Lens Barrel Multi-Direction Image Stabilization
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Solution Overview
Problem
Existing imaging apparatuses face challenges in achieving enhanced image stabilization in directions other than left-right and up-down, leading to camera shake, which affects image quality.
Innovation Solution
A lens barrel design incorporating a lens unit with first and second magnets and coils for orthogonal magnetic circuits, allowing integral operation of the lens unit in multiple directions without changing the positional relationship between magnets, ensuring smooth operation and improved stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a movable body is configured to operate in two different directions (pitching and yawing) for image stabilization, then image quality enhancement is achieved, but camera shake in other directions (including rolling direction) is not sufficiently corrected
Solution Approach 1:
The magnetic circuit system is segmented into two independent subsystems: a first magnetic circuit (first magnet and first coil) for moving the lens unit in first and second directions, and a second magnetic circuit (second magnet and second coil) for rotating the lens unit in the rolling direction. This segmentation allows each subsystem to independently address specific stabilization directions without interfering with the other, thereby achieving comprehensive multi-directional stabilization.
Solution Approach 2:
The invention extends the stabilization capability from two-dimensional (pitching and yawing) to three-dimensional by adding the rolling direction control. The second magnet and second coil are positioned to create a magnetic circuit that acts in the rolling direction, which is orthogonal to the plane of the first magnetic circuit, thereby adding another dimension of stabilization control.
2Reliability
If separate mounting structures are used for first magnet and second magnet, then each magnet can be optimally positioned, but device complexity increases
Solution Approach 1:
The first magnet and second magnet are integrated into a single mounting body structure. The mounting body includes a first magnet mounting portion and a second magnet mounting portion that are positioned orthogonally to each other, allowing both magnets to be optimally positioned for their respective functions while using a unified mounting structure, thereby reducing device complexity.
3Reliability
If magnets are positioned to maximize stabilization effect, then image stabilization performance improves, but the movable body operation becomes restricted
Solution Approach 1:
The magnetic circuit is segmented into two independent systems with separate magnets and coils. The first magnet and first coil handle lens unit movement in first and second directions, while the second magnet and second coil handle lens unit rotation in the rolling direction. This segmentation allows each component to operate independently without magnetic interference, ensuring both effective stabilization and smooth operation.
Solution Approach 2:
The mounting body acts as an intermediary structure that positions both the first magnet and second magnet in optimized locations while maintaining their functional independence. The orthogonal arrangement of magnet mounting portions on the mounting body allows each magnet to generate magnetic fields in different directions without interfering with the other's operation.
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 enhances image stabilization functionality across various directions without compromising the movable body's smooth operation, reducing camera shake and improving image quality.
Implementation Method 1
a first coil that forms a magnetic circuit together with the first magnet, and moves the lens unit in at least one of the first direction or the second direction
Implementation Method 2
a second coil that forms a magnetic circuit together with the second magnet, and rotates the lens unit in the rolling direction
Data Source
AI summary
Enhancement of the functionality of image stabilization is achieved while smooth operation of a movable body is ensured. A lens barrel includes a lens unit including at least one lens, a first magnet for performing image stabilization in at least one of a first direction or a second direction, a second magnet for performing image stabilization in a rolling direction, a first coil that forms a magnetic circuit together with the first magnet, and moves the lens unit in at least one of the first direction or the second direction, a second coil that forms a magnetic circuit together with the second magnet, and rotates the lens unit in the rolling direction, and a mounting body having the first magnet and the second magnet mounted thereon. When the lens unit is moved in at least one of the first direction or the second direction, the first magnet, the second magnet, and the mounting body are integrally operated.