Automobile atmosphere lamp

Abstract

The utility model discloses a low -cost, miniaturization car atmosphere lamp, including the mutual connection of one main node, a plurality of intermediate slave nodes and an end slave node, the main node includes main interface layer, and the intermediate slave node includes main interface layer and slave interface layer, and the end slave node includes slave interface layer, adjacent main node with intermediate slave node, between adjacent intermediate slave node and between adjacent intermediate slave node and end slave node, all adopt the plug -in connection of main interface layer and slave interface layer. The utility model has the advantages and effects that: 1. size reduction: module overall size 15mm 10mm 3mm, reduce about 80% than traditional separate scheme, 2. cost reduction: save independent LIN transceiver and MCU, and single module BOM cost drops 45%, 3. network elasticity: when any node failure, the subsequent node is automatically skipped and maintains communication (adopts chain topology).

Description

Technical Field

[0001] The present utility model relates to the technical field of automotive ambient lights, in particular to an automotive ambient light. Background Art

[0002] With the development of automotive intelligentization, ambient lights have evolved from single-area lighting to full-cabin multi-node linkage. The prior art has the following problems: 1. Volume limitation: Traditional ambient light modules occupy large space due to discrete components (such as MCU, LIN transceivers, and power modules), making it difficult to achieve hidden installation (such as in door gaps and instrument panel joints); 2. Complex wiring: When using CAN bus networking, a gateway module needs to be configured, which leads to increased wiring harness costs; 3. Poor scalability: The fixed connector design requires re-wiring when adding new nodes, and cannot flexibly increase or decrease the number of light bodies.

[0003] Aiming at the above pain points, the present utility model proposes an innovative solution integrating an SBC chip, adopting dual connector cascade interfaces for intermediate slave nodes, and using the LIN communication protocol.

[0004] In view of this, the present utility model is proposed. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a miniaturized automotive ambient light module (comprising a master node, intermediate slave nodes and a terminal slave node) that can be conveniently cascaded, and realize low-cost and high-flexibility full-vehicle ambient light networking through hardware integration and topology optimization.

[0006] The above technical object of the present utility model is achieved through the following technical solution: an automotive ambient light, comprising one master node, a plurality of intermediate slave nodes and one terminal slave node connected to each other; the master node comprises a master interface layer, the intermediate slave node comprises a master interface layer and a slave interface layer, and the terminal slave node comprises a slave interface layer; between adjacent master node and intermediate slave node, between adjacent intermediate slave nodes, and between adjacent intermediate slave node and terminal slave node, plug connection is adopted through the master interface layer and the slave interface layer.

[0007] Further provided: the master interface layer is an input end, comprising a power line, a ground line and LIN_Slave; the slave interface layer is an output end, comprising a power line, a ground line and LIN_Master.

[0008] Further provided: the master node, the intermediate slave nodes and the terminal slave node all comprise a core layer, an optical layer is arranged on the core layer, and the core layer and the optical layer are covered with a protective layer.

[0009] Further provided: the core layer comprises an SBC chip welded on a 2-layer PCB board; The optical layer includes tri-color RGB LEDs, covered with a light guide strip made of light-guiding material; The protective layer is an outer shell that encloses the main body of the module, and the outer shell has a light guide strip opening.

[0010] Further configuration: The bottom layer of the core layer is covered with a copper foil heat dissipation area, and the coverage of the copper foil heat dissipation area is ≥30%.

[0011] In summary, this utility model has the following beneficial effects: 1. Size reduction: The overall module size is 15mm × 10mm × 3mm, which is about 80% smaller than the traditional discrete solution; 2. Cost reduction: By eliminating the need for a separate LIN transceiver and MCU, the BOM cost per module is reduced by 45%; 3. Network resilience: When any node fails, subsequent nodes automatically skip the interruption point and maintain communication (using a chain topology). Attached Figure Description

[0012] Figure 1 A schematic diagram of a cascaded master and slave node configuration; Figure 2 This is a schematic diagram of the module's hardware structure. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings.

[0014] An automotive ambient light includes an SBC chip, which integrates an MCU, a LIN transceiver, a power module, and control units such as GPIO and PWM to directly drive the node where the LED is located.

[0015] In the automotive ambient light claimed in this application, the nodes include a master node, intermediate slave nodes and end slave nodes, with one master node and one end slave node, and the number of intermediate slave nodes can be set according to specific settings.

[0016] The master node includes a master interface layer, intermediate slave nodes include both a master interface layer and a slave interface layer, and the terminal slave node includes a slave interface layer. Adjacent master nodes and intermediate slave nodes, adjacent intermediate slave nodes, and adjacent intermediate slave nodes and terminal slave nodes are all connected via plug-in connections using the master interface layer and the slave interface layer. Preferably, the master interface layer uses a male connector, and the slave interface layer uses a female connector.

