Intelligent automobile exterior decoration lamp screen

Abstract

The application discloses an intelligent automobile outer decoration lamp screen, which comprises a data distribution board, an LED driving board and an LED lamp board. The data distribution board is connected with a plurality of LED driving boards through an SPI distribution circuit. The LED driving board is connected with the LED lamp board through an RGB data communication circuit and a line scanning communication circuit. The LED lamp board comprises an LED cathode driving chip, an LED anode driving chip and an array LED lamp group. The RGB data communication circuit is connected with the array LED lamp group through the LED cathode driving chip. The line scanning communication circuit is connected with the array LED lamp group through the LED anode driving chip. The application can be assembled in a split mode according to actual use requirements, and diversified LED light display effects can be realized.

Description

Technical Field

[0001] This invention belongs to the technical field of LED light curtains, specifically relating to an intelligent automotive exterior decorative light curtain. Background Technology

[0002] In modern automotive design, lighting fixtures are not only tools for illumination and signal indication, but have also gradually become an important component of vehicle personalization and intelligence. This invention relates to the field of automotive lighting and display technology, specifically to a smart light curtain and control method applied to the front and rear bumpers of vehicles, particularly suitable for automotive exterior display scenarios requiring dynamic display, flexible adaptation, and cost control. Traditional automotive lighting fixtures have relatively simple functions, making it difficult to meet the needs of modern automobiles for information display, interaction, and personalized design. In recent years, smart light curtain technology has gradually emerged, but most existing smart light curtain solutions use FPGAs as the core control unit. Although this can achieve complex display effects, it suffers from drawbacks such as high cost, long development cycle, and complex maintenance. In addition, the modular design of existing light curtains is insufficient, resulting in high repair and replacement costs if some lights are damaged. Currently, automotive display light curtain solutions on the market mainly suffer from the following problems: High cost: Most solutions use FPGA as the core control chip. FPGA chips themselves are expensive, and the supporting development tools and technical barriers also increase the overall R&D and mass production costs of the solution, which is not conducive to its popularization in low- and mid-range models.

[0003] High maintenance and replacement costs: Most existing light curtains adopt an integrated design, and there are hardware or software compatibility differences between the light panels. If a single light panel is damaged, it cannot be replaced independently. The entire light curtain assembly must be replaced, which greatly increases the user's maintenance and usage costs.

[0004] Poor adaptability: The integrated design of the light curtain cannot flexibly match the number and combination of light panels according to user needs or vehicle characteristics, making it difficult to achieve diverse display effects and limiting the personalized application scenarios of the product.

[0005] Therefore, in view of the above-mentioned problems of existing automotive LED light curtains, the present invention discloses an intelligent automotive exterior decorative light curtain. Summary of the Invention

[0006] This invention discloses an intelligent automotive exterior decorative light curtain that can be assembled in a modular, split manner according to actual usage needs, achieving diverse LED lighting display effects.

[0007] This invention is achieved through the following technical solution: An intelligent automotive exterior decorative lighting screen includes a data distribution board, an LED driver board, and an LED light panel. The data distribution board is connected to several LED driver boards via an SPI distribution circuit. The LED driver boards are connected to the LED light panel via an RGB data communication circuit and a line scanning communication circuit. The LED light panel includes an LED cathode driver chip, an LED anode driver chip, and an array of LED lights. The RGB data communication circuit is connected to the array of LED lights via the LED cathode driver chip, and the line scanning communication circuit is connected to the array of LED lights via the LED anode driver chip.

[0008] As the core control unit, the data distribution board sends display mode control data, LED brightness control data, and display data to the corresponding LED driver board via the SPI distribution circuit. The LED driver board converts the received display data into RGB data and sends it to the LED light board via the RGB data communication circuit. Simultaneously, the LED driver board sends its internally stored line scan data to the LED light board via the line scan circuit, thereby controlling the LED light board to display the corresponding pattern at the set brightness and display mode. The LED light board has arrayed LED groups distributed in a specific matrix pattern, and the LEDs in the array are driven by LED cathode driver chips and LED anode driver chips.

