Camera Module Suspension Structure for Stable OIS Lens Positioning
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Solution Overview
Problem
Camera module suspension wires are prone to deformation due to external impact and difficulty in preventing lens module rotation during image stabilization, affecting the stability and functionality of the camera module.
Innovation Solution
A camera module design incorporating a housing, carrier, ball member, lens module, elastic unit, and driving unit with magnet and coil units, along with signal patterns and position sensors, to enhance stability and prevent lens module rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If suspension wires are used to support lens module movement during shake correction, then the lens module can be moved for image stabilization, but the suspension wires are deformed due to external impact
Solution Approach 1:
The suspension system is divided into multiple elastic members (first elastic member and second elastic member) that connect different parts of the lens module to the carrier. Each elastic member independently supports specific portions, distributing the impact forces and preventing deformation of any single support element.
Solution Approach 2:
The patent changes the physical properties of the suspension system by using elastic members with specific elastic coefficients and structural configurations. The elastic members can deform elastically under external impact, absorbing shock forces while maintaining support functionality, thus preventing permanent deformation.
2Reliability
If suspension wires are used to support lens module movement, then the lens module can be moved for shake correction, but the lens module rotates due to variation in driving force
Solution Approach 1:
The support system is segmented into multiple elastic members positioned at different locations (upper and lower portions) of the lens module. This segmented arrangement provides distributed support that resists rotational moments, preventing the lens module from rotating during image stabilization even when driving force varies.
3Use of energy by moving object
If multiple suspension wires are used to supply power to image stabilization coil, then power can be delivered, but the wires are vulnerable to deformation
Solution Approach 1:
The patent changes the physical state and properties of the power supply elements by using elastic members with integrated conductive properties. These elastic members can stretch and deform elastically while maintaining electrical connectivity, making them resistant to permanent deformation from external impacts while continuing to supply power to the image stabilization coil.
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 design improves optical image stabilization and focus adjustment by providing robust support and precise movement control of the lens module, enhancing camera performance.
Implementation Method 1
an elastic unit connected to the carrier and the lens module
Implementation Method 2
the driving unit includes a magnet unit disposed on the carrier, a first coil unit disposed in the lens module, and a second coil unit disposed in the housing
Implementation Method 3
a ball member disposed between the housing and the carrier
Data Source
AI summary
A camera module includes a housing having an internal space, a carrier accommodated in the housing and being movable relative to the housing in a direction perpendicular to an optical axis, a ball member disposed between the housing and the carrier, a lens module accommodated in the carrier and movable in an optical axis direction relative to the carrier, an elastic unit connected to the carrier and the lens module, and a driving unit providing driving force to the lens module and the carrier, wherein the driving unit includes a magnet unit disposed on the carrier, a first coil unit disposed in the lens module, and a second coil unit disposed in the housing, and a first signal pattern is disposed in the housing, and the first signal pattern is electrically connected to the elastic unit.