Vehicle-mounted lamp control system and vehicle

Abstract

The invention provides a vehicle-mounted lamp control system and a vehicle, and relates to the technical field of vehicle lamps, the vehicle-mounted lamp control system comprises a main control module, a first communication module, a first chip selection module and a display module; the main control module receives a projection instruction; the first communication module and the first chip selection module are connected with the main control module; the display module comprises a second communication module and a plurality of light emitting modules connected with the second communication module, and the second communication module is further in communication connection with the first communication module; and the main control module responds to the projection instruction, outputs a control signal and image data to the second communication module through the first communication module, and outputs a corresponding chip selection signal through the first chip selection module so as to perform addressing selection on the plurality of light-emitting modules, so that the light-emitting modules sequentially emit light according to a set sequence. According to the system, each light emitting module is controlled in a time-sharing manner through the first chip selection module, and communication with the plurality of light emitting modules is realized through the first communication module, so that the communication architecture is simplified, and the hardware and design costs are reduced.

Description

Technical Field

[0001] This application relates to the field of automotive lighting technology, and more specifically, to an on-board lighting control system and a vehicle. Background Technology

[0002] With the development of automotive lighting technology, emerging electric vehicles have increasingly higher functional requirements for their headlights. Against this backdrop, MicroLED headlights, with their advantages of high brightness, high response speed, long lifespan, and miniaturization, have become one of the core development directions for next-generation intelligent automotive lighting due to their superior optical performance and programmable control capabilities.

[0003] In related technologies, to achieve higher-order projection requirements by projecting different graphics onto the same module, multiple Micro LEDs are typically controlled separately using a Controller Area Network (CAN) or a Universal Asynchronous Receiver / Transmitter (UART R / Tx)-CAN interface within the same module. However, configuring multiple CAN / UART-CAN communication channels complicates the communication architecture and increases hardware costs. Furthermore, the multi-channel CAN / UART-CAN control method places higher demands on the Microcontroller Unit (MCU), requiring the MCU to support simultaneous processing of multiple communication interfaces. Correspondingly, the MCU also needs to have multiple CAN interfaces, resulting in higher design costs. Summary of the Invention

[0004] To address the aforementioned issues, this application provides an in-vehicle lighting control system and a vehicle, aiming to resolve the problems of complex communication architecture and high hardware costs when multiple CAN / UART-CAN communication channels are configured in the same module in related technologies.

[0005] In a first aspect, this application provides a vehicle lighting control system, including a main control module, a first communication module, a first chip select module, and a display module; the main control module is configured to receive projection instructions sent by a vehicle controller; the first communication module is connected to the main control module; the first chip select module is connected to the main control module; the display module includes a second communication module and multiple independently configured light-emitting modules, each light-emitting module being connected to the second communication module, and the second communication module also being communicatively connected to the first communication module; wherein, in response to the projection instructions, the main control module outputs control signals and image data to the second communication module via the first communication module, and outputs corresponding chip select signals through the first chip select module to address and select the multiple light-emitting modules, so that each light-emitting module emits light sequentially according to a set order.

[0006] In the above technical solution, the main control module in this application establishes a single-channel communication connection with the second communication module in the display module through a first communication module. Combined with the chip select signal output by the first chip select module, it can achieve precise addressing and selection of multiple light-emitting modules, enabling the same display module to project different graphics to achieve higher-order projection. Furthermore, this application only requires a single main communication link to complete multi-module data transmission, eliminating the need for a multi-channel controller area network (CAN / UART) to control multiple light-emitting modules separately. This significantly reduces the number of communication lines and the interface resource usage of the main control module, effectively reducing the hardware cost and design complexity of the vehicle lighting control system. Secondly, related technologies using multi-channel CAN / UART control require the main control module to have multiple communication interfaces and support concurrent processing capabilities, increasing the difficulty and cost of selecting the main control module. The main control module of this application controls each light-emitting module in a time-division manner through the chip selection mechanism of the first chip select module, and realizes communication with multiple light-emitting modules through the same first communication module. That is, the main control module does not need to manage multiple independent communication channels at the same time, which greatly reduces the demand on the processing power and peripheral resources of the main control module. This is conducive to using a low-cost, low-power general-purpose main control module to achieve high-performance lighting control functions.

[0007] In conjunction with the first aspect, in some possible implementations, the second communication module is a serial communication bridge unit, which is configured to forward the received control signals and image data to the target light-emitting module selected by the chip select signal.

[0008] In the above technical solution, the serial communication bridging unit integrates the functions of a universal asynchronous transceiver and a controller area network transceiver, enabling bidirectional protocol conversion between the UART interface and the CAN bus. This design allows the main control module to send control commands and image data via universal serial interfaces such as UART, while the display module side can connect multiple light-emitting modules via a CAN bus structure, effectively solving the compatibility problem between different communication protocols and improving the system's communication adaptability in complex vehicle environments. Furthermore, by using the serial communication bridging unit as the bridging unit, only a single main communication link is needed to complete data distribution across multiple modules. Combined with the addressing mechanism of the first chip selection module, a "one master, multiple slaves" time-division communication architecture is achieved, avoiding the need to configure an independent communication channel for each light-emitting module, significantly reducing the number of wiring harnesses and interface resource usage, and lowering the complexity of vehicle wiring and manufacturing costs.

[0009] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the first communication module is a controller local area network transceiver, which is connected to the serial communication bridge unit through a communication link.

[0010] In the above technical solution, the controller area network (CLAN) features a highly real-time message transmission mechanism. By configuring the first communication module as CAN_T / Rx, the main control module can utilize the efficient scheduling capability of the CAN bus to rapidly transmit control signals and image data to the downstream display module in frame format, significantly shortening the command transmission delay, meeting the timing accuracy requirements of dynamic lighting control, and improving communication real-time performance and system response speed. Secondly, the CLAN employs differential signal transmission, providing excellent common-mode interference immunity in complex electromagnetic environments (such as vehicle electrical systems). Compared to traditional single-ended communication interfaces, this design effectively reduces the communication error rate caused by power fluctuations, motor start-stop, or high-frequency switching noise, ensuring the reliability and stability of control commands and image data during long-distance transmission, and enhancing communication anti-interference capabilities and signal integrity.

