Fingerprint Sensor Segmentation for Mobile Registration
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Solution Overview
Problem
Existing fingerprint registration methods on mobile devices are inefficient due to the small size of fingerprint sensors, requiring multiple attempts and focusing on specific points, leading to unnecessary collection of similar fingerprint information and low recognition rates.
Innovation Solution
A method that combines swipe and touch methods for fingerprint information collection, using a processor to identify and register fingerprint areas based on a reference area, providing feedback to users for optimal fingerprint registration by displaying collected and registered information, and allowing input of fingerprint information corresponding to unregistered areas within a target area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a small fingerprint sensor is used in mobile devices, then the device size is reduced and portability is improved, but the fingerprint recognition rate decreases and multiple registration attempts are required
Solution Approach 1:
The patent applies segmentation by dividing the fingerprint sensor into multiple independent sensing regions (first fingerprint area and second fingerprint area). Each region can be independently activated and processed, allowing the small sensor to systematically cover different portions of the fingerprint pattern through sequential sensing operations, thereby improving recognition rate without increasing overall sensor size
Solution Approach 2:
The patent implements periodic action through repeated fingerprint sensing operations. The controller performs multiple sensing cycles, each focusing on different fingerprint areas (core region, ridge region, etc.), accumulating fingerprint data over time to achieve complete fingerprint pattern recognition despite the limited sensor area
2Reliability
If fingerprint information is collected multiple times to increase recognition rate, then the recognition accuracy improves, but the registration process time increases and efficiency decreases
Solution Approach 1:
The patent applies preliminary action by pre-dividing the fingerprint sensor into multiple functional areas (core region, ridge region, edge region, etc.) before the actual fingerprint registration. This allows the system to systematically and efficiently collect fingerprint data from each region in a single coordinated process, reducing the need for multiple separate registration attempts and improving overall registration efficiency
Solution Approach 2:
The patent merges multiple fingerprint sensing operations into a unified registration process. By combining the collection of fingerprint data from different sensor regions and integrating it into a single fingerprint template, the system achieves complete fingerprint recognition in one efficient process rather than requiring multiple separate registration attempts
3Device complexity
If fingerprint area is extracted based on a specific point (e.g., core point), then the extraction process is simplified, but the fingerprint information coverage is restricted and similar areas are unnecessarily collected
Solution Approach 1:
The patent segments the fingerprint sensor area into multiple distinct regions (core region, ridge region, edge region, etc.) rather than focusing on a single specific point. Each region is independently identified and processed, ensuring comprehensive coverage of the entire fingerprint pattern while maintaining a systematic and manageable extraction process through clear regional definitions
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
An electronic device is provided. The electronic device includes a reflector sheet disposed under a display panel and a digitizer disposed under the reflector sheet. The digitizer may include a first circuit layer including a conductive circuit pattern arranged in a first direction, a second circuit layer including a conductive circuit pattern arranged in a second direction, and an insulating layer electrically isolating the first circuit layer and the second circuit layer. The digitizer further includes at least one dummy circuit pattern formed on at least one of the first circuit layer or the second circuit layer.