Imaging Device Blade Controller for Authentication Security
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Solution Overview
Problem
Existing imaging devices with anti-peeping components to prevent secret photography cannot use captured images for authentication, necessitating alternative authentication methods.
Innovation Solution
An imaging device with a movable blade that blocks or allows light to the image sensor, controlled by a blade controller, which automatically switches states based on authentication success or failure, ensuring security without additional authentication devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blade is used to block light incident on the image sensor to prevent secret photography, then security against unauthorized access is improved, but the device cannot use captured images for authentication and requires alternative authentication methods
Solution Approach 1:
The blade is made dynamically controllable between open and closed states. The blade controller adjusts the blade position based on authentication status: closed during authentication to allow imaging, open during normal operation to prevent secret photography. This dynamic adaptability resolves the contradiction by making the security feature context-dependent rather than static.
Solution Approach 2:
The system implements feedback control where the blade controller receives authentication results and automatically adjusts the blade state accordingly. Successful authentication triggers the blade to open, allowing subsequent imaging operations. This feedback mechanism enables the device to use its own imaging capability for authentication while maintaining security, eliminating the need for alternative authentication methods.
2Ease of operation
If the blade remains in the open state to allow imaging for authentication, then authentication can be performed, but security is compromised if authentication fails and the blade remains open
Solution Approach 1:
The blade controller continuously monitors authentication status and provides feedback control of the blade state. Upon authentication failure, the controller immediately closes the blade, preventing any further unauthorized imaging attempts. This feedback mechanism ensures that the blade state always reflects the current security status, resolving the contradiction between ease of authentication and security maintenance.
Solution Approach 2:
The blade is positioned in the closed state by default before authentication occurs, as a preliminary security measure. Only upon successful authentication does the blade transition to the open state. This preliminary action ensures that even if authentication fails, the blade never remains open, maintaining security while still allowing the authentication process to proceed.
3Reliability
If the blade is automatically controlled based on authentication results, then security is improved by automatic closing on failure, but the device complexity increases with additional controllers and drivers
Solution Approach 1:
The blade controller integrates multiple functions: it controls the blade driver, monitors authentication status, determines blade state requirements, and executes state changes. By merging these functions into a single controller, the system achieves the required security automation without proportionally increasing complexity. The controller communicates with the existing image sensor and authentication processor, leveraging existing device architecture.
Solution Approach 2:
The blade controller serves multiple purposes: it manages the blade position for security, coordinates with the authentication processor, and controls the blade driver. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in overall device complexity while achieving automatic security response.
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 authentication using the image sensor within the imaging device, improving security by automatically closing the blade upon authentication failure and preventing unintended opening.
Implementation Method 1
a blade (80) operable to switch between a closed state to at least partially block light incident on the image sensor and an open state to allow light to be incident on the image sensor
Data Source
AI summary
An imaging device includes an image sensor, a blade operable to switch between a closed state to at least partially block light incident on the image sensor and an open state to allow light to be incident on the image sensor, a blade driver that drives the blade, a blade controller that controls the blade driver, an authentication processor that performs authentication based on a result of imaging performed by the image sensor, and an operation detector that detects an operation. The blade controller controls the blade driver to place the blade in the open state in response to a predetermined operation detected by the operation detector and to place the blade in the closed state in response to a predetermined time passing in the open state of the blade and no success in the authentication performed by the authentication processor.