[0011] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the display module further includes multiple second chip select modules, each of which is connected to the first chip select module. The number of second chip select modules corresponds one-to-one with the number of light-emitting modules. The second chip select modules are configured to respond to the chip select signal from the first chip select module to independently address and enable the corresponding target light-emitting module.

[0012] In the above technical solution, by setting a second chip select module corresponding to each light-emitting module, and having the first chip select module uniformly provide the selection signal, each light-emitting module can be individually activated or deactivated, thereby achieving pixel-level or area-level lighting control. Secondly, as a localized enable unit for the display module, the second chip select module can quickly select and activate the target module after receiving the global chip select signal, avoiding the delay caused by frequent polling or broadcasting of control commands by the main control module. Since the enable status of each light-emitting module is autonomously determined by the second chip select module based on the chip select signal, there is no need to repeatedly send enable commands through the main communication bus, significantly reducing the control message traffic on the CAN or UART communication link. Furthermore, combined with address decoding logic, multiple addressing modes (such as linear addressing and matrix addressing) can be supported, enhancing the system's adaptability in different application scenarios.

[0013] Combining the first aspect and the above implementation methods, in some possible implementation methods, the first chip select module includes multiple first chip select interfaces, second chip select interfaces, third chip select interfaces, and fourth chip select interfaces; the multiple first chip select interfaces are respectively connected to the main control module, and the number of first chip select interfaces corresponds one-to-one with the number of second chip select modules; the second chip select interface is connected to the main control module and is used to receive clock signals; the third chip select interface is connected to the main control module; and the fourth chip select interface is connected to multiple second chip select modules.

[0014] In the above technical solution, by setting up an independent first chip select interface corresponding to each second chip select module, the main control module can perform dedicated channel-based chip select control on each target light-emitting module, avoiding the signal crosstalk and delay inconsistency problems existing in traditional multiplexing methods. Independent start / stop of each SPI_CS signal ensures the timing accuracy and reliability of chip select actions, improving the stability of the overall system control timing. The first chip select module receives a unified clock signal from the main control module through the second chip select interface, providing a synchronization reference for the chip select logic operation. This design ensures that all chip select-related operations are executed under the same clock cycle, effectively preventing false triggering or race conditions caused by asynchronous control, and improving the safety and predictability of system operation. The fourth chip select interface, as a common control path, is responsible for uniformly distributing global enable, mode switching, or broadcast control signals to all or some of the second chip select modules. Combined with the fine-grained addressing capability of the independent SPI_CS, a "independent + shared" dual-channel control architecture is formed, reducing the number of control lines and improving wiring integration while ensuring individual controllability.

[0015] Combining the first aspect and the above implementation methods, in some possible implementation methods, each light-emitting module includes a light-emitting array and a memory; the light-emitting array is connected to the second communication module, and the light-emitting array is composed of multiple miniature light-emitting diode beads for forming a local sub-image; the memory is connected to the light-emitting array, and the memory is configured to store the address mapping relationship and brightness compensation parameters of the light-emitting array.

[0016] In the above technical solution, by setting a memory in each light-emitting module to store the address mapping relationship of its light-emitting array, the system can accurately identify the physical location and logical coordinates of each display module in the overall display module. This design enables the main control module to automatically decompose and allocate the corresponding sub-images to the target light-emitting modules based on the global image data, ensuring that each local sub-image is precisely aligned in space, effectively avoiding image misalignment, overlap, or missing parts, and improving the integrity and visual consistency of the final synthesized image.

[0017] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the main control module includes an image segmentation unit, which is configured to decompose the complete image corresponding to the projection indication into multiple sub-images according to the spatial region division rules, and bind each sub-image to the corresponding light-emitting module.

[0018] In the above technical solution, the image segmentation unit decomposes the complete projected image into multiple sub-images according to spatial regions, realizing spatial parallel processing of image data. Each sub-image can be transmitted independently and drive the corresponding light-emitting module, significantly reducing the data load of a single channel and improving the overall system's response speed and frame rate performance, making it particularly suitable for high-resolution, high-refresh-rate display or projection scenarios. By binding projection commands to light-emitting modules in specific spatial regions, precise zoning control of large-size or high-density display / projection panels is achieved.

[0019] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the main control module also includes a timing scheduler. The timing scheduler is connected to the image segmentation unit and is configured to dynamically adjust the light emission order, light emission duration and frame period allocation of each light emission module according to the display priority, spatial position, refresh frequency requirements and environmental perception information of each sub-image.

[0020] In the above technical solution, by introducing a timing scheduler, the system no longer uses a fixed or preset emission timing mode, but instead performs real-time scheduling based on the actual content and operating status. This dynamic adjustment capability significantly improves the intelligence and responsiveness of the display system, enabling it to better adapt to complex and ever-changing application scenarios.

[0021] In conjunction with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the vehicle lighting control system further includes a first power supply module and a second power supply module; the first power supply module is connected to the main control module and the display module, and the main control module is used to control the first power supply module to output a first operating voltage to the display module; the second power supply module is connected to the main control module and the display module, and the main control module is used to control the second power supply module to output a second operating voltage to the display module, the second operating voltage being lower than the first operating voltage; wherein, the first power supply module and the second power supply module are isolated from each other, and the start / stop and output states are independently controlled by the main control module.

[0022] In the aforementioned technical solution, this application establishes a first power supply module and a second power supply module that are mutually isolated, with the main control module independently controlling their start / stop and output states. This allows the two power supply modules to serve the power needs of different functional units or operating modes within the display module. This structural design overcomes the technical limitations of traditional single power supply modes for vehicle-mounted lights, achieving refined power management and enhanced functional safety. Furthermore, the power isolation design of the first and second power supply modules enhances the system's fault tolerance; a failure in one power supply branch will not affect the operation of the other, improving the overall reliability of the system.

