Post-Verification Fingerprint Capture for Speed and Quality
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Solution Overview
Problem
Fingerprint sensing systems in electronic devices face a trade-off between capturing fingerprint data quickly and ensuring high-quality data, where short capture times result in poor-quality data, while longer times are required for high-quality data.
Innovation Solution
The method involves capturing initial fingerprint data for authentication and continuing to capture further data after the initial action is performed, allowing for a higher-quality fingerprint representation without extending the initial capture time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the fingerprint sensor captures fingerprint data for a short period, then the authentication speed is improved, but the fingerprint data quality deteriorates
Solution Approach 1:
The patent segments the fingerprint capture process into two distinct phases: an initial capture phase that triggers immediate authentication actions, and a subsequent extended capture phase that continues collecting data while the finger remains on the sensor. This segmentation allows the system to satisfy both the speed requirement (by having initial data ready for immediate action) and the quality requirement (by continuing to accumulate additional data in the background).
Solution Approach 2:
The system performs preliminary fingerprint capture to obtain sufficient data for immediate authentication actions, then continues capturing additional data in the background. This preliminary action ensures that authentication can proceed at high speed without waiting for complete data collection, while the extended capture continues to improve data quality for future use and template updates.
2Measurement precision
If the fingerprint sensor captures fingerprint data for a long period, then the fingerprint data quality is improved, but the authentication time increases
Solution Approach 1:
The patent divides the capture process into an initial phase that provides sufficient data for immediate authentication, and an extended phase that continues collecting data without blocking the authentication flow. This segmentation eliminates the need to wait for complete data collection before performing authentication actions.
Solution Approach 2:
The system continues the fingerprint capture action continuously in the background even after initial authentication data has been obtained. This continuous capture improves data quality for future authentication attempts and template updates without impacting the speed of current authentication operations, as the additional data collection occurs parallel to the authentication process.
Data Source
AI summary
The invention relates to a method of a fingerprint sensing system arranged in an electronic device of capturing fingerprint data of a user contacting a fingerprint sensor of the fingerprint sensing system, and a fingerprint sensing system performing the method.