Lens Driving Mechanism Magnetic Interference
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Solution Overview
Problem
Current multiple-lens camera modules experience magnetic interference between lens-driving modules, affecting focus speed and accuracy due to the close proximity of magnetic components, which hinders the development of efficient optical camera systems.
Innovation Solution
The optical camera system incorporates a design with multiple lens driving mechanisms arranged in a specific configuration where the second lens driving mechanism does not have a magnetic member between the first and second optical components, and utilizes shape memory alloy and electromagnetic driving assemblies to prevent magnetic interference, allowing for independent movement of optical components while maintaining electromagnetic compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple lens driving mechanisms are arranged in close proximity to achieve compact camera module design, then the occupied volume is reduced, but magnetic interference is generated between magnets in different lens-driving modules affecting focus speed and accuracy
Solution Approach 1:
A non-magnetic support structure is introduced as an intermediary between multiple lens driving mechanisms. This support structure physically separates the mechanisms while maintaining their functional integration, preventing magnetic interference between adjacent lens modules without sacrificing compactness. The non-magnetic material acts as a mediator that allows close proximity arrangement while eliminating the harmful magnetic interaction.
2Adaptability or versatility
If lens driving mechanisms are positioned close together to enable multiple-lens functionality, then device compactness is improved, but focus speed and accuracy deteriorate due to magnetic interference
Solution Approach 1:
The camera module is segmented into multiple independent lens driving mechanisms, each capable of controlling a specific lens. The non-magnetic support structure provides separate mounting positions for each mechanism, allowing them to function independently without magnetic interference. This segmentation enables multiple-lens functionality while maintaining individual focus accuracy for each lens module.
3Volume of moving object
If magnetic components are placed in close proximity to reduce module size, then miniaturization is achieved, but electromagnetic compatibility is compromised
Solution Approach 1:
The support structure is designed with locally differentiated properties: non-magnetic materials are used specifically in regions where magnetic components are positioned adjacent to each other, while other regions may use different materials optimized for their specific functions. This local quality approach maintains electromagnetic compatibility in critical areas while allowing miniaturization overall.
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 configuration enhances the focus speed and accuracy by minimizing electromagnetic interference, enabling the capture of clearer images with reduced occupied volume and improved miniaturization, while allowing for different photography effects through varying focal lengths and image processing.
Implementation Method 1
the second driving assembly includes a shape memory alloy driving assembly
Implementation Method 2
the second driving assembly includes a first driving magnetic member and a first driving coil
Data Source
AI summary
An optical camera system includes a first lens driving mechanism, a second lens driving mechanism, and a casing. The first lens driving mechanism includes a first outer frame and a first driving assembly. The first driving assembly is configured to drive a first optical component to move relative to the first outer frame. The second lens driving mechanism includes a second outer frame and a second driving assembly. The second driving assembly is configured to drive a second optical component to move relative to the second outer frame. The casing has at least three side walls perpendicular to each other, at least two side walls of the first outer frame face two side walls of the casing, and at least two side walls of the second outer frame face two side walls of the casing.