Driving Mechanism for Optical Elements Using Flexible Element Deformation
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Solution Overview
Problem
Existing driving mechanisms for camera modules in electronic devices face challenges in miniaturization while maintaining auto focusing and optical image stabilization functions, as they require longer elastic assemblies that are prone to breakage and difficulty in precise position control.
Innovation Solution
A driving mechanism comprising a fixed and movable part connected by a flexible element, where the flexible element deforms to detect position changes, allowing for two-step movement and larger relative moving range of optical elements, enhancing miniaturization and reducing the risk of elastic assembly breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If existing driving mechanisms use longer elastic assemblies to achieve larger moving range, then the relative moving range of optical elements is improved, but the risk of elastic assembly breakage increases
Solution Approach 1:
The flexible element is divided into multiple segments or sections, each capable of independent deformation. This segmentation allows the element to distribute stress more evenly across its structure, preventing any single point from bearing excessive load that could lead to breakage, while collectively providing the necessary range of motion for the optical elements.
Solution Approach 2:
The patent modifies the physical parameters of the flexible element, including its material composition, cross-sectional geometry, and elastic modulus distribution. By optimizing these parameters, the element achieves enhanced flexibility and stress distribution characteristics that enable larger movement ranges without increasing breakage risk.
2Volume of moving object
If existing driving mechanisms are miniaturized to reduce device size, then the compactness is improved, but the ability to maintain precise position control deteriorates
Solution Approach 1:
The patent incorporates feedback mechanisms that utilize the deformation characteristics of the flexible element to detect and control the position of movable parts. By measuring the deformation state of the flexible element, the system can precisely determine the position of optical elements and adjust accordingly, maintaining high positioning accuracy despite the miniaturized scale of the overall mechanism.
3Measurement precision
If existing driving mechanisms use complex elastic assemblies to achieve precise position detection, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The flexible element serves dual functions: it provides the mechanical connection and movement capability while simultaneously acting as the sensing element for position detection. The element's inherent deformation properties are utilized directly for position measurement, eliminating the need for separate complex sensing mechanisms and thereby reducing overall device complexity while maintaining measurement precision.
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 solution enables a more compact design with improved durability and precise control of optical elements, allowing for a greater range of focal lengths and reduced risk of elastic assembly breakage, while maintaining effective auto focusing and optical image stabilization.
Implementation Method 1
The flexible element is connected to the fixed part and the movable part, wherein when the movable part moves relative to the fixed part, the flexible element deforms so that the position of the movable part relative to the fixed part is detected
Data Source
AI summary
A driving mechanism for moving an optical element is provided, including a fixed part, a movable part, a driving assembly, and a flexible element. The movable part is connected to the optical element. The driving assembly drives the movable part to move relative to the fixed part. The flexible element is connected to the fixed part and the movable part. When the movable part moves relative to the fixed part, the flexible element deforms so that the position of the movable part relative to the fixed part can be detected.