Optical Member Driving Mechanism Resonance Control

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Solution Overview

Problem

Conventional optical member driving mechanisms used in 3D modeling and laser projectors are complex and expensive, posing a challenge in addressing their inefficiencies.

Innovation Solution

An optical member driving mechanism comprising a movable portion connected to an optical member, a fixed portion, a first driving assembly, and a first intermediate assembly, which provides a first driving force to move the movable portion relative to the fixed portion, allowing for precise rotation of the optical member around multiple axes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional optical member driving mechanisms are used, then the optical member can be driven to rotate, but the device complexity and cost increase

Engineering Contradiction:

Improveoptical member rotation capabilityVSAvoidmechanism structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The driving mechanism is divided into multiple independent driving assemblies (first driving assembly, second driving assembly, etc.), each responsible for driving the movable portion around a specific axis. This segmentation allows each assembly to be simpler in structure while maintaining overall system functionality, reducing the complexity of individual components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Intermediate assemblies are introduced between the driving assemblies and the movable portion to transmit and coordinate the driving forces. These intermediaries (such as linkages or transmission mechanisms) enable the complex rotational movements to be achieved through simpler driving components, reducing the overall device complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If conventional optical member driving mechanisms are used, then the optical member can be driven to rotate, but the manufacturing cost increases

Engineering Contradiction:

Improveoptical member rotation capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

By segmenting the driving mechanism into multiple independent driving assemblies, each assembly can be manufactured separately using standardized processes. This modular approach reduces manufacturing complexity and cost, as each assembly can be produced independently and assembled into the complete system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs resonance frequencies to drive the movable portion, changing the operational parameters from traditional motor-driven continuous rotation to resonance-based periodic excitation. This parameter change allows for simpler, less expensive driving components while maintaining effective optical member rotation capability.

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If sensors are added to detect movement, then the control precision improves, but the device complexity and cost increase

Engineering Contradiction:

Improvemovement detection accuracyVSAvoidsensor system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The movable portion itself serves as the sensing element through its resonant response. By monitoring the resonance characteristics and vibrational states of the movable portion, the system can detect its own position and movement without requiring external sensors. This self-service approach eliminates the need for additional sensor components while maintaining measurement capability.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces traditional mechanical sensor systems with a resonance-based detection method. Instead of using physical sensors to detect position and movement, the system uses the natural resonance frequencies and vibrational characteristics of the movable portion as the sensing mechanism, thereby eliminating complex sensor assemblies.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 enables efficient and precise rotation of optical members, facilitating effective 3D modeling and projection applications without the need for complex and costly sensors, thereby reducing operational costs and improving performance.

Implementation Method 1

a first driving assembly configured to generate a first electromagnetic force

Methodology Applied

Scientific EffectElectromagnetic force: Lorentz Force

Implementation Method 2

a sensing assembly configured to detect the movement of the movable portion relative to the fixed portion

Methodology Applied

Scientific EffectElectromagnetic sensing: Electromagnetic Induction

Data Source

PatentUS12287531B2Optical member driving mechanism

Publication Date: 2025.04.29 ACTUTEK CORP

AI summary

An optical member driving mechanism is provided, including a movable portion, a fixed portion, a first driving assembly, and a first intermediate assembly. The movable portion is configured to connect an optical member, and is movable relative to the fixed portion. The first driving assembly is configured to provide a first driving force to move the movable portion relative to the fixed portion. When the first driving assembly drives the movable portion to move relative to the fixed portion, the movable portion moves relative to the fixed portion via the first intermediate assembly.