LiDAR Transceiver Board Structure for Side-Mounted Diode Alignment
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Solution Overview
Problem
The existing board structure for LiDAR devices, designed for TO CAN-type laser diodes, is not suitable for surface-mount diodes due to structural limitations, particularly in aligning with lenses positioned on the side direction, necessitating a new design that facilitates easy installation and alignment of surface-mount diodes.
Innovation Solution
A board structure featuring a lens barrel with a movable lens, a guide barrel with connecting parts, and a transmission/reception board supported by a support member, allowing for precise alignment and secure mounting of surface-mount diodes, including a damper for shock absorption and multiple connection points for alignment in both x-axis and y-axis directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate frame is installed on the upper surface of the transmission/reception board for TO CAN-type laser diodes, then the emission and reception directions of optical signals can be properly configured, but the structure cannot accommodate surface-mount diodes which require lenses positioned in the side direction
Solution Approach 1:
The board structure is divided into separate functional modules: a transmission board for emitting optical signals and a reception board for receiving optical signals. Each board has its own mounting structure optimized for its specific function. The transmission board includes a transmission diode mounting structure with a lens positioned in the side direction, while the reception board includes a reception diode mounting structure with a lens positioned in the side direction. This segmentation allows each module to be independently optimized for different diode types.
Solution Approach 2:
The patent creates a universal mounting structure that can accommodate both TO CAN-type laser diodes and surface-mount diodes. The transmission board and reception board each feature versatile mounting structures with side-positioned lenses that work with surface-mount diodes, while maintaining compatibility with traditional TO CAN-type diodes through appropriate configuration. This multi-functionality resolves the contradiction by making the board structure adaptable to different diode types without requiring complete structural redesign.
2Power
If the lens is positioned in the side direction for surface-mount diodes, then the rising time and power of emitted optical signals can be improved, but the conventional upper surface mounting structure is no longer suitable
Solution Approach 1:
The patent transitions from the conventional upper-surface lens mounting (z-dimension) to side-direction lens positioning (x or y dimension). The transmission board includes a transmission diode mounting structure with a lens positioned in the side direction, and the reception board includes a reception diode mounting structure with a lens positioned in the side direction. This dimensional change enables surface-mount diode configuration while maintaining ease of manufacture through standardized side-mounting procedures.
3Manufacturing precision
If a new board structure is developed for surface-mount diodes with side-positioned lenses, then alignment between the transmission/reception board and lens barrel can be improved, but the structure deviates from conventional designs
Solution Approach 1:
The patent incorporates preliminary alignment features directly into the mounting structures. The transmission board and reception board include positioning protrusions and corresponding positioning grooves that pre-align the boards with the lens barrels before final assembly. This preliminary action ensures precise alignment between the transmission/reception boards and lens barrels, achieving high manufacturing precision while maintaining relatively simple structures through intuitive alignment mechanisms.
Data Source
AI summary
The board structure for transmitting and receiving in a lidar device according to the present disclosure is installed in the lidar device, and includes a lens barrel having a lens mounted on a first inner circumferential surface so as to be movable, and having at least one first connection part provided on a first outer circumferential surface; a guide barrel having at least one second connection part connected to the first connection part on a second outer circumferential surface, and having a first fixing hole formed to penetrate from the second outer circumferential surface to a second inner circumferential surface; a transmission/reception board having a diode mounted on a part of an upper surface and at least partially inserted into an inner space of the guide barrel; and a first support member that penetrates through the first fixing hole and supports an upper surface or lower surface of the transmission/reception board.