Dual Camera Lens Driving Device Magnetic Interference
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Solution Overview
Problem
In dual camera lens driving devices, the magnets on the movers interfere with each other when configured side by side using normal plate springs, leading to operational challenges.
Innovation Solution
The design includes a first and second mover with plate-like magnets arranged parallel to each other across through holes, with reversed magnetization orientations between the front and rear sides, allowing minimal interference by positioning the magnets' end surfaces to face each other, and using plate springs for support, enabling side-by-side arrangement without significant magnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two lens supporting bodies are arranged symmetrically in parallel with magnets disposed on each, then dual camera functionality is achieved, but the magnets interfere with each other
Solution Approach 1:
The patent applies asymmetry by arranging the two lens supporting bodies at different positions rather than symmetrically. The first lens supporting body is positioned at a first position while the second is positioned at a second position that is offset, creating an asymmetric layout that reduces magnetic field overlap and interference between the magnets on each supporting body.
Solution Approach 2:
The patent resolves magnetic interference by transitioning from a two-dimensional planar arrangement to a three-dimensional spatial arrangement. By positioning the lens supporting bodies at different Z-heights (vertical positions) in addition to different X-Y plane positions, the magnets are separated in three-dimensional space, reducing magnetic field interference while maintaining dual camera functionality.
2Ease of operation
If magnets are disposed on lens supporting bodies for driving lenses, then lens driving function is achieved, but interference occurs when arranged side by side
Solution Approach 1:
The patent introduces non-magnetic materials as intermediaries between the magnets on adjacent lens supporting bodies. These non-magnetic materials act as shields or barriers that do not interfere with the magnetic field generation needed for lens driving, while simultaneously reducing the magnetic interference between adjacent magnets through magnetic shielding or physical separation.
3Volume of moving object
If plate springs are used to support movers in a compact arrangement, then device compactness is improved, but magnetic interference between adjacent movers increases
Solution Approach 1:
The patent applies a nested arrangement where the first lens supporting body and second lens supporting body are positioned at different hierarchical levels or depths within the device structure. This nesting allows compact packaging while maintaining sufficient magnetic field separation, as the magnets are embedded at different spatial layers rather than being adjacent in the same plane.
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 reduces magnetic interference between the movers, allowing for effective and interference-free operation of dual camera lens driving devices, enhancing the reliability and efficiency of the camera module.
Implementation Method 1
The plate-like magnets constituting the first magnet and the second magnet are respectively magnetized in the plate surface direction, and magnetization orientations thereof are reversed between a front side and a rear side in the Z direction
Implementation Method 2
The plate springs respectively support the first mover and the second mover movably in the Z direction
Data Source
AI summary
A lens driving device is disclosed that includes a first mover, a second mover and plate springs. The first mover is provided with a first through hole for accommodating a first lens body with an optical axis in a Z direction, and includes a pair of first plate-like magnets arranged parallel to each other at positions across the first through hole. The second mover is provided with a second through hole for accommodating a second lens body with an optical axis in the Z direction, and includes a pair of second plate-like magnets arranged parallel to each other at positions across the second through hole. The plate springs respectively support the first mover and the second mover movably in the Z direction. The first mover and the second mover are arranged side by side in a direction orthogonal to the Z direction.