Under-display Fingerprint Sensor Gesture Activation
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Solution Overview
Problem
Electronic devices with fingerprint recognition systems often consume unnecessary power and experience errors or delays due to fingerprint image deformation caused by drag/swipe gestures, which can lead to inaccurate authentication.
Innovation Solution
The system determines the optimal time to activate the fingerprint sensor based on pressure profile information, correcting fingerprint image deformation and improving recognition rates by integrating a processor, memory, and sensors to manage gesture inputs and pressure data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the fingerprint sensor is continuously activated to ensure recognition availability, then the recognition response speed is improved, but the power consumption increases
Solution Approach 1:
The system performs preliminary identification of authentication intent through gesture recognition and pressure profile analysis before activating the fingerprint sensor. By detecting drag/swipe gestures and analyzing pressure characteristics, the system predicts when authentication is needed and activates the sensor in advance, ensuring fast response while avoiding continuous activation and reducing power consumption.
2Speed
If the fingerprint sensor is activated early to prepare for authentication, then the recognition response speed is improved, but the power consumption increases
Solution Approach 1:
The system continuously monitors gesture input and pressure profile data as feedback to dynamically control fingerprint sensor activation. When the feedback indicates a drag/swipe gesture with pressure characteristics matching registered patterns, the sensor is activated. This feedback-driven approach ensures the sensor is activated only when authentication is actually needed, eliminating unnecessary current consumption while maintaining fast response.
3Measurement precision
If the fingerprint sensor processes all gesture inputs to ensure accurate authentication, then the authentication accuracy is improved, but the processing time increases
Solution Approach 1:
The system performs partial processing by first analyzing gesture type and pressure profile characteristics before full fingerprint authentication. This two-stage approach processes only the necessary information initially (gesture and pressure), then proceeds to full fingerprint verification only when needed, reducing overall processing delay while maintaining authentication accuracy through selective full processing.
4Use of energy by moving object
If the system uses pressure profile information to identify authentication intent, then the power consumption is reduced, but the complexity of the system increases
Solution Approach 1:
The system uses the touchscreen display to serve multiple functions: as the user interface for normal operation, as a gesture sensor for detecting drag/swipe inputs, and as a pressure sensor for capturing pressure profiles. By making the display multi-functional, the system adds authentication intent detection capabilities without requiring separate dedicated hardware components, thus reducing system complexity while still enabling pressure-based authentication prediction to reduce power consumption.
Data Source
AI summary
According to certain embodiments, an electronic device comprises a housing comprising a front surface and a rear surface oriented in a direction opposite to the front surface, a touchscreen display exposed through at least a portion of the front surface, a fingerprint sensor arranged between the touchscreen display and the rear surface underlapping a region of the touchscreen display when viewed from above the front surface, at least one processor operatively connected to the touchscreen display and the fingerprint sensor, and a memory operatively connected to the at least one processor, wherein the memory stores instructions for causing the at least one processor, when executed, to perform operations comprising displaying a user interface comprising an object on the touchscreen display, receiving a gesture input for dragging the object toward the region, the gesture input inputted through the touchscreen display, identifying whether a finger providing the gesture input is a predetermined finger registered for authentication through the fingerprint sensor, and activating the fingerprint sensor based at least in part on the identification.