Rotatable Reflection Module for Compact Camera OIS
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Solution Overview
Problem
Existing camera modules in portable electronic devices face challenges in minimizing image resolution degradation due to limited space for optical imaging stabilization, which requires effective use of reflective members and precise rotation mechanisms.
Innovation Solution
The camera module incorporates a reflection module with a reflective member that is rotatable about two axes, utilizing ball members for support and electromagnetic driving units for shake correction, allowing for efficient optical imaging stabilization within limited space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a reflective member is added to secure sufficient total track length (TTL) in limited space, then the TTL is improved, but the device complexity increases
Solution Approach 1:
The patent combines the reflective member with the image sensor module into an integrated reflection module, merging two functional components (reflection and imaging) into a single unit that can be supported on the housing, thereby achieving sufficient TTL without proportionally increasing overall device complexity
Solution Approach 2:
The reflective member is configured to reflect light at an angle (typically 45 degrees) to change the optical path direction, effectively extending the TTL in the optical axis direction by utilizing spatial arrangement in perpendicular dimensions, thus achieving longer TTL without increasing the physical length of the device
2Reliability
If a reflection module is made rotatable for optical imaging stabilization, then the stabilization function is improved, but the device complexity increases
Solution Approach 1:
The reflection module is designed to perform multiple functions: it serves as both a light reflecting component for achieving sufficient TTL and a rotatable stabilization mechanism for OIS, allowing one component to fulfill multiple roles and reducing overall device complexity
Solution Approach 2:
The reflection module is configured to be rotatable about the optical axis, transforming from a static reflective component to a dynamic one that can adjust its orientation to correct for camera shake, thereby enabling stabilization functionality
3Volume of moving object
If the reflection module is supported on the housing in the optical axis direction, then the space utilization is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The camera module is divided into distinct functional modules (lens module, reflection module, image sensor module) that are independently supported on the housing, allowing each module to be manufactured and assembled separately with standardized mounting interfaces, thereby reducing overall manufacturing precision requirements
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 configuration minimizes image resolution degradation during shake correction by effectively utilizing the limited space for precise rotation and stabilization of the reflection module, enhancing the overall performance of the camera module.
Implementation Method 1
a shake correction magnet and a shake correction coil configured to generate electromagnetic force
Implementation Method 2
a reflection module including a reflective member, and supported on the housing
Implementation Method 3
a plurality of ball members disposed between the reflection module and the housing
Data Source
AI summary
A camera module includes a housing, a reflection module including a reflective member, and supported on the housing, a lens module including a plurality of lenses arranged in an optical axis direction, and supported on the housing in a direction different from that of the reflection module, wherein the reflection module is configured to be rotatable with respect to the housing using an optical axis and a first axis perpendicular to the optical axis, as rotation axes, and the reflection module is supported on the housing in the optical axis direction.