Optical Device Rotation Mechanism Eliminates Motor Interference
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Solution Overview
Problem
Conventional camera modules in portable electronic devices face image quality issues due to electromagnetic interference from motor mechanisms used in optical image stabilization, leading to blurry images, especially in low-light conditions.
Innovation Solution
An optical device that employs a rotation mechanism with bias wires and elastic elements to adjust the position of optical elements for image stabilization, eliminating the need for motor mechanisms and thereby reducing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a motor mechanism is used for optical image stabilization, then image stabilization function is achieved, but electromagnetic field interference occurs affecting lens control
Solution Approach 1:
The patent extracts and removes the motor mechanism from the optical image stabilization system, replacing it with a magnetic field-free mechanism that uses a movable reflective element mounted on a rotatable carrier. This eliminates the electromagnetic field interference while preserving the image stabilization function through mechanical rotation of the carrier instead of motor-driven actuation.
Solution Approach 2:
The patent replaces the motor mechanism with a purely mechanical rotation system where a carrier can rotate about a vertical axis to change the orientation of the reflective element. This mechanical substitution eliminates electromagnetic fields while achieving the same image stabilization effect through physical repositioning of the optical element.
2Reliability
If motor mechanism is added for optical image stabilization, then image quality is improved, but device complexity increases
Solution Approach 1:
The patent removes the complex motor mechanism and associated electromagnetic components, simplifying the overall device structure. The image quality improvement is achieved through a simpler mechanical rotation system that reduces the number of moving parts and eliminates electromagnetic interference with the lens control system.
3Reliability
If bias wire length is changed to rotate carrying base, then optical element position is adjusted for stabilization, but mechanical complexity increases
Solution Approach 1:
The patent utilizes parameter changes in the bias wire length to control the rotation of the carrying base. By adjusting the bias wire length, the carrying base rotates to change the orientation of the optical element, providing image stabilization through a simple parameter-based control mechanism rather than complex mechanical linkages.
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 improves image quality by effectively stabilizing images without generating electromagnetic fields, enhancing the performance of camera modules in portable electronic devices.
Implementation Method 1
The power source provides voltage to the bias wire via the first conductive end and the second conductive end, so as to change the length of the bias wire
Implementation Method 2
the rotation mechanism further includes an elastic element connected to the main base and the carrying base
Data Source
AI summary
An optical module is provided. The optical module includes a first optical element driving mechanism. The first optical element driving mechanism includes a first movable portion, a first fixed portion, and a first driving assembly. The first movable portion connects an optical path adjustment element. The optical path adjustment element is configured to change a transmission direction of incident light to a first direction that is different from the transmission direction. The first fixed potion is polygonal when viewed in the transmission direction. The first movable portion is movable relative to the first fixed portion. The first driving assembly drives the first movable portion to move relative to the first fixed portion. The first driving assembly comprises a shape memory alloy. The first driving assembly is located on a first side of the first fixed portion when viewed in the transmission direction.