Image Stabilization Magnet Positioning to Reduce Interference
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Solution Overview
Problem
Conventional image stabilization apparatuses face reduced correcting accuracy due to magnetic interference among corrective lens units, which occurs when the distances between these units are small, leading to degraded optical performance.
Innovation Solution
The apparatus includes a first and second optical element driven by electromagnetic action using magnets and coils, with the magnets positioned to minimize magnetic interference by being outside each other's projected areas, allowing for independent movement and reduced magnetic influence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the distances among corrective lens units are reduced, then the device size is minimized, but magnetic interference occurs leading to reduced correcting accuracy
Solution Approach 1:
The patent positions magnets in different spatial dimensions relative to each other. Specifically, the first magnet is placed outside the projected area of the second magnet when projected along the second magnet's magnetized direction, and vice versa. This three-dimensional spatial arrangement allows the corrective lens units to be positioned closer together while maintaining sufficient magnetic field separation, thus reducing magnetic interference without increasing device volume.
Solution Approach 2:
The patent optimizes the local magnetic field environment around each magnet by carefully controlling the spatial relationship between magnets. By ensuring each magnet lies outside the projected area of others along their respective magnetized directions, the local magnetic quality is maintained, preventing interference while allowing compact overall device design.
2Adaptability or versatility
If multiple corrective lens units are used for large image blur correction, then the correcting capability is improved, but magnetic interference among units increases
Solution Approach 1:
The patent enables multiple corrective lens units to coexist in a compact arrangement by utilizing three-dimensional spatial positioning. Each magnet is positioned outside the projected areas of other magnets along their magnetized directions, creating independent magnetic field zones. This allows multiple units to work together for comprehensive image stabilization while minimizing mutual magnetic interference.
Solution Approach 2:
The patent effectively segments the magnetic fields of different corrective lens units by positioning them in spatially separated zones. Each magnet operates in its own designated spatial region, preventing magnetic field overlap and interference. This segmentation allows multiple corrective units to function independently and simultaneously, enhancing overall correcting capability without magnetic interference.
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 effectively reduces magnetic interference, maintaining high correcting accuracy and optical performance even at shorter distances between corrective lens units.
Implementation Method 1
a first driver including a first magnet magnetized in a first magnetized direction and a first coil and configured to drive the first optical element by an electromagnetic action, a second optical element configured to move in a direction different from the optical axis, and a second driver including a second magnet magnetized in a second magnetized direction and a second coil and configured to drive the second optical element by an electromagnetic action
Data Source
AI summary
An image stabilization apparatus includes a first optical element configured to move in a direction different from an optical axis, a first driver including a first magnet magnetized in a first magnetized direction and a first coil and configured to drive the first optical element by an electromagnetic action, a second optical element configured to move in a direction different from the optical axis, and a second driver including a second magnet magnetized in a second magnetized direction and a second coil and configured to drive the second optical element by an electromagnetic action. The first magnet is disposed outside a second area onto which the second magnet is projected in the second magnetized direction and the second magnet is disposed outside a first area onto which the first magnet is projected in the first magnetized direction.