Handwriting Input System Based on Ultrasonic Transducers |
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| Authors: | WANG Yufeng YANG Yi KONG Xiangming LIAO Wenjun WANG Ligang REN Tianling LIU Litian |
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| Institution: | WANG Yufeng,YANG Yi,KONG Xiangming,LIAO Wenjun,WANG Ligang,REN Tianling,LIU Litian 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 ... |
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| Keywords: | collinear transducers PVDF driver and detection circuit handwriting input system |
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