Anti-shake Auto-focus Modular Structure for Compact Camera Modules
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Solution Overview
Problem
Advanced camera devices face the challenge of increasing volume due to the addition of multiple functions like high-pixel imaging, multi-point auto-focus, and anti-shake features, necessitating a modular structure that integrates these functions seamlessly while minimizing size.
Innovation Solution
An anti-shake auto-focus modular structure that combines auto-focus and anti-shake functions into a single camera lens module, utilizing a voice coil motor for focusing and a deviation compensation mechanism with electromagnetic fields and sensors to adjust the lens position in the x and y axes, allowing precise compensation for hand movement-induced shake.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple functions (high-pixel imaging, multi-point auto-focus, anti-shake) are added to the camera device, then the image quality and functionality are improved, but the volume of the image capturing module increases
Solution Approach 1:
The patent merges the auto-focus module and anti-shake module into a single integrated structure. The auto-focus module includes a lens assembly that can move along the optical axis for focusing, while the anti-shake module uses suspension wires to allow the same lens assembly to move in directions perpendicular to the optical axis for shake compensation. This integration eliminates the need for separate mechanisms, thereby reducing the overall volume of the image capturing module while maintaining both auto-focus and anti-shake functionalities.
Solution Approach 2:
The lens assembly serves multiple functions: it is the focusing element for auto-focus operation and simultaneously the element that is suspended and allowed to move for anti-shake compensation. The suspension wires serve dual purposes of supporting the lens assembly and enabling its movement for shake compensation. This multi-functionality reduces the number of separate components needed, thereby reducing volume.
2Reliability
If separate auto-focus and anti-shake mechanisms are used, then each function can be optimized independently, but the device complexity and volume increase
Solution Approach 1:
The patent combines the auto-focus and anti-shake mechanisms into a single integrated structure where the lens assembly is suspended by wires that allow independent movement in both the optical axis direction (for auto-focus) and directions perpendicular to the optical axis (for anti-shake). This merging reduces structural complexity compared to having separate mechanisms while maintaining the ability to optimize each function independently through controlled movement along different axes.
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 integration reduces the overall volume of the camera lens module, enabling it to be compactly built into portable devices like mobile phones while maintaining high image quality and functionality.
Implementation Method 1
The VCM includes an assembly of windings, magnets and plate springs to hold a lens thereto, so that the lens is able to move forward and rearward in an optical axis direction
Implementation Method 2
a deviation compensation winding assembly including at least one x-axis driving winding and at least one y-axis driving winding, which each being capable of producing an electromagnetic field according to the movement signal generated by the shake sensor
Implementation Method 3
an x-axis displacement sensor and a y-axis displacement sensor being arranged to one side of the x-axis driving winding and the y-axis driving winding, respectively, to thereby correspond to the x-axis magnet and the y-axis magnet, respectively, for detecting whether an x-axis deviation volume or a y-axis deviation volume produced by the x-axis magnet or the y-axis magnet during movement thereof has reached a deviation compensation position
Data Source
AI summary
An anti-shake auto-focus modular structure includes an image sensor, an auto-focus module for driving a lens to focus captured image on the image sensor; a plurality of suspension wires for suspending the auto-focus module at a position perpendicular to a light entering direction (z-axis), so that the auto-focus module is movable in an x-axis or a y-axis direction; a deviation compensation magnet assembly including at least one x-axis magnet and at least one y-axis magnet; a deviation compensation assembly including at least one x-axis driving winding and at least one y-axis driving winding corresponding to the x-axis magnet and the y-axis magnet, respectively, for producing an electromagnetic field each to drive the x-axis or the y-axis magnet and accordingly the auto-focus module to move in the x-axis or the y-axis direction for compensating a positional deviation of the auto-focus module in the x-axis or the y-axis direction.