Optical Element Driving Assembly for Compact Autofocus Stabilization
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Solution Overview
Problem
The challenge in modern electronic devices is to reduce the size of optical systems while maintaining durability and improving auto focus and optical image stabilization functions.
Innovation Solution
An optical element driving mechanism utilizing a driving assembly with a coil, magnetic elements, and a resilient assembly to move an optical element relative to a fixed portion, enhancing control and accuracy through magnetic field manipulation and resonance.
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 portable, but the durability and performance of auto focus and optical image stabilization functions deteriorate
Solution Approach 1:
The optical element is divided into multiple segments or layers, with driving assemblies positioned at different locations (e.g., first driving assembly for front surface, second driving assembly for back surface). This segmentation allows independent control of each segment, enabling compact design while maintaining overall system performance and durability through distributed actuation.
Solution Approach 2:
The patent employs a nested structure where magnetic elements and coils are integrated within the optical element housing. The first and second magnetic elements are positioned at different depths (front and back surfaces), with their respective coils nested around them. This nesting approach reduces the overall optical system volume while preserving the functionality of multiple driving assemblies, thereby maintaining durability and performance in a compact form factor.
2Device complexity
If a single driving assembly is used to control the optical element, then the device complexity is reduced, but the precision and control accuracy of auto focus and image stabilization deteriorate
Solution Approach 1:
The patent implements local quality by positioning driving assemblies at specific locations (front and back surfaces of the optical element) rather than using a single centralized assembly. Each driving assembly is optimized for its local position, with magnetic elements and coils configured to provide precise control at that specific location. This distributed local control approach enhances overall precision and control accuracy while managing device complexity through targeted placement rather than uniform complexity throughout.
Solution Approach 2:
The patent utilizes mechanical vibration principles in the resilient assembly, which includes elastic elements that can vibrate or deform to fine-tune the position of the optical element. The resilient assembly works in conjunction with the magnetic driving assemblies to provide both coarse positioning (through magnetic force) and fine adjustment (through elastic deformation), thereby improving control accuracy without significantly increasing device complexity.
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
Enables miniaturization and improved durability of optical systems with enhanced auto focus and image stabilization capabilities, allowing for functions like detection, scanning, and projection.
Implementation Method 1
a coil having a winding axis, a first magnetic element corresponding to the coil, and a first magnetic permeable element corresponding to the first magnetic element
Implementation Method 2
a resilient assembly includes a first fixed end affixed on the optical element, a second fixed end affixed on the fixed portion, an intermediate connecting portion between the first fixed end and the second fixed end
Data Source
AI summary
An optical element driving mechanism used for driving a first optical element is provided. The optical element driving mechanism includes a fixed portion and a first driving assembly. The first driving assembly is used for driving the first optical element to move relative to the fixed portion in a first dimension.