Optical Module Asymmetric Magnetic Driving Mechanism
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Solution Overview
Problem
The challenge is to reduce the size of driving mechanisms in electronic devices while increasing their durability to accommodate the trend towards smaller and more robust mobile devices that require auto focus and optical image stabilization.
Innovation Solution
An optical module with a movable portion and a driving assembly, utilizing a first and second magnetic element aligned along the optical axis, where the magnetic pole directions are perpendicular, and the size of the first magnetic element is smaller than the second, along with a driving coil and damping elements, to efficiently drive optical elements for auto focus and image stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional driving mechanism is used to achieve auto focus and optical image stabilization, then the driving function is reliable, but the size of the device becomes large
Solution Approach 1:
The driving mechanism is segmented into multiple magnetic elements (first magnetic element and second magnetic element) with different sizes along the optical axis, allowing each segment to perform specific functions while reducing the overall volume of the driving mechanism
Solution Approach 2:
The magnetic elements are arranged in different dimensions along the optical axis, with the first magnetic element positioned closer to the light incident side and the second magnetic element positioned farther away, enabling compact spatial arrangement that reduces overall mechanism size while maintaining driving reliability
2Length of moving object
If the size of electronic devices is reduced to meet user demands for thinner devices, then the device becomes more compact, but the durability of the driving mechanism decreases
Solution Approach 1:
The first magnetic element and second magnetic element are designed with asymmetric sizes along the optical axis, where the size of the first magnetic element is smaller than the size of the second magnetic element. This asymmetric design allows optimization of the driving mechanism for compact thickness while maintaining sufficient durability through the larger second magnetic element
Solution Approach 2:
Different regions of the driving mechanism are assigned different qualities and functions - the first magnetic element (smaller, closer to light incident side) and second magnetic element (larger, farther from light incident side) - allowing the mechanism to achieve both compact overall dimensions and localized durability where needed
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 configuration allows for compact and durable optical module designs that effectively achieve auto focus and optical image stabilization, enhancing the performance and miniaturization of electronic devices like smartphones and cameras.
Implementation Method 1
the driving assembly includes a first magnetic element and a second magnetic element, the first magnetic element and the second magnetic element are aligned along the optical axis
Data Source
AI summary
An optical module is provided, including a movable portion, a fixed portion and a driving assembly. The movable portion is used to hold an optical element having an optical axis. The movable portion is movably connected to the fixed portion. The driving assembly disposed in the fixed portion to drive the movable portion to move along the optical axis relative to the fixed portion. The driving assembly includes a first magnetic element and a second magnetic element. The first magnetic element and the second magnetic element are aligned along the optical axis. The size of the first magnetic element and the size of the second magnetic element along the optical axis are different.