Video projection vehicle lamp system and vehicle

Abstract

The utility model discloses a video projection vehicle lamp system and a vehicle, and the system at least comprises a video transmission module which receives video source end data, and outputs a differential video signal and a clock synchronization signal to a projection driving module; the projection driving module outputs an LED driving signal and an LED power supply driving signal; the LED module receives an LED driving signal and emits a light source to the projection driving module to form video projection; the LED power supply driving module receives an LED power supply driving signal and supplies power to the LED module; the configuration module outputs a configuration signal to the video transmission module and the projection driving module so as to transmit the differential video signal and the clock synchronization signal, and reads the working state information of the video transmission module; wherein the communication rate between the video source end and the high-speed connector is greater than or equal to 2Gbps; the LED module comprises a grooved thermoelectric separation PCB (printed circuit board). Wherein the video transmission module realizes video data interaction adaptive to the million-level pixel projection vehicle lamp through the high-speed connector and the deserializer.

Description

Technical Field

[0001] This application relates to the field of projection vehicle lights, and in particular to a video projection vehicle light system and vehicle. Background Technology

[0002] With the development of new energy vehicles and projection technology, the market demand for projection headlights is increasing. New energy vehicle manufacturers are investing more and more in the research and development of projection headlights, and the pixel count of projection headlights is constantly improving. The interaction speed and data volume between the vehicle and the headlights are also increasing. This places higher demands on the data communication system and projection solution between the vehicle and the headlights, and poses challenges to the immediacy, stability and anti-interference of data interaction.

[0003] Currently, existing technologies, whether through direct data harness interaction or through LIN bus (Local Interconnect Network), CAN bus (Controller Area Network), or CAN-FD bus (CAN with Flexible Data Rate), are insufficient to meet the hundreds of Mbit-level data volume of megapixel projection headlights. Therefore, a new projection headlight system is urgently needed to meet the interaction requirements of megapixel levels. Utility Model Content

[0004] Embodiments of this application provide a video projection vehicle lighting system and vehicle, which enables high-data-volume vehicle lighting interaction using a video transmission module with a high-speed connector and a deserializer.

[0005] To address the aforementioned technical problems, embodiments of this application disclose the following technical solutions:

[0006] This application provides a video projection vehicle lighting system, comprising: a video transmission module including a high-speed connector and a deserializer, wherein the high-speed connector receives video source data and transmits the video source data to the deserializer, and the deserializer outputs a differential video signal and a clock synchronization signal; a projection driving module having a digital micromirror internally, wherein the projection driving module receives the differential video signal and clock synchronization signal output by the deserializer and outputs an LED driving signal and an LED power driving signal; an LED module receiving the LED driving signal and emitting a light source to the digital micromirror within the projection driving module to form a video projection; an LED power driving module receiving the LED power driving signal and supplying power to the LED module; and a configuration module outputting a configuration signal to the video transmission module and the projection driving module, and reading the operating status information of the video transmission module; wherein the communication rate between the video source and the high-speed connector is greater than or equal to 2Gbps; and the LED module includes a slotted thermoelectric separation PCB. In one feasible embodiment, the configuration module is selected as an MCU (Microcontroller Unit).

[0007] Furthermore, the aforementioned video projection vehicle lighting system also includes a stepper motor module, which has a stepper motor and is configured to receive configuration signals from the configuration module; the configuration module also reads the operating status information of the stepper motor module; the configuration signal received by the stepper motor module contains projection predetermined position information, and the stepper motor moves the video projection to the projection predetermined position.

[0008] Furthermore, the data transmission rate between the high-speed connector and the deserializer is greater than or equal to 3Gbps.

[0009] In the above technical solution, the video source data is transmitted to the high-speed connector via a single-ended coaxial cable or a twisted-pair shielded cable.

[0010] Furthermore, the high-speed connector is a Mini-Fakra interface; or optionally, the high-speed connector is an HSD interface.

[0011] Based on the above technical solution, the video projection vehicle lighting system further includes: a CAN communication module, which communicates with the configuration module at low speed to output the configuration signal or receive the working status information, and outputs a power drive signal; and a power supply module, which receives the power drive signal and supplies power to the configuration module, video transmission module, projection drive module, LED power drive module and stepper motor module.

