Optical Transceiver FPC Board Integration for Assembly Tolerance
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Solution Overview
Problem
Conventional optical transceivers with multiple receivers and transmitters face complex optical coupling and electrical connection challenges, leading to reliability issues and increased manufacturing time due to intricate flexible printed circuit (FPC) board arrangements.
Innovation Solution
The optical transceiver employs a single FPC board with a center portion and branches that follow the shape of optical units, simplifying connections by using a unified portion with creases and notches, and via holes for lead pins, enhancing assembly tolerance and reducing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate FPC boards are used to connect each optical device to the circuit board, then each optical device can be independently connected, but the FPC board arrangement becomes complex, degrading reliability and prolonging manufacturing time
Solution Approach 1:
The patent combines multiple separate FPC boards into a single integrated FPC board that connects multiple optical devices (transmitters and receivers) to the circuit board. This unified FPC board has a main body portion and multiple branch portions, where each branch connects to a specific optical device. This merging approach maintains the independent connection capability while significantly simplifying the overall arrangement, reducing complexity, and improving reliability by eliminating multiple separate connection paths.
Solution Approach 2:
The single FPC board is segmented into functional portions: a main body portion and multiple branch portions. Each branch portion is specifically designed to connect to a particular optical device, allowing independent routing and connection while maintaining a unified structure. This segmentation enables the FPC board to handle multiple connections efficiently without the complexity of multiple separate boards.
2Manufacturing precision
If optical devices are fixed to the optical unit with specific angles independent of each device, then each device can be positioned precisely, but the FPC board drawing becomes complex and manufacturing time increases
Solution Approach 1:
The FPC board is pre-designed with specific branch portions that correspond to the predetermined angles and positions of optical devices within the optical unit. The branch portions are configured in advance to match the angular positions of transmitters and receivers, allowing for quick and accurate assembly without requiring complex on-site adjustments or drawings. This preliminary design of the FPC board structure enables precise positioning while significantly reducing manufacturing time.
3Area of stationary object
If components are arranged compactly to fit standard housing dimensions, then the transceiver meets size standards, but optical coupling between components becomes complex and electrical connection is restricted
Solution Approach 1:
The patent utilizes three-dimensional spatial arrangement within the optical unit, positioning optical devices at specific angles and locations that optimize both compactness and connectivity. The FPC board is routed through the optical unit in a manner that navigates the limited space efficiently, with branch portions extending to each optical device without creating excessive complexity. This dimensional approach allows the transceiver to meet standard housing dimensions while maintaining manageable optical coupling and electrical connection pathways.
Data Source
AI summary
The present invention provides an optical transceiver with a function of the wavelength division multiplexing. The transceiver includes a receiver optical unit, a transmitter optical units and a substrate. Both optical unit includes a plurality of receiver optical subassemblies (ROSAs) or a plurality of transmitter optical subassemblies (TOSAs) and a plurality of wavelength selective filters. The ROSAs or the TOSAs in respective optical units is electrically connected with the circuit on the substrate by the flexible printed circuit (FPC) board with a plurality of branches, each connected to the ROSAs or the TOSAs, and a connecting portion fixed to the substrate.