OIS Camera Module Guide Ball Layout to Prevent Lens Rotation
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Solution Overview
Problem
Existing camera modules with optical image stabilization (OIS) functions require a separate guide member to stabilize the movement of lens assemblies or image sensors, which increases the device's volume and thickness, and can lead to unintended rotations that deteriorate image resolution.
Innovation Solution
A camera module design that stabilizes the directionality of movement using a guide ball and guide plates with dipole magnets and ferromagnets, eliminating the need for a separate guide member by allowing the guide ball to move along a neutral zone between the poles, thus preventing unintended rotations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a separate guide member is added to stabilize the directionality of movement, then the stability of movement direction is improved, but the volume and thickness of the device increase
Solution Approach 1:
The guide member is integrated into the carrier structure by forming guide grooves directly on the carrier surface. This merging of functions allows the carrier to simultaneously support the lens assembly and provide directional guidance, eliminating the need for separate guide members and reducing overall device volume and thickness.
Solution Approach 2:
The carrier is designed with multi-functionality, serving both as a mounting platform for the lens assembly and as a guide structure through integrated grooves. This universal design allows a single component to perform multiple functions, avoiding the addition of extra parts that would increase device thickness.
2Stability of the object's composition
If a separate guide member is added to stabilize the directionality of movement, then the stability of movement direction is improved, but unintended rotation or tilt may still occur
Solution Approach 1:
Spherical guide balls are used within the guide grooves to constrain movement. The spherical shape of the guide balls, combined with the groove geometry, ensures that the lens assembly moves only along the intended linear path while preventing any rotation or tilt, as the sphere can only roll along the groove trajectory without rotational freedom.
3Reliability
If the lens assembly or image sensor moves only in a specific direction, then stable OIS is achieved, but the structure becomes more complex with additional constraints
Solution Approach 1:
The guidance function is segmented into multiple guide grooves positioned at different locations on the carrier. These distributed grooves work together to constrain the lens assembly's movement, providing stable OIS performance through a modular approach that avoids overly complex monolithic structures.
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 design maintains image stabilization without increasing the device's thickness and prevents unintended rotations, enhancing the camera's ability to capture clear images while maintaining a compact form factor.
Implementation Method 1
The at least one first guide plate may include a dipole magnet, and each of the at least one second guide plate and the guide ball may include a ferromagnet
Data Source
AI summary
An electronic device includes a lens assembly aligned along an optical axis; a first carrier coupled to the lens assembly and having a first accommodating groove therein; a second carrier coupled to the first carrier and having a second accommodating groove therein; at least one first guide plate coupled to the first accommodating groove in the first carrier, the at least one first guide plate having a first surface; at least one second guide plate coupled to the second accommodating groove in the second carrier, the at least one second guide plate having a second surface that faces the first surface of the at least one first guide plate; and a guide ball on the second surface and accommodated in at least part of a space formed by the second carrier, the guide ball contacting the first surface.