Optical Element Driving Mechanism for Compact AF and OIS
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Solution Overview
Problem
Existing camera module driving mechanisms fail to meet the demands of miniaturization and functionality, particularly in achieving auto focusing and optical image stabilization while being compact enough for integration into electronic devices.
Innovation Solution
An optical element driving mechanism with a fixed assembly, first and second movable assemblies, and corresponding driving assemblies, utilizing coils, permeability elements, magnetic elements, and magnetic-enhancing elements to enable independent and cooperative movement of optical elements for optical zoom, stabilized by a guiding assembly and magnetic-adjusting element to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing driving mechanisms are used to achieve auto focusing and optical image stabilization, then the functionality is satisfied, but the device size cannot be minimized
Solution Approach 1:
The patent combines multiple driving mechanisms into a shared structure where a common housing supports multiple coil assemblies. The first and second movable assemblies share the same housing structure and magnetic field generation system, integrating what would traditionally be separate autofocus and OIS mechanisms into a unified compact unit.
Solution Approach 2:
The common housing serves multiple functions: it supports both the first and second coil assemblies, provides structural framework for both movable assemblies, and acts as part of the magnetic circuit for both driving mechanisms. This multi-functional design reduces overall component count and device volume.
2Volume of moving object
If the camera module is miniaturized to fit electronic devices, then the volume is reduced, but the driving mechanism cannot maintain stable and precise movement of optical elements
Solution Approach 1:
The patent arranges the first and second movable assemblies in a stacked configuration along the vertical direction, with coils positioned at different heights. This three-dimensional layout allows compact integration while maintaining adequate spacing for magnetic field generation and optical element movement, preserving precision in a reduced footprint.
Solution Approach 2:
The first movable assembly is positioned within the vertical space defined by the common housing, with the second movable assembly nested below it. The coils and magnetic elements are arranged in nested layers, maximizing space utilization while maintaining functional independence and movement precision of each optical element.
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 mechanism achieves miniaturization and stable, precise movement of optical elements, enabling auto focusing and optical image stabilization, while maintaining a compact form factor suitable for electronic devices.
Implementation Method 1
a first coil; a first permeability element, corresponding to the first coil; a first magnetic element, corresponding to the first coil and configured to generate a first driving force
Implementation Method 2
a first magnetic element, corresponding to the first coil and configured to generate a first driving force
Data Source
AI summary
An optical element driving mechanism is provided and includes a fixed assembly, a first movable assembly and a first driving assembly. The first movable assembly is configured to connect a first optical element, and the first movable assembly is movable relative to the fixed assembly. The first driving assembly is configured to drive the first movable assembly to move relative to the fixed assembly in a first dimension.