Touch Detection Region Control During NFC Communication
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Solution Overview
Problem
Existing electronic devices face challenges in maintaining convenient touch operations during short-range or proximity communication, particularly in contactless payment systems where noise from communication devices can cause unintended touch detections and impair user experience.
Innovation Solution
The electronic device is configured with a detector and controller to differentiate between detection regions, allowing manual input only in specific areas during communication, thereby preventing unintended touch inputs while enabling essential operations during contactless transactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the detection sensitivity of the touchpad is lowered during NFC communication, then communication noise interference is reduced, but touch operation responsiveness deteriorates
Solution Approach 1:
The touchpad detection surface is divided into multiple detection regions (first detection region and second detection region) with different sensitivity levels. The first detection region has reduced sensitivity during NFC communication to avoid false triggers from communication noise, while the second detection region maintains normal sensitivity for intentional touch operations. This spatial segmentation allows simultaneous optimization of both communication noise rejection and touch responsiveness.
Solution Approach 2:
Different regions of the touchpad are assigned different detection sensitivities based on their functional requirements. The first detection region (overlapping with NFC communication area) uses reduced sensitivity to prevent false touch inputs during communication, while the second detection region uses normal sensitivity to ensure responsive touch operations. This local differentiation of detection quality resolves the contradiction between noise rejection and operational responsiveness.
2Reliability
If the detection sensitivity of the touchpad is reduced during communication, then false touch detections are minimized, but user convenience deteriorates
Solution Approach 1:
The touchpad is segmented into multiple detection regions with different sensitivity characteristics. By segmenting the detection surface, the system can apply reduced sensitivity only where necessary (first detection region during NFC communication) while maintaining normal sensitivity in other areas (second detection region), thus preventing false detections without unnecessarily degrading overall user convenience.
Solution Approach 2:
The detection sensitivity of different regions is dynamically adjusted based on the operational state. During NFC communication, the first detection region switches to reduced sensitivity to prevent false touches, while the second detection region maintains normal sensitivity. When communication ends, sensitivity levels are restored. This dynamic adaptation ensures reliability during communication while preserving user convenience during normal operation.
Data Source
AI summary
An electronic device includes a detector, a controller, and a communicator. The detector is configured to detect an object in proximity or contact. The controller is configured to accept a manual operation corresponding to the proximity or contact of an object. The communicator is disposed to allow for communication with a communication device brought into proximity from a detection surface side. The detection surface has first and second detection regions. The first detection region includes a range obtained by projecting onto the detection surface a region that is less than a detection distance from the detection surface from out of a region of communication availability between the communication device and the communicator. In a period of communication processing between the communicator and the communication device, the controller is configured to limit manual input in the first detection region, but to accept manual input in the second detection region.