Camera Module Diaphragm Magnetic Actuation Autofocus
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Solution Overview
Problem
Conventional camera modules in portable electronic devices face challenges in incorporating a diaphragm due to structural and space limitations, leading to potential deterioration of autofocusing and accurate aperture control.
Innovation Solution
A camera module design featuring a diaphragm module with movable blades and a magnetic driving unit, including a driving coil and a magnetic member, which allows for precise control of aperture sizes by moving the magnetic member along a perpendicular path to form different apertures, minimizing weight and maintaining autofocusing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a mechanical diaphragm is provided to change the incident amount of light, then the aperture control is improved, but the weight of the camera module increases and autofocusing function deteriorates
Solution Approach 1:
The patent extracts the diaphragm driving components (coil and magnetic member) from the lens module and places them in a separate housing. This separation removes the weight burden from the moving lens assembly, allowing the lens to move freely for autofocusing without being constrained by the weight of diaphragm driving components. The diaphragm module retains its aperture control function while the lens module maintains its autofocusing capability.
Solution Approach 2:
The camera module is divided into distinct functional modules: a lens module for focusing and a separate diaphragm module for aperture control. This segmentation allows each module to be optimized independently - the lens module can be lightweight for autofocusing while the diaphragm module contains the necessary driving components without affecting lens movement.
2Manufacturing precision
If a coil for driving the diaphragm is provided in the diaphragm itself, then the aperture control is improved, but the power connection portion is caught by the vertical movement of the lens during autofocusing
Solution Approach 1:
The power connection portion (coil and magnetic member) is extracted from the diaphragm assembly and placed in a separate housing. This spatial separation ensures that the power connection components are stationary and cannot be caught or interfered with by the vertical movement of the lens during autofocusing operations, eliminating the reliability issue.
3Adaptability or versatility
If a diaphragm module having various apertures is installed in a relatively narrow space, then the aperture variety is improved, but the position of the driving unit cannot be accurately fixed and accurate aperture cannot be realized
Solution Approach 1:
The patent introduces a housing as an intermediary structure that provides a stable, dedicated space for the diaphragm driving unit. This housing acts as a mediator between the narrow camera module space and the diaphragm components, allowing the driving unit to be accurately positioned and fixed without being constrained by the overall narrow space of the camera module. The housing provides reference surfaces and mounting structures that ensure precise positioning.
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 solution enables accurate and efficient control of light incidence, maintaining image quality under varying illumination conditions while preventing the deterioration of autofocusing and image stabilization functions.
Implementation Method 1
a diaphragm driving unit disposed with the diaphragm module, and including a driving coil and a magnetic member disposed opposite to the driving coil
Implementation Method 2
a magnetic member movable in a direction perpendicular to an optical axis to be fixed in N positions along a movement path
Data Source
AI summary
A camera module includes a housing including a lens module; a diaphragm module to form N apertures of different sizes, where N is a natural number, with blades disposed on an object side of the lens module; and a diaphragm driving unit disposed with the diaphragm module, and including a driving coil and a magnetic member disposed opposite to the driving coil, the magnetic member being movable in a direction perpendicular to an optical axis to be fixed in N positions along a movement path.