Fingerprint Sensor Under Display for Natural Biometric Registration
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Solution Overview
Problem
The existing methods for registering fingerprint data on portable electronic devices are inconvenient, requiring multiple repetitions and taking significant time due to the small size of fingerprint sensors, which leads to a decrease in recognition accuracy and user experience.
Innovation Solution
An electronic device with a display and a fingerprint sensor that acquires fingerprint data through a display region, utilizing a processor to execute applications for fingerprint registration, allowing natural input and clustering of fingerprint data to reduce registration operations and prevent misregistration of different fingers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the fingerprint sensor size is kept small to maintain device portability, then the device remains portable and compact, but the recognition accuracy decreases and multiple registration operations are required
Solution Approach 1:
The system performs preliminary fingerprint data collection during natural device operations (camera usage, recording, etc.) before the actual registration process. This preliminary action accumulates sufficient fingerprint data in advance, so when registration is needed, the pre-collected data can be used directly, eliminating the need for multiple repeated registration operations and maintaining high recognition accuracy despite the small sensor size.
2Measurement precision
If multiple fingerprint registration operations are performed to improve recognition accuracy, then the recognition rate increases, but the time required for registration increases significantly
Solution Approach 1:
The system collects fingerprint data in advance during natural device usage (camera operation, audio recording, etc.) and stores it for later registration. This preliminary data collection eliminates the need for time-consuming repeated registration operations, as the system can directly use the pre-collected fingerprint data to complete registration in a single operation while maintaining high recognition accuracy.
Solution Approach 2:
The fingerprint data collection occurs continuously during natural device operations rather than requiring dedicated registration time. The system accumulates fingerprint data whenever the sensor is naturally activated during device usage, making the data collection process continuous and seamless, thereby eliminating separate registration time while ensuring sufficient data quality.
3Device complexity
If the fingerprint sensor is integrated into the display region to improve device integration, then the device design is improved, but the sensor area available for fingerprint acquisition is limited
Solution Approach 1:
The system performs preliminary and continuous fingerprint data collection during natural device operations, accumulating sufficient fingerprint data over time. This approach compensates for the limited sensor area by gathering data across multiple opportunities, ensuring that even a small integrated sensor can collect enough high-quality fingerprint information for accurate recognition.
Solution Approach 2:
The system continuously collects fingerprint data whenever the integrated sensor is activated during normal device usage (camera operation, recording, etc.). This continuous data collection maximizes the utilization of the limited sensor area, accumulating sufficient fingerprint information over time despite the small acquisition area, thereby maintaining high recognition accuracy.
Data Source
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AI summary
An electronic device for acquiring biometric information may include a display, and a fingerprint sensor configured to acquire fingerprint data through at least a partial display region of the display. A processor may execute a first application in which a graphical object is displayed, for controlling a designated function other than a fingerprint registration function. A user input on the graphical object may be used to collect fingerprint information, which is used as part of a fingerprint registration function.