Optical Element Drive Assembly for Compact OIS and Autofocus
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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 incorporates a movable and fixed portion connected through a driving assembly, including magnetic elements and a supporting structure with a limiting element, allowing for miniaturization and enhanced durability by using identical materials and a magnetic permeable element with a trapezoid shape, enabling precise movement of optical elements for auto focus and image stabilization.
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 be compromised
Solution Approach 1:
The driving mechanism is divided into distinct components: a driving assembly with magnetic elements for actuation, and a separate assisting assembly with limiting elements for guidance and support. This segmentation allows each component to be optimized independently - the driving assembly can be miniaturized while the assisting assembly provides structural durability through its limiting elements that constrain movement along the optical axis.
Solution Approach 2:
The assisting assembly introduces a new dimensional aspect by adding limiting elements that extend in directions perpendicular to the optical axis. These limiting elements provide structural support and constraints in lateral dimensions, enabling the driving mechanism to be compact along the optical axis while maintaining durability through enhanced lateral support and positioning.
2Measurement precision
If magnetic elements are used to enable precise movement for auto focus and image stabilization, then the positioning precision is improved, but the device complexity increases
Solution Approach 1:
The patent combines the driving function (magnetic elements for actuation) and the guiding function (limiting elements for constraint) into a single integrated assisting assembly structure. The limiting elements are positioned to work in conjunction with the magnetic elements, providing both structural support and movement constraints. This merging reduces the need for separate complex guiding mechanisms while maintaining precise positioning control through the coordinated action of magnetic and mechanical elements.
Solution Approach 2:
The assisting assembly acts as an intermediary between the driving assembly and the optical element. It translates the magnetic forces from the driving assembly into precise linear movement along the optical axis while the limiting elements mediate the movement constraints, ensuring the optical element moves only in the desired direction. This intermediary structure simplifies the overall system by providing a straightforward mechanical-magnetic coupling rather than requiring complex direct actuation mechanisms.
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 increased durability, allowing for effective auto focus and optical image stabilization while reducing the size of the driving mechanism, thereby addressing the need for smaller and more robust optical element driving systems in modern devices.
Implementation Method 1
the driving assembly includes a first magnetic element disposed on the movable portion and a second magnetic element disposed on the fixed portion
Data Source
AI summary
An optical element driving mechanism is provided, including a movable portion, a fixed portion, a driving assembly, and an assisting 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 is disposed on the movable portion or the fixed portion for driving the movable portion to move relative to the fixed portion. The movable portion is movably connected to the fixed portion through the assisting assembly.