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 is designed with a movable portion connected to a fixed portion via a driving assembly, utilizing magnetic elements and coils to generate electromagnetic forces for movement, along with a resilient element and intermediate assembly to enhance mechanical strength and reduce friction, allowing for miniaturization and improved durability.
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 portable, but the durability and reliability of the optical system deteriorates
Solution Approach 1:
The optical system is divided into separate functional modules: a movable portion containing the optical element, a fixed portion with the driving assembly, and intermediate assembly components. This segmentation allows each module to be optimized independently for both size and durability, enabling the overall system to be compact while maintaining reliability through modular construction.
Solution Approach 2:
The intermediate assembly is positioned between the movable and fixed portions, acting as a nested structural element that reinforces the connection interface. This nested design strengthens the optical system at critical stress points without adding external bulk, allowing durability enhancement within the constrained volume of the compact system.
2Adaptability or versatility
If traditional optical systems are used in compact devices, then image-capturing and video-recording functions can be achieved, but the device size increases and durability decreases
Solution Approach 1:
The traditional mechanical focus adjustment mechanism is replaced with an electromagnetic driving assembly consisting of coils and magnetic elements. This substitution eliminates complex mechanical linkages, reducing the overall system volume while maintaining the image-capturing function through electromagnetic actuation of the optical element.
Solution Approach 2:
The optical system utilizes variable electromagnetic field parameters to control the position of the optical element for focus adjustment. By changing the electrical parameters (current, voltage) to the driving coils, the system achieves focus variation without mechanical movement of entire assemblies, thereby reducing device size while preserving imaging functionality.
3Volume of moving object
If the optical system is miniaturized for modern devices, then portability improves, but the complexity of achieving both auto focus and optical image stabilization increases
Solution Approach 1:
The driving assembly is designed with multiple coils arranged to provide both axial movement for auto focus and lateral stabilization for optical image stabilization. This multi-functional design allows a single integrated electromagnetic actuator system to perform both focus adjustment and stabilization functions, reducing overall system complexity compared to having separate mechanisms for each function in a miniaturized format.
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 achieves efficient auto focus and optical image stabilization while minimizing size and maximizing durability, enabling better performance in compact electronic devices.
Implementation Method 1
a driving assembly used for driving the movable portion to move relative to the fixed portion
Implementation Method 2
The first sensing assembly includes a first reference object and a first sensing element. The first sensing element corresponds to the first reference object. The first reference object includes a first magnetic portion and a second magnetic portion arranged along a first axis.
Implementation Method 3
The second sensing assembly includes a second reference object and a second sensing element. The second sensing element corresponds to the second reference object. The second reference object includes a third magnetic portion and a fourth magnetic portion arranged along a second axis.
Data Source
AI summary
An optical element driving mechanism is provided. The optical element driving mechanism includes a movable portion used for connecting an optical element, a fixed portion, and a driving assembly used for driving the movable portion to move relative to the fixed portion. The movable portion is movable relative to the fixed portion. The driving assembly is used for driving the movable portion to move relative to the fixed portion.