Camera Module Damping Member Oscillation Control

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Solution Overview

Problem

Camera modules with hand shake correction units experience resolution deterioration due to oscillation phenomena caused by the driving of the lens unit, which also degrades the durability of the lens unit and overall module from external forces.

Innovation Solution

A camera module design incorporating a damping member, such as a silicone-based rubber component or viscous fluid, between the housing and lens unit to reduce movement and oscillation, combined with an actuator and support member for hand shake correction, and a polyhedral housing shape with accommodating grooves for the damping member.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a hand shake correction unit drives the lens unit to correct camera shake, then camera shake is corrected, but oscillation and fine vibrations occur in the lens unit which degrades resolution

Engineering Contradiction:

Improvecamera shake correctionVSAvoidimage resolution

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

A damping member is introduced as an intermediary element between the lens unit and the housing. This damping member absorbs and dissipates the oscillation and vibrations generated during hand shake correction, preventing these vibrations from affecting the image sensor and thereby maintaining image resolution while preserving camera shake correction functionality.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the lens unit is driven for hand shake correction, then camera shake is corrected, but the lens unit and module become more susceptible to external forces

Engineering Contradiction:

Improvecamera shake correctionVSAvoidresistance to external forces

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The damping member is pre-installed between the lens unit and housing to provide cushioning against external forces. This beforehand cushioning protects the lens unit and module from impacts or vibrations from external sources, enhancing overall strength and durability while allowing the hand shake correction function to operate effectively.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 damping member effectively suppresses oscillation and vibration, improving image focus and resolution by minimizing the impact of hand shake and external forces, thus enhancing the durability and performance of the camera module.

Implementation Method 1

a damping member disposed between the housing and the lens unit to thereby reduce the movement of the lens unit through the hand shake correction unit

Methodology Applied

Scientific EffectViscous damping: Viscous Damping

Implementation Method 2

The damping member may be formed of a mixed material, including a silicone-based rubber component

Methodology Applied

Scientific EffectViscoelasticity: Viscoelasticity

Data Source

PatentUS8965189B2Camera module

Publication Date: 2015.02.24 SAMSUNG ELECTRO MECHANICS CO LTD

AI summary

There is provided a camera module including: a housing; a lens unit mounted in the housing; a hand shake correction unit correcting a movement of the lens unit with respect to the housing; and a damping member disposed between the housing and the lens unit to thereby reduce the movement of the lens unit through the hand shake correction unit.