[0009] To better realize the present invention, the data distribution board further includes a data distribution MCU, a first regulated power supply, a flash memory unit, and a data communication interface group. The first regulated power supply is connected to the data distribution MCU, the flash memory unit, and the data communication interface group. The data distribution MCU is connected to the data communication interface group and the flash memory unit. The data distribution MCU is connected to several LED driver boards through an SPI distribution circuit.

[0010] To better realize the present invention, the SPI distribution circuit further includes an SPI transmitting circuit, an SPI receiving circuit, an SPI transmitting frame synchronization circuit, and an SPI receiving frame synchronization circuit. The data distribution MCU is connected to the LED driver board through several SPI transmitting circuits and SPI transmitting frame synchronization circuits. The receiving end of the data distribution MCU is connected to the SPI receiving circuit and the SPI receiving frame synchronization circuit.

[0011] To better realize the present invention, the data communication interface group further includes a CAN transceiver and an Ethernet transceiver. The first regulated power supply is connected to the data distribution MCU, the flash memory unit, the CAN transceiver, and the Ethernet transceiver, respectively. The data distribution MCU is connected to the CAN transceiver and the Ethernet transceiver, respectively.

[0012] To better realize the present invention, the data distribution MCU is further connected to the LED driver board through at least six SPI transmission circuits and at least six SPI transmission frame synchronization circuits.

[0013] To better realize the present invention, the LED driver board further includes a driver MCU, a second regulated power supply, a power output circuit, an SPI receiving circuit, and an SPI receiving frame synchronization circuit. The second regulated power supply is connected to the driver MCU and the power output circuit, respectively. The power output circuit is connected to the LED light board. The receiving end of the driver MCU is connected to the SPI receiving circuit and the SPI receiving frame synchronization circuit, respectively. The output end of the driver MCU is connected to the RGB data communication circuit and the line scanning communication circuit, respectively.

[0014] To better realize the present invention, the LED light board further includes a power input circuit, an RGB data input circuit, and a line scan input circuit. The input terminal of the power input circuit is connected to the power output circuit, and the output terminal of the power input circuit is connected to the LED cathode driver chip and the LED anode driver chip respectively. The RGB data communication circuit is connected to the LED cathode driver chip through the RGB data input circuit, and the line scan communication circuit is connected to the LED anode driver chip through the line scan input circuit.

[0015] To better realize the present invention, the RGB data input circuit is further connected to the array LED lamp group through at least eight sets of LED cathode driver chips connected in series, and the line scanning input circuit is connected to the array LED lamp group through at least four sets of LED anode driver chips connected in parallel.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) The present invention adopts a modular design, using a data distribution board in conjunction with several LED driver boards and LED light boards to achieve modular display. The LED driver boards and LED light boards can be arbitrarily matched and replaced according to actual usage needs, improving the compatibility and flexibility of use. (2) The data distribution board and the LED driver board communicate using an SPI distribution circuit, which results in fast data transmission speed, high stability, and lower error rate; (3) The LED driver board and the LED lamp board are connected through the RGB data communication circuit and the line scanning communication circuit. The LED array LED lamp group is controlled by the LED cathode driver chip and the LED anode driver chip. During the display process, the LED driver board and the LED lamp board are hot-swapped. This will not affect the display effect of other LED lamp boards and will not cause errors in its own display, which greatly improves the reliability of the system and the user experience. (4) LED light boards can be matched arbitrarily according to actual usage needs and achieve different display effects under the control of LED driver boards; (5) During use, the data distribution board, LED driver board and LED light board adopt a modular assembly design. If damage occurs, only the damaged part needs to be replaced, and the entire light curtain does not need to be replaced, making maintenance more convenient. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of an exterior decorative light curtain for an intelligent vehicle; Figure 2 A schematic diagram of the circuit architecture of the data distribution board; Figure 3 This is a schematic diagram of the circuit architecture of an LED driver board. Figure 4 This is a schematic diagram of the circuit architecture of the LED light board; Figure 5 A schematic diagram of the SPI distribution circuit; Figure 6 This is a circuit diagram of a CAN transceiver; Figure 7 This is a circuit diagram of a flash memory cell; Figure 8 This is a schematic diagram of the anode drive circuit; Figure 9 This is a schematic diagram of the cathode drive circuit.

