Multispectral Imaging Pixel Layout for Secure Authentication
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Solution Overview
Problem
Current authentication systems based on single-sensor information are vulnerable to unauthorized access, such as identity theft, and lack sufficient security measures.
Innovation Solution
A solid-state imaging device with a matrix of unit pixels, including both RGB and IR pixels, where each unit pixel has a signal processing circuit that converts analog signals from both types of pixels into digital signals, enhancing authentication security through multi-spectral data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single-sensor information is used for authentication, then device complexity is reduced, but security against unauthorized access deteriorates
Solution Approach 1:
The patent combines multiple sensors (RGB sensor and IR sensor) into a single authentication system. The RGB sensor captures visible light information while the IR sensor captures infrared information, and both are integrated into one device to perform multi-factor authentication. This merging approach improves authentication security by preventing unauthorized access while maintaining manageable device complexity through integrated design.
2Measurement precision
If multiple sensors are integrated for authentication, then recognition accuracy is improved, but device complexity increases
Solution Approach 1:
The authentication device is designed with multi-functionality, incorporating both RGB and IR sensing capabilities within a single system. The device can perform different authentication modes (visible light authentication and infrared authentication) using the same hardware platform, thereby improving recognition accuracy without proportionally increasing device complexity. The control unit coordinates both sensors to achieve versatile authentication functions.
3Productivity
If analog signals from multiple pixels are converted to digital signals, then data processing capability is improved, but signal processing circuit complexity increases
Solution Approach 1:
The signal processing circuit is segmented into dedicated conversion circuits for different sensor types. The RGB sensor has its own analog-to-digital conversion circuit, and the IR sensor has its own separate conversion circuit. This segmentation allows each circuit to be optimized for its specific sensor type, improving data processing capability while managing overall circuit complexity through modular design. Each conversion circuit processes signals independently before they are combined for final authentication processing.
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 system achieves more secure authentication by integrating RGB and IR image data, improving recognition accuracy and preventing unauthorized access through multi-stage recognition processing.
Implementation Method 1
a first pixel that is disposed on a first surface and that detects light of a first wavelength band
Implementation Method 2
a second pixel that is disposed on a second surface parallel to the first surface and that detects light of a second wavelength band different from the first wavelength band
Data Source
AI summary
To achieve more secure authentication. A solid-state imaging device according to an embodiment includes: a plurality of unit pixels arranged in a matrix; and signal processing circuits each of which reads out a signal from each of the unit pixels. Each of the unit pixels includes: a first pixel that is disposed on a first surface and that detects light of a first wavelength band; and a second pixel that is disposed on a second surface parallel to the first surface and that detects light of a second wavelength band different from the first wavelength band. The signal processing circuit includes a first conversion circuit that is connected to the first pixel and the second pixel in each of the unit pixels and that converts an analog signal output from each of the first pixel and the second pixel into a digital signal.