Variable Aperture Device for Camera Privacy Shielding
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Solution Overview
Problem
Existing electronic apparatuses, such as notebook computers and mobile phones, lack a mechanism to shield the camera lens from unauthorized access and privacy exposure.
Innovation Solution
A variable aperture device utilizing a shape memory metal wire, conductive terminals, and an elastic structure to form a controllable aperture, allowing for both small and large aperture settings by adjusting the electric current supplied, thereby shielding the lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a variable aperture device is added to shield the lens, then privacy protection is improved, but device complexity increases
Solution Approach 1:
The patent merges the aperture blade structure with the privacy shielding function into a single integrated component. The aperture blades serve dual purposes: controlling light entry for photography and physically blocking the lens when closed to prevent privacy leakage. This eliminates the need for separate shielding mechanisms, thereby improving privacy protection without proportionally increasing device complexity.
Solution Approach 2:
The aperture device is designed to perform multiple functions: it controls exposure for different shooting scenarios (portrait, landscape, macro) and simultaneously serves as a privacy shield when closed. The same mechanical structure that adjusts aperture size also provides physical occlusion of the lens, making the component universal and multi-functional rather than requiring dedicated separate systems.
2Object-affected harmful factors
If a traditional aperture shielding structure is used, then privacy protection is improved, but device thickness increases
Solution Approach 1:
The aperture blades are nested within the camera module housing, with the blades positioned concentrically around the lens. When closed, the blades nest together to form a compact circular barrier that fully occludes the lens without requiring additional external shielding structures. This nested arrangement achieves effective privacy protection while maintaining a thin device profile.
Solution Approach 2:
The aperture blades are constructed as thin, flexible metallic structures that can pivot and overlap to create an effective shield. These thin-blade structures provide sufficient optical occlusion when closed while adding minimal thickness to the overall device. The flexibility of the thin blades allows them to conform within the compact camera module space.
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 secure control over camera lens exposure, preventing privacy leakage while maintaining a thin device profile, with adjustable aperture settings.
Implementation Method 1
a shape memory metal wire, a movable portion, and a driven portion for forming an aperture together with the movable portion
Data Source
AI summary
A variable aperture device is described that includes a casing, a base with a light transmission hole, conductive terminals on the base, a terminal connecting portion, a shape memory metal wire, a movable portion, and a driven portion for forming an aperture together with the movable portion. One end of the shape memory metal wire is connected to the terminal connecting portion and the movable portion is connected to the base via a first rotating shaft. A side of the movable portion far from the light transmission hole around the first rotating shaft is connected to other end of the shape memory metal wire. A side of the movable portion near the light transmission hole around the first rotating shaft is connected to an elastic structure of the terminal connecting portion and the terminal connecting portion is attached to the conductive terminal.


