Camera Module Coil Layout for Compact 2-Axis Stabilization
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Solution Overview
Problem
Camera modules with separate driving units for lens movement in different directions increase the module's size due to magnetic interference, leading to a larger form factor.
Innovation Solution
A miniaturized camera module design with a first and second driving unit configured on a single surface, utilizing a single magnet for a 2-axis image stabilization function, reducing the area occupied by coils and magnets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If separate driving units are disposed on different surfaces to limit magnetic interference, then magnetic interference between driving units is reduced, but the size of the camera module increases
Solution Approach 1:
The patent combines two separate driving units onto a single surface of the lens holder, eliminating the need for separate surfaces and reducing the overall camera module size. The first and second driving units are integrated in close proximity, sharing common structural elements and space, which directly resolves the contradiction by merging previously separated components.
Solution Approach 2:
The patent implements a nested arrangement where the first coil and second coil are positioned to overlap or interleave with each other, and the first magnet and second magnet are similarly arranged. This nesting allows the driving units to occupy the same spatial region, minimizing the surface area required and reducing the camera module's overall footprint while maintaining functional separation.
2Adaptability or versatility
If multiple coils and magnets are used for 2-axis image stabilization, then image stabilization function is achieved, but production costs increase
Solution Approach 1:
The patent makes the first magnet and second magnet multi-functional by positioning them to interact with multiple coils. Each magnet serves dual purposes: interacting with its corresponding coil for primary actuation and with the adjacent coil for secondary actuation. This multi-functionality enables 2-axis image stabilization while reducing the total number of magnetic components required, thereby lowering production costs.
Solution Approach 2:
The patent merges the functions of multiple magnets and coils into a more compact configuration. By having the first and second magnets work together with both the first and second coils, the system achieves the same stabilization function with fewer discrete components, simplifying assembly and reducing manufacturing complexity and cost.
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 allows for a compact camera module with reduced production costs and effective 2-axis image stabilization.
Implementation Method 1
The coil to which current is applied may generate an electromagnetic force through electromagnetic interaction with the magnet
Data Source
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AI summary
There is disclosed a camera module. The camera module includes a camera housing including an image sensor, a lens assembly including a lens aligned with the image sensor in a direction of an optical axis, a first holder coupled to the lens assembly and configured to move together with the lens assembly in a first direction perpendicular to the optical axis and a second direction perpendicular to each of the optical axis and the first direction, a first magnet being disposed on a first side surface of the first holder, a first coil disposed on a first inner side surface of the camera housing, the first coil being disposed to at least partially overlap each of an N-pole region and an S-pole region of the first magnet when viewed in the second direction, and a second coil disposed on the first inner side surface of the camera housing and disposed adjacent to the first coil, the second coil being disposed to at least partially overlap any one of the N-pole region and the S-pole region of the first magnet when viewed in the second direction.