Magnetic Optical Element Drive for Compact Aperture Stabilization
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Solution Overview
Problem
The challenge in modern electronic devices is to reduce the size of optical systems while enhancing their durability and functionality, particularly in image-capturing and video-recording devices, which often require auto focus and optical image stabilization.
Innovation Solution
An optical element driving mechanism is developed, comprising a movable portion connected to a fixed portion via a driving assembly, utilizing magnetic elements and coils to control the rotational angle of the movable portion, allowing continuous adjustment of blade openings for aperture or shutter control, and incorporating a support assembly to stabilize the movable portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the optical system size is reduced to meet modern device requirements, then the device becomes more compact and lightweight, but the durability and functionality of the optical system deteriorates
Solution Approach 1:
The patent implements a nested structure where the strengthen element is disposed within the bottom component of the optical system. The first and second magnetic elements are positioned on opposite sides of a virtual plane within the compact housing, and the driving coils are integrated into the circuit assembly layer. This nesting allows multiple functional components to occupy overlapping spatial volumes, reducing the overall optical system size while maintaining structural integrity and durability
Solution Approach 2:
The patent employs composite material structures, particularly the strengthen element made of metal disposed within the bottom, and the combination of magnetic elements with magnetic permeable materials. The circuit assembly integrates conductive elements, magnetic permeable elements, and insulating elements in a composite arrangement that provides both mechanical strength and electromagnetic functionality within a compact volume
2Volume of moving object
If the optical system size is reduced, then the device becomes more compact, but the structural complexity increases to maintain functionality
Solution Approach 1:
The bottom component serves multiple functions: it provides structural support, houses the strengthen element for durability, and integrates the driving assembly for optical element actuation. The circuit assembly simultaneously provides electrical connections, magnetic field generation through coils, and structural support. The movable portion functions as both a mechanical support for the optical element and a rotatable component for aperture/shutter control, reducing the need for separate dedicated components
3Measurement precision
If magnetic elements are used for driving the movable portion, then the driving precision and control accuracy are improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent optimizes magnetic element parameters by positioning the first and second magnetic elements on opposite sides of a virtual plane with specific spacing, and configuring the driving coils with appropriate turn counts and current characteristics. The magnetic permeable element parameters are adjusted to achieve the desired magnetic flux density. These parameter optimizations enable precise control of the movable portion while using commercially available magnetic materials and standard manufacturing processes
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 mechanism achieves miniaturization and improved durability by simplifying the structure and enhancing optical quality, enabling better image stabilization and depth detection accuracy.
Implementation Method 1
The driving assembly includes a first magnetic element and a second magnetic element... The driving assembly is used for driving the movable portion to move relative to the fixed portion
Implementation Method 2
The strengthen element includes magnetic permeable material... The magnetic permeable element is disposed on the first circuit element
Data Source
AI summary
An optical element driving mechanism is provided. The optical element driving mechanism includes a movable portion used for connecting an optical element, a fixed portion, and a driving assembly used for driving the movable portion to move relative to the fixed portion. The movable portion is movable relative to the fixed portion.