[0023] In summary, embodiments of this application provide a vehicle including the vehicle lighting control system described in any of the optional embodiments of the first aspect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the module structure of a vehicle lighting control system provided in an embodiment of this application; Figure 2 This is a schematic diagram of the module structure of another vehicle lighting control system provided in an embodiment of this application; Figure 3 This is a schematic diagram of the module structure of another vehicle lighting control system provided in the embodiments of this application; Figure 4 This is a schematic diagram of the module structure of another vehicle lighting control system provided in the embodiments of this application.

[0025] In the attached figures, the following labels are used: 1. Vehicle-mounted lighting control system; 11. Main control module; 12. First communication module; 13. First chip select module; 14. Display module; 141. Second communication module; 142. Light-emitting module; 1421. Light-emitting array; 1422. Memory; 143. Second chip select module; 15. First power supply module; 16. Second power supply module; SPI_CS, first chip select interface; SPI_SCLK, second chip select interface; SPI_MOSI_RX, third chip select interface. Detailed Implementation

[0026] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0027] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0028] Currently, vehicle lighting typically uses light-emitting diodes (LEDs) as light sources. Compared to traditional halogen lights, LEDs consume significantly less energy; that is, to provide the same brightness, LEDs consume less power, thus improving the overall energy efficiency of the vehicle. Furthermore, LEDs offer higher brightness, longer lifespan, and better shock resistance, making them a popular replacement for halogen lights in vehicles.

[0029] With the rapid development of intelligent vehicle technology, especially the continuous breakthroughs made by emerging car manufacturers in terms of intelligence, personalization, and human-machine interaction, vehicle lighting systems are no longer limited to traditional lighting functions. Instead, they are gradually evolving into multifunctional intelligent terminals integrating safety warnings, information interaction, dynamic projection, and brand logo display. Against this backdrop, Micro LED headlights, with their advantages of high brightness, high response speed, long lifespan, and miniaturization, have become one of the core development directions for next-generation intelligent vehicle lighting due to their superior optical performance and programmable control capabilities. Headlight modules composed of multiple Micro LED chips can meet the needs of achieving more functions and richer projected images. However, when integrating multiple Micro LED chips into the same lamp group, how to achieve different graphics displayed by each chip and control different Micro LED chips through a single driver has become one of the key technical challenges.

[0030] Especially in terms of communication, in order to control multiple independent Micro LED beads simultaneously with a single driver and transmit graphic data separately, each bead needs independent control capability, which places higher demands on the communication system. Traditional Micro LED driving display solutions are usually limited to controlling a single Micro LED bead. However, due to the current technological development level of Micro LED beads, controlling a single Micro LED bead is difficult to meet the needs of multi-functional and multi-scene projection. Multi-functional projection requirements require each Micro LED to be independent and controlled independently. To achieve the requirement of projecting different graphics on the same module, a common solution is to use multiple Controller Area Network (CAN) or Universal Asynchronous Receiver / Transmitter (UART)-CAN interfaces in the same module to control multiple Micro LED chips separately. However, this requires configuring multiple CAN / UART-CAN communication channels, which complicates the communication architecture and increases hardware costs and the overall size of the Micro LED module.

[0031] Furthermore, adopting a multi-channel CAN / UART-CAN control method places higher demands on the microcontroller unit (MCU), requiring the MCU to support simultaneous processing of multiple communication interfaces. This necessitates the MCU having multiple CAN interfaces, resulting in higher design costs. Moreover, MCU products supporting four or more CAN / UART-CAN interfaces are currently scarce in the market, which not only limits the selection range of MCUs but also presents significant challenges to circuit design and system integration.

[0032] Therefore, this application provides an in-vehicle lighting control system and a vehicle. The system controls each light-emitting module in a time-division manner through a first chip select module, and realizes communication with multiple light-emitting modules through a first communication module, which simplifies the communication architecture and reduces hardware and design costs.

[0033] The following description, in conjunction with the accompanying drawings, provides an exemplary description of the vehicle lighting control system and vehicle provided in the embodiments of this application.

[0034] This application provides a vehicle, which includes an on-board lighting control system. The on-board lighting control system can drive and display the on-board lights based on projection instructions issued by the vehicle.

[0035] Optionally, the vehicles provided in this application may be intelligent passenger vehicles (such as pure electric cars, plug-in hybrid electric vehicles and other new energy vehicles, traditional fuel vehicles equipped with advanced driver assistance systems, etc.), commercial transport vehicles (such as electric or fuel-powered trucks, logistics vehicles, city buses, etc.), autonomous driving special vehicles (such as unmanned delivery vehicles, automated shuttle buses, etc.), special operation vehicles (such as engineering rescue vehicles, fire trucks, ambulances, police vehicles, etc.), off-highway vehicles (such as mining dump trucks, agricultural machinery vehicles, airport ground support equipment), or other vehicles.

[0036] The aforementioned projection instruction is the core command for controlling the vehicle-mounted lights to display specific optical patterns. Its content includes parameters such as the target projected image, trigger conditions, display position, duration, brightness level, and modulation frequency. The projection instruction may include, but is not limited to, the following trigger scenarios: Projection instructions are generated based on the environmental perception module: The vehicle collects surrounding environmental data through cameras, radar, ultrasonic sensors, etc. Specifically, the central controller identifies pedestrians, non-motorized vehicles, missing road markings, etc., and automatically generates corresponding projection strategies. For example, if a child is detected driving close to the right side of the vehicle, a "Caution: Children" icon is projected onto the right side of the ground. Another example is when driving on a curve at night, automatically projecting a high beam supplement strip to illuminate the blind spot inside the curve.

