Camera Module With Multi-Axis Reflector for Compact AF, Zoom, and OIS
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Solution Overview
Problem
Camera modules in portable electronic devices face challenges in size increase due to added functions like autofocusing, optical image stabilization, and zoom, leading to increased power consumption and difficulty in miniaturization.
Innovation Solution
A camera module design with a reflecting module and lens barrels aligned perpendicular to the optical axis, utilizing ball bearings and magnets for movement, allowing for compact size and reduced power consumption while implementing AF, zoom, and OIS functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If lens or image sensor is directly moved for OIS function, then OIS function is provided, but power consumption increases due to required driving force
Solution Approach 1:
A reflecting member (mirror) is introduced as an intermediary between the lens and the image sensor. Instead of moving the heavy lens or image sensor directly for OIS, the patent moves only the lightweight reflecting member to redirect light paths, thereby achieving OIS function with minimal power consumption
2Adaptability or versatility
If lens or image sensor is directly moved for OIS function, then OIS function is provided, but weight of moving components increases
Solution Approach 1:
The reflecting member serves as a lightweight intermediary that replaces the need to move heavy lens or image sensor assemblies. By moving only the mirror and its support structure, the overall moving weight is significantly reduced while maintaining OIS functionality
3Adaptability or versatility
If AF and zoom functions are implemented, then focusing and zooming capabilities are provided, but camera module size increases in optical axis direction
Solution Approach 1:
The patent changes the traditional optical axis arrangement by moving the reflecting member in a direction perpendicular to the optical axis. This dimensional change allows AF and zoom functions to be achieved without extending the camera module length in the optical axis direction, as the reflecting member can be positioned at angles to redirect light paths
4Weight of moving object
If reflecting member is moved in first and second axis directions perpendicular to optical axis, then OIS function is achieved with reduced weight, but structure becomes more complex
Solution Approach 1:
The camera module is segmented into distinct functional units: a lens module containing lenses for optical focusing, a reflecting module with the reflecting member for light redirection, and an image sensor module. Each module can be independently positioned and controlled, simplifying the overall structure while enabling the reflecting member to move in multiple directions for OIS
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 design achieves miniaturization of portable devices by optimizing lens placement and reducing power consumption without compromising functionality.
Implementation Method 1
a movable holder movably supported by an inner wall of the housing disposed in the internal space
Implementation Method 2
respective first and second magnets configured to react to coils provided on the housing configured to generate driving force in the optical axis direction
Data Source
AI summary
A camera module includes a housing having an internal space, a reflecting module including a reflecting member on a movable holder movably supported by an inner wall of the housing in the internal space, and a lens module disposed behind the reflecting module in the internal space, and including lenses aligned in an optical axis direction so that light reflected by the reflecting member is incident thereto. The movable holder is configured to move the reflecting member in a first axis direction approximately perpendicular to the optical axis direction and a second axis direction approximately perpendicular to the optical axis direction and the first axis direction with respect to the housing. The lens module includes at least two lens barrels disposed on sidewalls of the housing, linearly movable in approximately the optical axis direction, and including the lenses divided and disposed therein.