Optical Element Drive Structure for Compact AF and OIS Modules
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Solution Overview
Problem
Existing camera module driving mechanisms struggle to achieve autofocus, optical image stabilization, and miniaturization simultaneously.
Innovation Solution
An optical element driving mechanism with a fixed assembly, movable assembly, driving assembly, and circuit assembly, featuring a positioning structure and spring sheets for stable circuit attachment, allowing for miniaturization while maintaining functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the camera module components are reduced to achieve miniaturization, then the size of the camera module is reduced, but the functionality for autofocus and optical image stabilization deteriorates
Solution Approach 1:
The patent combines the autofocus driving mechanism and optical image stabilization driving mechanism into a single integrated structure. The movable assembly includes both a first driving mechanism for autofocus (moving the optical element along the optical axis) and a second driving mechanism for optical image stabilization (moving the movable assembly relative to the fixed assembly), allowing both functions to coexist in a compact form factor.
Solution Approach 2:
The movable assembly serves multiple functions: it holds the optical element, provides autofocus capability through the first driving mechanism, and provides optical image stabilization capability through the second driving mechanism. This multi-functional design allows the camera module to maintain comprehensive functionality while reducing overall size.
2Device complexity
If the circuit assembly is positioned without a positioning structure, then the device complexity is reduced, but the manufacturing precision and assembly accuracy deteriorate
Solution Approach 1:
The positioning structure is pre-formed as an integral part of the fixed assembly, with positioning protrusions and positioning grooves designed in advance to guide the circuit assembly into its correct position. This preliminary preparation of positioning features ensures accurate assembly without requiring complex real-time adjustment mechanisms.
3Ease of manufacture
If the circuit assembly is attached without stable positioning, then the ease of manufacture is improved, but the reliability of the circuit connection deteriorates
Solution Approach 1:
The positioning structure with protrusions and grooves is pre-designed and formed during manufacturing of the fixed assembly, establishing precise alignment features before the circuit assembly is attached. This preliminary preparation ensures that the circuit assembly connects reliably without requiring complex alignment procedures during assembly.
Data Source
AI summary
An optical element driving mechanism is provided and includes a fixed assembly, a movable assembly, a driving assembly and a circuit assembly. The movable assembly is configured to connect an optical element, the movable assembly is movable relative to the fixed assembly, and the optical element has an optical axis. The driving assembly is configured to drive the movable assembly to move relative to the fixed assembly. The circuit assembly includes a plurality of circuits and is affixed to the fixed assembly.