[0037] Projection indications are generated through the linkage of navigation systems and high-precision maps: By combining Global Navigation Satellite System (GNSS) positioning, Inertial Measurement Unit (IMU) data, and high-precision map data, the system predicts the attributes of the road ahead (e.g., school zones, sharp turns, construction zones) and generates projection indications with preset patterns in advance. For example, when entering a school zone is detected, a projection indicating "Students entering / exiting, please slow down" is triggered. Similarly, when entering a construction zone is detected, a projection indicating temporary directional arrows or speed limit warnings is triggered.

[0038] Projected indicators are generated based on driver input: Drivers can trigger projected indicators via the central control screen, voice assistant, or gesture control. For example, if the driver manually selects "camping mode," the headlights will project a soft ring of light downwards, creating a projection of campsite lighting. Another example is a driver's voice command, "Turn on the welcome light carpet," which will trigger the headlights to project a brand logo or welcome animation.

[0039] Projection indicators are generated based on the vehicle's own status: When the vehicle is in a specific operating condition, the relevant projection function is automatically activated. For example, during charging, a projection indicator of a charging progress bar or a "Charging" sign is triggered. Another example is when autonomous driving mode is activated, a projection indicator of "This vehicle is driving autonomously" is triggered on the ground. Yet another example is when the vehicle's battery low-temperature warning is triggered, a projection indicator of a "Battery Abnormality" warning symbol is triggered.

[0040] In order to enable the vehicle lighting control system of this application to achieve higher resolution and richer dynamic projection effects based on projection indication, in one example, such as Figure 1 As shown, the vehicle lighting control system 1 provided in this application may include a main control module 11, a first communication module 12, a first chip select module 13, and a display module 14. The first chip select module 13 is connected to the main control module 11, and the first communication module 12 is also connected to the main control module 11. The display module 14 is connected to the first chip select module 13, and the display module 14 includes a second communication module 141 and multiple independently configured light-emitting modules 142. Each light-emitting module 142 is connected to the second communication module 141, and the second communication module 141 is also communicatively connected to the first communication module 12.

[0041] The main control module 11 receives projection instructions and generates corresponding LED drive commands based on these instructions. The projection instructions include, but are not limited to, the target projection image data, display mode (static / dynamic), trigger conditions, duration, brightness level, and environmental adaptation parameters. Notably, the main control module 11 pre-stores an image mapping table and a timing control strategy. Based on the received projection instructions, the main control module 11 combines the pre-stored image mapping table and timing control strategy to generate the corresponding LED drive commands. The LED drive commands include at least the activation order of each light-emitting module 142, the start and end timestamps of each light-emitting module 142, the luminous intensity, frame period configuration parameters, error checking, and synchronization signals.

[0042] In the system provided in this application, the display module 14 is divided into multiple independently configured light-emitting modules 142. The main control module 11 performs time-division multiplexing on each light-emitting module 142 according to the projection instructions. Combined with the persistence of vision (POV) effect, the display resolution and image complexity are "virtually expanded" at the perception level, achieving higher-order projection requirements. It is worth noting that the persistence of vision refers to the human eye's perception of light stimuli having a residual characteristic of about 0.05~0.1s. That is, when the light source flickers rapidly, if the frame rate is higher than the critical fusion frequency (usually above ~30Hz), the human eye will not be able to distinguish individual light-emitting events, but will perceive them as a continuous and stable image. Therefore, when the main control module 11 controls each light-emitting module 142 to emit light sequentially according to the projection instructions, the persistence of vision effect will perceive it as a continuous and stable image.

[0043] Specifically, the main control module 11 generates corresponding LED drive commands based on the projection indication and responds to these commands. The main control module 11 is specifically configured to: respond to the projection indication (i.e., the LED drive command), output control signals and image data to the second communication module 141 via the first communication module 12, and output corresponding chip select signals via the first chip select module 13 to address and select multiple light-emitting modules 142, causing each light-emitting module 142 to emit light sequentially according to a set order. By high-speed polling to illuminate each light-emitting module 142, multiple low-resolution light-emitting modules 142 can be reused repeatedly in the time dimension to form a continuous dynamic image, thereby "synthesizing" a visual effect far exceeding the limitations of the physical layout, realizing the need for projecting different graphics onto the same display module 14 to achieve higher-order projection. Although each light-emitting module 142 is discretely arranged and has a limited number of physical pixels, by precisely controlling its lighting time sequence, duration, and position sequence, a "scanning" image can be generated in moving scenes or when the observer's perspective changes. For example, when a vehicle is in motion, the onboard lights may shift relative to the road surface or the surrounding environment. The system can dynamically adjust the lighting sequence in conjunction with the vehicle speed information, so that the light-emitting points that are lit at different times form a continuous pattern in space. This method essentially achieves pseudo-high-resolution imaging with spatiotemporal coupling.

[0044] Compared to designs that use high-density, high-pixel light-emitting arrays to achieve high-definition projection, this system does not require additional light-emitting modules 142. Complex image output can be achieved with a smaller number of independent light-emitting modules 142, significantly reducing the number of hardware components, wiring complexity, and overall power consumption.

[0045] Thus, in this application, the main control module 11 establishes a single-channel communication connection with the second communication module 141 in the display module 14 through a first communication module 12. Combined with the chip select signal output by the first chip select module 13, it can accurately address and select multiple light-emitting modules 142, enabling the same display module 14 to project different graphics for higher-order projection. Furthermore, this application only requires a single main communication link to complete multi-module data transmission, eliminating the need for a multi-channel controller area network (CAN / UART) to control multiple light-emitting modules 142 separately. This significantly reduces the number of communication lines and the interface resource usage of the main control module 11, effectively lowering the hardware cost and design complexity of the vehicle lighting control system 1. Secondly, related technologies using multi-channel CAN / UART control require the main control module 11 to have multiple communication interfaces and support concurrent processing capabilities, increasing the difficulty and cost of selecting the main control module 11. The main control module 11 of this application controls each light-emitting module 142 in a time-division manner through the chip selection mechanism of the first chip selection module 13, and realizes communication with multiple light-emitting modules 142 through the same first communication module 12. That is, the main control module 11 does not need to manage multiple independent communication channels at the same time, which greatly reduces the demand on the processing power and peripheral resources of the main control module 11, and is conducive to using a low-cost, low-power general-purpose main control module 11 to realize high-performance lighting control function.

