Integrated Optical Drive Mechanism for Compact Aperture and Focus
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Solution Overview
Problem
Modern electronic devices with image-capturing and video-recording functions face challenges in reducing the size of optical modules while maintaining durability and efficiency.
Innovation Solution
A driving mechanism incorporating a movable part, connecting part, first and second driving units, and a holder, utilizing SMA elements and a housing to adjust the aperture size, enhancing mechanical strength and preventing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional optical module designs are used, then the optical module can maintain basic functionality, but the size remains large and durability is insufficient
Solution Approach 1:
The patent combines the aperture driving mechanism and focusing driving mechanism into a single integrated structure. The connecting part serves as a common base for both the movable part (aperture blades) and the holder (focusing lens), merging two separate driving systems into one compact unit. This integration reduces the overall volume of the optical module while maintaining the reliability of both aperture control and focusing functions through shared structural support and coordinated actuation.
2Volume of moving object
If the optical module size is reduced, then device compactness improves, but mechanical strength and durability may be compromised
Solution Approach 1:
The patent segments the optical module into distinct functional components: the connecting part (base structure), the movable part (aperture blades with independent actuation), and the holder (focusing lens with separate actuation). Each segment is optimized for its specific function while maintaining compact dimensions. The connecting part provides a robust central core for mechanical strength, while the movable and holder portions can be miniaturized for compactness without compromising overall structural integrity.
3Reliability
If traditional driving mechanisms are used for optical elements, then basic actuation is achieved, but electromagnetic interference may occur and mechanical strength is insufficient
Solution Approach 1:
The patent introduces a connecting part as an intermediary structure between the aperture driving unit and the holder. This connecting part serves as a mechanical mediator that transmits actuation forces while providing electromagnetic shielding and isolation. By using a non-conductive or shielded connecting structure, the patent mediates the interaction between different driving mechanisms, preventing electromagnetic interference while maintaining mechanical coupling for coordinated 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
The mechanism effectively reduces the size of optical modules, increases durability, and maintains high efficiency and stability by using SMA elements to impel optical units, while preventing electromagnetic interference.
Implementation Method 1
The first driving unit comprises an SMA element. When a current signal is applied to the SMA element, the SMA element shrinks from a first length to a second length and impels the movable part from the first position to a second position relative to the connecting part.
Implementation Method 2
The second driving unit includes a coil disposed on the holder and a magnetic element disposed on the base.
Data Source
AI summary
A driving mechanism for moving an optical unit is provided, including a variable aperture module and a Voice Coil Motor module. The variable aperture module has a bottom plate connected to a lens holder of the Voice Coil Motor module. Specifically, the variable aperture module and the Voice Coil Motor are received in the same housing, so as to enhance the structural strength of the driving mechanism.