Camera Module Damper Structure for Stable OIS Under Shock
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Solution Overview
Problem
Existing camera modules in mobile devices experience degraded optical image stabilization (OIS) quality due to external disturbances, such as shocks, which hinder smooth movement of the lens or sensor, leading to impaired image clarity.
Innovation Solution
Incorporation of a damper structure with damping gel and damping pins in the camera module to mitigate vibrations caused by external disturbances, allowing smooth movement of lens components by using viscoelastic materials and orthogonal movement mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lens or sensor is moved to compensate for shaking during OIS driving, then image clarity is improved, but the lens becomes vulnerable to external disturbances such as shocks that degrade OIS quality
Solution Approach 1:
The patent introduces a damping structure with damping gel and damping pins that are pre-installed in the movement path of the lens. This cushioning mechanism is positioned beforehand to absorb external shocks and vibrations before they can disrupt the lens movement, thereby maintaining OIS quality even when the lens is actively moving for image stabilization.
Solution Approach 2:
The damping gel acts as an intermediary substance between the lens and the external environment. It mediates the transmission of external disturbances by absorbing and dissipating shock energy, allowing the lens to move smoothly for OIS compensation while being protected from harmful external forces.
2Stability of the object's composition
If external shocks occur during lens movement for OIS, then the lens movement becomes unstable, but adding damping structures increases device complexity
Solution Approach 1:
The patent employs a damping gel, which is a flexible viscoelastic material, to provide shock absorption. This flexible damping medium is integrated into the existing lens assembly structure through damping pins, achieving stable lens movement without requiring rigid or complex mechanical damping structures.
Solution Approach 2:
The damping structure combines the damping gel (viscoelastic material) with the rigid damping pins and housing structure. This composite approach leverages the shock-absorbing properties of the gel and the structural support of the pins to achieve effective vibration damping while maintaining a relatively simple overall design.
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
Enhances OIS performance by damping unnecessary vibrations, ensuring stable and clear image capture even under external disturbances.
Implementation Method 1
a damping gel disposed on one surface of surfaces of the first moving body and the second moving body opposing each other... the damping pin having a portion insertable into the damping gel
Data Source
AI summary
A camera module include a first moving body, disposed in a housing, configured to move in an optical axis direction; a guide member having one surface disposed to oppose the first moving body, the guide member coupled to the first moving body and configured to move in a direction orthogonal to an optical axis; a second moving body disposed to oppose another surface of the guide member, the second moving body coupled to the guide member and configured to move in the direction orthogonal to the optical axis; a gel accommodating portion formed on one surface of surfaces of the first moving body, the second moving body, and the guide member opposing each other, the gel accommodating portion configured to accommodate a damping gel; and a damping pin configured to protrude from a position oppose the gel accommodating portion, the damping pin having a portion insertable into the damping gel.