[0046] Optionally, the main control module 11 may be a microcontroller unit (MCU), an application-specific integrated circuit (ASIC), or a field-programmable gate array (FPGA).

[0047] The number of light-emitting modules 142 can be set according to actual needs. For example, if a low-cost driving is desired, only three sets of light-emitting modules 142 can be set. If a higher resolution projection effect is desired, more light-emitting modules 142 can be set. This application does not impose specific limitations on this.

[0048] The working principle of the above system will be explained in detail below, taking three groups of light-emitting modules 142 as an example. For an example, please refer to... Figure 2 and Figure 3 As shown, the multiple light-emitting modules 142 include a first light-emitting module 142a, a second light-emitting module 142b, and a third light-emitting module 142c, and the main control module 11 is connected to the first light-emitting module 142a, the second light-emitting module 142b, and the third light-emitting module 142c.

[0049] In this example, when the first light-emitting module 142a, the second light-emitting module 142b, and the third light-emitting module 142c individually illuminate different images, for example, as shown... Figure 2 As shown, the main control module 11 can transmit images via the Serial Peripheral Interface (SPI) protocol. For example, as shown... Figure 3 As shown, the main control module 11 has only two communication links. One communication link is connected to the vehicle (AUTO-mobile) to receive projection instructions provided by the vehicle or to transmit signals to the vehicle. The other communication link is connected to the second communication module 141 (not shown in the figure) in the display module 14 to achieve communication with multiple light-emitting modules 142 in the display module 14. Thus, the main control module 11 in this application adopts an architecture of one vehicle body communication and one control communication, combined with multi-channel chip select image transmission, replacing the method of controlling multiple Micro LEDs with multiple CAN / / UART_CAN in related technologies, which greatly simplifies the communication and control methods, hardware design, and reduces manufacturing costs.

[0050] Optionally, the main control module 11 and the second communication module 141 can be connected via CAN or UART communication. CAN and UART communication have advantages such as simple wiring, strong anti-interference ability, and stable communication, and can support efficient and reliable communication control. In particular, the CAN bus has multi-master communication and error detection mechanisms, which are suitable for high-reliability control in complex electromagnetic environments; while UART is suitable for point-to-point, low-latency data transmission. The two can be flexibly selected according to the actual hardware configuration, and this application does not impose specific restrictions on this.

[0051] In one example, such as Figure 4 As shown, the second communication module 141 is a serial communication bridge unit UART_CAN / TRx, which is configured to forward the received control signals and image data to the target light-emitting module 142 selected by the chip select signal.

[0052] In this example, the serial communication bridging unit UART_CAN / TRx integrates the functions of a Universal Asynchronous Receiver / Transmitter (UART) and a Controller Area Network Transceiver (CAN / TRx), enabling bidirectional protocol conversion between the UART interface and the CAN bus. This design allows the main control module 11 to send control commands and image data via universal serial interfaces such as UART, while the display module 14 can connect multiple light-emitting modules 142 via a CAN bus structure, effectively solving the compatibility problem between different communication protocols and improving the system's communication adaptability in complex vehicle environments. Furthermore, by using the serial communication bridging unit UART_CAN / TRx as the bridging unit, only a single main communication link is needed to complete data distribution across multiple modules. Combined with the addressing mechanism of the first chip select module 13, a "one master, multiple slaves" time-division communication architecture is achieved, avoiding the need to configure an independent communication channel for each light-emitting module 142, significantly reducing the number of wiring harnesses and interface resource usage, and lowering the complexity of vehicle wiring and manufacturing costs.

[0053] Furthermore, the CAN bus itself possesses excellent differential signal transmission characteristics and error detection mechanisms, exhibiting strong anti-interference capabilities in complex automotive electromagnetic environments. By converting upper-level control signals into CAN format for transmission through the serial communication bridging unit UART_CAN / TRx, communication distance can be extended while ensuring data integrity, thereby improving system stability and reliability.

[0054] In one example, such as Figure 4 As shown, the first communication module 12 is a controller local area network transceiver CAN_T / Rx, which is connected to the serial communication bridge unit UART_CAN / TRx via a communication link.

[0055] In this example, the Controller Area Network (CAN) features a highly real-time message transmission mechanism. By configuring the first communication module 12 as CAN_T / Rx, the main control module 11 can utilize the efficient scheduling capability of the CAN bus to rapidly transmit control signals and image data to the downstream display module 14 in frame format, significantly shortening the command transmission delay, meeting the timing accuracy requirements of dynamic lighting control, and improving communication real-time performance and system response speed. Secondly, the CAN_T / Rx Controller Area Network employs differential signal transmission, providing excellent common-mode interference immunity in complex electromagnetic environments (such as vehicle electrical systems). Compared to traditional single-ended communication interfaces, this design effectively reduces the communication error rate caused by power fluctuations, motor start / stop, or high-frequency switching noise, ensuring the reliability and stability of control commands and image data during long-distance transmission, and enhancing communication anti-interference capabilities and signal integrity.

[0056] Optionally, the serial communication bridging unit UART_CAN / TRx and the controller area network transceiver CAN_T / Rx can be connected via UART_CAN control communication, and the data transmission speed can reach 5Mbps (megabits per second) bandwidth.

[0057] In one example, such as Figure 4 As shown, the display module 14 also includes multiple second chip select modules 143, each connected to the first chip select module 13. The number of second chip select modules 143 corresponds one-to-one with the number of light-emitting modules 142. Each second chip select module 143 is configured to independently address and enable the corresponding target light-emitting module 142 in response to a chip select signal from the first chip select module 13.

