Camera Module Ball-Groove Actuation for 3D Lens Motion
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Solution Overview
Problem
Conventional optical systems face challenges in meeting the requirements of miniaturization, high image quality, and three-dimensional freedom of movement, particularly in electronic devices and vehicle devices, due to poor lens driving accuracy.
Innovation Solution
A camera module design incorporating an imaging lens assembly and a driving device with specific groove configurations and ball groups allows for translational motion in three-dimensional space, enabling auto focus and image stabilization, while simplifying assembly and enhancing control precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional optical systems are used, then the structure is simple, but the lens driving accuracy in three-dimension is poor
Solution Approach 1:
The driving device is segmented into multiple independent driving units, each responsible for driving the lens assembly in a specific direction. Each driving unit includes a driving component and a corresponding ball group, allowing precise control of lens movement in three-dimensional space through coordinated operation of these segmented units.
Solution Approach 2:
Ball groups serve as intermediary elements between the driving components and the lens assembly. The balls transmit the driving forces from the driving components to the lens assembly, enabling precise translational motion while isolating the complex driving mechanism from the optical components.
2Volume of moving object
If the device size is reduced for miniaturization, then the device becomes compact, but the lens driving capability in three-dimension is compromised
Solution Approach 1:
The driving components and ball groups are nested within the compact housing structure, with multiple driving units arranged in a space-efficient configuration. The lens assembly is positioned centrally, allowing all driving mechanisms to operate within a confined volume while maintaining full three-dimensional movement capability.
3Adaptability or versatility
If multiple driving components are added for three-dimensional movement, then the lens driving capability is improved, but the assembly complexity increases
Solution Approach 1:
Each driving unit is designed as a universal module that can drive the lens assembly in its designated direction while using the same basic component architecture. The standardized design of driving components and ball groups across different units simplifies manufacturing and assembly, as the same parts can be reused and the same assembly procedures apply to all driving units.
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 provides improved lens driving accuracy, enabling miniaturization and high image quality with enhanced auto-focusing and image stabilization capabilities, suitable for electronic devices and vehicle devices.
Implementation Method 1
each of the third groove group and the second groove group is in physical contact with the second ball group
Data Source
AI summary
A camera module includes an imaging lens assembly having an optical axis and a driving device including a fixed component, a lens carrier, a magnet carrier, a first ball group, and a second ball group. The imaging lens assembly is disposed in the lens carrier. The magnet carrier has a first groove group extending parallel to the optical axis and a second groove group extending perpendicular to the optical axis. One of the fixed component and the lens carrier has a third groove group disposed opposite to the second groove group. The imaging lens assembly is movable with respect to the fixed component on a plane perpendicular to the optical axis via the second ball group disposed between the second groove group and the third groove group and along a direction parallel to the optical axis through the first ball group disposed in the first groove group.