Camera Module Magnetic Field Positioning Control

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Solution Overview

Problem

The structural complexity of pop-up camera modules in electronic devices increases due to mechanical control mechanisms, which complicates the pop-up and reset functions and affects the accuracy and effectiveness of the camera's use.

Innovation Solution

A camera module with a spatial magnetic field sensing member and magnetic members that generate a preset magnetic field around the lens assembly, allowing for accurate positioning and reduced structural complexity by sensing magnetic field changes in three directions, thereby improving locating accuracy and reducing space occupancy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If mechanical control mechanisms are used to achieve pop-up and reset functions, then the camera module can be controlled to pop out and reset, but the structural complexity increases

Engineering Contradiction:

Improvepop-up and reset function controlVSAvoidstructural complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces the traditional mechanical control mechanism with a magnetic field-based control system. The magnetic member generates a magnetic field that interacts with the spatial magnetic field sensing member to control the lens assembly's movement, eliminating the need for complex mechanical switches, buttons, or levers while achieving the same pop-up and reset functions.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a magnetic field as an intermediary between the control system and the lens assembly. The magnetic member generates the magnetic field, which acts as a mediator to transmit control signals to the lens assembly without direct mechanical contact, thereby simplifying the overall structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If mechanical control mechanisms are used for pop-up and reset functions, then the camera can be controlled, but the accuracy and effectiveness of camera use is affected

Engineering Contradiction:

Improvecamera control functionalityVSAvoidpositioning accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent implements a feedback mechanism where the spatial magnetic field sensing member continuously detects the magnetic field generated by the magnetic member and provides position information back to the control system. This closed-loop feedback enables precise control and accurate positioning of the lens assembly, improving both accuracy and effectiveness of camera use.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The magnetic field-based sensing system provides non-contact, high-precision detection of the lens assembly's position, replacing less accurate mechanical position detection methods and enabling more accurate positioning control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If traditional positioning methods are used, then the camera module can function, but the space occupancy is increased

Engineering Contradiction:

Improvecamera module functionalityVSAvoidspace occupancy

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent replaces traditional mechanical positioning components (such as mechanical stops, guides, or larger motor systems) with a compact magnetic field-based positioning system. The magnetic field is invisible and occupies no physical space, allowing for a more compact camera module design while maintaining full functionality.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic member serves multiple functions: it generates the magnetic field for positioning detection, acts as part of the drive mechanism, and provides reference markers for the sensing system. This multi-functionality reduces the need for separate components, thereby reducing overall space occupancy.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 solution simplifies the structural complexity of the camera module, enhances the accuracy of the camera's positioning, and reduces the space it occupies within the electronic device, improving the overall use experience by ensuring accurate pop-up and reset functions.

Implementation Method 1

a spatial magnetic field sensing member (111) disposed on the circuit board (112), and at least one magnetic member (13) assembled to the lens assembly (12) to generate a preset magnetic field around the lens assembly (12)

Methodology Applied

Scientific EffectMagnetic field sensing: Magnetic Field

Data Source

PatentEP3654631B1Camera module and electronic device

Publication Date: 2021.10.20 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

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AI summary

A camera module (1) includes: a control body (11), a lens assembly (12) and at least one magnetic member (13). The control body (11) includes a circuit board and a spatial magnetic field sensing member disposed on the circuit board. The lens assembly (12) is configured to be controlled to move, so as to generate relative displacement between the lens assembly (12) and the spatial magnetic field sensing member. The at least one magnetic member (13) is assembled to the lens assembly (12) to generate a preset magnetic field around the lens assembly (12). Along with a movement of the lens assembly (12), the spatial magnetic field sensing member senses changes of the preset magnetic field.