[0058] In this example, by setting a second chip select module 143 corresponding to each light-emitting module 142, and with the first chip select module 13 providing a unified selection signal, each light-emitting module 142 can be individually activated or deactivated, thereby achieving pixel-level or area-level lighting control. Secondly, the second chip select module 143, as a localized enable unit for the display module 14, can quickly select and activate the target module after receiving the global chip select signal, avoiding the delay caused by frequent polling or broadcasting of control commands by the main control module 11. Since the enable status of each light-emitting module 142 is determined autonomously by the second chip select module 143 based on the chip select signal, there is no need to repeatedly send enable commands through the main communication bus, significantly reducing the control message traffic on the CAN or UART communication link. Combined with address decoding logic, multiple addressing modes (such as linear addressing and matrix addressing) can be supported, enhancing the system's adaptability in different application scenarios.

[0059] In addition, each second chip select module 143 is independently responsible for the selection control of one light-emitting module 142. When a light-emitting module or its driving circuit experiences a short circuit, open circuit, or other fault, the corresponding second chip select module 143 can be disabled to isolate the fault, prevent the abnormality from spreading to other normal modules, ensure that the rest of the system continues to work stably, and improve the fault tolerance and safety of the system.

[0060] Optionally, the second chip select module 143 can be SPI. The illustration shows a module 14 including three light-emitting modules 142 as an example; correspondingly, the second chip select module 143 also has three components, as shown in the figure: SPI1, SPI2, and SPI3. The second chip select module 143 can also use Low Voltage Differential Signaling (LVDS) technology, an Inter-Integrated Circuit (IIC) bus, or other types of chip select modules. The number of components can be adjusted according to the specific number of light-emitting modules 142; this application does not impose specific limitations on this.

[0061] In one example, such as Figure 4 As shown, the first chip select module 13 includes multiple first chip select interfaces SPI_CS, second chip select interfaces SPI_SCLK, third chip select interfaces SPI_MOSI_RX, and a fourth chip select interface. The multiple first chip select interfaces SPI_CS are respectively connected to the main control module 11, and the number of SPI_CS interfaces configured corresponds one-to-one with the number of second chip select modules 143. The second chip select interface SPI_SCLK is connected to the main control module 11 and is used to receive the clock signal (SerialClock, SCLK). The third chip select interface SPI_MOSI_RX is connected to the main control module 11; the fourth chip select interface is connected to the multiple second chip select modules 143.

[0062] For example, the illustration shows that the display module 14 includes three light-emitting modules 142. Correspondingly, the first chip select interface SPI_CS is also configured with three interfaces, as shown in the figure: SPI_CS1, SPI_CS2, and SPI_CS3. Assume the lighting sequence is the first light-emitting module 142, the second light-emitting module 142, and the third light-emitting module 142. When the first light-emitting module 142 is lit, the main control module 11 sends a first chip select signal SPI_CS1 to the first chip select module 13 via the SPI_CS1 interface. The first chip select module 13 selects the first light-emitting module 142 based on the first chip select signal SPI_CS1. At this time, the second communication module 141 only sends control signals and image data to the first light-emitting module 142. After the first light-emitting module 142 is turned off, when the second light-emitting module 142 is turned on, the main control module 11 sends the corresponding second chip select signal SPI_CS2 to the first chip select module 13 via the SPI_CS2 interface. The first chip select module 13 selects the second light-emitting module 142 based on the second chip select signal SPI_CS2. At this time, the second communication module 141 only sends the corresponding control signals and image data to the second light-emitting module 142. After the second light-emitting module 142 is turned off, when the third light-emitting module 142 is turned on, the main control module 11 sends the third chip select signal SPI_CS3 to the first chip select module 13 via the SPI_CS3 interface. The first chip select module 13 selects the third light-emitting module 142 based on the third chip select signal SPI_CS3. At this time, the second communication module 141 only sends control signals and image data to the third light-emitting module 142.

[0063] In this example, by setting an independent first chip select interface SPI_CS corresponding to each second chip select module 143, the main control module 11 can perform dedicated channel-based chip select control on each target light-emitting module 142, avoiding the signal crosstalk and delay inconsistency problems existing in traditional multiplexing methods. The independent start and stop of each SPI_CS signal ensures the timing accuracy and reliability of the chip select action, improving the stability of the overall system control timing. The first chip select module 13 receives the unified clock signal SCLK from the main control module 11 through the second chip select interface SPI_SCLK, providing a synchronization reference for the chip select logic operation. This design ensures that all chip select-related operations are executed under the same clock cycle, effectively preventing false triggering or race conditions caused by asynchronous control, and improving the safety and predictability of system operation. The fourth chip select interface, as a common control path, is responsible for uniformly distributing global enable, mode switching, or broadcast control signals to all or some of the second chip select modules 143. By combining the fine addressing capabilities of the independent SPI_CS, a dual-channel control architecture of "independent + shared" is formed, which reduces the number of control lines and improves the wiring integration while ensuring individual controllability.

[0064] In one example, such as Figure 4 As shown, each light-emitting module 142 includes a light-emitting array 1421 and a memory 1422. The light-emitting array 1421 is connected to the second communication module 141, and is composed of multiple miniature light-emitting diode beads for forming local sub-images. The memory 1422 is connected to the light-emitting array 1421, and is configured to store the address mapping relationship and brightness compensation parameters of the light-emitting array 1421.

[0065] The light-emitting array 1421 can employ 4096 independently addressable pixels arranged in a two-dimensional array, possessing high spatial resolution and enabling accurate reproduction of image details, thus significantly improving projection effects and user experience. It is worth noting that all pixels in each light-emitting array 1421 are independently addressable, allowing the state of each pixel (such as on / off status and brightness level) to be individually controlled. This supports complex image rendering modes and dynamic local dimming technology, enhancing the system's response speed and energy efficiency management capabilities.

[0066] Optionally, the light-emitting array 1421 can support a 3-frame rate, meaning the system can update the light distribution pattern a maximum of 3 times per second to match the camera sensing and image processing latency.

