Camera Module Ball-Guided Lens Drive for Autofocus and Stabilization
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Solution Overview
Problem
Conventional optical systems face challenges in miniaturization, high image quality, and three-dimensional movement, particularly in auto-focus and optical image stabilization, failing to meet the requirements of modern electronic and vehicle devices.
Innovation Solution
A camera module with a driving device comprising a lens carrier, magnet carrier, and ball groups in specific groove configurations, allowing for three-dimensional movement and precise control of the imaging lens assembly, integrated with auto-focus and image-stabilization magnets and coils for enhanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional optical systems are used with auto-focus and optical image stabilization functions, then the functionality requirements are met, but the system size becomes large and cannot be miniaturized
Solution Approach 1:
The patent combines the auto-focus mechanism and optical image stabilization mechanism into a single integrated optical system. The lens assembly can simultaneously perform focusing along the optical axis and stabilization movements perpendicular to the optical axis, merging two separate functions into one unified structure, thereby reducing overall system size while maintaining full functionality
Solution Approach 2:
The optical system is designed with multi-functionality, where the same lens assembly and support structure perform both auto-focus (along optical axis) and optical image stabilization (perpendicular to optical axis). This universal design allows a single component to execute multiple functions, eliminating the need for separate mechanisms and achieving miniaturization
2Manufacturing precision
If conventional optical systems are used, then the basic imaging function is provided, but the lens driving accuracy in three-dimension is poor
Solution Approach 1:
The patent employs dynamic drive mechanisms that can independently control the lens assembly's movement along the optical axis (for focusing) and perpendicular to the optical axis (for stabilization). The system uses dynamic adjustment of driving forces in different directions, allowing precise three-dimensional lens positioning through coordinated control of multiple driving elements
Solution Approach 2:
The patent introduces an intermediary support structure that mediates between the driving mechanisms and the lens assembly. This intermediate structure translates and coordinates the driving forces from different directions, enabling precise three-dimensional lens positioning while simplifying the overall control system through a centralized mediation mechanism
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 solution provides high-precision, miniaturized optical systems with improved lens driving accuracy, enabling auto-focus and image stabilization, and simplifies assembly processes while maintaining high image quality and freedom of movement.
Implementation Method 1
The first ball group is disposed in the first groove group. The second ball group is disposed in the second groove group. One of the fixed component and the lens carrier has a third groove group, and another one of the fixed component and the lens carrier has a fourth groove group. The second ball group is disposed in the third groove group, and the imaging lens assembly is movable with respect to the fixed component on a plane defined by the third direction and the second direction via the second ball group
Implementation Method 2
The magnet carrier has a first groove group and a second groove group. The first groove group extends along a first direction parallel to the optical axis, and the second groove group extends along a second direction perpendicular to the optical axis
Data Source
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AI summary
A camera module (1) includes an imaging lens assembly (12) having an optical axis (121) and a driving device (13) including a fixed component (131), a lens carrier (132), a magnet carrier (133), a first ball group (134), and a second ball group (135). The imaging lens assembly (12) is disposed in the lens carrier (132). The magnet carrier (133) has a first groove group (1331) extending parallel to the optical axis (121) and a second groove group (1332) extending perpendicular to the optical axis (121). One of the fixed component (131) and the lens carrier (132) has a third groove group (1321) disposed opposite to the second groove group (1332). The imaging lens assembly (12) is movable with respect to the fixed component (131) on a plane perpendicular to the optical axis (121) via the second ball group (135) disposed between the second groove group (1332) and the third groove group (1321) and along a direction parallel to the optical axis (121) through the first ball group (134) disposed in the first groove group (1331).