Camera Lens Holder Positioning to Eliminate Case Collision Noise

Solution Overview

Problem

Noise is generated during the movement of components in portable electronic devices due to collisions between the camera lens holder and other elements, which affects the acoustic performance of sound generation.

Innovation Solution

A method is introduced where the camera lens holder is moved to a predetermined position farther away from the case when the sound generator is active, using controlling current to the lens coil to prevent collisions and thus eliminate noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the camera lens holder is suspended by an elastic spring to enable Auto Focus/Anti-shaking functions, then the camera lens can capture clear images, but the lens holder may collide with adjacent elements during sound generation, producing noise

Engineering Contradiction:

Improveimage capture qualityVSAvoidnoise interference

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The lens holder is pre-positioned at a predetermined location that is farther away from the case before sound generation occurs. This preliminary positioning prevents collision during subsequent sound generation operations, eliminating noise while preserving Auto Focus functionality

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The lens holder position is dynamically adjusted based on operational mode. During sound generation, the lens holder is positioned at a predetermined location to avoid collision. During Auto Focus operations, the lens holder can move freely to capture clear images

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the lens holder is positioned closer to the case to maximize Auto Focus range, then image capture capability is improved, but collision with the case occurs during sound generation, producing noise

Engineering Contradiction:

ImproveAuto Focus rangeVSAvoidcollision noise

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The lens holder is pre-positioned at a predetermined location that maintains optimal Auto Focus range while being sufficiently distant from the case to prevent collision during sound generation

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The lens holder position is dynamically adjusted based on operational mode. During sound generation, the lens holder is positioned at a predetermined location to avoid collision. During Auto Focus operations, the lens holder can move freely to capture clear images

Inventive Principle:

Principle #15Dynamics

3Object-affected harmful factors

If the lens holder is fixed in position to prevent collision noise, then noise interference is eliminated, but the camera lens loses Auto Focus capability

Engineering Contradiction:

Improvenoise interferenceVSAvoidimage capture quality

Core Design Contradiction:

Object-affected harmful factorsVSMeasurement precision

Solution Approach 1:

The lens holder position is dynamically adjusted based on operational mode. During sound generation, the lens holder is positioned at a predetermined location to avoid collision. During Auto Focus operations, the lens holder can move freely to capture clear images

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The lens holder is pre-positioned at a predetermined location that is farther away from the case before sound generation occurs. This preliminary positioning prevents collision during subsequent sound generation operations, eliminating noise while preserving Auto Focus functionality

Inventive Principle:

Principle #10Preliminary action

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

This method effectively reduces noise interference, enhancing the acoustic performance of the sound generator by avoiding collisions between the lens holder and the case during sound production.

Implementation Method 1

the position of the lens holder can be adjusted due to the force generated by the magnetic circuit system

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

providing controlling current to the lens coil of the camera lens

Methodology Applied

Scientific EffectLorentz force: Lorentz Force

Data Source

PatentUS11143934B2Method for eliminating noise and portable electronic device using same

Publication Date: 2021.10.12 AAC TECHNOLOGIES PTE LTD

AI summary

The present application discloses a portable electronic device. The device includes a case; a camera lens fixed to the case; a sound generator attached to the case for producing sounds; and a central process unit and a circuit system for providing controlling current to the camera lens. The camera lens includes a side wall and a lens holder moveable relative to the side wall. The lens holder is driven to a predetermined position farther away from the case than an initial position, when the sound generator is producing sounds. The present application further provides a method for eliminating noise by applying controlling current to the lens holder to move the lens holder to a position farther away from the case for avoiding collision between the case and the lens holder.