Camera Magnet Layout for Sensor-Shift Shake Correction
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Solution Overview
Problem
The increasing diameter and weight of lenses in camera devices due to high pixelation make it difficult to secure sufficient electromagnetic force for hand shake correction, particularly in limited spaces.
Innovation Solution
A camera device design that moves the image sensor in three axes (x-axis shift, y-axis shift, and z-axis rolling) using different-sized magnets and coils, with the first magnet being separate from the second magnet and having a thinner thickness in the optical axis direction, allowing for integrated hand shake correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lens diameter is increased to achieve high pixelation, then the image quality is improved, but the weight of the lens increases and it becomes difficult to secure sufficient electromagnetic force for hand shake correction in limited space
Solution Approach 1:
Instead of moving the heavy lens for hand shake correction, the patent inverts the approach by moving the image sensor while keeping the lens stationary. This reduces the electromagnetic force requirements and allows sufficient correction capability even in limited spaces with heavier lenses.
Solution Approach 2:
The patent implements hand shake correction by moving the image sensor in three-dimensional space (x-axis, y-axis, and z-axis rolling), adding dimensional freedom to the correction mechanism. This enables effective correction without requiring large lateral movement space that would be needed if moving the lens.
2Measurement precision
If the lens diameter is increased to achieve high pixelation, then the image quality is improved, but the available space for electromagnetic components is reduced
Solution Approach 1:
The patent reverses the traditional hand shake correction approach by moving the image sensor instead of the lens. This inversion allows the electromagnetic components to be positioned around the image sensor rather than the lens, optimizing space utilization in the limited area available.
Solution Approach 2:
The patent merges the hand shake correction function with the image sensor assembly, integrating the electromagnetic components (first and second magnets, first and second coils) directly with the image sensor. This consolidation reduces the overall space required compared to separate lens-based correction systems.
3Adaptability or versatility
If separate support parts are used for AF and OIS magnets, then the functionality is maintained, but the height and material costs increase
Solution Approach 1:
The patent merges the support structure for the first magnet (AF) and second magnet (OIS) into a single integrated support part. This consolidation reduces the overall height of the camera device while maintaining both autofocus and optical image stabilization functionalities through the different-sized magnet and coil arrangement.
Solution Approach 2:
The integrated support part serves multiple functions: supporting the first magnet for autofocus, supporting the second magnet for optical image stabilization, and providing structural framework for both coil assemblies. This multi-functionality reduces the need for separate dedicated support structures.
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 design enables effective hand shake correction while reducing the height and material costs of the camera device by integrating support parts for AF and OIS magnets, thus minimizing the shoulder height and reducing material expenses.
Implementation Method 1
a first coil being disposed in the first moving part at a position corresponding to the first magnet; and a second coil being disposed in the second moving part at a position corresponding to the second magnet
Data Source
AI summary
The present embodiment relates to a camera device comprising: a fixed part; a first moving part disposed inside the fixed part and including a lens; a second moving part disposed below the first moving part and including an image sensor; a first magnet and a second magnet disposed in the fixed part; a first coil positioned in the first moving part so as to correspond to the first magnet; and a second coil positioned in the second moving part so as to correspond to the second magnet, wherein the first magnet and the second magnet are of different sizes, and at least a portion of the first magnet overlaps the second magnet in a direction parallel to the outer surface of a first side wall of the fixed part.