Touch Panel Sensitivity Zoning During NFC Antenna Operation
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Solution Overview
Problem
The presence of an antenna for near-field communication close to a touch panel can cause interference with the capacitance value of the touch panel, leading to erroneous operations during the operation of the antenna.
Innovation Solution
An electronic apparatus is designed with a touch panel and an antenna for near-field communication, where the detection sensitivity of the touch panel is reduced in areas overlapping with the antenna's communicable area during near-field communication operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an antenna for near-field communication is provided close to the touch panel, then the communication function is improved, but the touch panel may experience erroneous operations due to interference with capacitance values
Solution Approach 1:
The detection area of the touch panel is divided into multiple regions based on the position and communicable area of the NFC antenna. By segmenting the detection area, the system can apply different detection sensitivity settings to different regions, allowing the touch panel to maintain normal operation in non-interfered areas while reducing erroneous detections in areas affected by NFC communication.
Solution Approach 2:
Different detection sensitivity levels are applied to different regions of the touch panel. Specifically, regions overlapping with the NFC antenna's communicable area use reduced detection sensitivity, while other regions maintain normal detection sensitivity. This local differentiation allows the system to preserve touch functionality where needed while minimizing interference effects.
2Reliability
If the detection sensitivity is reduced in overlapping areas, then erroneous operations are prevented, but the touch detection capability in those areas is degraded
Solution Approach 1:
The touch panel implements different detection sensitivity levels for different regions. Regions affected by NFC communication (overlapping with communicable area) use reduced detection sensitivity to prevent erroneous operations, while regions not affected by NFC maintain normal detection sensitivity, preserving optimal touch detection capability where interference is absent.
Solution Approach 2:
The detection area is segmented into multiple zones with different sensitivity characteristics. This segmentation allows the system to optimize each zone independently - reducing sensitivity only where necessary to prevent errors from NFC interference, while maintaining high sensitivity in zones where touch detection is critical and interference is minimal.
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 erroneous operations of the touch panel by reducing detection sensitivity in overlapping areas, thereby minimizing interference from near-field communication activities.
Implementation Method 1
a touch panel for electrically detecting an input operation
Implementation Method 2
an antenna for near-field communication having a communicable area that overlaps at least a part of a detection area of the touch panel
Data Source
AI summary
An electronic apparatus includes a touch panel for electrically detecting an input operation, an antenna for near-field communication having a communicable area that overlaps at least a part of a detection area of the touch panel, a memory storing instructions, and a processor that implements the instructions to reduce a detection sensitivity in a first detection area overlapping with the communicable area in the touch panel when a near-field communication is in progress by the antenna for near-field communication or when a near-field communication is possible by the antenna for near-field communication.