Front light-emitting starry sky glass controller for automobile sunroof

Abstract

The utility model relates to the field of automobile interiors, and discloses an automobile sunroof front light-emitting type starry sky glass controller which comprises a lamp strip controller. And the lamp strip module is connected with the lamp strip controller through the CAN physical layer, the lamp strip module comprises a plurality of lamp strips, a plurality of lamp beads capable of being independently controlled are distributed on each lamp strip, and the lamp beads are connected in a daisy chain communication mode. According to the utility model, by optimizing the hardware design, the high integration of the starry sky roof control device is realized, and by integrating the advanced microprocessor unit, the driving circuit and the control circuit, the number of hardware components can be obviously reduced, the system structure is simplified, and the design complexity and the manufacturing cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive interiors, and in particular to a front-lit starry sky glass controller for automotive sunroofs. Background Technology

[0002] With the rapid development of the automotive industry and the increasing demands of consumers for the quality of car interiors, in-car ambient lighting systems have gradually become an important element in enhancing the luxury and passenger experience of vehicles. As a type of in-car ambient lighting, starry sky ceilings simulate the effect of stars in the night sky, bringing passengers a romantic and comfortable visual experience, and are therefore highly favored by the market.

[0003] Existing starry sky ceiling control devices generally have low integration and relatively complex hardware designs, making it impossible to control each LED individually. As a result, the system cannot achieve more flexible and varied lighting effects. If each LED is controlled individually, separate drive and control circuits are required, which not only increases the complexity and design difficulty of the system but also leads to an increase in overall cost and reduces the reliability and stability of the system. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing starry sky roof control devices generally have low integration levels and relatively complex hardware designs, making it impossible to control each LED individually and preventing the system from achieving more flexible and varied lighting effects. To address the shortcomings of existing technologies, this invention provides a front-illuminated starry sky glass controller for automotive sunroofs.

[0005] The present invention adopts the following technical solution to solve the above-mentioned technical problems.

[0006] A front-lit starry sky glass controller for automotive sunroof includes: a light strip controller; and a light strip module. The light strip module is connected to the light strip controller via a CAN physical layer. The light strip module includes multiple light strips, each with several independently controllable LEDs distributed on it. The LEDs are connected to each other via a daisy-chain communication method.

[0007] Preferably, the light strip controller is connected to the control terminal via a wiring harness. The control terminal sends vehicle power and LIN commands to the light strip controller. The light strip controller receives the LIN commands from the control terminal, sends control signals to the light strip, and supplies power to the light strip. The light strip controller includes a power conversion unit installed inside the light strip controller. The power conversion unit is connected to the control terminal. The light strip module is connected to the power conversion unit. The power conversion unit converts the received 12V power to 5V to power the MCU and the light strip module.

[0008] Preferably, the light strip controller further includes a LIN communication unit installed inside the light strip controller. The LIN communication unit is connected to the control terminal and is used to receive LIN commands sent by the control terminal through the wiring harness, convert the LIN commands into serial communication format, and establish communication with the control terminal.

[0009] Preferably, the light strip controller further includes an SPI communication unit installed inside the light strip controller. The light strip module is connected to the SPI communication unit, which is used to convert the SPI signal into a differential signal and send it to the light strip module through the CAN physical layer.

[0010] Preferably, the light strip controller further includes:

[0011] A CAN communication unit is installed inside the LED strip controller. The CAN communication unit is connected to the SPI communication unit. The CAN communication unit is used to convert the signal sent by SPI into a low-voltage differential signal that can be recognized by the LED beads through the CAN physical layer.

[0012] Preferably, the light strip includes:

[0013] A CAN transceiver is installed inside the light strip. The CAN transceiver is connected to the CAN communication unit and is used to enhance low-voltage differential signals through the CAN physical layer.

[0014] Preferably, the light strip further includes:

[0015] The RGB driver is installed inside the LED beads of the LED strip.

[0016] Preferably, the light strip controller further includes:

[0017] A power interface is located on the light strip controller, and the power interface is used to receive vehicle power.

[0018] The LIN communication interface is located on the light strip controller and is used to receive LIN commands to enable communication with the vehicle control system.