[0067] The memory 1422 stores the address mapping relationship and brightness compensation parameters of the light-emitting array 1421. Using the pre-stored brightness compensation parameters in the memory 1422, personalized brightness adjustment can be performed on pixels with different positions and characteristics during the driving process, effectively compensating for uneven pixel light emission caused by manufacturing process differences, thereby significantly improving the overall uniformity and visual consistency of the displayed image. Local storage of the address mapping and compensation parameters reduces dependence on external storage and communication buses, lowers the risk of signal interference, and simplifies the system architecture, facilitating the design of miniaturized, highly reliable display modules.

[0068] Optionally, the LED array 1421 and the memory 1422 can use an I2C bus to transmit signals. The I2C bus only requires two signal lines to realize data transmission: a serial clock line (SCL), which is provided by the master device with a clock signal, and a serial data line (SDA), which is used to realize bidirectional data transmission between the LED array 1421 and the memory 1422.

[0069] It is understood that the system in this application can achieve the projection effect of high-pixel Micro LED through low-pixel Micro LED particle combination projection.

[0070] In this example, by setting a memory 1422 in each light-emitting module 142 to store the address mapping relationship of its light-emitting array 1421, the system can accurately identify the physical location and logical coordinates of each light-emitting module 142 in the overall display module 14. This design enables the main control module 11 to automatically decompose and allocate the corresponding sub-images to the target light-emitting module 142 according to the global image data, ensuring that each local sub-image is precisely aligned in space, effectively avoiding image misalignment, overlap or missing parts, and improving the integrity and visual consistency of the final synthesized image.

[0071] In one example, the main control module 11 includes an image segmentation unit, which is configured to decompose the complete image corresponding to the projection indication into multiple sub-images according to the spatial region division rules, and bind each sub-image to the corresponding light-emitting module 142.

[0072] In this example, the image segmentation unit decomposes the complete projected image into multiple sub-images according to spatial regions, achieving spatial parallel processing of image data. Each sub-image can be transmitted independently and drive the corresponding light-emitting module 142, significantly reducing the data load of a single channel and improving the overall system's response speed and frame rate performance, making it particularly suitable for high-resolution, high-refresh-rate display or projection scenarios. By binding projection commands to the light-emitting modules 142 of specific spatial regions, precise zoning control of large-size or high-density display / projection panels is achieved.

[0073] In one example, the main control module 11 also includes a timing scheduler connected to the image segmentation unit. The timing scheduler is configured to dynamically adjust the light emission order, light emission duration, and frame period allocation of each light emission module 142 according to the display priority, spatial location, refresh frequency requirements, and environmental awareness information of each sub-image.

[0074] In this example, by introducing a timing scheduler, the system no longer uses a fixed or preset emission timing mode, but instead performs real-time scheduling based on the actual content and operating status. This dynamic adjustment capability significantly improves the intelligence and responsiveness of the display system, enabling it to better adapt to complex and ever-changing application scenarios.

[0075] For example, the timing scheduler can prioritize resource allocation based on the display priority of sub-images (e.g., user attention area, moving objects, alarm prompts, etc.), advance or extend the light emission time of their corresponding light-emitting modules 142, ensure that highly important content obtains better display quality and response speed, thereby enhancing the key perceptual performance of user experience and improving the visual performance and timeliness of key areas.

[0076] For example, by combining environmental perception information (such as ambient light intensity, temperature, and user's line of sight), the timing scheduler can automatically adjust the emission duration and emission sequence of the light-emitting module 142. For instance, in strong light environments, the emission pulse width of key areas can be extended to improve visibility; in low light environments, the emission time can be shortened to prevent overexposure. This function improves the system's adaptability to changes in the external environment and ensures stable display performance around the clock.

[0077] Furthermore, to address the varying refresh rate requirements of different areas (e.g., dynamic areas require high-frequency refresh, while static backgrounds can have a lower refresh rate), the timing scheduler dynamically adjusts the frame period of each emitting module 142 to achieve "on-demand refresh." This strategy can allocate refresh resources on demand, improve energy efficiency, significantly reduce overall power consumption, and extend device lifespan.

[0078] In one example, such as Figure 4 As shown, the vehicle lighting control system 1 also includes a first power supply module 15 and a second power supply module 16. The first power supply module 15 is connected to the main control module 11 and the display module 14. The main control module 11 controls the first power supply module 15 to output a first operating voltage to the display module 14. The second power supply module 16 is connected to the main control module 11 and the display module 14. The main control module 11 controls the second power supply module 16 to output a second operating voltage to the display module 14, the second operating voltage being lower than the first operating voltage.

[0079] The first power supply module 15 and the second power supply module 16 are isolated from each other, and their start / stop and output states are independently controlled by the main control module 11. It is worth noting that although the first power supply module 15 and the second power supply module 16 are both connected to the main control module 11 and the display module 14, the first power supply module 15 and the second power supply module 16 do not power the same type of circuit or operating mode, but rather serve the power needs of different operating states or different functional units.

[0080] For example, the first power supply module 15 can be 5V, used to power the main control / logic / interface in the display module 14, and the second power supply module 16 can be 4V, used to power the analog driver / light-emitting array in the display module 14. During system power-on self-test, the main control module 11 sends a 5V POWER SUPPLY command to the first power supply module 15 to enable the first power supply module 15 to supply power, i.e., output a Logic Supply signal to the display module 14. When executing the projection command, the main control module 11 sends a 5V POWER SUPPLY command and a 4V POWER SUPPLY command to the first power supply module 15 and the second power supply module 16 respectively, so that the first power supply module 15 and the second power supply module 16 provide dual power supply in coordination, realizing simultaneous operation of control and display, i.e., outputting a Logic Supply signal and a Power Supply signal to the display module 14. When entering standby / sleep mode, only the first power supply module 15 provides power, reducing quiescent current while maintaining wake-up capability.

