Optical Element Driving Mechanism for Compact AF-OIS Camera Modules

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Solution Overview

Problem

Existing camera module designs struggle to achieve both autofocus and optical image stabilization while maintaining miniaturization.

Innovation Solution

An optical element driving mechanism with a movable part and a driving assembly that allows for relative movement, incorporating a fixed assembly, a movable part, and a connecting assembly, which includes elastic members and coils to generate electromagnetic driving forces, enabling optical image stabilization without increasing the module's size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If existing driving mechanisms are used to achieve autofocus and optical image stabilization, then the camera module can perform photography and video recording functions, but the module size cannot be reduced further due to the complexity of accommodating both functions

Engineering Contradiction:

Improvecamera module sizeVSAvoidautofocus and optical image stabilization functions

Core Design Contradiction:

Volume of moving objectVSAdaptability or versatility

Solution Approach 1:

The patent combines the autofocus and optical image stabilization functions into a single integrated driving mechanism. The movable part simultaneously supports both the first optical element (for autofocus) and the second optical element (for optical image stabilization), allowing both functions to be achieved within a compact structure without requiring separate driving mechanisms.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The driving mechanism is designed with multi-functionality, where the same movable part and driving assembly serve dual purposes: driving the first optical element for autofocus and driving the second optical element for optical image stabilization. This universal design enables the camera module to perform multiple functions while maintaining miniaturization.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Volume of moving object

If the camera module is miniaturized, then the device size is reduced, but the ability to achieve both autofocus and optical image stabilization is compromised

Engineering Contradiction:

Improvecamera module sizeVSAvoidfocus and stabilization functionality

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The patent segments the optical elements into two distinct parts: the first optical element dedicated to autofocus functionality and the second optical element dedicated to optical image stabilization. Each optical element has its own accommodation space and can be independently driven, ensuring that both functions remain reliable even in a miniaturized module.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs a nested structure where the second accommodation space is located within the first accommodation space. The movable part has a long strip-shaped structure that accommodates both optical elements in a nested arrangement, allowing the camera module to maintain full functionality while significantly reducing the overall volume.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Volume of moving object

If a compact driving mechanism is designed, then the camera module achieves miniaturization, but the risk of collision and damage during movement increases

Engineering Contradiction:

Improvecamera module sizeVSAvoidcollision and damage risk

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent utilizes three-dimensional spatial arrangement to accommodate both optical elements and their driving mechanisms without interference. The first and second accommodation spaces are positioned in different spatial locations within the movable part, with the second accommodation space located within the first accommodation space. This dimensional arrangement prevents collision between components during movement while maintaining a compact overall structure.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 autofocus and optical image stabilization while reducing the overall weight and size of the camera module, preventing collisions and damage during rotation.

Implementation Method 1

the driving assembly is configured to drive the movable part to move relative to the fixed assembly

Methodology Applied

Scientific EffectElectromagnetic driving force: Electromagnetic Induction

Data Source

PatentUS12607901B2Optical element driving mechanism

Publication Date: 2026.04.21 ACTUTEK CORP

AI summary

An optical element driving mechanism is for accommodating a first optical element and includes a fixed assembly, a movable part and a driving assembly. The movable part is configured to connect a second optical element, the second optical element corresponds to the first 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. The fixed assembly includes a first accommodating space configured to accommodate the first optical element.