL transceiver; the first control unit is connected with the first CAN FDL transceiver; the second control unit is connected with the second CAN FDL transceiver; the first CAN FDL transceiver is connected with the second CAN FDL transceiver, the light drive unit 20 is connected with the lamp assembly 30.

[0031] In this embodiment, the first CAN FDL transceiver is but not limited to TCAN4562-Q1; the model of the second CAN FDL transceiver is but not limited to TCAN5102-Q1.

[0032] Specifically, the system sends control signals through the light control unit 10, which are transmitted to the second CAN FDL transceiver of the light driving unit 20 by the first CAN FDL transceiver. The second CAN FDL transceiver then delivers the instructions to the light assembly 30. This link ensures efficient transmission and real-time response of control signals. Separating the control unit from the driving unit helps reduce system complexity.

[0033] The entire control algorithm uses existing algorithms, which are not described here. The system of the present embodiment mainly uses a dedicated CAN FDL transceiver to replace the MCU, reducing hardware costs and design difficulty. The CAN FDL transceiver provides stable communication, ensuring the real-time and reliability of the light system. The system design allows different types of transceivers to be replaced or upgraded as needed, increasing the adaptability of the design. Centralizing the algorithm in the control unit simplifies software development and version management, shortening the project development cycle.

[0034] In an embodiment, referring to Figure 1 The light control unit 10 described above also includes a first electrostatic discharge protection module connected to the first control unit. The first electrostatic discharge protection module provides anti-static protection and filter for the input power supply, ensuring the stability and safety of the power supply

[0035] In an embodiment, referring to Figure 1 The light control unit 10 described above also includes an SBC module connected to the first control unit. The SBC module transmits and receives CAN FD messages; powers the first control unit; powers the first CAN FDL transceiver; monitors the status of the first control unit as an external watchdog; and the first control unit determines the function state of the message through the SCAN control LED driving (BOOST and BUCK) and motor driving modules

[0036] The first CAN FDL transceiver converts the SPI signals sent by the first control unit into CAN FDL signals and sends them to the second CAN FDL transceiver.

[0037] Specifically, the first electrostatic discharge protection module provides anti-static protection and filter for the input power supply, ensuring the stability and safety of the power supply. This reduces the potential damage of static electricity to system components and extends the service life of the equipment.

[0038] The SBC module is responsible for transmitting and receiving CAN FD messages and powering the first control unit and the first CAN FDL transceiver. This design ensures the stability and efficiency of communication, allowing for fast data processing and improving the response speed of the system.

[0039] The SBC module serves as an external watchdog, enabling real-time monitoring of the first control unit's status. This facilitates timely detection and handling of potential faults, enhancing the system's reliability.

[0040] The first control unit can determine the functional status based on received messages and control the LED drive (BOOST and BUCK) and motor drive modules via SCAN, enabling precise control over lighting and other devices. This enhances the system's flexibility and intelligence.

[0041] Integrating multiple functions into the SBC module simplifies overall design, reduces the need for external components, and lowers hardware costs and system complexity.

[0042] By integrating control, monitoring, and communication functions into the same module, the system's overall integration is improved, making design and maintenance more convenient.

[0043] Overall, this design not only enhances the system's performance and safety but also increases its flexibility and maintainability, laying a solid foundation for future expansion and upgrades.

[0044] In an embodiment, referring to Figure 1 The aforementioned light drive unit 20 includes several power management modules and a boost module. The boost module is connected to the power management modules, and the power management modules are connected to the light assembly 30.

[0045] In an embodiment, referring to Figure 1 The aforementioned light drive unit 20 also includes a second electrostatic discharge protection module, which is connected to the boost module.

[0046] In an embodiment, referring to Figure 1 The aforementioned light drive unit 20 also includes a motor drive module and a high-side drive module, both of which are connected to the light assembly 30. The motor drive module and the high-side drive module are connected to the boost module.

[0047] In an embodiment, referring to Figure 1 The aforementioned light drive unit 20 also includes an ADC acquisition module, which is connected to the second CAN FDL transceiver and the light assembly 30.

[0048] In an embodiment, referring to Figure 1 The aforementioned light drive unit 20 also includes an LDO module, which is connected to the light assembly 30 and the second CAN FDL transceiver.

[0049] In an embodiment, referring to Figure 1The second CAN FDL transceiver integrates a UART module and an SPI / I2C module.

