Optical Element Holder With Dual-Axis Pivot for Thin Long-Focal Modules
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Solution Overview
Problem
The challenge is to design an optical element driving mechanism that allows for the miniaturization of electronic devices equipped with long focal length optical elements, without increasing the device's thickness.
Innovation Solution
The proposed optical element driving mechanism includes a fixed part, a movable part, and a driving assembly. The movable part has a holder and a supporting element, which uses the supporting element as a fulcrum to move relative to the fixed part around two non-parallel axes. This mechanism also incorporates a piezoelectric assembly for precise movement control and a sensing assembly for movement sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a long focal length optical element is provided in an electronic device, then the optical performance is improved, but the thickness of the electronic device is increased
Solution Approach 1:
The patent employs a movable optical element that can dynamically adjust its position and orientation relative to the sensor. This dynamic capability allows the system to achieve long focal length optical performance while maintaining a compact form factor, as the optical element can move to different positions rather than requiring a fixed long optical path
Solution Approach 2:
The patent utilizes multi-axis movement mechanisms that allow the optical element to move not only along the optical axis but also in lateral dimensions and rotation. This dimensional expansion enables the system to achieve equivalent optical effects of long focal length through positional adjustments rather than increasing the optical path length directly
2Length of stationary object
If the optical element is made movable to improve miniaturization, then the device thickness is reduced, but the structural complexity is increased
Solution Approach 1:
The patent integrates multiple functions into the movable optical element structure, combining positioning, orientation control, and optical adjustment in a single integrated mechanism. This merging reduces the number of separate components and simplifies the overall structure while maintaining the capability for miniaturization
Solution Approach 2:
The movable optical element is designed to perform multiple functions: adjusting focal length, changing field of view, and adapting to different shooting scenarios. This multi-functionality eliminates the need for separate mechanisms for each function, thereby reducing structural complexity while achieving miniaturization goals
3Measurement precision
If precise movement control is implemented, then the motion accuracy is improved, but the device complexity is increased
Solution Approach 1:
The patent incorporates sensing assemblies that detect the position and orientation of the movable optical element in real-time and provide feedback to the control system. This feedback mechanism enables precise movement control through closed-loop control, achieving high motion accuracy while keeping the control system manageable through intelligent algorithms
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 solution enables the miniaturization of electronic devices by efficiently moving optical elements without increasing the device's thickness, while also improving stability and motion efficiency.
Implementation Method 1
The piezoelectric assembly includes a piezoelectric-assembly metal-plate, and a plurality of piezoelectric elements. The piezoelectric elements are disposed on the piezoelectric-assembly metal-plate.
Implementation Method 2
The magnetic conductivity of the elastic assembly is lower than the magnetic conductivity of the fixed part magnetic conductive element.
Data Source
AI summary
An optical element driving mechanism is provided, including a fixed part, a movable part, and a driving assembly. The movable part includes a holder, and a supporting element. The holder holds an optical element. The supporting element is connected to the holder. The driving assembly drives the movable part to move relative to the fixed part. The holder uses the supporting element as a fulcrum and moves relative to the fixed part around the first axis and the second axis. The first axis is not parallel to the second axis.