[0018] The components are as follows: 1-Data distribution board; 2-LED driver board; 3-LED lamp board; 11-Data distribution MCU; 12-First regulated power supply; 13-Flash memory unit; 14-CAN transceiver; 15-Ethernet communication transceiver; 21-RGB data communication circuit; 22-Line scanning communication circuit; 23-Driver MCU; 24-Second regulated power supply; 25-Power output circuit; 31-LED cathode driver chip; 32-LED anode driver chip; 33-Power input circuit; 34-RGB data input circuit; 35-Line scanning input circuit. Detailed Implementation

[0019] Example 1: This embodiment presents an intelligent automotive exterior decorative light curtain, such as... Figure 1As shown, the system includes a data distribution board 1, an LED driver board 2, and an LED light board 3. The data distribution board 1 is connected to several LED driver boards 2 via an SPI distribution circuit. The LED driver boards 2 are connected to the LED light board 3 via an RGB data communication circuit 21 and a line scanning communication circuit 22. The LED light board 3 includes an LED cathode driver chip 31, an LED anode driver chip 32, and an array of LED lights 33. The RGB data communication circuit 21 is connected to the array of LED lights 33 via the LED cathode driver chip 31, and the line scanning communication circuit 22 is connected to the array of LED lights 33 via the LED anode driver chip 32.

[0020] like Figure 1 As shown, the intelligent automotive exterior lighting screen includes a data distribution board 1, six LED driver boards 2, and six LED light boards 3. The data distribution board 1 is equipped with a data interface, which can receive control data from the outside. The control data is used to control the display mode of the LED beads, control the brightness of the LED beads, and control the distribution of data. The data distribution board 1 sends the corresponding data to the corresponding LED driver board 2 through an SPI distribution circuit. The LED driver board 2 is responsible for converting the received display data into RGB data and sending the RGB data to the LED light board 3 through an RGB data communication circuit 21. At the same time, the LED driver board 2 sends the row scanning data stored in it to the LED light board 3 through a row scanning circuit 22, thereby controlling the LED light board 3 to display the corresponding pattern with the set brightness and display mode. The LED light board 3 is equipped with at least one array LED light group 33. The array LED light group 33 has 32 rows and 60 columns of LED beads distributed in a certain matrix rule. These beads are driven by LED cathode driver chip 31 and LED anode driver chip 32.

[0021] Example 2: This embodiment discloses an intelligent automotive exterior decorative light curtain, which is an improvement on Embodiment 1, such as... Figure 2 As shown, the data distribution board 1 includes a data distribution MCU 11, a first regulated power supply 12, a flash memory unit 13, and a data communication interface group. The first regulated power supply 12 is connected to the data distribution MCU 11, the flash memory unit 13, and the data communication interface group. The data distribution MCU 11 is connected to the data communication interface group and the flash memory unit 13. The data distribution MCU 11 is connected to several LED driver boards 2 through an SPI distribution circuit.

[0022] The data distribution MCU11 uses the YTM32B1HA0 chip from YunTu, and an external 24MHz crystal oscillator is used, with a system clock frequency of 200MHz. The first regulated power supply 12 includes a 5V power supply and a 3.3V power supply. The 5V power supply uses the ASM6050Q-SOT-223 LDO chip, which serves as the main power supply for the data distribution MCU11 and the data communication interface group. The 3.3V power supply uses the TMI3494-ESOP8 LDO chip, which provides power to the data communication interface group, flash memory unit 13, and some pins of the data distribution MCU11.

