Optical Element Drive Mechanism With Magnetic Assist and Motion Limits
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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 element driving mechanisms while maintaining durability and achieving auto focus and optical image stabilization.
Innovation Solution
The optical element driving mechanism includes a movable portion, a fixed portion, a driving assembly, and an assist assembly, which allows the movable portion to rotate in multiple axes using magnetic forces and position sensors, enabling miniaturization and enhanced durability by limiting movement and generating magnetic forces for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the driving mechanism is made smaller to meet modern device requirements, then the size is reduced, but the durability and reliability may deteriorate
Solution Approach 1:
The driving mechanism is divided into separate functional modules: a driving assembly with driving magnets for generating motion, and an assist assembly with support elements and limit portions for providing structural support and movement limits. This segmentation allows each module to be optimized independently - the driving assembly can be minimized for size while the assist assembly provides the necessary structural integrity for durability.
Solution Approach 2:
The assist assembly acts as an intermediary between the driving assembly and the optical element. It includes support elements that provide structural support and limit portions that define movement boundaries, thereby ensuring reliable and durable operation without requiring the entire mechanism to be large.
2Volume of moving object
If the driving mechanism is made smaller, then the size is reduced, but the precision of optical element positioning may worsen
Solution Approach 1:
Position sensors are integrated into the movable portion to detect the position of the optical element in real-time. This feedback information is used to precisely control the driving assembly, ensuring accurate positioning of the optical element even within a compact mechanism. The support elements further enhance positioning precision by providing stable reference points for the optical element.
Solution Approach 2:
The patent replaces traditional mechanical positioning systems with a magnetic field-based driving assembly combined with electronic position sensing and control. This substitution allows for more precise positioning control in a smaller package, as magnetic actuators can achieve fine position control without the bulk of mechanical gears or linkages.
3Volume of moving object
If the driving mechanism is made smaller, then the size is reduced, but the complexity of the system may increase
Solution Approach 1:
The assist assembly serves multiple functions simultaneously: it provides structural support for the optical element, defines the movement limits through limit portions, and works together with the driving assembly to enable precise positioning. This multi-functionality reduces the need for separate components, thereby managing system complexity while achieving miniaturization.
Solution Approach 2:
The movable portion integrates multiple functions into a single component: it holds the optical element, contains the position sensors, and interfaces with both the driving assembly and assist assembly. This merging of functions reduces the total number of separate parts and simplifies the overall system architecture despite the advanced capabilities.
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 achieves miniaturization and improved performance by allowing the optical element to move in multiple directions, enhancing auto focus and optical image stabilization while reducing the overall size and increasing durability of the driving mechanism.
Implementation Method 1
a magnetic force is generated between the magnetic permeable element and the support element to attract the magnetic permeable element and the support element
Data Source
AI summary
An optical element driving mechanism is provided. The optical element driving mechanism includes a movable portion, a fixed portion, a driving assembly, and an assist assembly. The movable portion is used for connecting to an optical element having a main axis. The movable portion is movable relative to the fixed portion. The driving assembly drives the movable portion to move relative to the fixed portion. The assist assembly limits the movement of the movable portion relative to the fixed portion.