Bilateral Drive Image Stabilization for Compact Camera Modules
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Solution Overview
Problem
Conventional image stabilization apparatuses for image pickup devices face challenges in effectively correcting image blur caused by camera shake, particularly in maintaining a compact size and preventing interference between moving components and the lens drive shaft, which affects the stability and miniaturization of the device.
Innovation Solution
A sensor shift type image stabilization apparatus is designed with a moving member and a stationary member, where the drive means are arranged on opposite surfaces of the moving member, allowing for movement within a plane orthogonal to the optical axis, and the lens drive shaft is retracted to prevent interference, enabling miniaturization and stable image stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If drive means are arranged on one side of the moving member, then the structure is simpler, but the device size increases in the optical axis direction
Solution Approach 1:
The drive means are arranged on both the front surface and rear surface of the moving member, utilizing the third dimension (depth/optical axis direction) to distribute components. This bilateral arrangement reduces the overall device size in the optical axis direction while maintaining functional simplicity through symmetric configuration.
2Reliability
If the lens drive shaft is extended, then lens driving function is improved, but it interferes with the moving member
Solution Approach 1:
The lens drive shaft is extracted or separated from the image stabilization mechanism. By providing a dedicated lens drive shaft that operates independently from the moving member's stabilization movement, the patent eliminates interference between lens focusing/zooming operations and image stabilization operations, ensuring both functions operate reliably without mutual obstruction.
3Reliability
If the moving member space is increased, then image stabilization performance is improved, but the overall device size increases
Solution Approach 1:
The moving member is designed to move in the plane orthogonal to the optical axis (X-Y plane) rather than along the optical axis (Z direction). This planar movement configuration provides sufficient space for effective image stabilization while keeping the device compact in the optical axis direction, achieving good stabilization performance without increasing overall device volume.
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 corrects image blur, allows for a compact design by securing enough space for the moving components, and prevents enlargement in the optical axis direction, contributing to a more stable and reduced-sized image stabilization apparatus.
Implementation Method 1
a plurality of drive means configured to drive the moving member so as to move within a plane orthogonal to the optical axis of the image pickup optical system with respect to the stationary member, in which first drive means of the plurality of drive means is arranged on a first surface side of the moving member and second drive means of the plurality of drive means is arranged on a second surface side of the moving member
Data Source
AI summary
An image stabilization apparatus includes a moving member configured to be movable within a plane orthogonal to an optical axis of an image pickup optical system, a stationary member configured to movably support the moving member within the plane orthogonal to the optical axis of the image pickup optical system, and a plurality of drive units configured to drive the moving member so as to move within the plane orthogonal to the optical axis of the image pickup optical system with respect to the stationary member, in which a first drive unit of the plurality of drive units is arranged on a first surface side of the moving member and a second drive unit of the plurality of drive units is arranged on a second surface side of the moving member.