Magnetic Optical Element Actuation for Compact Lens Stabilization
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Solution Overview
Problem
The challenge of reducing the size of optical systems in modern electronic devices while maintaining durability and enhancing optical performance, such as auto focus and image stabilization, has become crucial due to the trend towards smaller and more durable devices.
Innovation Solution
An optical element driving mechanism is designed with a fixed portion and a driving assembly that includes a coil, magnetic elements, and a support assembly, allowing the optical element to move relative to the fixed portion, utilizing magnetic fields to achieve precise movement and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional optical systems are used in modern electronic devices, then optical functions (auto focus, image stabilization) can be achieved, but the device size increases and durability decreases
Solution Approach 1:
The patent replaces traditional mechanical optical driving mechanisms with a magnetic field-based driving assembly. The driving assembly includes a coil and magnetic elements that generate magnetic fields to drive the optical element (lens) to move along the optical axis, eliminating complex mechanical structures and reducing overall system size while improving durability.
Solution Approach 2:
The patent arranges magnetic elements in specific spatial configurations (first magnetic element with N and S poles arranged in a first pole direction, second magnetic element positioned accordingly) to generate rotational motion through magnetic field interactions. This dimensional arrangement of magnetic components enables compact optical element positioning without increasing system volume.
2Volume of moving object
If optical element driving mechanism is miniaturized, then device size is reduced, but manufacturing precision and assembly difficulty increase
Solution Approach 1:
The driving assembly is segmented into distinct functional components: a coil for generating magnetic fields, a first magnetic element with specific pole arrangements, and a second magnetic element. This segmentation allows each component to be manufactured and positioned independently with precise tolerances, facilitating miniaturization while maintaining manufacturing precision.
Solution Approach 2:
The patent employs magnetic elements with specific local magnetic pole distributions (first magnetic element with N and S poles in a first pole direction) to create localized magnetic field zones. This local quality approach enables precise control of optical element position within a compact volume, achieving both miniaturization and positioning precision.
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 enables miniaturization and improved optical performance, including enhanced auto focus and image stabilization, while allowing for integration into smaller and more durable electronic devices.
Implementation Method 1
The driving assembly includes a coil, a first magnetic element corresponding to the coil, and a second magnetic element corresponding to the coil
Implementation Method 2
An N pole and a S pole of the first magnetic element are arranged in a first pole direction... The first magnetic element and the second magnetic element are arranged in the first pole direction
Data Source
AI summary
An optical element driving mechanism used for driving an optical element is provided. The optical element driving mechanism includes a fixed portion and a driving assembly. The driving assembly is used for driving the optical element to move relative to the fixed portion in a first dimension.