Camera Optical Module Layout for AF and OIS Miniaturization
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Solution Overview
Problem
Existing camera module designs struggle to achieve miniaturization while maintaining auto focusing and optical image stabilization functions simultaneously.
Innovation Solution
The optical system incorporates a fixed assembly, optical module, first and second movable assemblies, and driving assemblies with magnetic and coil structures, along with elastic elements and a flexible circuit assembly, allowing the optical module to rotate around the optical axis for image compensation, enabling both auto focusing and optical image stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the camera module is miniaturized, then the size is reduced, but the ability to perform auto focusing and optical image stabilization simultaneously is compromised
Solution Approach 1:
The patent combines auto focusing and optical image stabilization functions into a single integrated driving mechanism. The driving mechanism includes a first driving assembly that can rotate the optical module around the optical axis for image stabilization, and a second driving assembly that moves the optical module along the optical axis for auto focusing. This merging of multiple functions into one compact mechanism resolves the contradiction by enabling multi-functionality without increasing overall size.
Solution Approach 2:
The patent employs a nested structure where the first and second driving assemblies are arranged in an overlapping configuration when viewed perpendicular to the optical axis. The first movable assembly that rotates around the optical axis is nested within the structure of the second driving assembly. This nesting arrangement allows both auto focusing and optical image stabilization mechanisms to coexist in a compact space, enabling miniaturization while maintaining multi-function capability.
2Reliability
If the first movable assembly rotates around the optical axis for image compensation, then optical image stabilization is achieved, but the flexible circuit assembly may be damaged
Solution Approach 1:
The patent uses a flexible circuit assembly that can dynamically bend and deform during the rotation of the first movable assembly. The flexible circuit is designed with appropriate flexibility to accommodate the rotational movement without breaking, while still maintaining electrical connections. This dynamic design allows the circuit assembly to withstand the mechanical stress of rotation, enabling optical image stabilization without damaging the circuitry.
Solution Approach 2:
The patent employs a flexible circuit assembly that acts as a flexible connection medium between the rotating first movable assembly and the fixed assembly. This flexible circuit can bend and flex during rotation, preventing mechanical failure that would occur with rigid connections. The flexible nature of the circuit assembly allows it to accommodate the rotational motion required for image stabilization while maintaining structural integrity and electrical connectivity.
3Volume of moving object
If the driving assemblies are arranged to overlap when viewed perpendicular to the optical axis, then space is saved for miniaturization, but the structural complexity increases
Solution Approach 1:
The patent divides the driving mechanism into distinct segments: a first driving assembly for rotation around the optical axis and a second driving assembly for movement along the optical axis. Each assembly is independently structured with its own movable and fixed components. This segmentation allows the complex multi-functional driving mechanism to be broken down into manageable, modular units that can be arranged in an overlapping configuration, saving space while maintaining functional clarity.
Solution Approach 2:
The patent arranges the first and second driving assemblies in different spatial dimensions. When viewed perpendicular to the optical axis, the assemblies overlap in the radial dimension, saving space. When viewed along the optical axis, the assemblies are separated in the axial dimension, avoiding interference. This multi-dimensional arrangement allows the complex driving mechanism to be compact without requiring intricate three-dimensional interlocking 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 configuration allows for the miniaturization of camera modules while maintaining the functions of auto focusing and optical image stabilization, ensuring effective image compensation and preventing damage to the flexible circuit assembly during rotation.
Implementation Method 1
The first driving assembly is configured to drive the first movable assembly to move relative to the fixed assembly
Implementation Method 2
The second driving assembly is configured to drive the second movable assembly to move relative to the first movable assembly and the fixed assembly
Implementation Method 3
The first movable assembly is movably connected to the fixed assembly via the first elastic element and the second elastic element
Data Source
AI summary
An optical system is provided and includes a fixed assembly, an optical module, a first movable assembly and a first driving assembly. The optical module has an optical axis. The first movable assembly is configured to be connected to the optical module. The first driving assembly is configured to drive the first movable assembly to move relative to the fixed assembly, and a gap is formed between the first movable assembly and the fixed assembly.