Optical Element Driving Mechanism for Compact Auto 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 systems while maintaining durability and achieving effective auto focus and optical image stabilization.
Innovation Solution
An optical element driving mechanism comprising a movable portion, a fixed portion, and a driving assembly, which includes driving magnetic elements, coils, and resilient elements, allowing for the relative movement of optical elements to achieve auto focus and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the optical system size is reduced to meet modern device requirements, then the device becomes more compact and lightweight, but the durability and performance of the optical system deteriorate
Solution Approach 1:
The optical system is divided into separate functional modules: a movable portion containing the optical element (lens), a fixed portion containing the base and case, and a driving assembly with electromagnetic components. This segmentation allows each module to be optimized independently, enabling compact design while maintaining structural integrity and durability through proper distribution of mechanical and electromagnetic functions across discrete components.
Solution Approach 2:
The driving assembly with electromagnetic components is nested within the fixed portion, which itself is contained within the case. The movable portion with the optical element is positioned within the overall structure, creating a compact nested arrangement where smaller components are housed within larger structures, achieving miniaturization without compromising the protective enclosure and structural strength.
2Volume of moving object
If the optical element driving mechanism is miniaturized, then the device achieves better integration and smaller form factor, but the complexity of the driving mechanism increases
Solution Approach 1:
The patent replaces traditional mechanical driving mechanisms (such as motors, gears, or linkages) with an electromagnetic driving assembly consisting of coils and magnetic elements. This substitution eliminates complex mechanical transmission components, reducing the overall size and complexity of the driving mechanism while achieving precise control of the optical element's movement through direct electromagnetic actuation.
Solution Approach 2:
The driving assembly is designed to perform multiple functions: it provides both the driving force for moving the optical element and incorporates resilient elements that simultaneously serve as positioning and damping components. The magnetic elements and coils work together to achieve both actuation and stabilization functions, reducing the need for separate dedicated components and thereby simplifying the overall system.
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 enables efficient auto focus and optical image stabilization while reducing the size of the optical system, enhancing durability and image stabilization performance.
Implementation Method 1
a driving coil disposed on the movable portion and corresponding to the first driving magnetic element
Implementation Method 2
a resilient element connecting the movable portion and the fixed portion
Data Source
AI summary
An optical element driving mechanism is provided. The optical element driving mechanism includes a movable portion, a fixed portion, and a driving assembly. The movable portion is used to connect the optical element. The movable portion may move relative to the fixed portion. The driving assembly is used to drive the movable portion to move relative to the fixed portion.