[0023] In the data distribution board 1, the flash memory unit 13 is mainly used to store some predefined image or video data. In this embodiment, a 64M Byte NorFlash chip is used as the flash memory, model: MX25L51245GMI-08G.

[0024] Furthermore, the data communication interface group includes a CAN transceiver 14 and an Ethernet transceiver 15. The first regulated power supply 12 is connected to the data distribution MCU 11, the flash memory unit 13, the CAN transceiver 14, and the Ethernet transceiver 15, respectively. The data distribution MCU 11 is connected to the CAN transceiver 14 and the Ethernet transceiver 15, respectively.

[0025] like Figure 6 As shown, the CAN transceiver 14 is connected to the CAN bus and is used to receive control data from the CAN bus, such as data to control the brightness of the LED display and data to control the LED display mode. The model of the CAN transceiver 14 is SIT1044QT.

[0026] Ethernet transceiver 15 is used to receive display data from external devices. Ethernet transceiver 15 uses a crystal connector interface. In data distribution board 1, Ethernet transceiver 15 is mainly used to receive display data from external devices such as vehicle-mounted systems. Ethernet transceiver 15 uses a double-buffered DMA design, allowing the reception of display data and packet transmission to be performed synchronously, improving system processing speed and making system operation smoother.

[0027] like Figure 7 As shown, flash memory unit 13 is mainly used to manage the NorFlash on the data distribution board 1. Its main functions include initializing QSPI, initializing NorFlash, and reading data from NorFlash. Flash memory unit 13 can set the address range for reading NorFlash according to the operating mode of the data distribution board 1, and then distribute the read data to other modules. Flash memory unit 13 also uses DMA for data reading, reducing CPU usage.

[0028] The specific implementation process of applying intelligent automotive exterior decorative lighting curtains on automobiles involves connecting the data distribution board 1, LED driver board 2, and LED light board 3, and then installing them onto the vehicle's front bumper according to the arrangement shown in the attached diagram. Using the corresponding wiring harness, the vehicle's infotainment system is connected to the data distribution board 1, and the data distribution board 1 is connected to the LED driver board 2. The intelligent lighting curtain control interface is then opened on the vehicle's infotainment system, and the appropriate display mode is selected. Display modes include: Welcome Lighting Mode: Data distribution board 1 reads the display data of the welcome lighting mode stored in NorFlash, and then sends the display data to LED driver board 2. After receiving the display data, LED driver board 2 converts the display data into RGB data and then sends it to LED light board 3 for display. Pedestrian yielding mode: Data distribution board 1 reads the display data of pedestrian yielding mode stored in NorFlash, and then sends the display data to LED driver board 2. After receiving the display data, LED driver board 2 converts the display data into RGB data and then sends it to LED light board 3 for display. Charging status mode: Data distribution board 1 reads the display data of the charging status mode stored in NorFlash, and then sends the display data to LED driver board 2. After receiving the display data, LED driver board 2 converts the display data into RGB data and then sends it to LED light board 3 for display. Fireworks and light show mode: Data distribution board 1 reads the display data of the fireworks and light show mode stored in NorFlash, and then sends the display data to LED driver board 2. After receiving the display data, LED driver board 2 converts the display data into RGB data and then sends it to LED light board 3 for display. Simulated car logo mode: Data distribution board 1 reads the display data of simulated car logo mode stored in NorFlash, and then sends the display data to LED driver board 2. After receiving the display data, LED driver board 2 converts the display data into RGB data and then sends it to LED light board 3 for display. Custom mode: In custom mode, data distribution board 1 receives display data from the SPI interface, packages the data into packets, and then sends the packaged display data to LED driver board 2. After receiving the display data, LED driver board 2 converts the display data into RGB data and then sends it to LED light board 3 for display.

