Optical Member Drive With Piezoelectric Motion and Magnetic Guidance

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Solution Overview

Problem

Existing optical member driving mechanisms in electronic devices face challenges in efficiently and precisely moving optical components, such as camera lenses, while maintaining compact size and minimizing interference and friction, which affects the optical quality and operational reliability.

Innovation Solution

An optical member driving mechanism with a movable portion, fixed portion, and a driving assembly that includes a transferring and guiding assembly, utilizing a piezoelectric driving source, amplifying member, and magnetic guidance to ensure precise movement and reduced friction, while maintaining a compact design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional driving mechanisms are used to move optical components, then the optical member can be driven to move, but friction and interference increase, reducing optical quality and reliability

Engineering Contradiction:

Improveoperational reliabilityVSAvoidfriction and interference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces traditional mechanical contact-based driving mechanisms with a magnetic field-based driving system. The driving assembly generates a magnetic field that acts on the movable portion containing magnetic members, enabling contactless driving of the optical member. This substitution eliminates friction and mechanical interference, thereby improving operational reliability and optical quality.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If the driving assembly is designed with high precision components, then movement precision improves, but device complexity increases

Engineering Contradiction:

Improvemovement precisionVSAvoidstructural complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent uses magnetic field interaction instead of complex mechanical linkages to achieve precise movement. The driving assembly generates controlled magnetic fields that interact with magnetic members in the movable portion, providing precise positional control without requiring complex mechanical guidance structures. This reduces device complexity while maintaining high movement precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent employs dynamic magnetic field control to achieve precise movement. The driving assembly can dynamically adjust the magnetic field distribution to control the position and movement of the optical member, enabling high precision without static mechanical constraints. This dynamic approach simplifies the overall structure compared to static mechanical precision systems.

Inventive Principle:

Principle #15Dynamics

3Volume of moving object

If the optical member driving mechanism is miniaturized, then device size reduces, but assembly difficulty increases

Engineering Contradiction:

Improvedevice sizeVSAvoidassembly efficiency

Core Design Contradiction:

Volume of moving objectVSEase of manufacture

Solution Approach 1:

The patent integrates multiple functions into unified components. The driving assembly and guiding assembly are merged into a compact structure where magnetic field generation and movement guidance are combined. The movable portion integrates the optical member holder, magnetic members, and flexible support structure into a single assembly unit. This merging reduces overall device size and simplifies assembly procedures.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent employs a nested structure where the movable portion with magnetic members is positioned within the driving assembly's magnetic field generation region. The guiding assembly structures are nested within the overall compact housing, with components arranged in concentric or layered configurations. This nesting enables miniaturization while maintaining functional integrity and facilitating assembly.

Inventive Principle:

Principle #7Nested doll (Nesting)

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

Enhances the reliability and optical quality of optical component movement, allowing for functions like focusing, zooming, and optical image stabilization with reduced friction and interference, facilitating miniaturization and improved assembly efficiency.

Implementation Method 1

utilizing a piezoelectric driving source

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Implementation Method 2

magnetic guidance

Methodology Applied

Scientific EffectMagnetic force: Magnetism

Data Source

PatentUS20250355319A1Optical member driving mechanism

Publication Date: 2025.11.20 TDK CORP

AI summary

An optical member driving mechanism is provided, including a movable portion, a fixed portion, and a driving assembly. The movable portion is configured to connect an optical member, and the movable portion is movable relative to the fixed portion. The driving assembly is configured to drive the movable portion to move.