Camera Module Drive Assembly Without Magnetic Interference

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Solution Overview

Problem

Magnetic fields generated by conventional magnetoelectric drive structures in camera modules interfere with surrounding electronic devices, affecting their performance.

Innovation Solution

A drive apparatus utilizing an electrically driven assembly, such as an ion conduction polymer metal composite (IPMC), which deforms to move a carrier and function device without generating magnetic interference, allowing for precise control of optical and acoustic adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a related art driving apparatus is used, then the structure is simple, but the lens cannot be driven accurately along the optical axis due to eccentricity and runout

Engineering Contradiction:

Improvelens driving accuracyVSAvoiddriving apparatus structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The driving apparatus is divided into multiple independent components: a first driving member that rotates the lens barrel, and a second driving member that independently adjusts the lens position. This segmentation allows each component to perform a specific function, reducing the impact of eccentricity and runout on overall driving accuracy.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A support member is introduced as an intermediary component between the first and second driving members. The support member receives rotational driving force from the first driving member and transmits it to the second driving member, enabling precise positional adjustment while isolating the system from eccentricity and runout effects.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the lens position is adjusted frequently, then focus accuracy is maintained, but wear and tear on the driving apparatus increases

Engineering Contradiction:

Improvefocus accuracyVSAvoiddriving apparatus lifespan

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent replaces traditional mechanical continuous adjustment mechanisms with a discrete positioning system using the support member and second driving member. This substitution reduces mechanical wear by enabling precise positioning with fewer adjustments, thereby extending the driving apparatus lifespan while maintaining focus accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Manufacturing precision

If the lens barrel has large runout, then manufacturing is easier, but the lens cannot be driven accurately along the optical axis

Engineering Contradiction:

Improvelens driving accuracyVSAvoidlens barrel manufacturing

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The support member extracts and isolates the runout issue from the lens driving system. By receiving rotational driving force from the first driving member and transmitting it to the second driving member, the support member prevents runout from being directly transmitted to the lens, allowing manufacturing with relaxed tolerances while maintaining driving accuracy.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP4167559B1Driving apparatus, camera module, and electronic device

Publication Date: 2026.05.06 VIVO MOBILE COMM CO LTD

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AI summary

A drive apparatus, a camera module, and an electric device are provided. A fixed assembly, a carrier, and an electrically drive assembly are included. A first end of the electrically drive assembly is connected to the fixed assembly, and a second end of the electrically drive assembly is connected to the carrier; and the carrier is used for carrying a function device; where in a case of applying a voltage to the electrically drive assembly, the electrically drive assembly deforms to drive the carrier to move.