Multi-Lens Camera Drive Layout for Magnetic Interference Control
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Solution Overview
Problem
Magnetic interference between lens driving mechanisms in dual-lens camera systems affects focus speed and accuracy, necessitating a solution to prevent such interference.
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 along multiple axes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If lens driving mechanisms are arranged close to each other in dual-lens camera systems, then device compactness is improved, but magnetic interference between magnets 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 positions the magnet such that its central axis extends through a part of the coil but not the center, creating an uneven spatial relationship that reduces magnetic field overlap between adjacent lens driving mechanisms while maintaining compact device volume
Solution Approach 2:
The patent utilizes dimensional arrangement by configuring the magnet's central axis to be perpendicular to the first axis (optical axis) and offset from the coil center. This three-dimensional positioning strategy allows the magnet and coil to be arranged in a manner that minimizes magnetic interference in the horizontal direction while maintaining effective driving force along the optical axis
2Speed
If magnet and coil are positioned to enable efficient optical element movement, then focus speed is improved, but magnetic interference with adjacent mechanisms increases
Solution Approach 1:
The patent applies local quality by positioning the magnet such that its central axis is offset from the coil center and extends through only a part of the coil. This creates a localized magnetic field distribution that concentrates the driving force where needed while reducing magnetic field extension into adjacent spaces, thereby minimizing interference with neighboring lens driving mechanisms
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 lens driving mechanisms, enhancing focus speed and accuracy by ensuring the magnets do not overlap in a direction parallel to the axis of movement, thus improving the performance of multi-lens camera systems.
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 along a first axis
Data Source
AI summary
A driving mechanism for driving an optical element is provided, including a fixed module, a movable module, and a drive assembly disposed on the fixed module and the movable module. The drive assembly includes a magnet and a coil for moving the movable module relative to the fixed module along a first axis. Specifically, the central axis of the magnet extends through a part of the coil and is offset from the center of the coil, wherein the central axis is perpendicular to the first axis.