[0012] In any of the above technical solutions, the video transmission module further receives video data in FPD-LINK III format.

[0013] In any of the above technical solutions, the light source pixels of the LED module are greater than or equal to 0.9 million.

[0014] In any of the above technical solutions, the video projection pixels formed by the projection driving module are greater than or equal to 0.9 million, and the frame rate is greater than or equal to 20 frames per second.

[0015] In another aspect, this application provides a vehicle including a video projection headlight system as described in any of the above technical solutions, and a vehicle central controller, wherein the vehicle central controller outputs the video source data.

[0016] The above-mentioned technical solutions have at least the following advantages or beneficial effects: the video transmission module can receive high-speed video source data through a high-speed connector, thereby improving the pixel and frame rate of the video projection of the projection driver module; the LED module uses a slotted thermoelectric separation PCB, which can adapt to the heat dissipation requirements of the light source generated by megapixel projection, thereby improving the quality of the light source and projection; the deserializer outputs a clock synchronization signal to improve the synchronization of data transmission in the differential video signal, thereby making the synchronization of the video projection image better.

[0017] The above technical solution also has the following advantages or beneficial effects: the Mini-Fakra interface can be adapted to single-ended coaxial cables, reducing the cable cost of video transmission systems. Attached Figure Description

[0018] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0019] Figure 1 This is a schematic diagram illustrating the interaction between the vehicle's central domain controller and the projected headlights.

[0020] Figure 2 This is a block diagram illustrating the principle of video projection.

[0021] Figure 3 This is a schematic diagram of the video transmission module;

[0022] Figure 4 A block diagram of a video projection vehicle lighting system;

[0023] Figure 5 A schematic diagram of the power supply and communication for a video projection vehicle lighting system;

[0024] Figure 6 This is a schematic diagram of a system with a stepper motor module. Detailed Implementation

[0025] To make the objectives, technical solutions, and beneficial effects of this application clearer, the following detailed description, in conjunction with the accompanying drawings and specific embodiments, further illustrates this application. It should be understood that the specific embodiments described in this specification are merely for explaining this application and are not intended to limit it.

[0026] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Traditional headlights only have low beam, high beam, turn signal, and daytime running light functions. The amount of data exchanged between the headlights and the vehicle is only a few bits, so only a few power or data cables are needed to meet the interaction requirements. As headlight functions increase, such as dynamic lighting effects and fault information reporting, the amount of data required for interaction rises to the 10Kbit level. Therefore, LIN bus headlights with an application rate of 10kbps have emerged. For example, adaptive high beams with hundreds of pixels and projection headlights with tens of thousands of pixels require even more data to be exchanged. Therefore, CAN and CAN-FD buses with application rates of 1 to 10Mbps have emerged, which can handle data exchange at the 1 to 5Mbit level. However, neither direct data cabling nor interaction via LIN, CAN, or CAN-FD buses is sufficient to handle the hundreds of megapixel projection headlights' data volume (hundreds of megapixels) while maintaining the smoothness perceived by the human eye. A playback rate of at least 20 frames per second is required. Therefore, the data exchange rate for megapixel projection headlights needs to reach at least 2Gbps. LIN, CAN, and CAN-FD communication buses and cabling do not meet this requirement. Especially at speeds exceeding 100Mbps, the data levels on the communication bus undergo severe distortion, leading to the loss of data frames and consequently, the loss of the projected illumination image. Adding multiple data buses, for example, at 10Mbps for CAN-FD, would require at least 200 CAN-FD communication bus cabling to interact with the vehicle's central domain controller. This would significantly increase the cost of communication transceivers and cabling. Furthermore, the synchronization of video data between multiple data lines becomes more difficult, resulting in inconsistent images from the projected headlights.

[0030] The video projection headlight system provided in this application has a data exchange rate between the vehicle's central domain controller and the projection headlights sufficient to support video projection functionality for headlights with megapixel resolution. Figure 1 This is a schematic diagram illustrating the interaction between the vehicle's central domain controller and the projected headlights, as shown below. Figure 1 As shown, a feasible communication protocol is based on FPD-LINKⅢ, whose bus rate can support 4Gbps data interaction, and the vehicle central domain controller is the video source of the projection headlight.

