Optical System Magnetic Drive for Compact Autofocus and Stabilization
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Solution Overview
Problem
The challenge in modern electronic devices is to reduce the size of driving mechanisms for optical elements while enhancing their durability, particularly for auto focus and optical image stabilization, given the trend towards smaller and more durable designs.
Innovation Solution
An optical system comprising a first optical module, a fixed portion, and a driving module, where the first optical module is movable relative to the fixed portion, utilizing a magnetic conductive assembly and a coil to drive the module, with specific arrangements of magnetic conductive elements and positioning portions to minimize size and enhance durability.
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 size and weight are reduced, but the durability and reliability of the driving mechanism deteriorate
Solution Approach 1:
The patent replaces traditional mechanical driving mechanisms (motors, gears, linkages) with a magnetic driving mechanism consisting of a coil and magnetic conductive assembly. This electromagnetic system eliminates complex mechanical moving parts, achieving miniaturization while enhancing durability through non-contact actuation and reduced mechanical wear.
Solution Approach 2:
The patent optimizes the magnetic conductive assembly geometry (L-shaped configuration with specific arm lengths) and coil parameters to achieve precise focal adjustment within a minimized volume. By carefully controlling the magnetic field generation parameters, the system achieves reliable auto-focus functionality in a compact form factor.
2Adaptability or versatility
If more optical elements and driving mechanisms are added to achieve auto focus and optical image stabilization, then the functionality is improved, but the device complexity and size increase
Solution Approach 1:
The magnetic driving mechanism serves multiple functions: it provides both auto-focus adjustment by moving the lens assembly and optical image stabilization by counteracting vibrations. This single multi-functional system replaces what would traditionally require separate driving mechanisms for each function, reducing overall device complexity.
Solution Approach 2:
The patent integrates the auto-focus and optical image stabilization driving functions into a unified magnetic driving mechanism. The coil and magnetic conductive assembly work together to accomplish both focal adjustment and vibration compensation, merging previously separate systems into one compact unit.
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 system achieves miniaturization and increased durability by optimizing the arrangement of magnetic conductive elements and positioning portions, allowing for efficient auto focus and optical image stabilization, while ensuring consistent optical axis alignment.
Implementation Method 1
The driving module includes a bottom disposed on the substrate, a base disposed on the bottom, a coil affixed on the base, a magnetic conductive assembly corresponding to the coil and disposed on the base, and a magnetic element corresponding to the magnetic conductive assembly
Data Source
AI summary
An optical system is provided. The optical system includes a first optical module, a fixed portion, and a driving module. The first optical module is used for connecting to a first optical element. The first optical module is movable relative to the fixed portion. The driving module is used for driving the first optical module to move relative to the fixed portion. The fixed portion includes an opening corresponding to the first optical module.