Camera Module RFPCB Alignment to Reduce Stabilization Interference
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Solution Overview
Problem
The deformation and interference of the circuit board during image stabilization in camera modules affect the image stabilization performance due to reactive forces, compromising the optical image stabilization.
Innovation Solution
A camera module with a rigid flexible printed circuit board (RFPCB) that includes a rigid and flexible board part, allowing the flexible part to be bent and deformed for positioning, and an image stabilization assembly with a movable part that rotates relative to a fastening part, minimizing reactive forces by aligning the rotation centers to reduce deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid printed circuit board is used to support the lens assembly, then structural stability is improved, but the board deforms and tilts during image stabilization rotation, generating reactive forces that interfere with the rotation action
Solution Approach 1:
The patent changes the physical parameters of the circuit board by using a rigid flexible printed circuit board (RFPCB) instead of a completely rigid PCB. The RFPCB has specific flexibility parameters that allow it to deform in a controlled manner during rotation, reducing reactive forces while maintaining sufficient structural stability to support the lens assembly and image sensor.
Solution Approach 2:
The patent employs a composite structure combining rigid and flexible characteristics in the circuit board. The RFPCB integrates rigid support regions for mounting components with flexible regions that can accommodate rotational movement, creating a composite material solution that balances structural stability with rotation compatibility.
2Strength
If the circuit board is fastened to another component inside the electronic device, then mechanical support is improved, but the circuit board deforms and tilts during rotation, affecting image stabilization performance
Solution Approach 1:
The patent modifies the mechanical parameters of the circuit board connection system by using an RFPCB with optimized flexibility. This allows the board to maintain strong mechanical support through controlled deformation rather than rigid fastening, preventing tilting during rotation and ensuring reliable image stabilization performance.
Solution Approach 2:
The patent transitions from a static, rigid circuit board connection to a dynamic system where the RFPCB can adapt its shape during rotation. The flexible board dynamically adjusts its configuration during image stabilization operation, maintaining mechanical support while accommodating rotational movement to preserve stabilization reliability.
3Adaptability or versatility
If a flexible printed circuit board is used to allow bending and deformation, then ease of arrangement for other components is improved, but the board may generate larger reactive forces during rotation
Solution Approach 1:
The patent optimizes the flexibility parameters of the circuit board by using an RFPCB with controlled flexural properties. Unlike completely flexible FPCBs, the RFPCB has engineered stiffness that allows bending and deformation for component arrangement while limiting excessive deformation during rotation, thereby reducing reactive force generation.
Solution Approach 2:
The patent applies different structural qualities to different regions of the circuit board. The RFPCB has locally optimized properties where certain areas provide rigid support for components while other areas have controlled flexibility for arrangement adaptability, preventing uniform flexibility that would generate excessive reactive forces during rotation.
Data Source
AI summary
A camera module and an electronic device are provided. The camera module includes a lens assembly and an image stabilization assembly. The lens assembly includes a rigid flexible printed circuit board and a lens. The rigid flexible printed circuit board includes a rigid board part and a flexible board part led out from the rigid board part. The image stabilization assembly includes a movable part, a fastening part, and a connecting component. The movable part is fastened to the lens assembly, the fastening part is connected to the movable part by using the connecting component, and the movable part is configured to rotate relative to the fastening part by using the connecting component. A coordinate of a rotation center of the movable part in a Z-axis direction is close to or equal to a coordinate of the rigid board part in an optical axis of the lens.