[0029] The rest of this embodiment is the same as that of Embodiment 1, so it will not be described again.

[0030] Example 3: This embodiment discloses an intelligent automotive exterior decorative light curtain, which is optimized based on Embodiment 1 or 2. The SPI distribution circuit includes an SPI transmitting circuit, an SPI receiving circuit, an SPI transmitting frame synchronization circuit, and an SPI receiving frame synchronization circuit. The data distribution MCU 11 is connected to the LED driver board 2 through several SPI transmitting circuits and SPI transmitting frame synchronization circuits. The receiving end of the data distribution MCU 11 is connected to the SPI receiving circuit and the SPI receiving frame synchronization circuit. Figure 5 As shown, the SPI distribution circuit includes a TYPEC-951-ARP24 chip.

[0031] The SPI transmitting circuit is mainly used to send display data read from the flash memory unit 13 or received from external devices such as the vehicle's infotainment system to the corresponding LED driver board 2. The SPI transmitting circuit uses DMA (Distributed Data Interchange) for data transmission to minimize CPU usage. When segmenting data packets, the SPI transmitting circuit can allocate data to different SPI interfaces according to the configuration. The corresponding interface configuration can be changed using configuration commands received by the CAN transceiver 14.

[0032] The SPI receiver circuit is mainly used to receive display data from external devices such as the vehicle's infotainment system. The SPI receiver circuit uses a double-buffered + DMA design, which allows the reception of display data and packet transmission to be carried out synchronously, improving the system's processing speed and making the system run more smoothly.

[0033] The SPI transmit frame synchronization circuit and the SPI receive frame synchronization circuit together form the frame synchronization module. The frame synchronization module is mainly used to prevent display errors during SPI data transmission or reception. The frame synchronization module includes two general-purpose GPIO ports. One GPIO port is used as an output, outputting a high level after device initialization to notify the transmitter that the device is ready. The transmitter will only send data to the receiver when it detects that the receiver is ready. The other GPIO port is used as an input to detect the start and end of the received SPI data frame. The transmitter sets this GPIO port high before outputting SPI data and sets it low after sending the data. The receiver configures this GPIO port to be triggered on rising and falling edges and checks the SPI status in the interrupt function to prevent SPI errors.

[0034] Furthermore, the data distribution MCU11 is connected to the LED driver board 2 through at least six SPI transmission circuits and at least six SPI transmission frame synchronization circuits.

[0035] The rest of this embodiment is the same as that of embodiment 1 or 2, so it will not be described again.

[0036] Example 4: This embodiment discloses an intelligent automotive exterior decorative light curtain, which is optimized based on any one of embodiments 1-3, such as... Figure 3 As shown, the LED driver board 2 includes a driver MCU 23, a second regulated power supply 24, a power output circuit 25, an SPI receiving circuit, and an SPI receiving frame synchronization circuit. The second regulated power supply 24 is connected to the driver MCU 23 and the power output circuit 25, respectively. The power output circuit 25 is connected to the LED light board 3. The receiving end of the driver MCU 23 is connected to the SPI receiving circuit and the SPI receiving frame synchronization circuit, respectively. The output end of the driver MCU 23 is connected to the RGB data communication circuit 21 and the line scanning communication circuit 22, respectively.

[0037] The driver MCU23 uses the YTM32B1HA0 chip from YunTu, and an external 24MHz crystal oscillator is used. The system main frequency is 200MHz. The SPI receiver circuit is used to receive display data from the data distribution board 1. The SPI receiver circuit uses a Type-C interface, and the SPI receive frame synchronization circuit is used to realize data synchronization between the LED driver board 2 and the data distribution board 1.

