Integrated Lens Driving Assembly for Autofocus and Image Stabilization
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Solution Overview
Problem
The integration of autofocus and optical image stabilization functions in camera modules increases the complexity of manufacturing processes and costs due to the increased number of parts and complicated coupling relationships.
Innovation Solution
A camera module design featuring a lens driving device with a bobbin, coils, magnets, and elastic members that resiliently connect the bobbin, housing, and substrate, allowing for both autofocus and optical image stabilization functions while maintaining a compact structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If autofocus and optical image stabilization functions are integrated into camera module, then functional versatility is improved, but device complexity increases due to increased number of parts and complicated coupling relationships
Solution Approach 1:
The patent combines autofocus and optical image stabilization functions into a single integrated lens driving device. The housing simultaneously accommodates both the first coil for autofocus and the second coil for optical image stabilization, along with a single magnet that interacts with both coils. This merging approach enables dual functionality while reducing the overall number of separate components and simplifying the coupling relationships between parts.
Solution Approach 2:
The housing serves multiple functions: it contains the magnet, supports both coils, provides magnetic shielding, and acts as a structural framework for the entire lens driving device. The single magnet performs dual roles by interacting with both the first coil for autofocus and the second coil for optical image stabilization. This multi-functionality reduces the need for separate dedicated components for each function.
2Adaptability or versatility
If autofocus and optical image stabilization functions are integrated into camera module, then functional versatility is improved, but manufacturing complexity increases
Solution Approach 1:
The patent integrates both autofocus and optical image stabilization mechanisms into a single housing structure, allowing both functions to be manufactured and assembled together as one unit. This reduces the number of separate assembly operations and simplifies the manufacturing process compared to producing separate autofocus and stabilization devices that would need to be coupled together.
3Device complexity
If compact structure is achieved by reducing components, then device complexity is reduced, but functional reliability may worsen due to fewer supporting structures
Solution Approach 1:
The housing performs multiple critical functions simultaneously: it provides structural support for the bobbin and coils, contains the magnet, provides magnetic shielding through its conductive material, and serves as the mounting framework for the entire assembly. This multi-functionality allows the structure to be simplified without compromising reliability, as the housing itself provides the necessary support and protection that would otherwise require separate components.
Solution Approach 2:
The housing is made of conductive material specifically in the regions where magnetic shielding is needed, while maintaining structural integrity in other areas. This localized application of specific material properties allows the design to achieve both compactness and reliability without adding unnecessary components throughout the entire structure.
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 both autofocus and optical image stabilization functions while simplifying the manufacturing process and reducing costs by minimizing the number of components and their coupling complexity.
Implementation Method 1
a first coil disposed on the bobbin; a magnet disposed in the housing and facing the first coil; a substrate comprising a second coil facing the magnet
Implementation Method 2
a lower elastic member connecting the bobbin and the housing
Data Source
AI summary
A lens driving apparatus, a camera module including the lens driving apparatus, and an optical device including the camera module are provided. The lens driving apparatus includes a base; a first substrate placed on the base; a housing placed on the first substrate; a bobbin placed inside the housing; a lower resilient member for coupling the bobbin and the housing; a first coil placed on the bobbin; a magnet placed on the housing and facing the first coil; and a second substrate placed on the first substrate and comprising a second coil which faces the magnet. The lower resilient member is connected to the first substrate or the second substrate.