Optical Path Conversion Module with Side-Mounted Driving Units
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Solution Overview
Problem
Existing camera modules in portable terminals face challenges in precise driving of optical path converters due to magnetic field interference from external components like magnetic field shielding plates.
Innovation Solution
An optical path conversion module is designed with a first and second driving unit disposed on the side surfaces of the optical path converter, allowing for precise rotation about multiple axes without magnetic field interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a magnetic field shielding plate is used to minimize interference between the liquid crystal screen and electronic components, then electromagnetic interference is reduced, but the driving unit in the camera module experiences magnetic field interference that prevents precise driving
Solution Approach 1:
A magnetic field shielding structure is introduced as an intermediary element positioned between the magnetic field source and the driving unit. This shielding structure selectively blocks magnetic field lines from reaching the driving unit while allowing other electromagnetic fields to pass through, thereby protecting the driving unit from magnetic interference without completely isolating it from necessary electromagnetic signals for operation
Solution Approach 2:
The shielding structure is divided into multiple segments or zones with different shielding characteristics. Certain areas provide strong magnetic field shielding while other areas maintain electromagnetic signal transmission, allowing the system to simultaneously achieve magnetic field protection and electromagnetic communication functionality
2Length of stationary object
If the camera module is miniaturized by reducing height in the first optical axis direction, then the portable terminal size is reduced, but the driving units must be disposed on side surfaces which increases lateral space requirements
Solution Approach 1:
The driving units are repositioned from the traditional vertical arrangement to the side surface of the optical path converter, utilizing the lateral dimension instead of the vertical dimension. This dimensional transition allows the camera module height to be reduced while the driving units are accommodated on the side surfaces, effectively distributing the spatial requirements across different dimensions
3Reliability
If the optical path converter is rotated about multiple axes to minimize resolution deterioration from handshake or tremble, then image stabilization is improved, but the device complexity increases with multiple driving units
Solution Approach 1:
Multiple driving units are integrated onto a single side surface of the optical path converter, sharing common structural support and control circuitry. The driving units are arranged in a compact configuration where they can share mounting structures, wiring harnesses, and control electronics, thereby reducing overall device complexity while maintaining the capability for multi-axis rotation and image stabilization
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 optical path conversion module enables precise driving of the optical path converter, minimizing interference from external magnetic fields, thus maintaining the camera module's functionality and miniaturization goals.
Implementation Method 1
an optical path converter configured to reflect or refract light, incident along a first optical axis, in a direction of a second optical axis
Implementation Method 2
an optical path converter configured to reflect or refract light, incident along a first optical axis, in a direction of a second optical axis
Data Source
AI summary
A camera module includes a housing; a lens module accommodated in the housing and configured to adjust focus or adjust focus magnification; and an optical path conversion module accommodated in the housing and configured to convert an optical path. The optical path conversion module includes a prism; a first movable body accommodating the prism; a fixed body accommodating the first movable body; a first driving unit enabling first rotational driving of the first movable body, relative to the fixed body; and a second driving unit enabling second rotational driving of the first movable body, relative to the fixed body.