Camera Module OIS Sliding Frame Structure for Motion Decoupling
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Solution Overview
Problem
Conventional camera modules with optical image stabilization mechanisms suffer from poor support reliability due to the use of suspension wires or ball bearings, which lead to reduced image stabilization performance, especially in moving states.
Innovation Solution
A camera module with a double-layer degree-of-freedom decoupling mechanism, featuring first and second movable frames and a fixed frame, where sliding grooves and parts allow for independent motion in two directions, enhancing support reliability and stability through a fitting manner with positioning grooves and lubrication, and utilizing integrated injection-molded structures and magnets for improved motion accuracy and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wire suspension stabilization or ball bearing stabilization is used, then the camera module can achieve image stabilization, but the support reliability is poor and prone to reduction in image stabilization performance
Solution Approach 1:
The image stabilization mechanism is divided into multiple movable frames (first movable frame, second movable frame) and fixed frames, with each frame responsible for specific stabilization functions. This segmentation allows each component to have specialized support structures, improving overall reliability while maintaining manageable complexity through modular design
Solution Approach 2:
The patent introduces a driving assembly as an intermediary component that connects the movable frames to the fixed frames through driving components. This intermediary mechanism provides reliable drive forces while distributing mechanical stress, preventing direct load paths that would compromise the suspension wires or ball bearings in conventional designs
2Measurement precision
If conventional suspension wire or ball bearing stabilization is used, then the camera module can maintain basic stabilization, but motion accuracy is reduced and image stabilization effect is poor in moving states
Solution Approach 1:
The patent employs dynamic support structures where the movable frames can adjust their positions and orientations relative to the fixed frames during operation. The driving assembly provides dynamic control forces that adapt to varying motion conditions, maintaining high motion accuracy and stabilization performance in moving states rather than relying on static suspension components
Solution Approach 2:
The patent transitions from single-point or single-line support (conventional wire/ball bearing) to multi-point spatial distribution through the movable frame and fixed frame arrangement. This dimensional expansion of the support system improves motion accuracy by distributing constraints across multiple degrees of freedom, preventing the tilting and inaccuracies that occur in conventional single-point stabilization
3Adaptability or versatility
If the first movable frame and second movable frame are coupled through sliding grooves and parts, then double-layer degree-of-freedom decoupling is achieved, but the structure becomes more complex
Solution Approach 1:
The sliding groove mechanism is segmented into first sliding grooves and second sliding grooves, with each groove type handling specific directional motions. This segmentation enables independent control of motion in different directions (first direction and second direction), achieving degree-of-freedom decoupling while keeping each individual groove structure simple and manufacturable
Solution Approach 2:
Instead of using complex active control mechanisms to achieve motion decoupling, the patent inverts the approach by using passive geometric constraints through the sliding groove configurations. The groove shapes and orientations naturally guide and separate motions in different directions, achieving adaptability through geometric design rather than active control complexity
Data Source
AI summary
A camera device is provided, including an image stabilization mechanism. Along a thickness direction, the image stabilization mechanism includes a first movable frame, a second movable frame, and a third fixed frame that are sequentially coupled. The first movable frame is configured to mount a lens assembly, one of the first movable frame and the second movable frame is provided with a first sliding groove part, the other one is provided with a first sliding part which is capable of sliding along the first sliding groove part, and the first sliding groove part extends along a first direction. One of the second movable frame and the third fixed frame is provided with a second sliding groove part, the other one is provided with a second sliding part which is capable of sliding along the second sliding groove part, and the second sliding groove part extends along a second direction.