Prevention Method of Electromagnetic Interference by Implementing NFC Radio Active Signal for Touchpad

Volume 5, Issue 3, June 2021     |     PP. 34-39      |     PDF (707 K)    |     Pub. Date: July 5, 2021
DOI: 10.54647/isss12124    105 Downloads     5976 Views  

Author(s)

Hideto Horikoshi, Subsystem Development, Wireless Module Development, Touch Device Development Lenovo Yamato Laboratory, Yokohama, Japan
Hidekazu Chujo, Subsystem Development, Wireless Module Development, Touch Device Development Lenovo Yamato Laboratory, Yokohama, Japan

Abstract
This paper reviews the patented control method of preventing the electromangnetic interference from NFC antenna to touchpad sense lines efficirntly. The NFC antenna was integrated under the touchpad by implementing NFC_radio_active signal from the NFC module to the touchpad sensor controller IC. The conventional control method required fine-tuning of the touchpad sensor firmware was required to detect and learn the NFC antenna trace in order to prevent this electromagnetic interference.

Keywords
NFC; touchpad;interference; NFC_radio_active signal; NFC radio; NFC antenna pattern trace; NFC touch mark icon

Cite this paper
Hideto Horikoshi, Hidekazu Chujo, Prevention Method of Electromagnetic Interference by Implementing NFC Radio Active Signal for Touchpad , SCIREA Journal of Information Science and Systems Science. Volume 5, Issue 3, June 2021 | PP. 34-39. 10.54647/isss12124

References

[ 1 ] NFC Antenna Integration Into 5-Button Trackpad for Metal-Covered Ultrabooks, IEEE GCCE2014 Paper, Hideto Horikoshi, Yi Zheng
[ 2 ] https://www.synaptics.com/technology/touch-sensing
[ 3 ] Electronic Equipment for Preventing Malfunction of Touch Panel and Prevention Method of Malfunction, JP Patent Registration Number JP6193450B, Registration Date 2017.8.18, Lenovo Japan, Hideto Horikoshi, Hidekazu Chujo, Masahiro Kitamura, Mitsuo Horiuchi
[ 4 ] ISO/IEC14443-1 International Standard, Identification Cards, Contactless integrated cards - Proximity cards, amendment 1