[0031] Figure 2 A block diagram illustrating the principle of video projection, such as... Figure 2As shown, the video transmission module receives data from the video source and outputs a differential video signal (DV) and a clock synchronization signal (CLK) to the projection driver module. The projection driver module contains a digital micromirror. The device (DMD) outputs LED driving signal D_LED1 and LED power driving signal D_LED2. The LED module receives the LED driving signal D_LED1 and emits a light source to the projection driving module. When the digital micromirrors inside the projection driving module receive and reflect the light source, a video projection is formed. The image quality of the video projection is greater than or equal to 0.9 million pixels and a frame rate greater than or equal to 20 frames per second, preferably 60 frames per second. The LED power driving module receives the LED power driving signal D_LED2 and supplies power to the LED module according to the LED power driving signal D_LED2. The configuration module outputs a configuration signal SET to the video transmission module and the projection driving module to configure the transmission of the differential video signal DV and the clock synchronization signal CLK, and reads the working status information State1 of the video transmission module. The communication rate between the video source and the high-speed connector is greater than or equal to 2Gbps. The LED module includes a slotted thermoelectric separation PCB. In this embodiment, the LED module serves as a projection light source. To achieve high-speed and high-quality projection, a high-quality light source is required for each pixel. When the number of pixels reaches millions, the LED module, due to the use of high-power LEDs, requires a stronger heat dissipation solution. Using a slotted thermoelectric separation PCB can isolate the LED heat source from other components and allow the LED heat dissipation pads to directly contact the copper base at the bottom of the PCB, significantly optimizing the thermal management of the LED module and improving its reliability.

[0032] In the above embodiment, the projection driving module is equipped with megapixel-level digital micromirrors. After the video transmission module processes the video source data into a differential video signal (DV) and transmits it to the projection driving module, the projection driving module receives a low-speed control signal or configuration signal (SET) output by the configuration module, such as a mode selection command, and the differential video signal (DV). This drives the digital micromirrors to operate, controlling the flipping of the micromirror unit corresponding to each pixel, thereby reflecting the light emitted by the LED module and realizing frame-by-frame projection of the video image. Given the requirements of megapixel counts and high frame rate video streams, to improve the smoothness of video projection, the projection driving module is required to perform synchronous processing on the video signal. In this embodiment, a feasible protocol is FPD-LINK III. The deserializer in this protocol framework can output video data and a synchronization signal. The differential video signal (DV) output by the video transmission module includes four pairs of differential video signals, and the synchronization signal is one pair of clock differential signals.

[0033] Figure 3 This is a schematic diagram of a video transmission module, as shown below. Figure 3 As shown, the video transmission module includes a high-speed connector and a deserializer. One feasible high-speed connector is the Mini-Fakra interface, which is suitable for single-ended coaxial cables and can receive high-speed video source data via single-ended coaxial cables, offering lower cost than solutions using shielded twisted-pair cables. After the Mini-Fakra interface transmits FPD-LINK III video data to the deserializer, the deserializer converts the video source data into Open-LDI signals required by the projection driver module based on low-speed control signals in the I2C bus, such as configuration signals. Open-LDI signals are a low-voltage differential signal transmission technology that ensures the synchronization of differential data through a clock synchronization signal. It should be understood that the high-speed connector in this embodiment can also use an HSD (High Speed ​​Data) interface to adapt to shielded twisted-pair cable solutions. In this embodiment, the deserializer can be the DS90UB948, which is compatible with both single-ended coaxial cables and shielded twisted-pair cables.

[0034] Figure 4 A block diagram of a video projection vehicle lighting system, such as... Figure 4 As shown, in Figure 2 Based on the block diagram of the video projection principle shown, a stepper motor module is also included. This stepper motor module is configured to receive a configuration signal SET from the configuration module, which contains projection pre-position information. The configuration module also reads the working state information State2 of the stepper motor module. The configuration module can adjust the configuration signal SET according to the working states of the stepper motor module and the video transmission module, thereby adjusting the working mode of the video projection vehicle lighting system. The stepper motor module is responsible for moving the entire video projection to the pre-position. In one feasible embodiment, the stepper motor in the stepper motor module is mechanically connected to the projection drive module and the LED module, and adjusts the entire video projection to the pre-position by steering.

