Touch Panel NFC Interference Control via Proximity Sensor
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Solution Overview
Problem
Near field communication in electronic apparatuses can cause electrical interference with touch panels, leading to malfunction, as the communication antenna is often positioned in close proximity to the touch panel, disrupting its detection functionality.
Innovation Solution
Incorporating a proximity sensor near the touch panel and communication antenna, a processor sets the electronic apparatus to a near field communication mode when a communication medium is detected, thereby stopping the touch panel's detection function to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the communication antenna is disposed on the back surface of the touch panel to save arrangement space, then the device structure is compact, but magnetic flux disturbance and scan noise affect the touch panel causing malfunction
Solution Approach 1:
The system dynamically switches between touch panel detection mode and NFC communication mode based on operational state. When NFC communication is active, the touch panel detection function is temporarily suspended to prevent interference, and resumes when NFC communication ends. This dynamic control resolves the contradiction by allowing both functions to coexist in a compact structure without simultaneous interference.
2Ease of operation
If the touch panel detection function operates continuously, then user interface responsiveness is maintained, but electrical interference from near field communication causes touch panel malfunction
Solution Approach 1:
The system implements periodic switching between detection modes. The touch panel detection function operates periodically, being activated when NFC communication is not active and deactivated when NFC communication begins. This periodic action ensures user interface responsiveness is maintained during touch operations while preventing electrical interference during NFC communication periods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively prevents electrical interference and malfunction of the touch panel by selectively disabling its detection during near field communication, ensuring reliable operation and user convenience.
Implementation Method 1
a proximity sensor configured to detect proximity of a communication medium
Implementation Method 2
an antenna for near field communication... performs wireless communication with the detected wireless communication device
Data Source
AI summary
An electronic apparatus includes a touch panel with a detection function, an antenna for near field communication, a proximity sensor configured to detect proximity of a communication medium and located near the touch panel, and a processor. In a case that the proximity sensor detects the proximity of the communication medium for communicating with the antenna, the processor sets an operating mode of the electronics apparatus to a near field communication mode for a wireless transmission by the antenna and stops the detection function of the touch panel.