Optical Element Driving Mechanism for Miniaturized Camera Modules
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Solution Overview
Problem
Existing camera module driving mechanisms fail to achieve miniaturization while maintaining auto-focusing and optical image stabilization functions, making them unsuitable for modern electronic devices that require reduced component size.
Innovation Solution
An optical element driving mechanism comprising a fixed assembly, a movable assembly, and a connecting assembly, where the movable assembly is connected to the fixed assembly through a first elastic unit with a block structure and a driving assembly using magnetic elements and coils, allowing for movement along the optical axis while reducing height and stabilizing the lens holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional driving mechanisms are used in camera modules, then auto-focusing and optical image stabilization functions can be achieved, but the component size cannot be reduced sufficiently for miniaturization
Solution Approach 1:
The camera module is divided into distinct assemblies: a fixed assembly containing the driving mechanism, and a movable assembly containing the lens holder. This segmentation allows the driving mechanism to be optimized for function while the overall module size is reduced through compact arrangement of separate functional units.
Solution Approach 2:
The movable assembly is positioned within the accommodating space of the fixed assembly, creating a nested configuration. The lens holder and optical elements are housed within the movable assembly, which in turn is contained within the overall camera module structure, achieving compact integration and miniaturization.
2Length of moving object
If the camera module is miniaturized to fit modern electronic devices, then device integration is improved, but the driving mechanism becomes more difficult to implement with sufficient stability
Solution Approach 1:
The first elastic unit is positioned at specific locations (corners) of the movable assembly to provide localized support and stability. This strategic placement of elastic elements at critical positions maintains lens holder stability while allowing overall miniaturization of the camera module structure.
Solution Approach 2:
The first elastic unit is constructed from plastic material with light-curing or heat-curing glue, creating a composite structure that combines flexibility and elasticity. This composite material approach enables the elastic unit to provide stable support in a compact form factor, achieving both miniaturization and stability.
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 mechanism effectively miniaturizes the camera module by reducing the Z-axis height and enhancing stability, enabling it to be integrated into smaller electronic devices while maintaining auto-focusing and optical image stabilization capabilities.
Implementation Method 1
The connecting assembly includes a first elastic unit having a block structure; the first elastic unit does not have a plate-shaped structure; the first elastic unit has a plastic material; the first elastic unit includes a light-curing glue or a heat-curing glue.
Implementation Method 2
the driving assembly includes two magnetic elements disposed on opposite sides of the fixed assembly; a third pair of the first elastic elements are disposed between the two magnetic elements and the movable assembly
Data Source
AI summary
An optical element driving mechanism is provided and includes a fixed assembly, a movable assembly and a connecting assembly. The movable assembly is configured to connect an optical element having an optical axis, and the movable assembly is movable relative to the fixed assembly. The movable assembly is movably connected to the fixed assembly through the connecting assembly.