Light Pass Aperture Module Blade Floatation Control
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Solution Overview
Problem
Conventional variable aperture stops in camera modules suffer from bias and light leakage due to blade movement, leading to image quality deterioration as the blades can float upward, compromising the background blur and image clarity.
Innovation Solution
A light pass aperture module with a blade assembly and a cap, where the cap includes surface level down structures that prevent blade floatation by maintaining a stable rotation path, ensuring accurate aperture positioning and minimizing friction between blades, thereby preventing bias and light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a variable aperture stop is used to adjust background blur and control incident light, then the functionality and image quality control are improved, but blade floatation upward causes bias and light leakage leading to image quality deterioration
Solution Approach 1:
A support structure is introduced as an intermediary component between the blade assembly and the aperture stop. This support structure provides stable positioning for the blades, preventing them from floating upward while maintaining the variable aperture functionality. The support structure acts as a mediator that resolves the contradiction between aperture adjustment capability and positioning stability.
2Manufacturing precision
If multiple blades are used to form the aperture stop, then the aperture control precision is improved, but blade floatation causes bias and light leakage
Solution Approach 1:
The support structure serves as a mediator that prevents blades from floating upward, thereby eliminating light leakage and bias while maintaining the precision of the multi-blade aperture control system.
Solution Approach 2:
The support structure is designed to prevent blade floatation before it can cause harmful effects. By providing preliminary support and stabilization, the system prevents the blades from moving upward into positions that would cause light leakage or optical bias.
3Adaptability or versatility
If the aperture stop is made variable to control incident light, then the adaptability for different applications is improved, but the complexity of the blade assembly increases
Solution Approach 1:
The support structure is a relatively simple intermediary component that adds minimal complexity while enabling the variable aperture functionality. It provides the necessary stabilization without significantly increasing the overall device complexity, thus maintaining adaptability for different applications.
Data Source
AI summary
A light pass aperture module, in order along a central axis, includes a blade assembly and a cap. The blade assembly includes a plurality of blades. The blades form a light pass aperture, and the light pass aperture is variable in size with the central axis as a center. The cap covers the blade assembly. The cap has a through hole, and the through hole is disposed corresponding to the light pass aperture. The cap includes a surface level down structure. The surface level down structure is disposed corresponding to one of the blades, and the surface level down structure is closer to the one blade than the through hole.