Lens Moving Apparatus with Elastic Support for Image Stabilization
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Solution Overview
Problem
Compact camera modules in devices like smartphones require an effective optical image stabilizer to counteract vibrations caused by user handshaking and movement, necessitating an improved lens moving apparatus for enhanced autofocusing and image stabilization.
Innovation Solution
A lens moving apparatus featuring a bobbin with a coil and a driving magnet, supported by elastic members and a support member that allows movement in multiple directions, enabling precise autofocusing and handshake correction through electromagnetic interaction and elastic deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional lens moving apparatus is used, then the structure is simple, but the optical image stabilizing effect is insufficient
Solution Approach 1:
The support member is divided into multiple projection portions (first, second, third projection portions) that can be independently deformed. Each projection portion connects to different components (upper elastic member, lower elastic member, housing), allowing independent movement control in different directions for effective image stabilization while maintaining a relatively simple overall structure.
Solution Approach 2:
The support member incorporates elastic deformation capabilities through its projection portions, transitioning from a rigid structure to a dynamic one. The first projection portion elastically deforms to enable bobbin movement along the optical axis, while the second and third projection portions allow perpendicular movements for image stabilization, achieving both simplicity and effectiveness.
2Adaptability or versatility
If the lens module is constrained to move only along the optical axis, then the structure is simple, but autofocus and image stabilization cannot be achieved simultaneously
Solution Approach 1:
The support member with its elastic projection portions serves multiple functions: the first projection portion enables autofocus by allowing optical axis movement, while the second and third projection portions simultaneously enable image stabilization by permitting perpendicular movements. This single structure replaces what would otherwise require separate mechanisms.
Solution Approach 2:
The support member utilizes elastic deformation of its projection portions to provide flexible movement capabilities. The elastic nature of the projections allows the structure to adapt to different movement requirements (autofocus and stabilization) without requiring rigid, complex mechanical linkages for each function.
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 apparatus effectively stabilizes images by allowing the lens module to move in multiple directions, improving autofocus accuracy and reducing image blur due to vibrations, thus enhancing the overall optical image stabilizing effect.
Implementation Method 1
a bobbin provided on an outer surface thereof with a coil disposed in the driving magnet and moving in a first direction in the housing
Implementation Method 2
an upper elastic member disposed above the bobbin and including an inner frame coupled to the bobbin and an outer frame coupled to the housing
Data Source
AI summary
A lens moving apparatus includes a housing supporting a driving magnet, a bobbin provided on an outer surface thereof with a coil disposed in the driving magnet and moving in a first direction in the housing, a base disposed under the bobbin to be spaced apart from the bobbin by a predetermined distance, an upper elastic member disposed above the bobbin and including an inner frame connected to the bobbin and an outer frame coupled to the housing, and a support member coupled at a lower portion thereof to the base and including a projecting portion protruding upward and bent at at least a portion thereof, at least a portion of the bent portion of the projecting portion being coupled to the upper elastic member.