Fingerprint Sensor Touch Input Region Segmentation
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Solution Overview
Problem
Existing fingerprint recognition methods in portable terminals can inadvertently perform undesired functions if touch events occur near the fingerprint sensor, leading to user inconvenience and incorrect function execution.
Innovation Solution
A method and portable terminal configuration that senses touch inputs via a fingerprint scanning sensor, determines if the input is on a screen object, deactivates the corresponding function, and performs the intended function through the sensor, with a processor managing these operations and designating a bottom area as inactive to prevent unintended function execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch input is sensed via fingerprint scanning sensor, then fingerprint recognition function is enabled, but unintended functions may be executed due to adjacent area touch events
Solution Approach 1:
The display screen is divided into multiple regions: a first region corresponding to the fingerprint scanning sensor area and a second region surrounding the first region. Touch events in the second region are detected and used to deactivate corresponding functions, preventing unintended execution while allowing fingerprint recognition in the first region to proceed normally.
Solution Approach 2:
Before executing a function triggered by a touch event in the second region, the system detects whether a fingerprint recognition operation is simultaneously occurring. If fingerprint recognition is detected, the system preemptively deactivates the function corresponding to the touch event, preventing the harmful unintended execution before it can occur.
2Productivity
If touch swipe method is used for fingerprint input, then input speed is improved, but adjacent area touches may trigger incorrect functions
Solution Approach 1:
The display is segmented into a first region for fingerprint scanning and a second region for other interactions. During a touch swipe operation in the first region, any touch events detected in the second region are identified as potential unintended inputs, and their corresponding functions are deactivated to maintain execution accuracy while preserving the speed benefit of touch swipe.
Solution Approach 2:
The system continuously monitors touch events in both regions simultaneously. When a touch swipe is detected in the first region, the system provides real-time feedback by detecting and deactivating functions associated with touch events in the second region, ensuring that rapid input does not compromise function execution accuracy.
3Ease of operation
If touch event detection is enabled on the screen, then user interaction is enhanced, but functions may be deactivated incorrectly due to false touch events
Solution Approach 1:
Different quality control is applied to different regions: the first region allows full touch interaction functionality while the second region has restricted functionality during fingerprint recognition operations. This local differentiation ensures that user interaction remains enhanced in appropriate areas while preventing incorrect function deactivation through region-specific touch event handling.
Data Source
AI summary
A method for recognizing a fingerprint in a portable terminal includes, if a touch input is sensed via a fingerprint scanning sensor, determining whether a touch input event is detected on an object displayed on a screen, deactivating a function corresponding to the detected touch input event on the object if the touch input event is sensed, and performing a function corresponding to the sensed touch input via the fingerprint scanning sensor. A portable terminal includes a display unit configured to display at least one object on a screen, a fingerprint scanning sensor configured to sense a touch input, and a processor configured to deactivate a function corresponding to the detected touch input event on the at least one object if the touch input is sensed, and to perform a function corresponding to the sensed touch event via the finger scanning sensor.