[0050] Specifically, the second electrostatic discharge protection module provides anti-static protection and filtering for the input power supply. This ensures the stability and safety of the power supply, prevents damage to system components caused by static electricity, and prolongs the service life of the device.

[0051] The LDO module, which stands for Low Dropout Linear Regulator, provides 5V power supply for the second CAN FDL transceiver, UART, and matrix chip. This ensures that each module operates under stable voltage, improving the reliability of the system and providing a foundation for subsequent signal processing.

[0052] The second CAN FDL transceiver integrates a UART and SPI / I2C module, which is used to convert the received CAN FDL signal into other signals. This allows efficient communication between different modules, enhancing the system's collaborative working ability. The SPI module enables cross-controller communication between the LCU and DCDC, Motor Driver, and HSD modules, while the UART module allows data exchange with the lamp assembly 30, simplifying the overall architecture.

[0053] The light driving unit 20 also includes general-purpose input / output ports, or GPIO ports, which enable control of various modules such as enabling, chip selection, and sampling operations. Through these GPIO interfaces, the functions of the original control unit in the LDM can be replaced, reducing hardware requirements and design complexity. The boost module boosts the input power supply to provide power for the BCUK module.

[0054] The boost module provides necessary voltage support to ensure stable operation of the BCUK module and improve the overall performance of the system.

[0055] The BCUK module is actually a buck module that outputs a constant current power supply to power the LED at the Lamp end. This ensures constant brightness and stability of the LED lamp, improving the user experience of the light source and prolonging the life of the LED.

[0056] The motor drive module, which is also known as the high-side drive module, powers the fan. This ensures that the fan can work stably when needed, maintaining temperature management of the system and avoiding overheating.

[0057] The motor drive module is used to drive the stepper motor. It provides precise motion control and supports motor driving requirements in various application scenarios, improving the flexibility of the device.

[0058] The ADC acquisition module, which is also known as an analog-to-digital converter, acquires BIN and NTC information. It monitors the system status in real time, provides feedback information, ensures the adaptability of the system in different working environments, and improves the intelligent level of the system.

[0059] By integrating multiple functional modules, the need for external components is reduced, reducing hardware costs; the logic processing of the control unit in the LDM is reduced, reducing the complexity of software development and saving development costs; through efficient communication and control between modules, the flexibility and scalability of the overall system are enhanced; the use of static protection and stable power supply scheme improves the reliability and safety of the system, ensuring long-term stable operation.

[0060] With such a modular design, not only the system performance is improved, but also a solid foundation is laid for future expansion and upgrade.

[0061] In an embodiment, please refer to Figure 1 The lamp assembly 30 described above includes a collection circuit connected with an ADC collection module. The collection circuit includes a BIN resistor for identifying the current size required to be output by the channel, and an NTC for identifying the temperature of the lamp panel; the lamp assembly 30 also includes a SCAN for converting the received CAN FDL signal into a UART signal and transmitting it to the matrix chip.

[0062] The lamp assembly 30 described above also includes a low beam, a high beam, a matrix chip, a position lamp, a daytime running lamp, a turn signal, an angle lamp, a fog lamp, a fan, and a motor; wherein the matrix chip is used to control the functions of single or several LED with high precision, such as ADB module, turn signal, position lamp, etc.

[0063] In this embodiment, the system described above is mainly responsible for controlling the vehicle lights, motors and fans, and the specific working process is as follows:

[0064] Light control

[0065] The SBC module of the light control unit 10 receives the message from the CAN FD and transmits it to the first control unit.

[0066] The first control unit reads the BIN value collected by the ADC collection module according to the function judgment to determine the required current output.

[0067] The first control unit sends the current value required by the boost module and the BUCK module to the first CAN FDL transceiver through SPI.

[0068] The first CAN FDL transceiver converts the SPI signal into a CAN FDL signal and sends it to the second CAN FDL transceiver.

[0069] The second CAN FDL transceiver enables the boost module and the BUCK module through GPIO, performs chip selection operation, then converts the CAN FDL signal into an SPI signal, writes it into the corresponding module register, and lights up the LED.

[0070] If you need to achieve effects such as turning on and off, the first control unit sends LMM control information to the LDM end SCAN through the first CAN FDL transceiver after opening the channel, and then converts it into a UART signal and transmits it to the UART transceiver on the light board to control the switch of the matrix chip and adjust the lighting effect.

[0071] Motor Control:

[0072] The SBC module of the lighting control unit 10 receives the CAN FD message and forwards it to the first control unit.

