Display integrated flexible and transparent large-area pyroelectric gesture recognition /piezoelectric touch control sensor array based on in-situ polarized PVDF-TrFE films

Kailun WANG, Qiang LIU, Qian ZHANG, Yong XIANG*, Xiaoran HU

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

1 Citation (Scopus)

Abstract

In this work, a display integrated flexible and transparent sensor array is prepared to simultaneously realize pyroelectric gesture recognition and piezoelectric touch control based on in-situ polarization of PVDF-TrFE film. The in-situ polarization approach ensures 300 × 340 mm2 large-area PVDF-TrFE film with high uniform pyroelectricity and significantly improves polarization efficiency and production yield. For gesture recognition, the prepared sensor array can accurately detect 0.5 ℃ temperature change and track motion trace of human hand gesture with a distance of 10 cm, and the temperature-voltage linearity is higher than 99 %. For touch control, the prepared sensor array can achieve a touch resolution of 1 mm and reach a signal-to-noise ratio of 400 %. Besides, the display integrated sensor array possesses a good transmittance of 90 % and high flexibility with a bending degree of 180°. The gesture recognition/touch control sensor array is expected to be applied in the fields of wearable electronic products and multi-functional of displays.

Original languageEnglish
Article number114406
Number of pages8
JournalSensors and Actuators A: Physical
Volume357
DOIs
Publication statusPublished - 1 Aug 2023
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

  • Gesture recognition
  • Human-computer interaction
  • In-situ polarization
  • PVDF-TrFE
  • Pyroelectricity

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