Optical Element Driving Mechanism for Tilt-Free Miniature Cameras
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Solution Overview
Problem
Existing camera module driving mechanisms struggle to achieve autofocus and optical image stabilization while maintaining miniaturization, leading to potential tilting of optical elements and unclear images.
Innovation Solution
An optical element driving mechanism with a fixed assembly, movable part, and driving assembly, incorporating guiding assemblies with stabilizing elements and magnetic forces to stabilize the movable part during movement, preventing tilting and ensuring smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the camera module is miniaturized, then the size is reduced, but the stability of optical element movement deteriorates
Solution Approach 1:
The camera module is divided into distinct functional components: a driving mechanism for movement control and guiding assemblies for stability maintenance. The guiding assembly includes separate guiding components (guiding grooves and guiding blocks) that independently constrain movement to the optical axis direction, separating the stabilization function from the driving function to ensure stability even in miniaturized configurations
Solution Approach 2:
The guiding assembly acts as an intermediary mechanism between the driving mechanism and the optical element. It includes guiding grooves formed on the movable support and guiding blocks on the fixed support that interact to constrain and guide the movable support's movement, ensuring the optical element moves only along the optical axis without tilting or deviating
2Speed
If the driving mechanism provides strong driving force, then the autofocus speed is improved, but the tilting of optical element increases
Solution Approach 1:
The system separates driving function and guiding function into independent assemblies. The driving mechanism provides strong driving force for fast autofocus, while the guiding assembly with its grooves and blocks independently maintains optical element orientation stability, allowing both high speed and stability to coexist
Solution Approach 2:
The guiding grooves and guiding blocks create a constrained movement path that maintains constant orientation throughout the movement range. The geometric constraints ensure the optical element remains in a stable orientation state regardless of the driving force magnitude or position in the focal range
3Volume of moving object
If the camera module is miniaturized, then the size is reduced, but the image clarity deteriorates due to tilting
Solution Approach 1:
The guiding assembly serves as an intermediary that ensures precise optical element positioning and orientation even in miniaturized modules. The guiding grooves and blocks maintain accurate alignment throughout movement, preventing tilting that would compromise image clarity in small-form-factor cameras
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 enhances stability and prevents tilting of optical elements, ensuring clear images by guiding the movable part's movement and providing magnetic stabilization, thus addressing the challenges of miniaturization and functionality.
Implementation Method 1
a driving mechanism with a camera lens holder configured to hold a camera lens, and the driving mechanism can have the functions of auto focusing or optical image stabilization
Implementation Method 2
incorporating guiding assemblies with stabilizing elements and magnetic forces to stabilize the movable part during movement
Data Source
AI summary
An optical element driving mechanism is provided. The optical element driving mechanism includes a fixed assembly, a movable part, and a driving assembly. The fixed assembly has a main axis. The movable part is configured to be connected to an optical element, and the movable part is movable relative to the fixed assembly. The driving assembly is configured to drive the movable part to move relative to the fixed assembly.