Angled Flexible Circuit Board for Low-Stress Sensor Movement
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Solution Overview
Problem
The stress on flexible circuit boards in electronic devices, such as camera devices with anti-shaking functions, hinders the effective movement of image sensor assemblies, impacting the device's performance.
Innovation Solution
A flexible circuit board design featuring a main board and two connecting plates with preset angles, allowing for enhanced movement by bending and support structures, which facilitates the rotation and movement of the image sensor assembly, thereby reducing stress and improving anti-shaking operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional flat flexible circuit board is used to connect the movable member and fixed member, then the electrical connection is simple and reliable, but the stress on the flexible circuit board hinders the movement of the movable member and affects anti-shaking operation
Solution Approach 1:
The flexible circuit board is divided into multiple plates (first plate, second plate, third plate, etc.) connected in sequence. This segmentation allows each plate to independently deform and accommodate movement, reducing the overall stress on the circuit board while maintaining electrical connection between the movable and fixed members.
Solution Approach 2:
The flexible circuit board is designed with preset bending angles and flexible connections that allow dynamic adjustment during movement. The board can flex and deform elastically when the movable member moves, adapting to the changing spatial relationship between components without generating excessive stress.
2Ease of operation
If the flexible circuit board is made more flexible to allow movement, then the movement effect is improved, but the structural stability and data transmission reliability may be compromised
Solution Approach 1:
By dividing the circuit board into multiple rigid plates connected by flexible joints, each plate maintains structural integrity for reliable signal transmission, while the joints provide the necessary flexibility for movement. This segmentation allows the system to simultaneously achieve both movement capability and transmission reliability.
Solution Approach 2:
The flexible circuit board employs a composite structure combining rigid circuit board materials with flexible connecting elements. This composite design enables the board to maintain dimensional stability and electrical performance while accommodating mechanical movement through the flexible portions.
3Stress or pressure
If a multi-plate structure with preset angles is used, then the stress is reduced and movement is facilitated, but the device complexity increases
Solution Approach 1:
The circuit board is segmented into multiple plates with preset bending angles, which distributes the mechanical stress across several joints rather than one location. While this increases structural complexity, it significantly reduces peak stress and improves movement capability.
Solution Approach 2:
The preset bending angles are pre-configured during manufacturing to anticipate and accommodate the expected movement ranges. This preliminary configuration reduces the need for complex real-time adjustments and simplifies the overall control mechanism, partially offsetting the increased structural complexity.
Data Source
AI summary
A flexible circuit board includes a main board, a first connecting plate, and a second connecting plate; a side surface of the first connecting plate is connected to a first side surface of the main board, and an included angle between the main board and the first connecting plate is a first preset angle; a side surface of the second connecting plate is connected to the first side surface of the main board, and an included angle between the main board and the second connecting plate is a second preset angle; and the first preset angle and the second preset angle are both greater than 0 degree and less than 180 degrees.