Optical Element Driving Mechanism Miniaturization
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Solution Overview
Problem
Modern electronic devices with image-capturing and video-recording functions face challenges in reducing the size of optical element driving mechanisms while maintaining durability and achieving effective auto focus and optical image stabilization.
Innovation Solution
The optical element driving mechanism incorporates a movable portion connected to a fixed portion through a support assembly, including a coil and magnetic elements, with resilient elements and stopping structures to define the movable range, and a frame with lightening structures to reduce weight and size, allowing for miniaturization while maintaining mechanical strength and optical quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the driving mechanism size is reduced to meet modern device requirements, then the device becomes smaller and more portable, but the mechanical strength and durability may be compromised
Solution Approach 1:
The patent employs composite material structures in the driving mechanism components, combining materials with different properties to achieve both miniaturization and enhanced mechanical strength. The composite structure allows the smaller components to maintain sufficient durability and load-bearing capacity despite reduced size.
Solution Approach 2:
The driving mechanism is divided into segmented modular components that can be optimized independently. This segmentation allows each part to be sized efficiently for its specific function while maintaining overall mechanical integrity, resolving the contradiction between compact size and structural strength.
2Volume of moving object
If the resilient element size is reduced for miniaturization, then the driving mechanism becomes more compact, but the support and cushioning capability may be weakened
Solution Approach 1:
The patent applies parameter changes to the resilient element by modifying its material composition, elasticity coefficients, and geometric parameters. These changes enable the smaller resilient element to maintain adequate support and cushioning capabilities despite the size reduction, balancing miniaturization with functional reliability.
3Measurement precision
If the movable portion is designed with larger stopping structures to improve focus precision, then the positioning accuracy improves, but the overall mechanism size increases
Solution Approach 1:
The patent applies local quality by concentrating the stopping structures only at the critical positioning points where precision is needed, rather than uniformly across the entire movable portion. This localized approach achieves accurate focus positioning while minimizing the overall size of the driving mechanism.
Solution Approach 2:
The stopping structures are designed with multi-dimensional features that provide precise positioning in the optical axis direction without increasing size in lateral dimensions. By utilizing dimensional optimization, the patent achieves high focus precision within a compact form factor.
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
This design achieves miniaturization of the driving mechanism, enhances durability, and improves image stabilization and focus accuracy, enabling smaller, more robust devices with better optical performance.
Implementation Method 1
The driving assembly includes a coil and a magnetic element
Implementation Method 2
The support assembly includes a resilient element, the movable portion is movably connected to the fixed portion through the resilient element
Data Source
AI summary
An optical element driving mechanism is provided. The optical element driving mechanism includes a movable portion, a fixed portion, a driving assembly, and a support assembly. The movable portion is used for connecting to an optical element. The movable portion may move relative to the fixed portion. The driving assembly is used for driving the movable portion to move relative to the fixed portion. The movable portion is movable relative to the fixed portion through the support assembly.