Dual-Lens Camera Module Magnet Arrangement for Interference Reduction
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Solution Overview
Problem
Current dual-lens camera modules experience magnetic interference between their driving modules, affecting focus speed and accuracy.
Innovation Solution
The optical system design includes a base with two lens driving modules, where only one magnet is placed between the lens holders, and the magnets and coils are arranged along specific directions to minimize magnetic interference, allowing for reduced base width and length, and enhanced production convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If two lens driving modules are placed close to each other in a dual-lens camera module, then the device size is reduced, but magnetic interference between the magnets of different lens driving modules is generated, affecting focus speed and accuracy
Solution Approach 1:
The patent removes one magnet from the configuration between the first and second lens holders, extracting the harmful magnetic element that causes interference between the two lens driving modules. This leaves only one magnet (the first magnet) in the space between the lens holders, eliminating the magnetic interference problem while maintaining the compact device size.
Solution Approach 2:
The patent creates an asymmetric magnetic element arrangement where the first magnet has a long strip-shaped structure extending along a first direction, while the second magnet extends along a second direction perpendicular to the first direction. This asymmetric configuration optimizes the magnetic field distribution to reduce interference between the two lens driving modules.
2Measurement precision
If magnets are arranged to minimize magnetic interference, then focus speed and accuracy are improved, but the base width and length increase
Solution Approach 1:
The patent applies local quality by making the first magnet have a long strip-shaped structure that extends along a specific direction, concentrating the magnetic field in a localized region between the lens holders. This allows the magnetic interference to be minimized in critical areas while keeping the overall base dimensions compact.
3Measurement precision
If magnets are arranged to minimize magnetic interference, then focus speed and accuracy are improved, but the base length increases
Solution Approach 1:
The patent uses asymmetric arrangement where the first magnet extends along a first direction and the second magnet extends along a second direction perpendicular to the first direction. This asymmetric configuration allows the magnets to be positioned efficiently in the available space, minimizing the base length while maintaining focus accuracy.
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 design effectively reduces magnetic interference, improving focus speed and accuracy while achieving miniaturization of the optical system.
Implementation Method 1
the first coil is configured to drive the first lens holder to move relative to the base
Implementation Method 2
the second coil is configured to drive the second lens holder to move relative to the base
Data Source
AI summary
An optical system includes a base, a first lens driving module, and a second lens driving module. The first lens driving module includes a first lens holder, a first magnet, and a first coil. The first lens holder is configured to hold a first optical element. The first coil corresponding to the first magnet is configured to drive the first lens holder to move relative to the base. The second lens driving module includes a second lens holder, a second magnet, and a second coil. The second lens holder is configured to hold a second optical element. The second coil corresponding to the second magnet is configured to drive the second lens holder to move relative to the base. The first magnet is disposed between the first and second lens holders, and no other magnet is disposed between the first and second lens holders except the first magnet.