[0017] The master node, intermediate slave node and end slave node all include a core layer. The specific structure of the core layer is an SBC chip soldered to a 2-layer PCB board. The bottom layer of the core layer is covered with a copper foil heat dissipation area with a coverage of ≥30%.

[0018] An optical layer is set on the core layer. The optical layer uses a tri-color RGB LED, which is connected to the SBC chip. A light guide strip made of PC material covers the optical layer.

[0019] The core layer and optical layer are covered with a protective layer, and the protective layer has openings for light guide strips to be embedded.

[0020] The master interface layer is the input terminal, including power supply, ground wire, and LIN_Slave; the slave interface layer is the output terminal, including power supply, ground wire, and LIN_Master.

[0021] This solution consists of three core technologies: 1. SBC chip integration design • If you choose iND83209, Melexis MLX81115, or ELMOSE521.36, etc., they can integrate MCU, LIN transceiver, power module, and GPIO, PWM and other control units; • Directly drives 3 to 6 LEDs, eliminating the need for external driver circuitry; • Operating voltage range 8-18V, adaptable to vehicle power fluctuations.

[0022] 2. Dual-connector cascade structure The output end uses a female connector, and the input end uses a male connector.

[0023] (1) The main node has standardized connectors on one side: Output terminals: power supply, ground, LIN_Master, which transmits the processed LIN bus signals to the next node (device).

[0024] (2) Standardized connectors are set on both sides of the central node: Input terminals: power supply, ground, LIN_Slave, for receiving LIN bus signals; Output terminals: power supply, ground, LIN_Master, which transmits the processed LIN bus signals to the next node (device).

[0025] (3) Standardized connectors are installed on one side of the end node: Input terminals: power supply, ground, LIN_Slave, for receiving LIN bus signals; 3. LIN bus dynamic networking method Master-slave architecture: A single master node can manage 15 slave nodes through cascading. If the number of slave nodes is increased through the LIN cascading driver, it can manage up to 64 slave nodes. Plug and play: New nodes broadcast ID requests via LIN messages, and the master node assigns a unique identifier (0x01-0x40). Data compression: Color instructions are encoded in RGB565 format (2 bytes), saving 33% bandwidth compared to the traditional RGB888 format.

[0026] The cascading network implementation process in this application includes three parts: initial wiring, node registration, and command transmission. 1. Initial wiring: The master node's output terminal LIN_Master is connected to the first slave node's input terminal LIN_Salve; The output terminal LIN_Master of the first slave node is connected to the input terminal LIN_Salve of the next slave node, and so on; 2. Node Registration: The master node sends a special LIN instruction to perform an "ID allocation" instruction (such as frame ID 0x3C). Unregistered modules reply with an "ID request" message (data field filled with 0xFF), and the master node allocates valid IDs in sequence; 3. Command transmission: The master node sends a global color command (frame ID 0x20), and the data field contains: Target ID (1 byte): 0x00 indicates broadcast, 0x01-0x40 indicates single node; RGB values ​​(2 bytes): R (5 bits), G (6 bits), B (5 bits); After parsing the instructions from the node, the ambient light LED output is controlled by adjusting the PWM.

[0027] This application includes a fault-tolerant mechanism, including: 1. Physical layer redundancy: Each node module has a built-in TVS diode to prevent surge voltage from propagating along the cascaded lines; 2. Communication layer self-healing function: The master node sends a heartbeat detection command (frame ID 0x3E) every 5 seconds; the slave node is marked as failed after 3 unresponsive attempts, and subsequent commands skip this node ID; Furthermore, after the faulty module is removed, the downstream module automatically requests ID reassignment from the upstream module.

[0028] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An automotive ambient light, characterized in that: It includes a master node, several intermediate slave nodes and a terminal slave node that are interconnected; the master node includes a master interface layer, the intermediate slave nodes include a master interface layer and a slave interface layer, and the terminal slave node includes a slave interface layer; adjacent master nodes and intermediate slave nodes, adjacent intermediate slave nodes and terminal slave nodes are all connected by plugging in the master interface layer and the slave interface layer.

2. The automotive ambient light according to claim 1, characterized in that: The master interface layer is the input terminal, including power supply, ground wire, and LIN_Slave; the slave interface layer is the output terminal, including power supply, ground wire, and LIN_Master.

3. The automotive ambient light according to claim 1, characterized in that: The master node, intermediate slave node and end slave node all include a core layer, an optical layer is provided on the core layer, and the core layer and optical layer are covered with a protective layer.

4. The automotive ambient light according to claim 3, characterized in that: The core layer includes an SBC chip soldered to a two-layer PCB board; the optical layer includes a three-color RGB LED covered with a light guide strip; the protective layer is an outer shell that wraps around the main body of the module, and the outer shell has openings for the light guide strip.

5. The automotive ambient light according to claim 4, characterized in that: The bottom layer of the core layer is covered with a copper foil heat dissipation area, and the coverage of the copper foil heat dissipation area is ≥30%.

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