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Journal |
Textile Coloration and Finishing |
Year / Vol., Issue, Month |
2019 / V.31,no.2,Jun |
Title |
Multi-point Flexible Touch Sensor Based on Capacitor Structure Using Thin Copper-Plated Polyimide Film for Textile Applications |
Authors |
Junheon Lee and Taekyeong Kim |
Institution/Affiliations |
Kyungpook National University |
Pages/Total page |
pp.65 ~ 76 / 12 |
Language |
English |
Abstract |
A multi-point touch input sensor having different sizes or different capacitance
touch points connected by only one pair of signal transmission lines was fabricated using
a polyimide film coated with a thin copper plate. The capacitance increases with the decrease
in the number of sheets of fabric spacers placed between the two sheets of the
polyimide film. Therefore, the touch input sensor could be manufactured without fabric
spacers, which was possible by the action of the polyimide film as a dielectric material in
the capacitor. On the multi-point touch sensor, higher capacitance was obtained when
pressing wider-area touch points with 10mm to 25mm diameter on average. However,
the capacitance of a system comprising two sheets of touch sensors was considerably
low, causing a serious overlap of the capacitance values according to the data collected
from the reliability test. Although the capacitance values could be increased by stacking
several sheets of touch sensors, the overlap of data was still observed. After reducing the
size of all touch points to 10mm and stacking up to eight sheets of sensors, reliable and
consistent capacitance data was obtained. Five different capacitance signals could be induced
in the sensors by pushing touch points simultaneously. |
Keywords |
flexible touch sensor, wearable, polyimide, capacitance, convergence |
Download |
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Reference |
http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OSGGBT_2019_v31n2_65&ordernum= |
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