Biometric Access Control Using Photovoltaic Body Reflection

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Solution Overview

Problem

Conventional locks, including mechanical and electronic locks, face issues such as being inaccessible if a physical key or keycard is lost or forgotten, and biometric locks may not provide sufficient security against unauthorized access.

Innovation Solution

A system utilizing a feature extraction device with a photovoltaic module and lighting module to generate a unique identification code based on the electrical quantities produced by photovoltaic units when light is reflected off a subject's body, enhancing access control security by creating a unique identification code through varying illumination intensities and patterns.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional mechanical locks with physical keys are used, then the locking function is simple and reliable, but the lock cannot be opened if the physical key is lost

Engineering Contradiction:

Improveaccess reliabilityVSAvoidaccess method flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent changes the parameter of identification from static physical objects (keys, keycards) to dynamic biometric features combined with behavioral patterns. The system captures multiple parameters including facial features, iris patterns, and eye movement characteristics, converting them into a comprehensive identification code that remains valid even if one parameter changes or is compromised.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If conventional electronic locks with keycards or passwords are used, then the locking function is improved, but the lock cannot be opened if the keycard is lost or password is forgotten

Engineering Contradiction:

Improveaccess reliabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical and electronic key-based systems with a biometric recognition system. Instead of using physical keys, keycards, or memorized passwords, the system uses unique physiological features (facial structure, iris patterns) combined with behavioral characteristics (eye movement patterns) to authenticate users, eliminating the need for external authentication objects.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If biometric locks using fingerprint or facial features are used, then the convenience of access is improved, but the security against unauthorized access is insufficient

Engineering Contradiction:

Improveaccess convenienceVSAvoidsecurity reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent segments the biometric identification process into multiple independent components: static facial features, iris patterns, and dynamic eye movement characteristics. Each component serves as a separate authentication layer, and the combination of these segmented features creates a comprehensive identification code that is significantly more secure than any single biometric feature alone.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent adds a temporal and dynamic dimension to traditional static biometric recognition. While conventional systems only capture spatial features (facial geometry, fingerprint patterns), this system incorporates the dimension of time by tracking eye movement trajectories, pupil dilation patterns, and other dynamic characteristics that change over time, creating a multi-dimensional identification space that is harder to replicate.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 provides secure access control by generating a unique identification code that is difficult to counterfeit, addressing the limitations of conventional locks and enhancing security through the use of photovoltaic modules and lighting control units.

Implementation Method 1

The photovoltaic module includes a plurality of photovoltaic units that are arranged in an array and that are configured to cooperatively receive light reflected off the body portion of the subject which is illuminated by the light from said lighting module. Each of the photovoltaic units is configured to convert light energy of the light received thereby into electricity.

Methodology Applied

Scientific EffectPhotovoltaic effect: Photovoltaic Effect

Data Source

PatentUS11568697B2System for composing identification code of subject

Publication Date: 2023.01.31 SOUTHERN TAIWAN UNIVERSITY OF TECHNOLOGY

AI summary

A system includes a lighting module, a processing module, and photovoltaic units. Each of the photovoltaic units receives light reflected off a body portion which is illuminated by light from the lighting module, and converts light energy of the reflected light into electricity. The processing module stores modes each of which specifies a code set. When one of the modes is selected, the processing module activates the lighting module to emit light based on the code set specified by the mode thus selected. The processing module converts electrical quantities measured individually for the photovoltaic units into respective code parameters, and composes an identification code using the code parameters.