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Handwriting Input System Based on Ultrasonic Transducers

Yufeng WANG, Yi YANG, Xiangming KONG, Wenjun LIAO, Ligang WANG, Tianling REN ( ), Litian LIU
Tsinghua National Laboratory for Information Science and Technology, Institute of Microelectronics, Tsinghua University, Beijing 100084, China
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Abstract

A handwriting input system was developed using three collinear ultrasonic transducers. These collinear polyvinylidene fluoride (PVDF) transducers were specially designed for the handwriting input system to give a large writeable area with writing in any direction. Driver and detection circuits were developed for the handwriting system. This handwriting input system based on 2-dimensional position tracing has large writeable area (A4 paper), low drive voltage (5 V), and is independent of the handwriting pad or the pen.

Keywords

collinear transducersPVDFdriver and detection circuithandwriting input system

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Tsinghua Science and Technology
Volume 16 Issue 3,
June 2011
Pages 290-294
DOI: 10.1016/S1007-0214(11)70042-6

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Cite this article:
WANG Y, YANG Y, KONG X, et al. Handwriting Input System Based on Ultrasonic Transducers. Tsinghua Science and Technology, 2011, 16(3): 290-294. https://doi.org/10.1016/S1007-0214(11)70042-6

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Received: 05 January 2011
Revised: 16 January 2011
Published: 01 June 2011
© Tsinghua University Press 2011