[0019] Preferably, the light strip controller further includes a microprocessor unit installed within the light strip controller. The microprocessor unit is used to process received LIN commands and ambient effect instructions issued by the user, and to generate control signals.

[0020] Preferably, the light strip controller further includes a voltage regulator installed within the light strip controller. The voltage regulator is connected to the microprocessor unit and is used to provide 5V power to the MCU.

[0021] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0022] (1) By optimizing the hardware design, the starry sky top control device has been highly integrated. By integrating advanced microprocessor units, drive circuits and control circuits, this solution can significantly reduce the number of hardware components, simplify the system structure, and reduce design complexity and manufacturing costs.

[0023] (2) It can achieve individual control of each LED bead. By using differential signals, it ensures that the control signal is transmitted to each LED bead stably and efficiently, achieving precise control and supporting more flexible and varied lighting effects. Users can achieve personalized lighting effects according to their personal preferences or scene requirements.

[0024] (3) It has strong scalability. The LEDs communicate with each other using Manchester encoding, which makes the communication faster and allows for the expansion of more LEDs. It is also robust. Due to the high integration of the circuit, the circuit system has strong anti-interference ability and better overall stability during operation. Attached Figure Description

[0025] Figure 1 This is a block diagram of the architecture of a front-lit starry sky glass controller for an automotive sunroof according to the present invention.

[0026] Figure 2 This is a block diagram of the control terminal of a front-lit starry sky glass controller for an automotive sunroof according to this utility model;

[0027] Figure 3 This is a block diagram of a light strip controller for a front-lit starry sky glass controller for an automotive sunroof, according to this utility model.

[0028] Figure 4 This is a block diagram of the light strip module of a front-lit starry sky glass controller for an automotive sunroof according to this utility model;

[0029] The accompanying figures are labeled as follows:

[0030] 100, Control terminal; 200, LED strip controller; 300, LED strip module. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0032] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] Reference Figures 1-4A front-lit starry sky glass controller for automotive sunroofs includes: a light strip controller 200; and a light strip module 300, wherein the light strip module 300 is connected to the light strip controller 200 via a CAN physical layer, and the light strip module 300 includes multiple light strips, with the LEDs connected to each other via a daisy-chain communication method.

[0034] The LED strip controller 200 connects to the CAN transceiver in the LED strip module 300 via multiple CAN interfaces such as L_CAN_H, L_CAN_L, R_CAN_H, and R_CAN_L to achieve high-speed and reliable data exchange. The LED strip controller 200 is developed based on the S32K118 platform, which provides powerful processing capabilities and rich peripheral interfaces, making it very suitable for complex control systems in automotive and industrial applications. The LED strip controller 200 also communicates with the vehicle via a LIN bus for command transmission and signal exchange. The LIN bus is a low-cost serial communication protocol suitable for simple, low-speed communication and is commonly used in automotive auxiliary control.

[0035] The LED strips use Osram's proprietary E3731i protocol for communication, ensuring stable and efficient communication between the strips and the controller, providing a foundation for independent control of each LED. The LEDs are connected via a daisy-chain communication method, allowing signals to be transmitted from one strip to the next, thus achieving unified control of all strips. Thanks to proprietary low-voltage differential signaling technology, this communication method also boasts strong anti-interference capabilities and long transmission distances. Based on the daisy-chain communication method, the system can independently control the color and brightness of each LED. This precise control allows for more diverse and personalized lighting effects, meeting the lighting needs of different scenarios.

[0036] The LED strip controller 200 is connected to the control terminal 100 via a wiring harness. The control terminal 100 sends vehicle power and LIN commands to the LED strip controller 200. The LED strip controller 200 receives LIN commands from the control terminal 100. The LED strip controller 200 sends control signals to the LED strip and supplies power to the LED strip. The LED strip controller 200 includes a power conversion unit installed inside the LED strip controller 200 and connected to the control terminal 100. The LED strip module 300 is connected to the power conversion unit. The power conversion unit converts the received 12V power to 5V to power the MCU and the LED strip module 300.

