Optical Driving Mechanism Linear Spring Constant
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Solution Overview
Problem
The spring constant of elastic elements in optical driving mechanisms becomes nonlinear during large driving strokes, affecting the image quality and stability of electronic devices equipped with lens modules.
Innovation Solution
The optical driving mechanism employs a holder connected to a fixed portion via first and second elastic elements, with the first elastic element having a plate-like structure and strip strings, and the second elastic element having a different thickness and configuration, ensuring a constant spring constant even during large displacements by allowing both string types to deform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the elastic element has a certain thickness and is used for large driving stroke, then the driving capability is improved, but the spring constant becomes nonlinear
Solution Approach 1:
The elastic element is divided into multiple string portions (first string portion, second string portion, third string portion) with different structural characteristics. Each portion contributes differently to the overall elasticity, allowing the system to maintain linear spring constant across large driving strokes while providing sufficient driving capability.
2Reliability
If the elastic element is made thinner to maintain linear spring constant, then the spring constant linearity is improved, but the driving capability is reduced
Solution Approach 1:
The elastic element combines multiple string portions with different thicknesses and structural configurations to create a composite elastic structure. This allows the system to maintain linear spring constant characteristics while providing sufficient driving capability for large strokes, as each portion contributes differently to the overall mechanical response.
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 configuration maintains a linear spring constant, enhancing the stability and image quality of the optical driving mechanism by preventing nonlinear spring behavior during large driving strokes.
Implementation Method 1
The holder is movably connected to the fixed portion via the first elastic element. The first elastic element is connected to the holder or the fixed portion via the first adhesive elements.
Data Source
AI summary
An optical driving mechanism is provided, including a holder, a fixed portion, a first elastic element, and a first adhesive element. The holder is configured to connect an optical element, and moves relative to the fixed portion. The holder is movably connected to the fixed portion via the first elastic element, and the first elastic element is connected to the holder or the fixed portion via the first adhesive element.