Compact Camera Optical Module with Nested Aperture and OIS Drive
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Solution Overview
Problem
Existing camera module designs struggle to achieve miniaturization while maintaining functions such as auto-focus, optical image stabilization, and adjustable aperture.
Innovation Solution
The optical system incorporates a first optical element driving mechanism with a movable assembly and driving assembly to adjust the aperture, and a second optical element driving mechanism with a movable assembly and driving assembly to achieve auto-focusing and optical image stabilization, all while maintaining a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple driving mechanisms are integrated into a compact space to achieve miniaturization, then the device size is reduced, but the structural complexity and difficulty of positioning increase
Solution Approach 1:
The patent combines multiple driving mechanisms (first and second optical element driving mechanisms) into a single integrated structure where they share common components such as the circuit assembly, casing, and accommodation space. This merging approach reduces the overall volume of the camera module while distributing the functional complexity across shared structural elements, thereby resolving the contradiction between miniaturization and structural complexity.
Solution Approach 2:
The first optical element driving mechanism is nested within the second optical element driving mechanism, with the first mechanism positioned inside the accommodation space of the second mechanism. This nesting arrangement allows both mechanisms to coexist in a compact configuration, reducing the total volume occupied by multiple separate mechanisms while maintaining their individual functional integrity.
2Volume of moving object
If multiple driving mechanisms are integrated into a compact space to achieve miniaturization, then the device size is reduced, but the positioning precision deteriorates
Solution Approach 1:
The patent implements separate, dedicated position sensing elements (first position sensing element for the first optical element, second position sensing element for the second optical element) that are locally optimized for their respective sensing tasks. Each sensing element is positioned and configured to detect the specific optical element's position with high precision, ensuring that local measurement quality is maintained even though the overall device volume is reduced through integration.
3Measurement precision
If separate driving mechanisms are used for each optical element, then the positioning accuracy is maintained, but the device volume increases
Solution Approach 1:
The patent merges the circuit assemblies of both driving mechanisms into a single shared circuit assembly that contains both the first circuit element (connected to the first driving assembly) and the second circuit element (connected to the second driving assembly). This sharing of the circuit assembly reduces the overall volume required for electrical components while maintaining separate control pathways that preserve the positioning accuracy of each optical element.
Data Source
AI summary
An optical system is provided and includes a first optical element driving mechanism, which includes a first fixed assembly, a first movable assembly, and a first driving assembly. The first movable assembly is configured to be connected to a first optical element, and the first movable assembly is movable relative to the first fixed assembly. The first movable assembly includes a first movable element and a second movable element. The first driving assembly is configured to drive the first movable assembly to move relative to the first fixed assembly. The first fixed assembly and the first movable assembly are arranged along a main axis, and the first driving assembly is configured to drive the second movable element to move along a first axis, thereby driving the first movable element to move around the main axis.