Camera Module Folded Optical Path and Magnetic Lens Support
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Solution Overview
Problem
Camera modules in mobile devices face limitations in increasing zoom magnification due to the need for a longer total track length, which can result in a larger overall size and issues with accurate lens movement and optical image stabilization, while also facing challenges in reducing size and minimizing electromagnetic interference.
Innovation Solution
A camera module design that includes a lens module supported by magnetic members and ball members, with a reflective member for optical axis alignment and stabilization, allowing for a longer total track length without increasing size, and utilizing a folded module structure to change the light path efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the total track length is increased to increase zoom magnification, then the zoom magnification is improved, but the overall length of the camera module increases
Solution Approach 1:
The patent introduces a reflective member that changes the light path direction by approximately 90 degrees, allowing the optical system to achieve a longer total track length in a folded configuration. This enables high zoom magnification while keeping the camera module's overall length compact by utilizing spatial dimensionality change rather than linear extension
2Adaptability or versatility
If the movement range of the lens module is increased to provide a wide range of zoom magnification, then the zoom magnification range is improved, but the lens module may move in a direction different from the intended direction or the position of the lens module may not be accurately detected
Solution Approach 1:
The patent employs three ball members positioned at specific locations to support the lens module, with each ball member providing localized support and guidance. This distributed support system ensures accurate position detection and prevents deviation from the intended movement direction while allowing a wide movement range for zoom magnification adjustment
3Length of stationary object
If a reflective member is used to change the light path and implement a long total track length, then the total track length is improved, but it may be difficult to reduce the size of the camera module or electromagnetic interference with other electronic elements may occur
Solution Approach 1:
The reflective member is positioned to change the light path direction by approximately 90 degrees, creating a folded optical path that achieves a long total track length within a compact camera module volume. This dimensional approach allows the optical system to fit within smaller spaces while maintaining the required optical path length
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
Enables high zoom magnification with stable lens movement and optical image stabilization, while maintaining a compact size and reducing electromagnetic interference, thus enhancing image quality and device usability.
Implementation Method 1
The lens module is attached to one surface of the housing by magnetic attraction force arising between the first magnetic member and the second magnetic member
Data Source
AI summary
A camera module includes: a housing; a lens module configured to move in an optical axis direction in the housing; a first magnetic member disposed in the lens module; and a second magnetic member disposed to oppose the first magnetic member in the housing. The lens module is attached to one surface of the housing by magnetic attraction force arising between the first magnetic member and the second magnetic member. The lens module is supported at three points by three ball members disposed between the lens module and the housing. The first magnetic member is disposed in the lens module such that the first magnetic member is disposed in a triangle formed by virtual lines connecting the three ball members to each other.