Interference haptic stimulation and consistent quantitative tactility in transparent electrotactile screen with pressure-sensitive transistors

Kyeonghee Lim, Jakyoung Lee, Sumin Kim, Myoungjae Oh, Chin Su Koh, Hunkyu Seo, Yeon-Mi Hong, Won Gi Chung, Jiuk Jang, Jung Ah Lim, Hyun Ho Jung () and Jang-Ung Park ()
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Kyeonghee Lim: Yonsei University
Jakyoung Lee: Yonsei University
Sumin Kim: Yonsei University
Myoungjae Oh: Yonsei University
Chin Su Koh: Yonsei University College of Medicine
Hunkyu Seo: Yonsei University
Yeon-Mi Hong: Yonsei University
Won Gi Chung: Yonsei University
Jiuk Jang: Yonsei University
Jung Ah Lim: Yonsei-KIST Convergence Research Institute
Hyun Ho Jung: Yonsei University College of Medicine
Jang-Ung Park: Yonsei University

Nature Communications, 2024, vol. 15, issue 1, 1-15

Abstract: Abstract Integrating tactile feedback through haptic interfaces enhances experiences in virtual and augmented reality. However, electrotactile systems, which stimulate mechanoreceptors directly, often yield inconsistent tactile results due to variations in pressure between the device and the finger. In this study, we present the integration of a transparent electrotactile screen with pressure-sensitive transistors, ensuring highly consistent quantitative haptic sensations. These transistors effectively calibrate tactile variations caused by touch pressure. Additionally, we explore remote-distance tactile stimulations achieved through the interference of electromagnetic waves. We validated tactile perception using somatosensory evoked potentials, monitoring the somatosensory cortex response. Our haptic screen can stimulate diverse electrotactile sensations and demonstrate various tactile patterns, including Morse code and Braille, when integrated with portable smart devices, delivering a more immersive experience. Furthermore, interference of electric fields allows haptic stimulation to facilitate diverse stimulus positioning at lower current densities, extending the reach beyond direct contact with electrodes of our screen.

Date: 2024
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DOI: 10.1038/s41467-024-51593-2

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