[0038] The RGB data communication circuit 21 is used to send RGB data to the LED light board 3. The receiving end of the RGB data communication circuit 21 uses a QSPI-like communication method, so the QSPI interface of the driver MCU 23 is used to send data to the RGB data communication circuit 21. The RGB data communication circuit 21 includes a data conversion circuit and an RGB data transmission circuit. The data conversion circuit converts the received display data into RGB data. The data conversion circuit includes an MBI5353 chip. Due to the data format requirements of the MBI5353 chip, the display data needs to be converted to the IO0 and IO1 pins of the QSPI for transmission. Additionally, color gamut conversion of the display data is required. To improve the efficiency of data conversion, both conversions are performed using a lookup table. Converting display data to RGB data increases the data volume by four times. Therefore, to reduce system communication overhead, the data conversion module is placed in the LED driver board 2 instead of an external device. The RGB data transmission circuit sends RGB data to the MBI5353 chip using a QSPI interface + DMA method. Since the communication protocol of the MBI5353 chip is similar to the dual-wire DDR mode of QSPI, IO0 is mapped to the SDI pin of the MBI5353 chip, IO1 is mapped to the LE pin of the MBI5353 chip, and CLK is mapped to the DCLK pin of the MBI5353 chip.

[0039] The line scanning communication circuit 22 is used to send line scanning data to the LED light board 3. Since the receiving end of the line scanning communication circuit 22 uses a custom protocol, it uses four general-purpose I / O ports of the driver MCU 23 for simulation. To achieve simultaneous control of these I / O ports and improve the communication rate, these I / O ports must be placed in the same port, and no other functional pins can be placed on the 8-bit pin range. The line scanning communication circuit 22 includes an MBI5989 chip. The MBI5989 chip receives the line scanning data and uses a Timer+DMA+general-purpose GPIO method for data transmission. Because the communication protocol of the MBI5989 chip requires simultaneous operation of four I / O ports, the four I / O pins need to be placed in the same port to directly fill data into the port's output register. To improve the data rate and reduce CPU usage time, a timer-triggered DMA method is used to automatically fill data into the port's output register.

[0040] The second regulated power supply 24 provides 5V power to the LED driver board 2 itself. At the same time, the second regulated power supply 24 is divided into four paths through the power output circuit 25 to provide 5V power to the LED light board 3.

[0041] The rest of this embodiment is the same as any one of embodiments 1-3, so it will not be described again.

[0042] Example 5: This embodiment discloses an intelligent automotive exterior decorative light curtain, which is optimized based on any one of embodiments 1-4, such as... Figure 4 As shown, the LED light board 3 includes a power input circuit 33, an RGB data input circuit 34, and a line scan input circuit 35. The input terminal of the power input circuit 33 is connected to the power output circuit 25, and the output terminal of the power input circuit 33 is connected to the LED cathode driver chip 31 and the LED anode driver chip 32, respectively. The RGB data communication circuit 21 is connected to the LED cathode driver chip 31 through the RGB data input circuit 34, and the line scan communication circuit 22 is connected to the LED anode driver chip 32 through the line scan input circuit 35.

[0043] Furthermore, the RGB data input circuit 34 is connected to the array LED lamp group 33 through at least eight sets of LED cathode driver chips 31 connected in series, and the line scan input circuit 35 is connected to the array LED lamp group 33 through at least four sets of LED anode driver chips 32 connected in parallel. Figure 9As shown, the LED cathode driver chip 31 uses the MBI5353 chip, which can output up to 48 channels. A single LED light board 3 uses a total of 8 MBI5353 chips, which are connected in series for data transmission. Figure 8 As shown, the LED anode driver chip uses the MBI5989 chip, which can output up to 16 channels. A single LED board 3 uses four MBI5989 chips, connected in parallel for data transmission.

