Multi-Surface Finger Scanner with Height Difference for Forgery Detection
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Solution Overview
Problem
Current fingerprint scanning technologies are vulnerable to forgery, as they cannot reliably distinguish between real skin and counterfeit materials imitating fingerprints, leading to security concerns in identification and access applications.
Innovation Solution
A finger scanner design featuring a first and second contact surface with a fixed or variable height difference, where the combination of outputs from associated fingerprint sensors captures the deformation of skin under different pressure points, allowing for differentiation between genuine skin and counterfeit materials based on deformation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional single-surface fingerprint scanning is used, then the scanning process is simple and quick, but the system is vulnerable to forgery by counterfeit materials
Solution Approach 1:
The scanner is divided into multiple independent contact surfaces (first contact surface and second contact surface) with different heights, each equipped with its own fingerprint sensor. This segmentation allows the system to capture deformation patterns from multiple perspectives, making it difficult for counterfeit materials to replicate all characteristics simultaneously, thus resolving the contradiction between security and complexity.
Solution Approach 2:
The invention introduces a height dimension difference between contact surfaces, creating a three-dimensional scanning structure. The first and second contact surfaces are positioned at different heights, allowing sensors to detect deformation patterns from multiple vertical levels. This dimensional addition enhances forgery detection capability while maintaining a relatively compact device structure.
2Reliability
If multiple contact surfaces with height difference are used to detect skin deformation, then security against forgery is enhanced, but the scanning process becomes more complex
Solution Approach 1:
Multiple fingerprint sensors detecting from different contact surfaces are merged into a single authentication process. The sensors work simultaneously to capture deformation patterns, and their data is integrated to produce a comprehensive authentication result. This merging allows the complex multi-surface scanning to be operated as a single unified action by the user, resolving the contradiction between authentication accuracy and operational simplicity.
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
This approach significantly enhances security by providing a unique deformation pattern for real skin, effectively rejecting counterfeit attempts and ensuring accurate authentication by comparing scan results with stored authentic data.
Implementation Method 1
captures the deformation of skin under different pressure points
Data Source
Figure 1a~3b
Figure 3c~3h
Figure 4~5b
AI summary
A finger scanner comprises a first member and a second member. The first member has a first contact surface configured to contact a first part of a finger, and the second member has a second contact surface adjacent to the first member and configured to contact a second part of the finger adjacent to the first part of the finger. The first contact surface has a first height and the second contact surface has a second height, with a fixed or variable height difference between the first height and the second height. The finger scanner further comprises a first fingerprint sensor associated with the first contact surface, and a second fingerprint sensor associated with the second contact surface.