Reflective Module Rotating Holder Driving Magnet Coil Arrangement
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Solution Overview
Problem
Camera modules with reflectors face spatial limitations due to the need for components that provide rotational driving force and stable support, which can be challenging around a relatively small reflector.
Innovation Solution
A reflective module is designed with a housing, a rotating holder, a reflective holder with a magnetic material, and a driving unit comprising magnets and coils to generate a driving force for rotating the reflective member, allowing for improved spatial arrangement and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a reflector is used to increase optical path length, then zoom magnification is improved, but spatial arrangement becomes more difficult due to limited space around the small reflector
Solution Approach 1:
The driving magnet is positioned on the rotating holder while the driving coil is positioned on the housing, creating a three-dimensional arrangement where the magnetic field interacts across different spatial dimensions. This allows the driving components to be distributed in space rather than confined to a single plane around the reflector, reducing spatial arrangement complexity while maintaining the optical path lengthening function.
Solution Approach 2:
The housing serves multiple functions: it provides structural support, contains the driving coil, and acts as part of the magnetic circuit. The rotating holder simultaneously supports the reflector, provides the mounting position for the driving magnet, and enables rotational movement. This multi-functionality reduces the number of separate components needed, simplifying spatial arrangement.
2Reliability
If driving components are added to rotate the reflector, then optical image stabilization is improved, but the available space for stable support components is reduced
Solution Approach 1:
The driving magnet and driving coil are integrated into the existing structural components - the magnet is mounted on the rotating holder and the coil is mounted on the housing. This merging of driving components with structural elements eliminates the need for separate dedicated spaces for these components, allowing optical image stabilization functionality to be added without significantly reducing available support space.
3Volume of moving object
If the camera module size is reduced, then portability is improved, but accommodating all necessary components becomes more difficult
Solution Approach 1:
The driving magnet is nested on the rotating holder, which itself is nested within the housing. The driving coil is positioned on the housing surrounding the rotating assembly. This nested arrangement allows multiple components to occupy overlapping or adjacent spatial volumes, enabling compact integration of all necessary components while maintaining functionality and reducing overall camera module size.
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 reflective module enhances the degree of freedom in implementing camera modules by optimizing the spatial arrangement of components, enabling smooth operation and potentially reducing the size of the camera module.
Implementation Method 1
a first driving magnet disposed on the rotating holder, and a first driving coil disposed on the housing
Implementation Method 2
the first driving magnet faces the first magnetic material in a second direction different from the first direction
Data Source
AI summary
A reflective module is provided. The reflective module includes a housing; a rotating holder accommodated in the housing; a reflective holder, disposed on the rotating holder, and on which a first magnetic material and a reflective member configured to change a path of incident light are disposed; and a driving unit configured to generate a driving force to rotate the reflective member, wherein the driving unit includes a first driving magnet disposed on the rotating holder, and a first driving coil disposed on the housing, and wherein the first driving magnet faces the first driving coil in a first direction, and faces the first magnetic material in a second direction different from the first direction.