Optical Element Drive Layout for Multi-Lens Magnetic Isolation
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Solution Overview
Problem
Magnetic interference between dual-lens camera system driving mechanisms affects focus speed and accuracy, as the lenses are often arranged closely together, leading to adverse effects on camera performance.
Innovation Solution
A driving mechanism with a fixed module and a movable module, utilizing a magnet and coil configuration where the magnet's central axis is offset from the coil's center, and additional magnetically conductive elements are used to reduce magnetic interference, allowing for efficient movement of optical elements without overlap in the direction parallel to the axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual-lens camera system has two lens driving mechanisms arranged close to each other, then the camera system can achieve multi-lens functionality, but magnetic interference between the magnets of the two lens driving mechanisms occurs, causing focus speed and accuracy to deteriorate
Solution Approach 1:
The patent applies asymmetry by offsetting the central axis of the magnet from the center of the coil in the driving mechanism. This asymmetric configuration changes the magnetic field distribution pattern, causing magnetic field lines to extend in different directions that do not overlap with adjacent driving mechanisms, thereby reducing magnetic interference while maintaining multi-lens functionality
Solution Approach 2:
The patent introduces a magnetically conductive element as an intermediary between the magnet and the external environment. This element concentrates and guides the magnetic field lines, confining them within a controlled region and preventing them from extending outward to interfere with adjacent driving mechanisms, thus protecting focus speed and accuracy
2Object-affected harmful factors
If magnet central axis is offset from coil center, then magnetic field lines extend through part of the coil reducing interference, but the driving mechanism structure becomes more complex
Solution Approach 1:
The patent implements asymmetry by deliberately offsetting the magnet's central axis from the coil's center. This asymmetric arrangement causes the magnetic field to distribute unevenly, with field lines extending through only part of the coil rather than symmetrically through the entire coil, thereby reducing magnetic interference with adjacent mechanisms
Solution Approach 2:
The patent changes the spatial parameter of the magnet-coil configuration by introducing an offset distance between the magnet central axis and coil center. This parameter change fundamentally alters the magnetic field distribution pattern, reducing field overlap and interference while maintaining functional performance
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 solution effectively prevents magnetic interference between driving mechanisms, enhancing the focus speed and accuracy of lenses in multi-lens camera systems by ensuring the magnets are offset from the coil centers and using conductive elements to concentrate magnetic fields, thus improving system stability and performance.
Implementation Method 1
the drive assembly is disposed on the fixed module and the movable module, having a magnet and a coil for moving the movable module relative to the fixed module
Implementation Method 2
using conductive elements to concentrate magnetic fields, thus improving system stability and performance
Data Source
AI summary
An optical element driving mechanism is provided. The optical element driving mechanism includes a frame, a holder, and a driving assembly. The holder is connected to an optical element with an optical axis. The holder is movable relative to the frame. The driving assembly drives the holder to move relative to the frame. The drive assembly includes a first coil, a first magnetic element, and a second magnetic element. The first magnetic element corresponds to the first coil. The second magnetic element is not in direct contact with the first magnetic element. The first magnetic element has a first surface facing the first coil and a second surface facing the second magnetic element. The first surface is not parallel with the second surface.