[0035] Figure 5 A schematic diagram of the power supply and communication for the video projection vehicle lighting system, as shown below. Figure 5 As shown, in this embodiment... Figure 2Based on the schematic diagram shown, the system also includes a CAN communication module and a power supply module. The CAN communication module communicates with the configuration module at low speed to output the configuration signal SET or receive the working status information State from the configuration module, and outputs a power drive signal D_Power. The power supply module receives the power control signal and supplies power to the configuration module, video transmission module, projection driver module, and LED power driver module. One feasible power supply scheme is that the power supply module outputs four different power supply lines V1-V4 to power the configuration module, video transmission module, projection driver module, and LED power driver module respectively. The LED power driver module outputs V5 to power the LED module. It should be understood that the power supply lines output by the power module in this embodiment are options that can be configured by those skilled in the art based on the actual device, and V1-V5 are only markings for different power supply lines described in this application and do not represent differences in actual voltage levels.

[0036] Figure 6 A schematic diagram of a system with a stepper motor module, such as Figure 6 As shown, in this embodiment, based on the above embodiment, the power supply module also outputs a power supply line V6 to supply power to the stepper motor module.

[0037] This application also provides a vehicle, which includes at least a vehicle central domain controller and a video projection headlight system as described in any of the above embodiments, wherein the vehicle central domain controller outputs video source data.

[0038] The above description is only intended to help understand the method, structure, and core ideas of the technical solution of this application. For those skilled in the art, various improvements and modifications can be made to this application without departing from the technical principles thereof, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A video projection vehicle lighting system, characterized in that, include: The video transmission module includes a high-speed connector and a deserializer. The high-speed connector is used to receive video source data and transmit the video source data to the deserializer. The deserializer outputs a differential video signal and a clock synchronization signal. The projection driver module has a digital micromirror inside. The projection driver module receives the differential video signal and clock synchronization signal output by the deserializer, and outputs LED driving signal and LED power driving signal. The LED module receives the LED driving signal and emits a light source to the digital micromirrors in the projection driving module to form a video projection. The LED power driver module receives the LED power driver signal and supplies power to the LED module. The configuration module outputs configuration signals to the video transmission module and the projection driver module, and reads the working status information of the video transmission module; Wherein, the communication rate between the video source and the high-speed connector is greater than or equal to 2Gbps; The LED module includes a slotted thermoelectric separation PCB.

2. The video projection vehicle lighting system as described in claim 1, characterized in that, Also includes: A stepper motor module, having a stepper motor, is configured to receive a configuration signal from the configuration module; The configuration module also reads the working status information of the stepper motor module; The configuration signal received by the stepper motor module contains projection predetermined position information, and the stepper motor moves the video projection to the projection predetermined position.

3. The video projection vehicle lighting system as described in claim 1, characterized in that, The data transmission rate between the high-speed connector and the deserializer is greater than or equal to 3Gbps.

4. The video projection vehicle lighting system as described in claim 1, characterized in that, The video source data is transmitted to the high-speed connector via a single-ended coaxial cable or a twisted-pair shielded cable.

5. The video projection vehicle lighting system as described in claim 1, characterized in that, The high-speed connector is a Mini-Fakra interface or an HSD interface.

6. The video projection vehicle lighting system as described in claim 2, characterized in that, Also includes: The CAN communication module communicates with the configuration module at low speed to output the configuration signal and read the working status information, and outputs the power drive signal; The power module receives the power drive signal and supplies power to the configuration module, video transmission module, projection drive module, LED power drive module and stepper motor module.

7. The video projection vehicle lighting system as described in claim 1, characterized in that, The video transmission module receives video data in FPD-LINK III format.

8. The video projection vehicle lighting system as described in claim 1, characterized in that, The LED module has a light source pixel count greater than or equal to 0.9 million.

9. The video projection vehicle lighting system as described in claim 1, characterized in that, The video projection generated by the projection driving module has a resolution of 0.9 million pixels or more and a frame rate of 20 frames per second or more.

10. A vehicle, characterized in that, Includes the video projection vehicle lighting system as described in any one of claims 1-9, and a vehicle central controller, wherein the vehicle central controller outputs the video source data.

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