Camera Module Lens Actuation via Merged Magnetic Coils
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Solution Overview
Problem
Camera modules with auto-focusing and optical image stabilizing functions face challenges in miniaturization, as additional driving elements for vibration compensation increase volume, complicate manufacturing, and reduce efficiency.
Innovation Solution
A camera module design featuring a fixture with a moving part, multiple magnets, and coils arranged to enable simultaneous auto-focusing and stabilization through magnetic interaction, allowing vertical and horizontal movement of the lens using a single set of coils and magnets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional driving elements are mounted for vibration compensation, then optical image stabilizing function is achieved, but volume of the camera module increases
Solution Approach 1:
The patent combines the auto-focusing driving element and the optical image stabilizing driving element into a single integrated driving mechanism. This merging eliminates the need for separate driving elements, thereby achieving vibration compensation functionality while preventing the camera module volume from increasing due to additional components.
Solution Approach 2:
The single driving element is designed to perform multiple functions: both auto-focusing (vertical movement of the lens) and optical image stabilization (horizontal/vertical compensation of lens vibration). This multi-functionality allows one component to replace what would traditionally require multiple separate components, thus maintaining compact size while achieving stabilization.
2Reliability
If additional driving elements are mounted for vibration compensation, then optical image stabilizing function is achieved, but manufacturing process becomes complicated
Solution Approach 1:
By merging the auto-focusing and stabilization driving elements into a single integrated unit, the patent reduces the number of parts that need to be manufactured and assembled. This simplification of the component count directly reduces manufacturing process complexity and improves ease of production.
3Reliability
If additional driving elements are mounted for vibration compensation, then optical image stabilizing function is achieved, but manufacturing efficiency is reduced
Solution Approach 1:
The integration of multiple driving functions into a single element reduces the total number of components that need to be sourced, assembled, and tested. This reduction in assembly steps and component handling directly improves manufacturing efficiency and productivity.
4Device complexity
If a single set of coils and magnets is used for both auto-focusing and stabilization, then structure is simplified, but control precision must be maintained
Solution Approach 1:
Although using a single set of coils and magnets, the patent employs independent control signals for different coil groups to achieve different functions. The control unit segments the control signals to selectively activate specific coil combinations, enabling precise control over lens movement direction and magnitude, thus maintaining control precision despite structural simplification.
Solution Approach 2:
The system dynamically adjusts which coils are activated and at what power levels based on the required function (auto-focusing vs. stabilization). This dynamic control allows the single set of magnets and coils to adaptively perform different functions with appropriate precision for each operation.
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 design simplifies the structure, enabling effective auto-focusing and trembling compensation while maintaining a compact form, improving manufacturing efficiency and optical performance.
Implementation Method 1
A camera module design featuring a fixture with a moving part, multiple magnets, and coils arranged to enable simultaneous auto-focusing and stabilization through magnetic interaction
Implementation Method 2
coils arranged at the fixture and positioned at areas opposite to the plurality of magnets
Data Source
AI summary
The present disclosure relates to a camera module including a fixture; a moving part centrally coupled with a lens and arranged to move relative to the fixture; three or more magnets arranged at a periphery of the moving part; and three or more coils arranged from an inner surface of the fixture to areas opposite to the three or more magnets, where each of the coils independently receives a control signal so that the moving part moves to a height direction and tilted relative to a central axis of the moving part, whereby a lens can be axially moved and tilted at the same time using arrangement of a single set of coils and magnets.