Fingerprint Detection Module with Segmented Sensor Array
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Solution Overview
Problem
Fingerprint authentication in electronic devices is not completely secure as stolen fingerprint patterns can be replicated to gain unauthorized access, and existing sensors are prone to false activations from incidental touches and weak capacitive signals.
Innovation Solution
A fingerprint detection module with an array of sensor pixels and advanced signal processing to capture and analyze fingerprint images, using a combination of registration and authentication modes, and integrating motion and biometric sensors in wearable devices for enhanced security and data correlation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fingerprint sensors are used for authentication, then user access can be controlled, but the system is vulnerable to stolen fingerprint pattern replication and false activations from incidental touches
Solution Approach 1:
The sensor array is divided into multiple columns of sensor pixels, with each column independently integrated. This segmentation allows for selective processing and noise filtering, where incidental touches affecting certain columns can be identified and excluded from authentication decisions, thereby reducing false activations while maintaining security
Solution Approach 2:
The system changes the parameter of signal integration by simultaneously integrating sensor data from multiple columns of sensor pixels. This parameter change enhances the signal-to-noise ratio and allows the system to distinguish between genuine fingerprint patterns and incidental touches, improving reliability while reducing false activations
2Reliability
If fingerprint authentication is implemented in wearable devices with continuous sensing, then security is enhanced, but device complexity and power consumption increase
Solution Approach 1:
The fingerprint sensor array in wearable devices serves multiple functions: continuous authentication monitoring, contactless detection, and security verification. By making the sensor system universal and multi-functional, the patent reduces overall device complexity as a single sensor array handles multiple security and detection tasks that would otherwise require separate systems
Solution Approach 2:
The patent combines multiple sensor pixels and columns into a single integrated sensing system with unified signal processing. This merging approach consolidates what would otherwise be separate authentication and detection functions into one cohesive system, reducing device complexity while enabling continuous sensing and authentication capabilities
Data Source
AI summary
In one aspect, a method for registering a fingerprint profile on a mobile device includes detecting, at a fingerprint detection module having a rectangular shape, a contact from a finger associated with a swipe motion. The method includes responsive to the detected contact at the fingerprint detection module having a rectangular shape, capturing an image of the finger during the swipe motion. The method includes storing the image of the finger captured during the swipe motion as a registered fingerprint profile of an authorized user.