[0037] The LED strip controller 200 also includes a LIN communication unit, which is installed inside the LED strip controller 200. The LIN communication unit is connected to the control terminal 100. The LIN communication unit is used to receive LIN commands sent by the control terminal 100 through the wiring harness and convert the LIN commands into serial communication form to establish communication with the control terminal 100.

[0038] The LED strip controller 200 also includes an SPI communication unit installed inside the LED strip controller 200. The LED strip module 300 is connected to the SPI communication unit. The SPI communication unit is used to convert the SPI signal into a differential signal and send it to the LED strip module 300 through the CAN physical layer.

[0039] The LED strip controller 200 also includes a CAN communication unit, which is installed inside the LED strip controller 200. The CAN communication unit is connected to the SPI communication unit. The CAN communication unit is used to convert the signal emitted by SPI into a low-voltage differential signal that can be recognized by the LED beads through the physical layer of CAN.

[0040] The light strip includes: a CAN transceiver installed inside the light strip, which is connected to a CAN communication unit and is used to enhance low-voltage differential signals through the CAN physical layer; and an RGB driver installed inside the LEDs of the light strip. After receiving CAN commands from the controller, the light strip converts these commands into Manchester encoding to control each LED. Manchester encoding is a binary encoding method commonly used for data transmission and synchronization control. After each LED identifies its own address, the driver integrated into the LED automatically generates the corresponding PWM pulse width modulation signal to achieve the required brightness and color effects. During operation, each LED also transmits its current operating information to the LEDs behind it in Manchester encoding so that the controller can monitor the operating status of each LED.

[0041] The light strip controller 200 also includes: a power interface, which is disposed on the light strip controller 200 and is used to receive vehicle power; and a LIN communication interface, which is disposed on the light strip controller 200 and is used to receive LIN commands to realize communication with the vehicle control system.

[0042] The LED strip controller 200 also includes: a microprocessor unit installed inside the LED strip controller 200, which is used to process received LIN commands and ambient effect instructions issued by the user and generate control signals; and a voltage regulator installed inside the LED strip controller 200, which is connected to the microprocessor unit and is used to provide 5V power to the MCU.

[0043] During operation, the control terminal 100 and the light strip controller 200 are first physically connected via a wiring harness. After connection, the control terminal 100 sends the vehicle power supply and LIN commands to the light strip controller 200 via the wiring harness. Upon receiving the vehicle's 12V power supply, the light strip controller 200 converts the voltage to 5V through its internal power conversion unit to power the microprocessor unit and the entire light strip system. The LIN communication unit on the light strip controller 200 receives LIN commands from the control terminal 100 and converts them into serial communication format to establish a more stable communication connection with the control terminal 100. Users can send desired ambient effect commands to the light strip through the interface of the control terminal 100 or the controller. After receiving the desired ambient effect command, the controller sends the control signal of the light strip through the physical layer of SPI communication. Since the signal capability of SPI communication is relatively weak, signal loss or attenuation may occur during long-distance communication. To solve the signal loss problem of SPI communication in long-distance communication, CAN communication is used. The LED strip converts SPI communication signals into CAN communication signals. CAN communication has higher signal strength and anti-interference capabilities, ensuring the stability and reliability of signals during long-distance transmission. After receiving the CAN command from the controller, the LED strip converts the CAN signal into Manchester encoding through its internal CAN transceiver. Manchester encoding is a binary encoding method commonly used for data transmission and synchronization control. It ensures stable and efficient communication between the LED strip and the controller. After each LED identifies its own address, the driver integrated into the LED automatically generates the corresponding PWM (Pulse Width Modulation) signal. The PWM signal is used to control the brightness and color effect of the LED to achieve the desired ambient effect. During operation, each LED also transmits its current operating information to the LED or controller in Manchester encoding. By receiving this feedback information, the controller can monitor the operating status of each LED, including whether it is working normally or whether a fault has occurred. During the operation of the entire control system, the LED strip controller 200 continuously monitors the working status of each component.

[0044] In summary, compared with existing technologies, it has the following beneficial effects:

[0045] By optimizing the hardware design, the starry sky top control device has achieved a high degree of integration. By integrating advanced microprocessor units, drive circuits, and control circuits, this solution can significantly reduce the number of hardware components, simplify the system structure, and reduce design complexity and manufacturing costs.

