Optical Element Driving Mechanism for Miniature Blade Aperture Control
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Solution Overview
Problem
The challenge of designing a miniature driving mechanism for optical elements in miniaturized electronic devices has not been adequately addressed, particularly in terms of reducing the size of components while maintaining functionality.
Innovation Solution
An optical element driving mechanism is designed with a fixed portion, movable element, blades, and a driving assembly, incorporating features like concave portions for component accommodation, anti-reflection structures, and a magnetic driving system to enable precise movement and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of optical modules is reduced to achieve miniaturization, then the device size is decreased, but the complexity of designing the driving mechanism increases
Solution Approach 1:
The patent implements nesting by placing the driving assembly inside the optical module housing, with the movable element positioned within the fixed portion. The blades are integrated with the movable element, and the magnetically permeable element is embedded in the base. This nested arrangement allows multiple components to occupy overlapping spatial volumes, achieving miniaturization while maintaining functional complexity.
Solution Approach 2:
The patent utilizes the optical axis dimension to arrange components at different depths within the housing. The base is positioned farther from the opening than the upper cover, creating depth-wise separation. The magnetically permeable element is placed in a first concave portion at a specific depth, while the guiding assembly is in a second concave portion at a different depth, allowing compact three-dimensional packaging that resolves the contradiction between small volume and design complexity.
2Volume of moving object
If components are placed closer together to reduce overall size, then the device volume is decreased, but the manufacturing precision requirements increase
Solution Approach 1:
The patent divides the housing into distinct concave portions: a first concave portion for the magnetically permeable element, a second concave portion for the guiding assembly, a third concave portion for the circuit assembly, and a fourth concave portion for the sensing element. Each concave portion is positioned at a specific depth and location, providing dedicated spaces that reduce the need for high-precision relative positioning while achieving compact overall dimensions.
Solution Approach 2:
The patent applies local quality by creating specific geometric features at precise locations: the first concave portion has a bottom surface at a specific depth to accommodate the magnetically permeable element, while the second concave portion has a bottom surface at a different depth for the guiding assembly. This localized structural differentiation allows components to be positioned closely together with reduced manufacturing precision requirements, as each component has its own optimized space.
3Object-affected harmful factors
If the overlap area of blades and opening is reduced to improve optical performance, then the optical quality is enhanced, but the device area increases
Solution Approach 1:
The patent implements dynamic control by allowing the movable element to rotate relative to the fixed portion, changing the overlap area between the blades and the opening during operation. The driving assembly rotates the movable element to adjust the overlap area dynamically, enabling the system to optimize optical performance when needed while maintaining a compact area through efficient spatial arrangement of the blade structure.
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 miniaturization by optimizing component placement and reducing overlap areas, enhancing precision and functionality in optical element movement.
Implementation Method 1
a magnetically permeable element disposed on the fixed portion
Data Source
AI summary
An optical element driving mechanism has an optical axis, and includes a fixed portion, a movable element, a plurality of blades, and a driving assembly. The fixed portion has an opening. The movable element is movable relative to the fixed portion. The blades are connected to the movable element. The driving assembly drives the movable element to move relative to the fixed portion. The driving assembly drives the movable element to change an overlap area of the blade and the opening.