Spiral Flexible Board for Monitoring Camera Signal Transmission
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Solution Overview
Problem
Conventional monitoring camera apparatuses face high manufacturing costs and failure rates due to the use of coaxial cables, which are prone to damage and abrasion when the lens is rotated, affecting high-speed signal transmission.
Innovation Solution
A monitoring camera apparatus utilizing a spiral flexible board for signal transmission, where the flexible board is electrically connected to both the main and sensing circuit boards, allowing for adjustments in rotary and inclined angles without damaging the signal transmission medium, and can be processed via thermoplastic procedures to accommodate lens movement while providing electromagnetic interference protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coaxial cable is used for signal transmission between the main circuit board and the sensing circuit board, then high-speed signal transmission can be achieved, but the cable is prone to damage and abrasion when the lens is rotated, resulting in high failure rate
Solution Approach 1:
The patent replaces the mechanical coaxial cable system with a flexible printed circuit board (FPC) system. The FPC uses flexible rigid patterns and via holes to establish electrical connections, eliminating the mechanical cable that is susceptible to abrasion and damage during lens rotation. This substitution maintains signal transmission functionality while dramatically improving durability.
Solution Approach 2:
The FPC is designed with flexible sections that can dynamically accommodate the rotation and movement of the lens assembly. The flexible rigid patterns allow the circuit board to bend and flex without damaging the electrical connections, enabling the system to adapt to changing mechanical configurations during operation.
2Reliability
If a coaxial cable is used for signal transmission, then high-speed signal transmission is possible, but the manufacturing cost increases
Solution Approach 1:
The patent employs a flexible printed circuit board which is significantly cheaper to manufacture than coaxial cables. The FPC can be mass-produced using standard PCB fabrication processes, eliminating the need for expensive cable assemblies while maintaining the required signal transmission performance for the application.
Solution Approach 2:
The invention changes the fundamental parameter of the connection medium from a flexible cable to a rigid-flexible hybrid circuit board. This parameter change enables the use of standard PCB manufacturing techniques, dramatically reducing production costs while achieving the same electrical connection function.
3Adaptability or versatility
If the lens is rotated to acquire wide-view images, then the field of view is improved, but the coaxial cable is shaken and damaged
Solution Approach 1:
The flexible rigid patterns in the FPC are designed to dynamically accommodate the full range of lens rotation movements. The flexible sections allow the circuit board to bend and flex as the lens rotates, maintaining electrical connectivity throughout the entire motion range without cable damage.
Solution Approach 2:
The FPC is divided into rigid sections for stable electrical connections and flexible sections for accommodating movement. This segmentation allows different parts of the circuit board to perform different functions - the rigid parts maintain signal integrity while the flexible parts absorb the mechanical stress of lens rotation.
Data Source
AI summary
A monitoring camera apparatus includes a main circuit board, a sensing circuit board, an adjusting mechanism and a spiral flexible board. The main circuit board includes an image processor. The sensing circuit board includes an image sensor. The adjusting mechanism is connected to the sensing circuit board for adjusting position of the sensing circuit board and/or a lens of the monitoring camera apparatus, so as to vary a rotary angle and an inclined angle of the sensing circuit board relative to the main circuit board. The spiral flexible board has a first end and a second end opposite to each other. The first end and the second end are respectively connected to the main circuit board and the sensing circuit board, so that image information acquired by the image sensor can be transmitted to the image processor via the spiral flexible board.