[0046] This solution enables individual control of each LED. By utilizing the physical layer of CAN, it ensures stable and efficient transmission of control signals to each LED, achieving precise control and supporting more flexible and varied lighting effects. Users can create personalized lighting effects according to their personal preferences or scene requirements.

[0047] This solution is highly scalable, uses Manchester encoding to communicate with each other, resulting in faster communication speeds, the ability to support more LEDs, strong robustness, and a high degree of circuit integration, which enhances the system's anti-interference capabilities and overall stability during operation.

[0048] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0049] Secondly, the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0050] Finally, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A front-lit starry sky glass controller for a car sunroof, characterized in that, include: LED strip controller (200); The light strip module (300) is connected to the light strip controller (200) via the CAN physical layer. The light strip module (300) includes multiple light strips, each of which has several independently controllable LED beads distributed on it. The LED beads are connected to each other via a daisy-chain communication method.

2. A front-lit starry sky glass controller for an automotive sunroof according to claim 1, characterized in that: The light strip controller (200) is connected to the control terminal (100) via a wiring harness. The control terminal (100) sends vehicle power and LIN commands to the light strip controller (200). The light strip controller (200) receives LIN commands from the control terminal (100), sends control signals to the light strip, and supplies power to the light strip. The light strip controller (200) includes: A power conversion unit is installed inside the LED strip controller (200). The power conversion unit is connected to the control terminal (100). The LED strip module (300) is connected to the power conversion unit. The power conversion unit is used to convert the received 12V power to 5V to power the MCU and the LED strip module (300).

3. A front-lit starry sky glass controller for an automotive sunroof according to claim 1, characterized in that: The light strip controller (200) also includes: The LIN communication unit is installed inside the light strip controller (200). The LIN communication unit is connected to the control terminal (100). The LIN communication unit is used to receive LIN commands sent by the control terminal (100) through the wiring harness and convert the LIN commands into serial communication form to establish communication with the control terminal (100).

4. A front-lit starry sky glass controller for an automotive sunroof according to claim 1, characterized in that: The light strip controller (200) also includes: An SPI communication unit is installed inside the LED strip controller (200). The LED strip module (300) is connected to the SPI communication unit. The SPI communication unit is used to convert the SPI signal into a differential signal and send it to the LED strip module (300) through the CAN physical layer.

5. A front-lit starry sky glass controller for an automotive sunroof according to claim 4, characterized in that: The light strip controller (200) also includes: A CAN communication unit is installed inside the LED strip controller (200). The CAN communication unit is connected to the SPI communication unit. The CAN communication unit is used to convert the signal emitted by SPI into a low-voltage differential signal that can be recognized by the LED beads through the physical layer of CAN.

6. A front-lit starry sky glass controller for an automotive sunroof according to claim 1, characterized in that: The light strip includes: A CAN transceiver is installed inside the light strip. The CAN transceiver is connected to the CAN communication unit and is used to enhance low-voltage differential signals through the CAN physical layer.

7. A front-lit starry sky glass controller for an automotive sunroof according to claim 6, characterized in that: The light strip also includes: The RGB driver is installed inside the LED beads of the LED strip.

8. A front-lit starry sky glass controller for an automotive sunroof according to claim 1, characterized in that: The light strip controller (200) also includes: A power interface is provided on the light strip controller (200), and the power interface is used to receive vehicle power. The LIN communication interface is located on the light strip controller (200) and is used to receive LIN commands to achieve communication with the vehicle control system.

9. A front-lit starry sky glass controller for an automotive sunroof according to claim 3, characterized in that: The light strip controller (200) also includes: A microprocessor unit is installed inside the light strip controller (200). The microprocessor unit is used to process received LIN commands and ambient effect instructions issued by the user, and generate control signals.

10. A front-lit starry sky glass controller for an automotive sunroof according to claim 9, characterized in that: The light strip controller (200) also includes: A voltage regulator is installed inside the LED strip controller (200) and is connected to the microprocessor unit. The voltage regulator is used to provide 5V power to the MCU.

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