Optical Element Driving Mechanism for Miniature AF and OIS Modules
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Solution Overview
Problem
Existing camera module driving mechanisms struggle to achieve miniaturization while maintaining autofocus and optical image stabilization functions.
Innovation Solution
An optical element driving mechanism with a fixed assembly, movable assembly, driving assembly, and stopping assembly, featuring a miniaturized lens holder design that includes a driving coil with specific magnetic element configurations and adhesive structures to facilitate movement and stabilization, allowing for a larger lens to be held with high driving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the camera module is miniaturized, then the size of electronic devices is reduced, but the driving mechanism cannot meet all user needs for autofocus and optical image stabilization
Solution Approach 1:
The patent combines autofocus and optical image stabilization driving mechanisms into a single integrated driving assembly. The driving assembly includes a first driving coil for autofocus and a second driving coil for optical image stabilization, both integrated within the same lens holder structure, allowing the miniaturized camera module to maintain both functions simultaneously
Solution Approach 2:
The lens holder is designed as a multi-functional component that serves both autofocus movement and optical image stabilization. The driving mechanism can perform multiple operations (focus adjustment and stabilization) using a unified structural platform, enabling the miniaturized module to deliver comprehensive functionality
2Volume of moving object
If the lens holder size is reduced, then miniaturization is achieved, but the lens size is limited
Solution Approach 1:
The patent optimizes the lens holder structure by utilizing three-dimensional space efficiently. The lens holder includes a receiving space configured to accommodate the lens, with optimized wall thickness and internal positioning structures that maximize the lens accommodation capacity within a compact external footprint, allowing larger lenses to fit in smaller holders
3Volume of moving object
If the driving mechanism is miniaturized, then the camera module size is reduced, but the driving efficiency decreases
Solution Approach 1:
The patent employs localized high-strength materials and optimized magnetic field distributions in critical areas of the driving mechanism. The driving coils are positioned and dimensioned to create concentrated electromagnetic forces where needed, ensuring efficient driving performance despite the overall miniaturization of the mechanism
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves miniaturization of the camera module while maintaining autofocus and optical image stabilization capabilities, with increased adhesive strength and reduced risk of collision during movement.
Implementation Method 1
The driving assembly includes a driving coil, and a winding axis of the driving coil is parallel to the main axis
Data Source
AI summary
An optical element driving mechanism is provided and includes a fixed assembly, a movable assembly, a driving assembly and a stopping assembly. The fixed assembly has a main axis. The movable assembly is configured to connect an optical element, and the movable assembly is movable relative to the fixed assembly. The driving assembly is configured to drive the movable assembly to move relative to the fixed assembly. The stopping assembly is configured to limit the movement of the movable assembly relative to the fixed assembly within a range of motion.