[0044] The rest of this embodiment is the same as any one of embodiments 1-4, so it will not be described again.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An intelligent automotive exterior decorative light curtain, comprising a data distribution board (1), an LED driver board (2), and an LED light board (3), characterized in that, The data distribution board (1) is connected to several LED driver boards (2) through an SPI distribution circuit. The LED driver board (2) is connected to the LED lamp board (3) through an RGB data communication circuit (21) and a line scanning communication circuit (22). The LED lamp board (3) includes an LED cathode driver chip (31), an LED anode driver chip (32), and an array of LED lamps (33). The RGB data communication circuit (21) is connected to the array of LED lamps (33) through the LED cathode driver chip (31), and the line scanning communication circuit (22) is connected to the array of LED lamps (33) through the LED anode driver chip (32).

2. The intelligent automotive exterior decorative light curtain according to claim 1, characterized in that, The data distribution board (1) includes a data distribution MCU (11), a first regulated power supply (12), a flash memory unit (13), and a data communication interface group. The first regulated power supply (12) is connected to the data distribution MCU (11), the flash memory unit (13), and the data communication interface group respectively. The data distribution MCU (11) is connected to the data communication interface group and the flash memory unit (13) respectively. The data distribution MCU (11) is connected to several LED driver boards (2) through an SPI distribution circuit.

3. The intelligent automotive exterior decorative light curtain according to claim 2, characterized in that, The SPI distribution circuit includes an SPI transmitting circuit, an SPI receiving circuit, an SPI transmitting frame synchronization circuit, and an SPI receiving frame synchronization circuit. The data distribution MCU (11) is connected to the LED driver board (2) through several SPI transmitting circuits and SPI transmitting frame synchronization circuits. The receiving end of the data distribution MCU (11) is connected to the SPI receiving circuit and the SPI receiving frame synchronization circuit.

4. The intelligent automotive exterior decorative light curtain according to claim 3, characterized in that, The data communication interface group includes a CAN transceiver (14) and an Ethernet transceiver (15). The first regulated power supply (12) is connected to the data distribution MCU (11), the flash memory unit (13), the CAN transceiver (14), and the Ethernet transceiver (15), respectively. The data distribution MCU (11) is connected to the CAN transceiver (14) and the Ethernet transceiver (15), respectively.

5. The intelligent automotive exterior decorative light curtain according to claim 4, characterized in that, The data distribution MCU (11) is connected to the LED driver board (2) through at least six SPI transmission circuits and at least six SPI transmission frame synchronization circuits.

6. A smart automotive exterior decorative light curtain according to any one of claims 1-5, characterized in that, The LED driver board (2) includes a driver MCU (23), a second regulated power supply (24), a power output circuit (25), an SPI receiving circuit, and an SPI receiving frame synchronization circuit. The second regulated power supply (24) is connected to the driver MCU (23) and the power output circuit (25) respectively. The power output circuit (25) is connected to the LED lamp board (3). The receiving end of the driver MCU (23) is connected to the SPI receiving circuit and the SPI receiving frame synchronization circuit respectively. The output end of the driver MCU (23) is connected to the RGB data communication circuit (21) and the line scanning communication circuit (22) respectively.

7. The intelligent automotive exterior decorative light curtain according to claim 6, characterized in that, The LED light board (3) includes a power input circuit (33), an RGB data input circuit (34), and a line scan input circuit (35). The input terminal of the power input circuit (33) is connected to the power output circuit (25), and the output terminal of the power input circuit (33) is connected to the LED cathode driver chip (31) and the LED anode driver chip (32) respectively. The RGB data communication circuit (21) is connected to the LED cathode driver chip (31) through the RGB data input circuit (34), and the line scan communication circuit (22) is connected to the LED anode driver chip (32) through the line scan input circuit (35).

8. The intelligent automotive exterior decorative light curtain according to claim 7, characterized in that, The RGB data input circuit (34) is connected to the array LED lamp group (33) through at least eight sets of LED cathode driver chips (31) connected in series, and the line scan input circuit (35) is connected to the array LED lamp group (33) through at least four sets of LED anode driver chips (32) connected in parallel.

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