[0073] The first control unit determines the height that the motor needs to be adjusted, and sends the relevant output value of the Motor Driver module to the first CAN FDL transceiver via SPI.

[0074] The first CAN FDL transceiver converts the SPI signal into a CAN FDL signal, and sends the signal to the second CAN FDL transceiver.

[0075] The second CAN FDL transceiver configures the Motor Driver module through GPIO and writes the height to be adjusted through SPI to drive the motor to the specified position.

[0076] Fan Control:

[0077] The first control unit reads the lamp board temperature monitored by the ADC acquisition module through the first CAN FDL transceiver and the second CAN FDL transceiver to determine whether it is too high.

[0078] The first control unit sends the output value required by the HSD module to the first CAN FDL transceiver through the SPI.

[0079] The first CAN FDL transceiver converts the SPI signal into a CAN FDL signal and transmits it to the second CAN FDL transceiver.

[0080] The second CAN FDL transceiver configures the HSD module through GPIO and uses SPI to open the power supply channel of the fan to achieve heat dissipation.

[0081] The system in this embodiment precisely controls light brightness and motor height, ensuring visibility and vehicle stability during nighttime driving and reducing accident risks. The system monitors and adjusts the status of lights, motors, and fans in real time, providing intelligent responses and enhancing the user experience. Fan control ensures the lighting module operates at an optimal temperature, extending component life and reducing failure rates. Dynamic adjustment of lighting and fan operation optimizes energy use, reduces consumption, and meets environmental requirements. The system's modular design makes troubleshooting more efficient, helping to quickly locate problems and reduce maintenance time.

[0082] The LED driving system based on CAN FDL transceiver above, by setting light control unit 10, light driving unit 20 and lamp assembly 30, light control unit 10 is composed of first control unit and first CAN FDL transceiver, responsible for connecting with the second CAN FDL transceiver of light driving unit 20, this system simplifies control logic, realizes more efficient light management, realizes the de-control unit of LDM under the premise of using existing LED driving and motor driving chip, the control algorithm originally dispersed in LCU and LDM is all concentrated in light control unit 10, reduces the use of MCU and SBC in headlamp control architecture, reduces hardware cost, shortens development cycle.

[0083] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. LED driving system based on CAN FDL transceiver, characterized in that, The application relates to a lamp control unit, a lamp driving unit and a lamp assembly, wherein the lamp control unit comprises a first control unit and a first CAN FDL transceiver, the lamp driving unit comprises a second CAN FDL transceiver; the first control unit is connected with the first CAN FDL transceiver; a second control unit is connected with the second CAN FDL transceiver; the first CAN FDL transceiver is connected with the second CAN FDL transceiver; the lamp driving unit is connected with the lamp assembly. The lamp control unit further comprises a first electrostatic discharge protection module connected with the first control unit.

2. The CAN FDL transceiver based LED driving system according to claim 1, wherein, The lamp control unit further comprises an SBC module connected with the first control unit.

3. The CAN FDL transceiver based LED driving system according to claim 2, wherein, The lamp driving unit comprises a plurality of power management modules and a boost module, the boost module is connected with the power management module, and the power management module is connected with the lamp assembly.

4. The CAN FDL transceiver based LED driving system according to claim 3, wherein, The lamp driving unit further comprises a second electrostatic discharge protection module connected with the boost module.

5. The CAN FDL transceiver based LED driving system according to claim 4, characterized in that, The lamp driving unit further comprises a motor driving module and a high-side driving module, the motor driving module and the high-side driving module are respectively connected with the lamp assembly; the motor driving module and the high-side driving module are respectively connected with the boost module.

6. The CAN FDL transceiver based LED driving system according to claim 5, wherein, The lamp driving unit further comprises an ADC acquisition module connected with the second CAN FDL transceiver and the lamp assembly.

7. The CAN FDL transceiver based LED driving system according to claim 6, wherein, The lamp driving unit further comprises an LDO module connected with the lamp assembly and the second CAN FDL transceiver.

8. The CAN FDL transceiver based LED driving system according to claim 7, wherein, The second CAN FDL transceiver is integrated with a UART module and an SPI / I2C module.

9. The CAN FDL transceiver based LED driving system according to claim 1, wherein, The lamp assembly comprises an acquisition circuit connected with the ADC acquisition module.

10. The CAN FDL transceiver based LED driving system according to claim 8, wherein, ​

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