[0081] Thus, by setting up a first power supply module 15 and a second power supply module 16 that are mutually isolated, and having their start / stop and output states independently controlled by the main control module 11, this application enables the two power supply modules to serve the power needs of different functional units or operating modes in the display module 14. This structural design breaks through the technical limitations of the traditional single power supply mode for vehicle lighting, achieving refined power management and improved functional safety. Furthermore, the power isolation design of the first power supply module 15 and the second power supply module 16 enhances the system's fault tolerance; a failure in one power supply branch will not affect the operation of the other branch, improving the overall reliability of the system.

[0082] It is worth noting that the aforementioned display module 14 is an Adaptive Driving Beam (ADB) system, specifically a Micro LED headlight. The Micro LED headlight uses multiple Micro LED beads (i.e., light-emitting modules 142) combined for projection to achieve the projection effect. Optionally, multiple Micro LED beads can be used within the same Micro LED headlight by selecting different chip groups (CS) to allow the driver to transmit different data and display different graphics. Alternatively, multiple Micro LED beads within the same Micro LED headlight can be controlled by a single driver using multiple CAN transceivers.

[0083] In summary, in this application, the main control module 11 establishes a single-channel communication connection with the second communication module 141 in the display module 14 through a first communication module 12. Combined with the chip select signal output by the first chip select module 13, it can accurately address and select multiple light-emitting modules 142, enabling the same display module 14 to project different graphics for higher-order projection. Furthermore, this application only requires a single main communication link to complete multi-module data transmission, eliminating the need for a multi-channel controller area network (CAN / UART) to control multiple light-emitting modules 142 separately. This significantly reduces the number of communication lines and the interface resource usage of the main control module 11, effectively lowering the hardware cost and design complexity of the vehicle lighting control system 1. Secondly, related technologies using multi-channel CAN / UART control require the main control module 11 to have multiple communication interfaces and support concurrent processing capabilities, increasing the difficulty and cost of selecting the main control module 11. The main control module 11 of this application controls each light-emitting module 142 in a time-division manner through the chip selection mechanism of the first chip selection module 13, and realizes communication with multiple light-emitting modules 142 through the same first communication module 12. That is, the main control module 11 does not need to manage multiple independent communication channels at the same time, which greatly reduces the demand on the processing power and peripheral resources of the main control module 11, and is conducive to using a low-cost, low-power general-purpose main control module 11 to realize high-performance lighting control function.

[0084] It is understandable that when controlling N Micro LED beads, this application only requires as follows: Figure 3 The two CAN groups shown can control all LED chips and vehicle body communication.

[0085] Through the above description of the embodiments, those skilled in the art will understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0086] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0087] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vehicle-mounted lighting control system, characterized in that, The vehicle-mounted lighting control system includes: The main control module is configured to receive projection instructions sent by the vehicle controller; A first communication module is connected to the main control module; A first chip select module, which is connected to the main control module; and... The display module includes a second communication module and multiple independently configured light-emitting modules. Each light-emitting module is connected to the second communication module, and the second communication module is also connected to the first communication module. In response to the projection instruction, the main control module outputs control signals and image data to the second communication module via the first communication module, and outputs corresponding chip select signals through the first chip select module to address and select multiple light-emitting modules, so that each light-emitting module emits light sequentially in a set order.

2. The vehicle lighting control system according to claim 1, characterized in that, The second communication module is a serial communication bridging unit, which is configured to forward the received control signal and the image data to the target light-emitting module selected by the chip select signal.

3. The vehicle-mounted lighting control system according to claim 2, characterized in that, The first communication module is a controller local area network transceiver, which is connected to the serial communication bridge unit via a communication link.

4. The vehicle lighting control system according to claim 1, characterized in that, The display module also includes: Multiple second chip select modules are provided, each connected to the first chip select module. The number of second chip select modules corresponds one-to-one with the number of light-emitting modules. The second chip select module is configured to respond to the chip select signal from the first chip select module to independently address and enable the corresponding target light-emitting module.

5. The vehicle lighting control system according to claim 4, characterized in that, The first chip select module includes: Multiple first chip select interfaces are connected to the main control module, and the number of first chip select interfaces corresponds one-to-one with the number of second chip select modules. The second chip select interface is connected to the main control module and is used to receive clock signals; A third chip selection interface, which is connected to the main control module; and... A fourth chip select interface, which is connected to multiple second chip select modules.

6. The vehicle lighting control system according to claim 1, characterized in that, Each of the aforementioned light-emitting modules includes: A light-emitting array, connected to the second communication module, the light-emitting array being composed of multiple miniature light-emitting diode beads, used to form a local sub-image; and... A memory connected to the light-emitting array, configured to store the address mapping relationship and brightness compensation parameters of the light-emitting array.

7. The vehicle lighting control system according to claim 1, characterized in that, The main control module includes: An image segmentation unit is configured to decompose the complete image corresponding to the projection indication into multiple sub-images according to spatial region division rules, and bind each sub-image to the corresponding light-emitting module.

8. The vehicle lighting control system according to claim 7, characterized in that, The main control module also includes: A timing scheduler is connected to the image segmentation unit. The timing scheduler is configured to dynamically adjust the light emission order, light emission duration, and frame period allocation of each light emission module according to the display priority, spatial location, refresh frequency requirements, and environmental awareness information of each sub-image.

9. The vehicle lighting control system according to any one of claims 1-8, characterized in that, The vehicle lighting control system also includes: A first power supply module, connected to the main control module and the display module, wherein the main control module controls the first power supply module to output a first operating voltage to the display module; and... The second power supply module is connected to the main control module and the display module. The main control module is used to control the second power supply module to output a second working voltage to the display module. The second working voltage is lower than the first working voltage. The first power supply module and the second power supply module are isolated from each other, and the start / stop and output status are independently controlled by the main control module.

10. A vehicle, characterized in that, Including the vehicle lighting control system as described in any one of claims 1-9.

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