Biometric Sensor Control Unit for Read Failure Notification
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Solution Overview
Problem
Fingerprint sensors on electronic devices often fail to read fingerprints when the thumb moves during reading or contact time is short, leading to repeated attempts without notification of read failure, resulting in poor operability.
Innovation Solution
A biometric information sensor device with a control unit that issues a notification for failure to read biometric information after contact detection, improving user awareness and reducing repeated attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the fingerprint sensor reads the fingerprint quickly, then the authentication speed is improved, but the reading accuracy deteriorates when the thumb moves or contact time is short
Solution Approach 1:
The control unit provides feedback to the user by notifying them when fingerprint reading fails. This feedback mechanism allows users to understand that reading failed and retry, effectively resolving the contradiction by maintaining quick reading attempts while improving overall authentication success rate through user awareness.
2Measurement precision
If the fingerprint sensor requires stable contact for accurate reading, then the reading accuracy is improved, but the ease of operation deteriorates as users must maintain precise contact
Solution Approach 1:
By providing immediate feedback when reading fails, the system guides users to adjust their contact without requiring them to understand the technical reasons. This maintains high accuracy requirements while improving ease of operation through intuitive feedback.
3Productivity
If the system allows multiple retry attempts without notification, then the productivity is improved through continuous attempts, but the operability deteriorates as users repeat failed attempts without understanding the issue
Solution Approach 1:
The notification system provides essential feedback that balances productivity and operability. Users can continue to retry (maintaining productivity) but now have the information needed to understand failures and adjust their actions (improving operability).
Data Source
AI summary
A biometric information sensor device includes a control unit that issues a notification for failure to read biometric information of a detection target when reading of the biometric information fails after a contact of the detection target with a reading surface is detected.