Fingerprint Recognition Device Dynamic Readout Zone Adjustment
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Solution Overview
Problem
Fingerprint recognition systems often fail due to unregistered or affected fingerprints, leading to repeated user adjustments of pressing positions, which worsens user feedback and recognition accuracy.
Innovation Solution
A method and device that automatically adjust the fingerprint readout zone based on the initial touch position and matching information when recognition fails, allowing multiple recognition attempts without user intervention, thereby improving accuracy and feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the user manually adjusts the pressing position multiple times when fingerprint recognition fails, then the recognition accuracy may improve, but the user experience and somatosensory feedback deteriorate
Solution Approach 1:
The system automatically performs multiple recognition attempts by adjusting the readout zone without requiring user intervention. The controller autonomously generates updated fingerprint positions and performs additional sensing operations, allowing the system to serve itself in improving recognition accuracy without burdening the user with manual position adjustments.
Solution Approach 2:
The fingerprint readout zone is made dynamic and adjustable based on recognition results. When recognition fails, the system automatically updates the readout zone parameters and performs sensing again with modified parameters, creating a dynamic adaptation process that improves accuracy without requiring static user action.
2Measurement precision
If the system performs multiple fingerprint recognition attempts with different readout zones, then the recognition accuracy improves, but the recognition time increases
Solution Approach 1:
The system performs a limited number of additional recognition attempts (excessive action beyond the first attempt) only when needed, rather than continuously. This partial repetition of the recognition process provides sufficient accuracy improvement while limiting the time penalty by not performing unlimited attempts.
Solution Approach 2:
The system performs preliminary analysis of the first recognition result to determine whether additional attempts are necessary. By pre-assessing the recognition outcome and only initiating additional readout zone adjustments when failure occurs, the system avoids unnecessary time consumption while maintaining the capability to improve accuracy when needed.
3Extent of automation
If the system automatically generates updated fingerprint positions and performs additional sensing operations, then user intervention is reduced, but the system complexity increases
Solution Approach 1:
The existing fingerprint sensing system is extended to perform multiple functions: initial recognition, failure detection, automatic readout zone adjustment, and repeated sensing operations. By making the existing controller and sensing components multi-functional rather than adding separate dedicated systems, the automation is achieved with minimal increase in overall system complexity.
Solution Approach 2:
The automatic position adjustment and repeated recognition functions are merged into the existing fingerprint recognition workflow. The controller integrates the logic for determining recognition failure, generating updated positions, and initiating additional sensing operations within the same processing unit, consolidating functions rather than distributing them across separate complex subsystems.
Data Source
AI summary
A method for fingerprint recognition and a fingerprint recognition device are provided. The method includes the following steps. A touch position of a touch panel is obtained as a fingerprint position. A fingerprint recognition operation is performed according to the fingerprint position. Whether the fingerprint recognition operation is successful is determined. In response to determining that the fingerprint recognition operation is not successful, at least one first position of the touch panel as an updated fingerprint position is generated according to the touch position of the touch panel, and the fingerprint recognition operation is performed according to the updated fingerprint position.