A paperless fax machine with a single-touch panel

Chen, Wen

doi:10.1109/tce.2008.4711191

Cited by 4 publications

(1 citation statement)

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“…OUCH panels are ubiquitously utilized in modern electronic devices, ranging from consumer products [1] [2][3] to medical applications [4][5] [6]. Conventional touch interfaces locate users' touch points by capacitive and resistive means [7] [8].…”

Section: Introductionmentioning

confidence: 99%

Preload Effect Elimination Technique for Piezoelectric Force Touch Sensing in Human-Machine Interactivities

Shi¹,

Chen²,

Lin³

et al. 2020

Preprint

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Piezoelectric touch sensing in interactive displays gains increasing attentions due to its high force detection sensitivity and intrinsic mechanical-to-electrical conversion ability. However, the instable force-voltage responsivity induced by preload effect of piezoelectric materials reduces the force detection accuracy of secondary force touches, which is important to touch and haptic applications such as peek-pop. To address this issue, in this article, we present a preload effect elimination technique, in which the relationship between the piezoelectric coefficients and static preload is studied first, and then the detected secondary force touch is calibrated by using the previously applied static force information. Experimental results demonstrate that the force detection accuracy is boosted by 15.17% after applying the developed technique to secondary force touches with different preload values, potentially allowing the system to precisely interpret secondary force touch amplitude and hence enhancing the development of touch sensing in interactive displays.

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